1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * DVB USB library - provides a generic interface for a DVB USB device driver. 4 * 5 * dvb-usb-init.c 6 * 7 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de) 8 * 9 * see Documentation/media/dvb-drivers/dvb-usb.rst for more information 10 */ 11 #include "dvb-usb-common.h" 12 13 /* debug */ 14 int dvb_usb_debug; 15 module_param_named(debug, dvb_usb_debug, int, 0644); 16 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); 17 18 int dvb_usb_disable_rc_polling; 19 module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644); 20 MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0)."); 21 22 static int dvb_usb_force_pid_filter_usage; 23 module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444); 24 MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0)."); 25 26 static 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 if ((ret = dvb_usb_adapter_stream_init(adap)) || 83 (ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs)) || 84 (ret = dvb_usb_adapter_frontend_init(adap))) { 85 return ret; 86 } 87 88 /* use exclusive FE lock if there is multiple shared FEs */ 89 if (adap->fe_adap[1].fe) 90 adap->dvb_adap.mfe_shared = 1; 91 92 d->num_adapters_initialized++; 93 d->state |= DVB_USB_STATE_DVB; 94 } 95 96 /* 97 * when reloading the driver w/o replugging the device 98 * sometimes a timeout occurs, this helps 99 */ 100 if (d->props.generic_bulk_ctrl_endpoint != 0) { 101 usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint)); 102 usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint)); 103 } 104 105 return 0; 106 } 107 108 static int dvb_usb_adapter_exit(struct dvb_usb_device *d) 109 { 110 int n; 111 112 for (n = 0; n < d->num_adapters_initialized; n++) { 113 dvb_usb_adapter_frontend_exit(&d->adapter[n]); 114 dvb_usb_adapter_dvb_exit(&d->adapter[n]); 115 dvb_usb_adapter_stream_exit(&d->adapter[n]); 116 kfree(d->adapter[n].priv); 117 } 118 d->num_adapters_initialized = 0; 119 d->state &= ~DVB_USB_STATE_DVB; 120 return 0; 121 } 122 123 124 /* general initialization functions */ 125 static int dvb_usb_exit(struct dvb_usb_device *d) 126 { 127 deb_info("state before exiting everything: %x\n", d->state); 128 dvb_usb_remote_exit(d); 129 dvb_usb_adapter_exit(d); 130 dvb_usb_i2c_exit(d); 131 deb_info("state should be zero now: %x\n", d->state); 132 d->state = DVB_USB_STATE_INIT; 133 kfree(d->priv); 134 kfree(d); 135 return 0; 136 } 137 138 static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums) 139 { 140 int ret = 0; 141 142 mutex_init(&d->data_mutex); 143 mutex_init(&d->usb_mutex); 144 mutex_init(&d->i2c_mutex); 145 146 d->state = DVB_USB_STATE_INIT; 147 148 if (d->props.size_of_priv > 0) { 149 d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL); 150 if (d->priv == NULL) { 151 err("no memory for priv in 'struct dvb_usb_device'"); 152 return -ENOMEM; 153 } 154 } 155 156 /* check the capabilities and set appropriate variables */ 157 dvb_usb_device_power_ctrl(d, 1); 158 159 if ((ret = dvb_usb_i2c_init(d)) || 160 (ret = dvb_usb_adapter_init(d, adapter_nums))) { 161 dvb_usb_exit(d); 162 return ret; 163 } 164 165 if ((ret = dvb_usb_remote_init(d))) 166 err("could not initialize remote control."); 167 168 dvb_usb_device_power_ctrl(d, 0); 169 170 return 0; 171 } 172 173 /* determine the name and the state of the just found USB device */ 174 static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold) 175 { 176 int i, j; 177 struct dvb_usb_device_description *desc = NULL; 178 179 *cold = -1; 180 181 for (i = 0; i < props->num_device_descs; i++) { 182 183 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) { 184 deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct); 185 if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 186 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 187 *cold = 1; 188 desc = &props->devices[i]; 189 break; 190 } 191 } 192 193 if (desc != NULL) 194 break; 195 196 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) { 197 deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct); 198 if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 199 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 200 *cold = 0; 201 desc = &props->devices[i]; 202 break; 203 } 204 } 205 } 206 207 if (desc != NULL && props->identify_state != NULL) 208 props->identify_state(udev, props, &desc, cold); 209 210 return desc; 211 } 212 213 int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff) 214 { 215 if (onoff) 216 d->powered++; 217 else 218 d->powered--; 219 220 if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */ 221 deb_info("power control: %d\n", onoff); 222 if (d->props.power_ctrl) 223 return d->props.power_ctrl(d, onoff); 224 } 225 return 0; 226 } 227 228 /* 229 * USB 230 */ 231 int dvb_usb_device_init(struct usb_interface *intf, 232 struct dvb_usb_device_properties *props, 233 struct module *owner, struct dvb_usb_device **du, 234 short *adapter_nums) 235 { 236 struct usb_device *udev = interface_to_usbdev(intf); 237 struct dvb_usb_device *d = NULL; 238 struct dvb_usb_device_description *desc = NULL; 239 240 int ret = -ENOMEM, cold = 0; 241 242 if (du != NULL) 243 *du = NULL; 244 245 if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) { 246 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n"); 247 return -ENODEV; 248 } 249 250 if (cold) { 251 info("found a '%s' in cold state, will try to load a firmware", desc->name); 252 ret = dvb_usb_download_firmware(udev, props); 253 if (!props->no_reconnect || ret != 0) 254 return ret; 255 } 256 257 info("found a '%s' in warm state.", desc->name); 258 d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL); 259 if (d == NULL) { 260 err("no memory for 'struct dvb_usb_device'"); 261 return -ENOMEM; 262 } 263 264 d->udev = udev; 265 memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties)); 266 d->desc = desc; 267 d->owner = owner; 268 269 usb_set_intfdata(intf, d); 270 271 if (du != NULL) 272 *du = d; 273 274 ret = dvb_usb_init(d, adapter_nums); 275 276 if (ret == 0) 277 info("%s successfully initialized and connected.", desc->name); 278 else 279 info("%s error while loading driver (%d)", desc->name, ret); 280 return ret; 281 } 282 EXPORT_SYMBOL(dvb_usb_device_init); 283 284 void dvb_usb_device_exit(struct usb_interface *intf) 285 { 286 struct dvb_usb_device *d = usb_get_intfdata(intf); 287 const char *name = "generic DVB-USB module"; 288 289 usb_set_intfdata(intf, NULL); 290 if (d != NULL && d->desc != NULL) { 291 name = d->desc->name; 292 dvb_usb_exit(d); 293 } 294 info("%s successfully deinitialized and disconnected.", name); 295 296 } 297 EXPORT_SYMBOL(dvb_usb_device_exit); 298 299 MODULE_VERSION("1.0"); 300 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>"); 301 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); 302 MODULE_LICENSE("GPL"); 303