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(force_pid_filter_usage, "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, short *adapter_nrs) 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, adapter_nrs)) || 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; 99 100 for (n = 0; n < d->num_adapters_initialized; n++) { 101 dvb_usb_adapter_frontend_exit(&d->adapter[n]); 102 dvb_usb_adapter_dvb_exit(&d->adapter[n]); 103 dvb_usb_adapter_stream_exit(&d->adapter[n]); 104 kfree(d->adapter[n].priv); 105 } 106 d->num_adapters_initialized = 0; 107 d->state &= ~DVB_USB_STATE_DVB; 108 return 0; 109} 110 111 112/* general initialization functions */ 113static int dvb_usb_exit(struct dvb_usb_device *d) 114{ 115 deb_info("state before exiting everything: %x\n", d->state); 116 dvb_usb_remote_exit(d); 117 dvb_usb_adapter_exit(d); 118 dvb_usb_i2c_exit(d); 119 deb_info("state should be zero now: %x\n", d->state); 120 d->state = DVB_USB_STATE_INIT; 121 kfree(d->priv); 122 kfree(d); 123 return 0; 124} 125 126static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums) 127{ 128 int ret = 0; 129 130 mutex_init(&d->usb_mutex); 131 mutex_init(&d->i2c_mutex); 132 133 d->state = DVB_USB_STATE_INIT; 134 135 if (d->props.size_of_priv > 0) { 136 d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL); 137 if (d->priv == NULL) { 138 err("no memory for priv in 'struct dvb_usb_device'"); 139 return -ENOMEM; 140 } 141 } 142 143 /* check the capabilities and set appropriate variables */ 144 dvb_usb_device_power_ctrl(d, 1); 145 146 if ((ret = dvb_usb_i2c_init(d)) || 147 (ret = dvb_usb_adapter_init(d, adapter_nums))) { 148 dvb_usb_exit(d); 149 return ret; 150 } 151 152 if ((ret = dvb_usb_remote_init(d))) 153 err("could not initialize remote control."); 154 155 dvb_usb_device_power_ctrl(d, 0); 156 157 return 0; 158} 159 160/* determine the name and the state of the just found USB device */ 161static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold) 162{ 163 int i, j; 164 struct dvb_usb_device_description *desc = NULL; 165 166 *cold = -1; 167 168 for (i = 0; i < props->num_device_descs; i++) { 169 170 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) { 171 deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct); 172 if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 173 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 174 *cold = 1; 175 desc = &props->devices[i]; 176 break; 177 } 178 } 179 180 if (desc != NULL) 181 break; 182 183 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) { 184 deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct); 185 if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) && 186 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) { 187 *cold = 0; 188 desc = &props->devices[i]; 189 break; 190 } 191 } 192 } 193 194 if (desc != NULL && props->identify_state != NULL) 195 props->identify_state(udev, props, &desc, cold); 196 197 return desc; 198} 199 200int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff) 201{ 202 if (onoff) 203 d->powered++; 204 else 205 d->powered--; 206 207 if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */ 208 deb_info("power control: %d\n", onoff); 209 if (d->props.power_ctrl) 210 return d->props.power_ctrl(d, onoff); 211 } 212 return 0; 213} 214 215/* 216 * USB 217 */ 218int dvb_usb_device_init(struct usb_interface *intf, 219 struct dvb_usb_device_properties *props, 220 struct module *owner, struct dvb_usb_device **du, 221 short *adapter_nums) 222{ 223 struct usb_device *udev = interface_to_usbdev(intf); 224 struct dvb_usb_device *d = NULL; 225 struct dvb_usb_device_description *desc = NULL; 226 227 int ret = -ENOMEM, cold = 0; 228 229 if (du != NULL) 230 *du = NULL; 231 232 if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) { 233 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n"); 234 return -ENODEV; 235 } 236 237 if (cold) { 238 info("found a '%s' in cold state, will try to load a firmware", desc->name); 239 ret = dvb_usb_download_firmware(udev, props); 240 if (!props->no_reconnect || ret != 0) 241 return ret; 242 } 243 244 info("found a '%s' in warm state.", desc->name); 245 d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL); 246 if (d == NULL) { 247 err("no memory for 'struct dvb_usb_device'"); 248 return -ENOMEM; 249 } 250 251 d->udev = udev; 252 memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties)); 253 d->desc = desc; 254 d->owner = owner; 255 256 usb_set_intfdata(intf, d); 257 258 if (du != NULL) 259 *du = d; 260 261 ret = dvb_usb_init(d, adapter_nums); 262 263 if (ret == 0) 264 info("%s successfully initialized and connected.", desc->name); 265 else 266 info("%s error while loading driver (%d)", desc->name, ret); 267 return ret; 268} 269EXPORT_SYMBOL(dvb_usb_device_init); 270 271void dvb_usb_device_exit(struct usb_interface *intf) 272{ 273 struct dvb_usb_device *d = usb_get_intfdata(intf); 274 const char *name = "generic DVB-USB module"; 275 276 usb_set_intfdata(intf, NULL); 277 if (d != NULL && d->desc != NULL) { 278 name = d->desc->name; 279 dvb_usb_exit(d); 280 } 281 info("%s successfully deinitialized and disconnected.", name); 282 283} 284EXPORT_SYMBOL(dvb_usb_device_exit); 285 286MODULE_VERSION("1.0"); 287MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>"); 288MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices"); 289MODULE_LICENSE("GPL"); 290