drivers/media/dvb/dvb-usb/dvb-usb-init.c

   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) 2004-5 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 */
  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 (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 /* general initialization functions */
  26 static int dvb_usb_exit(struct dvb_usb_device *d)
  27 {
  28         deb_info("state before exiting everything: %x\n",d->state);
  29         dvb_usb_remote_exit(d);
  30         dvb_usb_fe_exit(d);
  31         dvb_usb_i2c_exit(d);
  32         dvb_usb_dvb_exit(d);
  33         dvb_usb_urb_exit(d);
  34         deb_info("state should be zero now: %x\n",d->state);
  35         d->state = DVB_USB_STATE_INIT;
  36         kfree(d->priv);
  37         kfree(d);
  38         return 0;
  39 }
  40
  41 static int dvb_usb_init(struct dvb_usb_device *d)
  42 {
  43         int ret = 0;
  44
  45         mutex_init(&d->usb_mutex);
  46         mutex_init(&d->i2c_mutex);
  47
  48         d->state = DVB_USB_STATE_INIT;
  49
  50 /* check the capabilities and set appropriate variables */
  51
  52 /* speed - when running at FULL speed we need a HW PID filter */
  53         if (d->udev->speed == USB_SPEED_FULL && !(d->props.caps & DVB_USB_HAS_PID_FILTER)) {
  54                 err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
  55                 return -ENODEV;
  56         }
  57
  58         if ((d->udev->speed == USB_SPEED_FULL && d->props.caps & DVB_USB_HAS_PID_FILTER) ||
  59                 (d->props.caps & DVB_USB_NEED_PID_FILTERING)) {
  60                 info("will use the device's hardware PID filter (table count: %d).",d->props.pid_filter_count);
  61                 d->pid_filtering = 1;
  62                 d->max_feed_count = d->props.pid_filter_count;
  63         } else {
  64                 info("will pass the complete MPEG2 transport stream to the software demuxer.");
  65                 d->pid_filtering = 0;
  66                 d->max_feed_count = 255;
  67         }
  68
  69         if (d->props.power_ctrl)
  70                 d->props.power_ctrl(d,1);
  71
  72         if ((ret = dvb_usb_urb_init(d)) ||
  73                 (ret = dvb_usb_dvb_init(d)) ||
  74                 (ret = dvb_usb_i2c_init(d)) ||
  75                 (ret = dvb_usb_fe_init(d))) {
  76                 dvb_usb_exit(d);
  77                 return ret;
  78         }
  79
  80         if ((ret = dvb_usb_remote_init(d)))
  81                 err("could not initialize remote control.");
  82
  83         if (d->props.power_ctrl)
  84                 d->props.power_ctrl(d,0);
  85
  86         return 0;
  87 }
  88
  89 /* determine the name and the state of the just found USB device */
  90 static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_properties *props, int *cold)
  91 {
  92         int i,j;
  93         struct dvb_usb_device_description *desc = NULL;
  94         *cold = -1;
  95
  96         for (i = 0; i < props->num_device_descs; i++) {
  97
  98                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
  99                         deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
 100                         if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
 101                                 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 102                                 *cold = 1;
 103                                 desc = &props->devices[i];
 104                                 break;
 105                         }
 106                 }
 107
 108                 if (desc != NULL)
 109                         break;
 110
 111                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
 112                         deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
 113                         if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
 114                                 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 115                                 *cold = 0;
 116                                 desc = &props->devices[i];
 117                                 break;
 118                         }
 119                 }
 120         }
 121
 122         if (desc != NULL && props->identify_state != NULL)
 123                 props->identify_state(udev,props,&desc,cold);
 124
 125         return desc;
 126 }
 127
 128 /*
 129  * USB
 130  */
 131
 132 int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties
 133                 *props, struct module *owner,struct dvb_usb_device **du)
 134 {
 135         struct usb_device *udev = interface_to_usbdev(intf);
 136         struct dvb_usb_device *d = NULL;
 137         struct dvb_usb_device_description *desc = NULL;
 138
 139         int ret = -ENOMEM,cold=0;
 140
 141         if (du != NULL)
 142                 *du = NULL;
 143
 144         if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) {
 145                 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
 146                 return -ENODEV;
 147         }
 148
 149         if (cold) {
 150                 info("found a '%s' in cold state, will try to load a firmware",desc->name);
 151                 ret = dvb_usb_download_firmware(udev,props);
 152                 if (!props->no_reconnect)
 153                         return ret;
 154         }
 155
 156         info("found a '%s' in warm state.",desc->name);
 157                 d = kzalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
 158         if (d == NULL) {
 159                 err("no memory for 'struct dvb_usb_device'");
 160                 return ret;
 161         }
 162
 163         d->udev = udev;
 164         memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
 165         d->desc = desc;
 166         d->owner = owner;
 167
 168         if (d->props.size_of_priv > 0) {
 169                         d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL);
 170                 if (d->priv == NULL) {
 171                         err("no memory for priv in 'struct dvb_usb_device'");
 172                         kfree(d);
 173                         return -ENOMEM;
 174                 }
 175         }
 176
 177         usb_set_intfdata(intf, d);
 178
 179         if (du != NULL)
 180                 *du = d;
 181
 182         ret = dvb_usb_init(d);
 183
 184         if (ret == 0)
 185                 info("%s successfully initialized and connected.",desc->name);
 186         else
 187                 info("%s error while loading driver (%d)",desc->name,ret);
 188         return ret;
 189 }
 190 EXPORT_SYMBOL(dvb_usb_device_init);
 191
 192 void dvb_usb_device_exit(struct usb_interface *intf)
 193 {
 194         struct dvb_usb_device *d = usb_get_intfdata(intf);
 195         const char *name = "generic DVB-USB module";
 196
 197         usb_set_intfdata(intf,NULL);
 198         if (d != NULL && d->desc != NULL) {
 199                 name = d->desc->name;
 200                 dvb_usb_exit(d);
 201         }
 202         info("%s successfully deinitialized and disconnected.",name);
 203
 204 }
 205 EXPORT_SYMBOL(dvb_usb_device_exit);
 206
 207 MODULE_VERSION("0.3");
 208 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 209 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
 210 MODULE_LICENSE("GPL");