From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/media/usb/dvb-usb/dvb-usb-init.c | 304 +++++++++++++++++++++++++++++++ 1 file changed, 304 insertions(+) create mode 100644 drivers/media/usb/dvb-usb/dvb-usb-init.c (limited to 'drivers/media/usb/dvb-usb/dvb-usb-init.c') diff --git a/drivers/media/usb/dvb-usb/dvb-usb-init.c b/drivers/media/usb/dvb-usb/dvb-usb-init.c new file mode 100644 index 000000000..1adf32501 --- /dev/null +++ b/drivers/media/usb/dvb-usb/dvb-usb-init.c @@ -0,0 +1,304 @@ +/* + * 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@desy.de) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation, version 2. + * + * see Documentation/dvb/README.dvb-usb 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; + } + } + + if ((ret = dvb_usb_adapter_stream_init(adap)) || + (ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs)) || + (ret = dvb_usb_adapter_frontend_init(adap))) { + return ret; + } + + /* use exclusive FE lock if there is multiple shared FEs */ + if (adap->fe_adap[1].fe) + 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 occures, 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; +} + +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; + 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->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; + } + } + + /* check the capabilities and set appropriate variables */ + dvb_usb_device_power_ctrl(d, 1); + + if ((ret = dvb_usb_i2c_init(d)) || + (ret = dvb_usb_adapter_init(d, adapter_nums))) { + dvb_usb_exit(d); + return ret; + } + + if ((ret = dvb_usb_remote_init(d))) + err("could not initialize remote control."); + + dvb_usb_device_power_ctrl(d, 0); + + return 0; +} + +/* determine the name and the state of the just found USB device */ +static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold) +{ + int i, j; + 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, + 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; + struct dvb_usb_device_description *desc = NULL; + + int ret = -ENOMEM, cold = 0; + + if (du != NULL) + *du = NULL; + + if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) { + deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n"); + return -ENODEV; + } + + 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) + return ret; + } + + info("found a '%s' in warm state.", desc->name); + d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL); + if (d == NULL) { + err("no memory for 'struct dvb_usb_device'"); + return -ENOMEM; + } + + d->udev = udev; + memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties)); + d->desc = desc; + d->owner = owner; + + usb_set_intfdata(intf, d); + + if (du != NULL) + *du = d; + + ret = dvb_usb_init(d, adapter_nums); + + if (ret == 0) + info("%s successfully initialized and connected.", desc->name); + else + info("%s error while loading driver (%d)", desc->name, ret); + 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 *name = "generic DVB-USB module"; + + usb_set_intfdata(intf, NULL); + if (d != NULL && d->desc != NULL) { + name = d->desc->name; + dvb_usb_exit(d); + } + info("%s successfully deinitialized and disconnected.", name); + +} +EXPORT_SYMBOL(dvb_usb_device_exit); + +MODULE_VERSION("1.0"); +MODULE_AUTHOR("Patrick Boettcher "); +MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3-54-g00ecf