| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * DVB USB library - provides a generic interface for a DVB USB device driver. |
| * |
| * dvb-usb-init.c |
| * |
| * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) |
| * |
| * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information |
| */ |
| #include "dvb-usb-common.h" |
| |
| /* debug */ |
| int dvb_usb_debug; |
| module_param_named(debug, dvb_usb_debug, int, 0644); |
| 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); |
| |
| int dvb_usb_disable_rc_polling; |
| module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644); |
| MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0)."); |
| |
| static int dvb_usb_force_pid_filter_usage; |
| module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444); |
| MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0)."); |
| |
| static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs) |
| { |
| struct dvb_usb_adapter *adap; |
| int ret, n, o; |
| |
| for (n = 0; n < d->props.num_adapters; n++) { |
| adap = &d->adapter[n]; |
| adap->dev = d; |
| adap->id = n; |
| |
| memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties)); |
| |
| for (o = 0; o < adap->props.num_frontends; o++) { |
| struct dvb_usb_adapter_fe_properties *props = &adap->props.fe[o]; |
| /* speed - when running at FULL speed we need a HW PID filter */ |
| if (d->udev->speed == USB_SPEED_FULL && !(props->caps & DVB_USB_ADAP_HAS_PID_FILTER)) { |
| err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)"); |
| return -ENODEV; |
| } |
| |
| if ((d->udev->speed == USB_SPEED_FULL && props->caps & DVB_USB_ADAP_HAS_PID_FILTER) || |
| (props->caps & DVB_USB_ADAP_NEED_PID_FILTERING)) { |
| info("will use the device's hardware PID filter (table count: %d).", props->pid_filter_count); |
| adap->fe_adap[o].pid_filtering = 1; |
| adap->fe_adap[o].max_feed_count = props->pid_filter_count; |
| } else { |
| info("will pass the complete MPEG2 transport stream to the software demuxer."); |
| adap->fe_adap[o].pid_filtering = 0; |
| adap->fe_adap[o].max_feed_count = 255; |
| } |
| |
| if (!adap->fe_adap[o].pid_filtering && |
| dvb_usb_force_pid_filter_usage && |
| props->caps & DVB_USB_ADAP_HAS_PID_FILTER) { |
| info("pid filter enabled by module option."); |
| adap->fe_adap[o].pid_filtering = 1; |
| adap->fe_adap[o].max_feed_count = props->pid_filter_count; |
| } |
| |
| if (props->size_of_priv > 0) { |
| adap->fe_adap[o].priv = kzalloc(props->size_of_priv, GFP_KERNEL); |
| if (adap->fe_adap[o].priv == NULL) { |
| err("no memory for priv for adapter %d fe %d.", n, o); |
| return -ENOMEM; |
| } |
| } |
| } |
| |
| if (adap->props.size_of_priv > 0) { |
| adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL); |
| if (adap->priv == NULL) { |
| err("no memory for priv for adapter %d.", n); |
| return -ENOMEM; |
| } |
| } |
| |
| ret = dvb_usb_adapter_stream_init(adap); |
| if (ret) |
| goto stream_init_err; |
| |
| ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs); |
| if (ret) |
| goto dvb_init_err; |
| |
| ret = dvb_usb_adapter_frontend_init(adap); |
| if (ret) |
| goto frontend_init_err; |
| |
| /* use exclusive FE lock if there is multiple shared FEs */ |
| if (adap->fe_adap[1].fe && adap->dvb_adap.mfe_shared < 1) |
| adap->dvb_adap.mfe_shared = 1; |
| |
| d->num_adapters_initialized++; |
| d->state |= DVB_USB_STATE_DVB; |
| } |
| |
| /* |
| * when reloading the driver w/o replugging the device |
| * sometimes a timeout occurs, this helps |
| */ |
| if (d->props.generic_bulk_ctrl_endpoint != 0) { |
| usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint)); |
| usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint)); |
| } |
| |
| return 0; |
| |
| frontend_init_err: |
| dvb_usb_adapter_dvb_exit(adap); |
| dvb_init_err: |
| dvb_usb_adapter_stream_exit(adap); |
| stream_init_err: |
| kfree(adap->priv); |
| return ret; |
| } |
| |
| static int dvb_usb_adapter_exit(struct dvb_usb_device *d) |
| { |
| int n; |
| |
| for (n = 0; n < d->num_adapters_initialized; n++) { |
| dvb_usb_adapter_frontend_exit(&d->adapter[n]); |
| dvb_usb_adapter_dvb_exit(&d->adapter[n]); |
| dvb_usb_adapter_stream_exit(&d->adapter[n]); |
| kfree(d->adapter[n].priv); |
| } |
| d->num_adapters_initialized = 0; |
| d->state &= ~DVB_USB_STATE_DVB; |
| return 0; |
| } |
| |
| |
| /* general initialization functions */ |
| static int dvb_usb_exit(struct dvb_usb_device *d) |
| { |
| deb_info("state before exiting everything: %x\n", d->state); |
| dvb_usb_remote_exit(d); |
| dvb_usb_adapter_exit(d); |
| dvb_usb_i2c_exit(d); |
| deb_info("state should be zero now: %x\n", d->state); |
| d->state = DVB_USB_STATE_INIT; |
| |
| if (d->priv != NULL && d->props.priv_destroy != NULL) |
| d->props.priv_destroy(d); |
| |
| kfree(d->priv); |
| kfree(d); |
| return 0; |
| } |
| |
| static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums) |
| { |
| int ret = 0; |
| |
| mutex_init(&d->data_mutex); |
| mutex_init(&d->usb_mutex); |
| mutex_init(&d->i2c_mutex); |
| |
| d->state = DVB_USB_STATE_INIT; |
| |
| if (d->props.size_of_priv > 0) { |
| d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL); |
| if (d->priv == NULL) { |
| err("no memory for priv in 'struct dvb_usb_device'"); |
| return -ENOMEM; |
| } |
| |
| if (d->props.priv_init != NULL) { |
| ret = d->props.priv_init(d); |
| if (ret != 0) |
| goto err_priv_init; |
| } |
| } |
| |
| /* check the capabilities and set appropriate variables */ |
| dvb_usb_device_power_ctrl(d, 1); |
| |
| ret = dvb_usb_i2c_init(d); |
| if (ret) |
| goto err_i2c_init; |
| ret = dvb_usb_adapter_init(d, adapter_nums); |
| if (ret) |
| goto err_adapter_init; |
| |
| if ((ret = dvb_usb_remote_init(d))) |
| err("could not initialize remote control."); |
| |
| dvb_usb_device_power_ctrl(d, 0); |
| |
| return 0; |
| |
| err_adapter_init: |
| dvb_usb_adapter_exit(d); |
| dvb_usb_i2c_exit(d); |
| err_i2c_init: |
| if (d->priv && d->props.priv_destroy) |
| d->props.priv_destroy(d); |
| err_priv_init: |
| kfree(d->priv); |
| d->priv = NULL; |
| return ret; |
| } |
| |
| /* determine the name and the state of the just found USB device */ |
| static const struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, const struct dvb_usb_device_properties *props, int *cold) |
| { |
| int i, j; |
| const struct dvb_usb_device_description *desc = NULL; |
| |
| *cold = -1; |
| |
| for (i = 0; i < props->num_device_descs; i++) { |
| |
| for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) { |
| deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct); |
| if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && |
| props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { |
| *cold = 1; |
| desc = &props->devices[i]; |
| break; |
| } |
| } |
| |
| if (desc != NULL) |
| break; |
| |
| for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) { |
| deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct); |
| if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && |
| props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { |
| *cold = 0; |
| desc = &props->devices[i]; |
| break; |
| } |
| } |
| } |
| |
| if (desc != NULL && props->identify_state != NULL) |
| props->identify_state(udev, props, &desc, cold); |
| |
| return desc; |
| } |
| |
| int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff) |
| { |
| if (onoff) |
| d->powered++; |
| else |
| d->powered--; |
| |
| if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */ |
| deb_info("power control: %d\n", onoff); |
| if (d->props.power_ctrl) |
| return d->props.power_ctrl(d, onoff); |
| } |
| return 0; |
| } |
| |
| /* |
| * USB |
| */ |
| int dvb_usb_device_init(struct usb_interface *intf, |
| const struct dvb_usb_device_properties *props, |
| struct module *owner, struct dvb_usb_device **du, |
| short *adapter_nums) |
| { |
| struct usb_device *udev = interface_to_usbdev(intf); |
| struct dvb_usb_device *d = NULL; |
| const struct dvb_usb_device_description *desc = NULL; |
| |
| int ret = -ENOMEM, cold = 0; |
| |
| if (du != NULL) |
| *du = NULL; |
| |
| d = kzalloc(sizeof(*d), GFP_KERNEL); |
| if (!d) { |
| err("no memory for 'struct dvb_usb_device'"); |
| return -ENOMEM; |
| } |
| |
| memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties)); |
| |
| desc = dvb_usb_find_device(udev, &d->props, &cold); |
| if (!desc) { |
| deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n"); |
| ret = -ENODEV; |
| goto error; |
| } |
| |
| if (cold) { |
| info("found a '%s' in cold state, will try to load a firmware", desc->name); |
| ret = dvb_usb_download_firmware(udev, props); |
| if (!props->no_reconnect || ret != 0) |
| goto error; |
| } |
| |
| info("found a '%s' in warm state.", desc->name); |
| d->udev = udev; |
| d->desc = desc; |
| d->owner = owner; |
| |
| usb_set_intfdata(intf, d); |
| |
| ret = dvb_usb_init(d, adapter_nums); |
| if (ret) { |
| info("%s error while loading driver (%d)", desc->name, ret); |
| goto error; |
| } |
| |
| if (du) |
| *du = d; |
| |
| info("%s successfully initialized and connected.", desc->name); |
| return 0; |
| |
| error: |
| usb_set_intfdata(intf, NULL); |
| kfree(d); |
| return ret; |
| } |
| EXPORT_SYMBOL(dvb_usb_device_init); |
| |
| void dvb_usb_device_exit(struct usb_interface *intf) |
| { |
| struct dvb_usb_device *d = usb_get_intfdata(intf); |
| const char *default_name = "generic DVB-USB module"; |
| char name[40]; |
| |
| usb_set_intfdata(intf, NULL); |
| if (d != NULL && d->desc != NULL) { |
| strscpy(name, d->desc->name, sizeof(name)); |
| dvb_usb_exit(d); |
| } else { |
| strscpy(name, default_name, sizeof(name)); |
| } |
| info("%s successfully deinitialized and disconnected.", name); |
| |
| } |
| EXPORT_SYMBOL(dvb_usb_device_exit); |
| |
| MODULE_VERSION("1.0"); |
| MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>"); |
| MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); |
| MODULE_LICENSE("GPL"); |