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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * DVB USB library - provides a generic interface for a DVB USB device driver.4 *5 * dvb-usb-init.c6 *7 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)8 *9 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information10 */11#include "dvb-usb-common.h"12 13/* debug */14int dvb_usb_debug;15module_param_named(debug, dvb_usb_debug, int, 0644);16MODULE_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);17 18int dvb_usb_disable_rc_polling;19module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);20MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");21 22static int dvb_usb_force_pid_filter_usage;23module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);24MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");25 26static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)27{28 struct dvb_usb_adapter *adap;29 int ret, n, o;30 31 for (n = 0; n < d->props.num_adapters; n++) {32 adap = &d->adapter[n];33 adap->dev = d;34 adap->id = n;35 36 memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties));37 38 for (o = 0; o < adap->props.num_frontends; o++) {39 struct dvb_usb_adapter_fe_properties *props = &adap->props.fe[o];40 /* speed - when running at FULL speed we need a HW PID filter */41 if (d->udev->speed == USB_SPEED_FULL && !(props->caps & DVB_USB_ADAP_HAS_PID_FILTER)) {42 err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");43 return -ENODEV;44 }45 46 if ((d->udev->speed == USB_SPEED_FULL && props->caps & DVB_USB_ADAP_HAS_PID_FILTER) ||47 (props->caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {48 info("will use the device's hardware PID filter (table count: %d).", props->pid_filter_count);49 adap->fe_adap[o].pid_filtering = 1;50 adap->fe_adap[o].max_feed_count = props->pid_filter_count;51 } else {52 info("will pass the complete MPEG2 transport stream to the software demuxer.");53 adap->fe_adap[o].pid_filtering = 0;54 adap->fe_adap[o].max_feed_count = 255;55 }56 57 if (!adap->fe_adap[o].pid_filtering &&58 dvb_usb_force_pid_filter_usage &&59 props->caps & DVB_USB_ADAP_HAS_PID_FILTER) {60 info("pid filter enabled by module option.");61 adap->fe_adap[o].pid_filtering = 1;62 adap->fe_adap[o].max_feed_count = props->pid_filter_count;63 }64 65 if (props->size_of_priv > 0) {66 adap->fe_adap[o].priv = kzalloc(props->size_of_priv, GFP_KERNEL);67 if (adap->fe_adap[o].priv == NULL) {68 err("no memory for priv for adapter %d fe %d.", n, o);69 return -ENOMEM;70 }71 }72 }73 74 if (adap->props.size_of_priv > 0) {75 adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL);76 if (adap->priv == NULL) {77 err("no memory for priv for adapter %d.", n);78 return -ENOMEM;79 }80 }81 82 ret = dvb_usb_adapter_stream_init(adap);83 if (ret)84 goto stream_init_err;85 86 ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs);87 if (ret)88 goto dvb_init_err;89 90 ret = dvb_usb_adapter_frontend_init(adap);91 if (ret)92 goto frontend_init_err;93 94 /* use exclusive FE lock if there is multiple shared FEs */95 if (adap->fe_adap[1].fe && adap->dvb_adap.mfe_shared < 1)96 adap->dvb_adap.mfe_shared = 1;97 98 d->num_adapters_initialized++;99 d->state |= DVB_USB_STATE_DVB;100 }101 102 /*103 * when reloading the driver w/o replugging the device104 * sometimes a timeout occurs, this helps105 */106 if (d->props.generic_bulk_ctrl_endpoint != 0) {107 usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));108 usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));109 }110 111 return 0;112 113frontend_init_err:114 dvb_usb_adapter_dvb_exit(adap);115dvb_init_err:116 dvb_usb_adapter_stream_exit(adap);117stream_init_err:118 kfree(adap->priv);119 return ret;120}121 122static int dvb_usb_adapter_exit(struct dvb_usb_device *d)123{124 int n;125 126 for (n = 0; n < d->num_adapters_initialized; n++) {127 dvb_usb_adapter_frontend_exit(&d->adapter[n]);128 dvb_usb_adapter_dvb_exit(&d->adapter[n]);129 dvb_usb_adapter_stream_exit(&d->adapter[n]);130 kfree(d->adapter[n].priv);131 }132 d->num_adapters_initialized = 0;133 d->state &= ~DVB_USB_STATE_DVB;134 return 0;135}136 137 138/* general initialization functions */139static int dvb_usb_exit(struct dvb_usb_device *d)140{141 deb_info("state before exiting everything: %x\n", d->state);142 dvb_usb_remote_exit(d);143 dvb_usb_adapter_exit(d);144 dvb_usb_i2c_exit(d);145 deb_info("state should be zero now: %x\n", d->state);146 d->state = DVB_USB_STATE_INIT;147 148 if (d->priv != NULL && d->props.priv_destroy != NULL)149 d->props.priv_destroy(d);150 151 kfree(d->priv);152 kfree(d);153 return 0;154}155 156static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums)157{158 int ret = 0;159 160 mutex_init(&d->data_mutex);161 mutex_init(&d->usb_mutex);162 mutex_init(&d->i2c_mutex);163 164 d->state = DVB_USB_STATE_INIT;165 166 if (d->props.size_of_priv > 0) {167 d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);168 if (d->priv == NULL) {169 err("no memory for priv in 'struct dvb_usb_device'");170 return -ENOMEM;171 }172 173 if (d->props.priv_init != NULL) {174 ret = d->props.priv_init(d);175 if (ret != 0)176 goto err_priv_init;177 }178 }179 180 /* check the capabilities and set appropriate variables */181 dvb_usb_device_power_ctrl(d, 1);182 183 ret = dvb_usb_i2c_init(d);184 if (ret)185 goto err_i2c_init;186 ret = dvb_usb_adapter_init(d, adapter_nums);187 if (ret)188 goto err_adapter_init;189 190 if ((ret = dvb_usb_remote_init(d)))191 err("could not initialize remote control.");192 193 dvb_usb_device_power_ctrl(d, 0);194 195 return 0;196 197err_adapter_init:198 dvb_usb_adapter_exit(d);199 dvb_usb_i2c_exit(d);200err_i2c_init:201 if (d->priv && d->props.priv_destroy)202 d->props.priv_destroy(d);203err_priv_init:204 kfree(d->priv);205 d->priv = NULL;206 return ret;207}208 209/* determine the name and the state of the just found USB device */210static const struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, const struct dvb_usb_device_properties *props, int *cold)211{212 int i, j;213 const struct dvb_usb_device_description *desc = NULL;214 215 *cold = -1;216 217 for (i = 0; i < props->num_device_descs; i++) {218 219 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {220 deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);221 if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&222 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {223 *cold = 1;224 desc = &props->devices[i];225 break;226 }227 }228 229 if (desc != NULL)230 break;231 232 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {233 deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);234 if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&235 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {236 *cold = 0;237 desc = &props->devices[i];238 break;239 }240 }241 }242 243 if (desc != NULL && props->identify_state != NULL)244 props->identify_state(udev, props, &desc, cold);245 246 return desc;247}248 249int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)250{251 if (onoff)252 d->powered++;253 else254 d->powered--;255 256 if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */257 deb_info("power control: %d\n", onoff);258 if (d->props.power_ctrl)259 return d->props.power_ctrl(d, onoff);260 }261 return 0;262}263 264/*265 * USB266 */267int dvb_usb_device_init(struct usb_interface *intf,268 const struct dvb_usb_device_properties *props,269 struct module *owner, struct dvb_usb_device **du,270 short *adapter_nums)271{272 struct usb_device *udev = interface_to_usbdev(intf);273 struct dvb_usb_device *d = NULL;274 const struct dvb_usb_device_description *desc = NULL;275 276 int ret = -ENOMEM, cold = 0;277 278 if (du != NULL)279 *du = NULL;280 281 d = kzalloc(sizeof(*d), GFP_KERNEL);282 if (!d) {283 err("no memory for 'struct dvb_usb_device'");284 return -ENOMEM;285 }286 287 memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));288 289 desc = dvb_usb_find_device(udev, &d->props, &cold);290 if (!desc) {291 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");292 ret = -ENODEV;293 goto error;294 }295 296 if (cold) {297 info("found a '%s' in cold state, will try to load a firmware", desc->name);298 ret = dvb_usb_download_firmware(udev, props);299 if (!props->no_reconnect || ret != 0)300 goto error;301 }302 303 info("found a '%s' in warm state.", desc->name);304 d->udev = udev;305 d->desc = desc;306 d->owner = owner;307 308 usb_set_intfdata(intf, d);309 310 ret = dvb_usb_init(d, adapter_nums);311 if (ret) {312 info("%s error while loading driver (%d)", desc->name, ret);313 goto error;314 }315 316 if (du)317 *du = d;318 319 info("%s successfully initialized and connected.", desc->name);320 return 0;321 322 error:323 usb_set_intfdata(intf, NULL);324 kfree(d);325 return ret;326}327EXPORT_SYMBOL(dvb_usb_device_init);328 329void dvb_usb_device_exit(struct usb_interface *intf)330{331 struct dvb_usb_device *d = usb_get_intfdata(intf);332 const char *default_name = "generic DVB-USB module";333 char name[40];334 335 usb_set_intfdata(intf, NULL);336 if (d != NULL && d->desc != NULL) {337 strscpy(name, d->desc->name, sizeof(name));338 dvb_usb_exit(d);339 } else {340 strscpy(name, default_name, sizeof(name));341 }342 info("%s successfully deinitialized and disconnected.", name);343 344}345EXPORT_SYMBOL(dvb_usb_device_exit);346 347MODULE_VERSION("1.0");348MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");349MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");350MODULE_LICENSE("GPL");351