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348 lines
9.5 KiB
348 lines
9.5 KiB
// 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 ([email protected]) |
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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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err_i2c_init: |
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dvb_usb_i2c_exit(d); |
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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 <[email protected]>"); |
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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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