// SPDX-License-Identifier: GPL-2.0-only
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/*
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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) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
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*
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* see Documentation/driver-api/media/drivers/dvb-usb.rst 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,mem=128,uxfer=256 (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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static int dvb_usb_force_pid_filter_usage;
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module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
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MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
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static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
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{
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struct dvb_usb_adapter *adap;
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int ret, n, o;
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for (n = 0; n < d->props.num_adapters; n++) {
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adap = &d->adapter[n];
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adap->dev = d;
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adap->id = n;
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memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties));
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for (o = 0; o < adap->props.num_frontends; o++) {
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struct dvb_usb_adapter_fe_properties *props = &adap->props.fe[o];
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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 && !(props->caps & DVB_USB_ADAP_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 && props->caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
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(props->caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
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info("will use the device's hardware PID filter (table count: %d).", props->pid_filter_count);
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adap->fe_adap[o].pid_filtering = 1;
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adap->fe_adap[o].max_feed_count = 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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adap->fe_adap[o].pid_filtering = 0;
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adap->fe_adap[o].max_feed_count = 255;
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}
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if (!adap->fe_adap[o].pid_filtering &&
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dvb_usb_force_pid_filter_usage &&
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props->caps & DVB_USB_ADAP_HAS_PID_FILTER) {
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info("pid filter enabled by module option.");
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adap->fe_adap[o].pid_filtering = 1;
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adap->fe_adap[o].max_feed_count = props->pid_filter_count;
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}
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if (props->size_of_priv > 0) {
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adap->fe_adap[o].priv = kzalloc(props->size_of_priv, GFP_KERNEL);
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if (adap->fe_adap[o].priv == NULL) {
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err("no memory for priv for adapter %d fe %d.", n, o);
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return -ENOMEM;
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}
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}
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}
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if (adap->props.size_of_priv > 0) {
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adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL);
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if (adap->priv == NULL) {
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err("no memory for priv for adapter %d.", n);
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return -ENOMEM;
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}
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}
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ret = dvb_usb_adapter_stream_init(adap);
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if (ret)
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return ret;
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ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs);
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if (ret)
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goto dvb_init_err;
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ret = dvb_usb_adapter_frontend_init(adap);
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if (ret)
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goto frontend_init_err;
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/* use exclusive FE lock if there is multiple shared FEs */
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if (adap->fe_adap[1].fe)
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adap->dvb_adap.mfe_shared = 1;
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d->num_adapters_initialized++;
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d->state |= DVB_USB_STATE_DVB;
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}
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/*
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* when reloading the driver w/o replugging the device
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* sometimes a timeout occurs, this helps
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*/
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if (d->props.generic_bulk_ctrl_endpoint != 0) {
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usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
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usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
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}
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return 0;
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frontend_init_err:
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dvb_usb_adapter_dvb_exit(adap);
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dvb_init_err:
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dvb_usb_adapter_stream_exit(adap);
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return ret;
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}
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static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
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{
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int n;
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for (n = 0; n < d->num_adapters_initialized; n++) {
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dvb_usb_adapter_frontend_exit(&d->adapter[n]);
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dvb_usb_adapter_dvb_exit(&d->adapter[n]);
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dvb_usb_adapter_stream_exit(&d->adapter[n]);
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kfree(d->adapter[n].priv);
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}
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d->num_adapters_initialized = 0;
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d->state &= ~DVB_USB_STATE_DVB;
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return 0;
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}
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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_adapter_exit(d);
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dvb_usb_i2c_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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if (d->priv != NULL && d->props.priv_destroy != NULL)
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d->props.priv_destroy(d);
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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, short *adapter_nums)
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{
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int ret = 0;
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mutex_init(&d->data_mutex);
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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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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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return -ENOMEM;
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}
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if (d->props.priv_init != NULL) {
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ret = d->props.priv_init(d);
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if (ret != 0)
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goto err_priv_init;
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}
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}
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/* check the capabilities and set appropriate variables */
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dvb_usb_device_power_ctrl(d, 1);
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ret = dvb_usb_i2c_init(d);
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if (ret)
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goto err_i2c_init;
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ret = dvb_usb_adapter_init(d, adapter_nums);
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if (ret)
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goto err_adapter_init;
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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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dvb_usb_device_power_ctrl(d, 0);
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return 0;
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err_adapter_init:
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dvb_usb_adapter_exit(d);
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dvb_usb_i2c_exit(d);
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err_i2c_init:
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if (d->priv && d->props.priv_destroy)
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d->props.priv_destroy(d);
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err_priv_init:
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kfree(d->priv);
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d->priv = NULL;
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return ret;
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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 const struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, const struct dvb_usb_device_properties *props, int *cold)
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{
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int i, j;
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const 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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int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
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{
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if (onoff)
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d->powered++;
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else
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d->powered--;
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if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */
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deb_info("power control: %d\n", onoff);
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if (d->props.power_ctrl)
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return d->props.power_ctrl(d, onoff);
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}
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return 0;
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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,
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const struct dvb_usb_device_properties *props,
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struct module *owner, struct dvb_usb_device **du,
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short *adapter_nums)
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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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const 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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d = kzalloc(sizeof(*d), GFP_KERNEL);
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if (!d) {
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err("no memory for 'struct dvb_usb_device'");
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return -ENOMEM;
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}
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memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));
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desc = dvb_usb_find_device(udev, &d->props, &cold);
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if (!desc) {
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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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ret = -ENODEV;
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goto error;
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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 || ret != 0)
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goto error;
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}
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info("found a '%s' in warm state.", desc->name);
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d->udev = udev;
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d->desc = desc;
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d->owner = owner;
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usb_set_intfdata(intf, d);
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ret = dvb_usb_init(d, adapter_nums);
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if (ret) {
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info("%s error while loading driver (%d)", desc->name, ret);
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goto error;
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}
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if (du)
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*du = d;
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info("%s successfully initialized and connected.", desc->name);
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return 0;
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error:
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usb_set_intfdata(intf, NULL);
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kfree(d);
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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 *default_name = "generic DVB-USB module";
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char name[40];
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usb_set_intfdata(intf, NULL);
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if (d != NULL && d->desc != NULL) {
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strscpy(name, d->desc->name, sizeof(name));
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dvb_usb_exit(d);
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} else {
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strscpy(name, default_name, sizeof(name));
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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("1.0");
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MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.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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