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 /* general initialization functions */
  22 int dvb_usb_exit(struct dvb_usb_device *d)
  23 {
  24         deb_info("state before exiting everything: %x\n",d->state);
  25         dvb_usb_remote_exit(d);
  26         dvb_usb_fe_exit(d);
  27         dvb_usb_i2c_exit(d);
  28         dvb_usb_dvb_exit(d);
  29         dvb_usb_urb_exit(d);
  30         deb_info("state should be zero now: %x\n",d->state);
  31         d->state = DVB_USB_STATE_INIT;
  32         kfree(d->priv);
  33         kfree(d);
  34         return 0;
  35 }
  36
  37 static int dvb_usb_init(struct dvb_usb_device *d)
  38 {
  39         int ret = 0;
  40
  41         sema_init(&d->usb_sem, 1);
  42         sema_init(&d->i2c_sem, 1);
  43
  44         d->state = DVB_USB_STATE_INIT;
  45
  46 /* check the capabilites and set appropriate variables */
  47
  48 /* speed - when running at FULL speed we need a HW PID filter */
  49         if (d->udev->speed == USB_SPEED_FULL && !(d->props.caps & DVB_USB_HAS_PID_FILTER)) {
  50                 err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a HW PID filter)");
  51                 return -ENODEV;
  52         }
  53
  54         if ((d->udev->speed == USB_SPEED_FULL && d->props.caps & DVB_USB_HAS_PID_FILTER) ||
  55                 (d->props.caps & DVB_USB_NEED_PID_FILTERING)) {
  56                 info("will use the device's hw PID filter.");
  57                 d->pid_filtering = 1;
  58                 d->max_feed_count = d->props.pid_filter_count;
  59         } else {
  60                 info("will pass the complete MPEG2 transport stream to the demuxer.");
  61                 d->pid_filtering = 0;
  62                 d->max_feed_count = 255;
  63         }
  64
  65         if (d->props.power_ctrl)
  66                 d->props.power_ctrl(d,1);
  67
  68         if ((ret = dvb_usb_urb_init(d)) ||
  69                 (ret = dvb_usb_dvb_init(d)) ||
  70                 (ret = dvb_usb_i2c_init(d)) ||
  71                 (ret = dvb_usb_fe_init(d))) {
  72                 dvb_usb_exit(d);
  73                 return ret;
  74         }
  75
  76         if ((ret = dvb_usb_remote_init(d)))
  77                 err("could not initialize remote control.");
  78
  79         if (d->props.power_ctrl)
  80                 d->props.power_ctrl(d,0);
  81
  82         return 0;
  83 }
  84
  85 /* determine the name and the state of the just found USB device */
  86 static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_properties *props, int *cold)
  87 {
  88         int i,j;
  89         struct dvb_usb_device_description *desc = NULL;
  90         *cold = -1;
  91
  92         for (i = 0; i < props->num_device_descs; i++) {
  93
  94                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
  95                         deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
  96                         if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
  97                                 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
  98                                 *cold = 1;
  99                                 desc = &props->devices[i];
 100                                 break;
 101                         }
 102                 }
 103
 104                 if (desc != NULL)
 105                         break;
 106
 107                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
 108                         deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
 109                         if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
 110                                 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
 111                                 *cold = 0;
 112                                 desc = &props->devices[i];
 113                                 break;
 114                         }
 115                 }
 116         }
 117
 118         if (desc != NULL && props->identify_state != NULL)
 119                 props->identify_state(udev,props,&desc,cold);
 120
 121         return desc;
 122 }
 123
 124 /*
 125  * USB
 126  */
 127 int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties *props, struct module *owner)
 128 {
 129         struct usb_device *udev = interface_to_usbdev(intf);
 130         struct dvb_usb_device *d = NULL;
 131         struct dvb_usb_device_description *desc = NULL;
 132
 133         int ret = -ENOMEM,cold=0;
 134
 135         if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) {
 136                 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
 137                 return -ENODEV;
 138         }
 139
 140         if (cold) {
 141                 info("found a '%s' in cold state, will try to load a firmware",desc->name);
 142                 ret = usb_cypress_load_firmware(udev,props->firmware,props->usb_ctrl);
 143         } else {
 144                 info("found a '%s' in warm state.",desc->name);
 145                 d = kmalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
 146                 if (d == NULL) {
 147                         err("no memory for 'struct dvb_usb_device'");
 148                         return ret;
 149                 }
 150                 memset(d,0,sizeof(struct dvb_usb_device));
 151
 152                 d->udev = udev;
 153                 memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
 154                 d->desc = desc;
 155                 d->owner = owner;
 156
 157                 if (d->props.size_of_priv > 0) {
 158                         d->priv = kmalloc(d->props.size_of_priv,GFP_KERNEL);
 159                         if (d->priv == NULL) {
 160                                 err("no memory for priv in 'struct dvb_usb_device'");
 161                                 kfree(d);
 162                                 return -ENOMEM;
 163                         }
 164                         memset(d->priv,0,d->props.size_of_priv);
 165                 }
 166
 167                 usb_set_intfdata(intf, d);
 168
 169                 ret = dvb_usb_init(d);
 170         }
 171
 172         if (ret == 0)
 173                 info("%s successfully initialized and connected.",desc->name);
 174         else
 175                 info("%s error while loading driver (%d)",desc->name,ret);
 176         return ret;
 177 }
 178 EXPORT_SYMBOL(dvb_usb_device_init);
 179
 180 void dvb_usb_device_exit(struct usb_interface *intf)
 181 {
 182         struct dvb_usb_device *d = usb_get_intfdata(intf);
 183         const char *name = "generic DVB-USB module";
 184
 185         usb_set_intfdata(intf,NULL);
 186         if (d != NULL && d->desc != NULL) {
 187                 name = d->desc->name;
 188                 dvb_usb_exit(d);
 189         }
 190         info("%s successfully deinitialized and disconnected.",name);
 191
 192 }
 193 EXPORT_SYMBOL(dvb_usb_device_exit);
 194
 195 /* module stuff */
 196 static int __init dvb_usb_module_init(void)
 197 {
 198         return 0;
 199 }
 200
 201 static void __exit dvb_usb_module_exit(void)
 202 {
 203 }
 204
 205 module_init (dvb_usb_module_init);
 206 module_exit (dvb_usb_module_exit);
 207
 208 MODULE_VERSION("0.3");
 209 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 210 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
 211 MODULE_LICENSE("GPL");