mirror of https://gitee.com/openkylin/linux.git
211 lines
5.9 KiB
C
211 lines
5.9 KiB
C
/*
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* DVB USB library - provides a generic interface for a DVB USB device driver.
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*
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* dvb-usb-init.c
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*
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* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, version 2.
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*
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* see Documentation/dvb/README.dvb-usb for more information
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*/
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#include "dvb-usb-common.h"
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/* debug */
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int dvb_usb_debug;
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module_param_named(debug,dvb_usb_debug, int, 0644);
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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);
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int dvb_usb_disable_rc_polling;
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module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);
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MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");
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/* general initialization functions */
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static int dvb_usb_exit(struct dvb_usb_device *d)
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{
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deb_info("state before exiting everything: %x\n",d->state);
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dvb_usb_remote_exit(d);
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dvb_usb_fe_exit(d);
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dvb_usb_i2c_exit(d);
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dvb_usb_dvb_exit(d);
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dvb_usb_urb_exit(d);
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deb_info("state should be zero now: %x\n",d->state);
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d->state = DVB_USB_STATE_INIT;
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kfree(d->priv);
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kfree(d);
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return 0;
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}
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static int dvb_usb_init(struct dvb_usb_device *d)
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{
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int ret = 0;
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mutex_init(&d->usb_mutex);
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mutex_init(&d->i2c_mutex);
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d->state = DVB_USB_STATE_INIT;
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/* check the capabilities and set appropriate variables */
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/* speed - when running at FULL speed we need a HW PID filter */
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if (d->udev->speed == USB_SPEED_FULL && !(d->props.caps & DVB_USB_HAS_PID_FILTER)) {
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err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
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return -ENODEV;
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}
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if ((d->udev->speed == USB_SPEED_FULL && d->props.caps & DVB_USB_HAS_PID_FILTER) ||
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(d->props.caps & DVB_USB_NEED_PID_FILTERING)) {
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info("will use the device's hardware PID filter (table count: %d).",d->props.pid_filter_count);
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d->pid_filtering = 1;
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d->max_feed_count = d->props.pid_filter_count;
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} else {
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info("will pass the complete MPEG2 transport stream to the software demuxer.");
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d->pid_filtering = 0;
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d->max_feed_count = 255;
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}
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if (d->props.power_ctrl)
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d->props.power_ctrl(d,1);
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if ((ret = dvb_usb_urb_init(d)) ||
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(ret = dvb_usb_dvb_init(d)) ||
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(ret = dvb_usb_i2c_init(d)) ||
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(ret = dvb_usb_fe_init(d))) {
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dvb_usb_exit(d);
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return ret;
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}
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if ((ret = dvb_usb_remote_init(d)))
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err("could not initialize remote control.");
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if (d->props.power_ctrl)
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d->props.power_ctrl(d,0);
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return 0;
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}
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/* determine the name and the state of the just found USB device */
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static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_properties *props, int *cold)
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{
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int i,j;
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struct dvb_usb_device_description *desc = NULL;
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*cold = -1;
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for (i = 0; i < props->num_device_descs; i++) {
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for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
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deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
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if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
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props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
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*cold = 1;
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desc = &props->devices[i];
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break;
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}
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}
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if (desc != NULL)
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break;
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for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
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deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
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if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
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props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
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*cold = 0;
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desc = &props->devices[i];
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break;
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}
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}
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}
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if (desc != NULL && props->identify_state != NULL)
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props->identify_state(udev,props,&desc,cold);
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return desc;
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}
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/*
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* USB
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*/
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int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties
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*props, struct module *owner,struct dvb_usb_device **du)
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{
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struct usb_device *udev = interface_to_usbdev(intf);
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struct dvb_usb_device *d = NULL;
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struct dvb_usb_device_description *desc = NULL;
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int ret = -ENOMEM,cold=0;
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if (du != NULL)
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*du = NULL;
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if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) {
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deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
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return -ENODEV;
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}
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if (cold) {
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info("found a '%s' in cold state, will try to load a firmware",desc->name);
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ret = dvb_usb_download_firmware(udev,props);
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if (!props->no_reconnect)
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return ret;
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}
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info("found a '%s' in warm state.",desc->name);
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d = kzalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
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if (d == NULL) {
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err("no memory for 'struct dvb_usb_device'");
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return ret;
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}
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d->udev = udev;
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memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
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d->desc = desc;
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d->owner = owner;
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if (d->props.size_of_priv > 0) {
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d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL);
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if (d->priv == NULL) {
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err("no memory for priv in 'struct dvb_usb_device'");
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kfree(d);
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return -ENOMEM;
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}
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}
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usb_set_intfdata(intf, d);
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if (du != NULL)
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*du = d;
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ret = dvb_usb_init(d);
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if (ret == 0)
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info("%s successfully initialized and connected.",desc->name);
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else
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info("%s error while loading driver (%d)",desc->name,ret);
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return ret;
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}
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EXPORT_SYMBOL(dvb_usb_device_init);
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void dvb_usb_device_exit(struct usb_interface *intf)
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{
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struct dvb_usb_device *d = usb_get_intfdata(intf);
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const char *name = "generic DVB-USB module";
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usb_set_intfdata(intf,NULL);
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if (d != NULL && d->desc != NULL) {
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name = d->desc->name;
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dvb_usb_exit(d);
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}
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info("%s successfully deinitialized and disconnected.",name);
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}
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EXPORT_SYMBOL(dvb_usb_device_exit);
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MODULE_VERSION("0.3");
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MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
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MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
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MODULE_LICENSE("GPL");
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