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@posteo.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 */ 17 int dvb_usb_debug; 18 module_param_named(debug, dvb_usb_debug, int, 0644); 19 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); 20 21 int dvb_usb_disable_rc_polling; 22 module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644); 23 MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0)."); 24 25 static int dvb_usb_force_pid_filter_usage; 26 module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444); 27 MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0)."); 28 29 static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs) 30 { 31 struct dvb_usb_adapter *adap; 32 int ret, n, o; 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 for (o = 0; o < adap->props.num_frontends; o++) { 42 struct dvb_usb_adapter_fe_properties *props = &adap->props.fe[o]; 43 /* speed - when running at FULL speed we need a HW PID filter */ 44 if (d->udev->speed == USB_SPEED_FULL && !(props->caps & DVB_USB_ADAP_HAS_PID_FILTER)) { 45 err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)"); 46 return -ENODEV; 47 } 48 49 if ((d->udev->speed == USB_SPEED_FULL && props->caps & DVB_USB_ADAP_HAS_PID_FILTER) || 50 (props->caps & DVB_USB_ADAP_NEED_PID_FILTERING)) { 51 info("will use the device's hardware PID filter (table count: %d).", props->pid_filter_count); 52 adap->fe_adap[o].pid_filtering = 1; 53 adap->fe_adap[o].max_feed_count = props->pid_filter_count; 54 } else { 55 info("will pass the complete MPEG2 transport stream to the software demuxer."); 56 adap->fe_adap[o].pid_filtering = 0; 57 adap->fe_adap[o].max_feed_count = 255; 58 } 59 60 if (!adap->fe_adap[o].pid_filtering && 61 dvb_usb_force_pid_filter_usage && 62 props->caps & DVB_USB_ADAP_HAS_PID_FILTER) { 63 info("pid filter enabled by module option."); 64 adap->fe_adap[o].pid_filtering = 1; 65 adap->fe_adap[o].max_feed_count = props->pid_filter_count; 66 } 67 68 if (props->size_of_priv > 0) { 69 adap->fe_adap[o].priv = kzalloc(props->size_of_priv, GFP_KERNEL); 70 if (adap->fe_adap[o].priv == NULL) { 71 err("no memory for priv for adapter %d fe %d.", n, o); 72 return -ENOMEM; 73 } 74 } 75 } 76 77 if (adap->props.size_of_priv > 0) { 78 adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL); 79 if (adap->priv == NULL) { 80 err("no memory for priv for adapter %d.", n); 81 return -ENOMEM; 82 } 83 } 84 85 if ((ret = dvb_usb_adapter_stream_init(adap)) || 86 (ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs)) || 87 (ret = dvb_usb_adapter_frontend_init(adap))) { 88 return ret; 89 } 90 91 /* use exclusive FE lock if there is multiple shared FEs */ 92 if (adap->fe_adap[1].fe) 93 adap->dvb_adap.mfe_shared = 1; 94 95 d->num_adapters_initialized++; 96 d->state |= DVB_USB_STATE_DVB; 97 } 98 99 /* 100 * when reloading the driver w/o replugging the device 101 * sometimes a timeout occures, this helps 102 */ 103 if (d->props.generic_bulk_ctrl_endpoint != 0) { 104 usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint)); 105 usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint)); 106 } 107 108 return 0; 109 } 110 111 static int dvb_usb_adapter_exit(struct dvb_usb_device *d) 112 { 113 int n; 114 115 for (n = 0; n < d->num_adapters_initialized; n++) { 116 dvb_usb_adapter_frontend_exit(&d->adapter[n]); 117 dvb_usb_adapter_dvb_exit(&d->adapter[n]); 118 dvb_usb_adapter_stream_exit(&d->adapter[n]); 119 kfree(d->adapter[n].priv); 120 } 121 d->num_adapters_initialized = 0; 122 d->state &= ~DVB_USB_STATE_DVB; 123 return 0; 124 } 125 126 127 /* general initialization functions */ 128 static int dvb_usb_exit(struct dvb_usb_device *d) 129 { 130 deb_info("state before exiting everything: %x\n", d->state); 131 dvb_usb_remote_exit(d); 132 dvb_usb_adapter_exit(d); 133 dvb_usb_i2c_exit(d); 134 deb_info("state should be zero now: %x\n", d->state); 135 d->state = DVB_USB_STATE_INIT; 136 kfree(d->priv); 137 kfree(d); 138 return 0; 139 } 140 141 static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums) 142 { 143 int ret = 0; 144 145 mutex_init(&d->data_mutex); 146 mutex_init(&d->usb_mutex); 147 mutex_init(&d->i2c_mutex); 148 149 d->state = DVB_USB_STATE_INIT; 150 151 if (d->props.size_of_priv > 0) { 152 d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL); 153 if (d->priv == NULL) { 154 err("no memory for priv in 'struct dvb_usb_device'"); 155 return -ENOMEM; 156 } 157 } 158 159 /* check the capabilities and set appropriate variables */ 160 dvb_usb_device_power_ctrl(d, 1); 161 162 if ((ret = dvb_usb_i2c_init(d)) || 163 (ret = dvb_usb_adapter_init(d, adapter_nums))) { 164 dvb_usb_exit(d); 165 return ret; 166 } 167 168 if ((ret = dvb_usb_remote_init(d))) 169 err("could not initialize remote control."); 170 171 dvb_usb_device_power_ctrl(d, 0); 172 173 return 0; 174 } 175 176 /* determine the name and the state of the just found USB device */ 177 static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold) 178 { 179 int i, j; 180 struct dvb_usb_device_description *desc = NULL; 181 182 *cold = -1; 183 184 for (i = 0; i < props->num_device_descs; i++) { 185 186 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) { 187 deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct); 188 if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 189 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 190 *cold = 1; 191 desc = &props->devices[i]; 192 break; 193 } 194 } 195 196 if (desc != NULL) 197 break; 198 199 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) { 200 deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct); 201 if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 202 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 203 *cold = 0; 204 desc = &props->devices[i]; 205 break; 206 } 207 } 208 } 209 210 if (desc != NULL && props->identify_state != NULL) 211 props->identify_state(udev, props, &desc, cold); 212 213 return desc; 214 } 215 216 int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff) 217 { 218 if (onoff) 219 d->powered++; 220 else 221 d->powered--; 222 223 if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */ 224 deb_info("power control: %d\n", onoff); 225 if (d->props.power_ctrl) 226 return d->props.power_ctrl(d, onoff); 227 } 228 return 0; 229 } 230 231 /* 232 * USB 233 */ 234 int dvb_usb_device_init(struct usb_interface *intf, 235 struct dvb_usb_device_properties *props, 236 struct module *owner, struct dvb_usb_device **du, 237 short *adapter_nums) 238 { 239 struct usb_device *udev = interface_to_usbdev(intf); 240 struct dvb_usb_device *d = NULL; 241 struct dvb_usb_device_description *desc = NULL; 242 243 int ret = -ENOMEM, cold = 0; 244 245 if (du != NULL) 246 *du = NULL; 247 248 if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) { 249 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n"); 250 return -ENODEV; 251 } 252 253 if (cold) { 254 info("found a '%s' in cold state, will try to load a firmware", desc->name); 255 ret = dvb_usb_download_firmware(udev, props); 256 if (!props->no_reconnect || ret != 0) 257 return ret; 258 } 259 260 info("found a '%s' in warm state.", desc->name); 261 d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL); 262 if (d == NULL) { 263 err("no memory for 'struct dvb_usb_device'"); 264 return -ENOMEM; 265 } 266 267 d->udev = udev; 268 memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties)); 269 d->desc = desc; 270 d->owner = owner; 271 272 usb_set_intfdata(intf, d); 273 274 if (du != NULL) 275 *du = d; 276 277 ret = dvb_usb_init(d, adapter_nums); 278 279 if (ret == 0) 280 info("%s successfully initialized and connected.", desc->name); 281 else 282 info("%s error while loading driver (%d)", desc->name, ret); 283 return ret; 284 } 285 EXPORT_SYMBOL(dvb_usb_device_init); 286 287 void dvb_usb_device_exit(struct usb_interface *intf) 288 { 289 struct dvb_usb_device *d = usb_get_intfdata(intf); 290 const char *name = "generic DVB-USB module"; 291 292 usb_set_intfdata(intf, NULL); 293 if (d != NULL && d->desc != NULL) { 294 name = d->desc->name; 295 dvb_usb_exit(d); 296 } 297 info("%s successfully deinitialized and disconnected.", name); 298 299 } 300 EXPORT_SYMBOL(dvb_usb_device_exit); 301 302 MODULE_VERSION("1.0"); 303 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>"); 304 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); 305 MODULE_LICENSE("GPL"); 306