1/* 2 * DVB USB library - provides a generic interface for a DVB USB device driver. 3 * 4 * dvb-usb-init.c 5 * 6 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de) 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the Free 10 * Software Foundation, version 2. 11 * 12 * see Documentation/dvb/README.dvb-usb for more information 13 */ 14#include "dvb-usb-common.h" 15 16/* debug */ 17int dvb_usb_debug; 18module_param_named(debug,dvb_usb_debug, int, 0644); 19MODULE_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); 20 21int dvb_usb_disable_rc_polling; 22module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644); 23MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0)."); 24 25static int dvb_usb_force_pid_filter_usage; 26module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444); 27MODULE_PARM_DESC(disable_rc_polling, "force all dvb-usb-devices to use a PID filter, if any (default: 0)."); 28 29static int dvb_usb_adapter_init(struct dvb_usb_device *d) 30{ 31 struct dvb_usb_adapter *adap; 32 int ret,n; 33 34 for (n = 0; n < d->props.num_adapters; n++) { 35 adap = &d->adapter[n]; 36 adap->dev = d; 37 adap->id = n; 38 39 memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties)); 40 41/* speed - when running at FULL speed we need a HW PID filter */ 42 if (d->udev->speed == USB_SPEED_FULL && !(adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER)) { 43 err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)"); 44 return -ENODEV; 45 } 46 47 if ((d->udev->speed == USB_SPEED_FULL && adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) || 48 (adap->props.caps & DVB_USB_ADAP_NEED_PID_FILTERING)) { 49 info("will use the device's hardware PID filter (table count: %d).",adap->props.pid_filter_count); 50 adap->pid_filtering = 1; 51 adap->max_feed_count = adap->props.pid_filter_count; 52 } else { 53 info("will pass the complete MPEG2 transport stream to the software demuxer."); 54 adap->pid_filtering = 0; 55 adap->max_feed_count = 255; 56 } 57 58 if (!adap->pid_filtering && 59 dvb_usb_force_pid_filter_usage && 60 adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) { 61 info("pid filter enabled by module option."); 62 adap->pid_filtering = 1; 63 adap->max_feed_count = adap->props.pid_filter_count; 64 } 65 66 if (adap->props.size_of_priv > 0) { 67 adap->priv = kzalloc(adap->props.size_of_priv,GFP_KERNEL); 68 if (adap->priv == NULL) { 69 err("no memory for priv for adapter %d.",n); 70 return -ENOMEM; 71 } 72 } 73 74 if ((ret = dvb_usb_adapter_stream_init(adap)) || 75 (ret = dvb_usb_adapter_dvb_init(adap)) || 76 (ret = dvb_usb_adapter_frontend_init(adap))) { 77 return ret; 78 } 79 80 d->num_adapters_initialized++; 81 d->state |= DVB_USB_STATE_DVB; 82 } 83 84 /* 85 * when reloading the driver w/o replugging the device 86 * sometimes a timeout occures, this helps 87 */ 88 if (d->props.generic_bulk_ctrl_endpoint != 0) { 89 usb_clear_halt(d->udev,usb_sndbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint)); 90 usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint)); 91 } 92 93 return 0; 94} 95 96static int dvb_usb_adapter_exit(struct dvb_usb_device *d) 97{ 98 int n; 99 for (n = 0; n < d->num_adapters_initialized; n++) { 100 dvb_usb_adapter_frontend_exit(&d->adapter[n]); 101 dvb_usb_adapter_dvb_exit(&d->adapter[n]); 102 dvb_usb_adapter_stream_exit(&d->adapter[n]); 103 kfree(d->adapter[n].priv); 104 } 105 d->num_adapters_initialized = 0; 106 d->state &= ~DVB_USB_STATE_DVB; 107 return 0; 108} 109 110 111/* general initialization functions */ 112static int dvb_usb_exit(struct dvb_usb_device *d) 113{ 114 deb_info("state before exiting everything: %x\n",d->state); 115 dvb_usb_remote_exit(d); 116 dvb_usb_adapter_exit(d); 117 dvb_usb_i2c_exit(d); 118 deb_info("state should be zero now: %x\n",d->state); 119 d->state = DVB_USB_STATE_INIT; 120 kfree(d->priv); 121 kfree(d); 122 return 0; 123} 124 125static int dvb_usb_init(struct dvb_usb_device *d) 126{ 127 int ret = 0; 128 129 mutex_init(&d->usb_mutex); 130 mutex_init(&d->i2c_mutex); 131 132 d->state = DVB_USB_STATE_INIT; 133 134 if (d->props.size_of_priv > 0) { 135 d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL); 136 if (d->priv == NULL) { 137 err("no memory for priv in 'struct dvb_usb_device'"); 138 return -ENOMEM; 139 } 140 } 141 142/* check the capabilities and set appropriate variables */ 143 dvb_usb_device_power_ctrl(d, 1); 144 145 if ((ret = dvb_usb_i2c_init(d)) || 146 (ret = dvb_usb_adapter_init(d))) { 147 dvb_usb_exit(d); 148 return ret; 149 } 150 151 if ((ret = dvb_usb_remote_init(d))) 152 err("could not initialize remote control."); 153 154 dvb_usb_device_power_ctrl(d, 0); 155 156 return 0; 157} 158 159/* determine the name and the state of the just found USB device */ 160static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_device_properties *props, int *cold) 161{ 162 int i,j; 163 struct dvb_usb_device_description *desc = NULL; 164 *cold = -1; 165 166 for (i = 0; i < props->num_device_descs; i++) { 167 168 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) { 169 deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct); 170 if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 171 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 172 *cold = 1; 173 desc = &props->devices[i]; 174 break; 175 } 176 } 177 178 if (desc != NULL) 179 break; 180 181 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) { 182 deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct); 183 if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 184 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 185 *cold = 0; 186 desc = &props->devices[i]; 187 break; 188 } 189 } 190 } 191 192 if (desc != NULL && props->identify_state != NULL) 193 props->identify_state(udev,props,&desc,cold); 194 195 return desc; 196} 197 198int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff) 199{ 200 if (onoff) 201 d->powered++; 202 else 203 d->powered--; 204 205 if (d->powered == 0 || (onoff && d->powered == 1)) { // when switching from 1 to 0 or from 0 to 1 206 deb_info("power control: %d\n", onoff); 207 if (d->props.power_ctrl) 208 return d->props.power_ctrl(d, onoff); 209 } 210 return 0; 211} 212 213/* 214 * USB 215 */ 216int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_device_properties 217 *props, struct module *owner,struct dvb_usb_device **du) 218{ 219 struct usb_device *udev = interface_to_usbdev(intf); 220 struct dvb_usb_device *d = NULL; 221 struct dvb_usb_device_description *desc = NULL; 222 223 int ret = -ENOMEM,cold=0; 224 225 if (du != NULL) 226 *du = NULL; 227 228 if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) { 229 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n"); 230 return -ENODEV; 231 } 232 233 if (cold) { 234 info("found a '%s' in cold state, will try to load a firmware",desc->name); 235 ret = dvb_usb_download_firmware(udev,props); 236 if (!props->no_reconnect || ret != 0) 237 return ret; 238 } 239 240 info("found a '%s' in warm state.",desc->name); 241 d = kzalloc(sizeof(struct dvb_usb_device),GFP_KERNEL); 242 if (d == NULL) { 243 err("no memory for 'struct dvb_usb_device'"); 244 return ret; 245 } 246 247 d->udev = udev; 248 memcpy(&d->props,props,sizeof(struct dvb_usb_device_properties)); 249 d->desc = desc; 250 d->owner = owner; 251 252 usb_set_intfdata(intf, d); 253 254 if (du != NULL) 255 *du = d; 256 257 ret = dvb_usb_init(d); 258 259 if (ret == 0) 260 info("%s successfully initialized and connected.",desc->name); 261 else 262 info("%s error while loading driver (%d)",desc->name,ret); 263 return ret; 264} 265EXPORT_SYMBOL(dvb_usb_device_init); 266 267void dvb_usb_device_exit(struct usb_interface *intf) 268{ 269 struct dvb_usb_device *d = usb_get_intfdata(intf); 270 const char *name = "generic DVB-USB module"; 271 272 usb_set_intfdata(intf,NULL); 273 if (d != NULL && d->desc != NULL) { 274 name = d->desc->name; 275 dvb_usb_exit(d); 276 } 277 info("%s successfully deinitialized and disconnected.",name); 278 279} 280EXPORT_SYMBOL(dvb_usb_device_exit); 281 282MODULE_VERSION("1.0"); 283MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>"); 284MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); 285MODULE_LICENSE("GPL"); 286