drivers/isdn/hisax/st5481_init.c

   1 /*
   2  * Driver for ST5481 USB ISDN modem
   3  *
   4  * Author       Frode Isaksen
   5  * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
   6  *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13 /*
  14  * TODO:
  15  *
  16  * b layer1 delay?
  17  * hotplug / unregister issues
  18  * mod_inc/dec_use_count
  19  * unify parts of d/b channel usb handling
  20  * file header
  21  * avoid copy to isoc buffer?
  22  * improve usb delay?
  23  * merge l1 state machines?
  24  * clean up debug
  25  */
  26
  27 #include <linux/config.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/usb.h>
  31 #include <linux/slab.h>
  32 #include "st5481.h"
  33
  34 MODULE_DESCRIPTION("ISDN4Linux: driver for ST5481 USB ISDN adapter");
  35 MODULE_AUTHOR("Frode Isaksen");
  36 MODULE_LICENSE("GPL");
  37
  38 static int protocol = 2;       /* EURO-ISDN Default */
  39 module_param(protocol, int, 0);
  40
  41 static int number_of_leds = 2;       /* 2 LEDs on the adpater default */
  42 module_param(number_of_leds, int, 0);
  43
  44 #ifdef CONFIG_HISAX_DEBUG
  45 static int debug = 0;
  46 module_param(debug, int, 0);
  47 #endif
  48 int st5481_debug;
  49
  50 static LIST_HEAD(adapter_list);
  51
  52 /* ======================================================================
  53  * registration/deregistration with the USB layer
  54  */
  55
  56 /*
  57  * This function will be called when the adapter is plugged
  58  * into the USB bus.
  59  */
  60 static int probe_st5481(struct usb_interface *intf,
  61                         const struct usb_device_id *id)
  62 {
  63         struct usb_device *dev = interface_to_usbdev(intf);
  64         struct st5481_adapter *adapter;
  65         struct hisax_b_if *b_if[2];
  66         int retval, i;
  67
  68         printk(KERN_INFO "st541: found adapter VendorId %04x, ProductId %04x, LEDs %d\n",
  69              le16_to_cpu(dev->descriptor.idVendor),
  70              le16_to_cpu(dev->descriptor.idProduct),
  71              number_of_leds);
  72
  73         adapter = kmalloc(sizeof(struct st5481_adapter), GFP_KERNEL);
  74         if (!adapter)
  75                 return -ENOMEM;
  76
  77         memset(adapter, 0, sizeof(struct st5481_adapter));
  78
  79         adapter->number_of_leds = number_of_leds;
  80         adapter->usb_dev = dev;
  81
  82         adapter->hisax_d_if.owner = THIS_MODULE;
  83         adapter->hisax_d_if.ifc.priv = adapter;
  84         adapter->hisax_d_if.ifc.l2l1 = st5481_d_l2l1;
  85
  86         for (i = 0; i < 2; i++) {
  87                 adapter->bcs[i].adapter = adapter;
  88                 adapter->bcs[i].channel = i;
  89                 adapter->bcs[i].b_if.ifc.priv = &adapter->bcs[i];
  90                 adapter->bcs[i].b_if.ifc.l2l1 = st5481_b_l2l1;
  91         }
  92         list_add(&adapter->list, &adapter_list);
  93
  94         retval = st5481_setup_usb(adapter);
  95         if (retval < 0)
  96                 goto err;
  97
  98         retval = st5481_setup_d(adapter);
  99         if (retval < 0)
 100                 goto err_usb;
 101
 102         retval = st5481_setup_b(&adapter->bcs[0]);
 103         if (retval < 0)
 104                 goto err_d;
 105
 106         retval = st5481_setup_b(&adapter->bcs[1]);
 107         if (retval < 0)
 108                 goto err_b;
 109
 110         for (i = 0; i < 2; i++)
 111                 b_if[i] = &adapter->bcs[i].b_if;
 112
 113         hisax_register(&adapter->hisax_d_if, b_if, "st5481_usb", protocol);
 114         st5481_start(adapter);
 115
 116         usb_set_intfdata(intf, adapter);
 117         return 0;
 118
 119  err_b:
 120         st5481_release_b(&adapter->bcs[0]);
 121  err_d:
 122         st5481_release_d(adapter);
 123  err_usb:
 124         st5481_release_usb(adapter);
 125  err:
 126         return -EIO;
 127 }
 128
 129 /*
 130  * This function will be called when the adapter is removed
 131  * from the USB bus.
 132  */
 133 static void disconnect_st5481(struct usb_interface *intf)
 134 {
 135         struct st5481_adapter *adapter = usb_get_intfdata(intf);
 136
 137         DBG(1,"");
 138
 139         usb_set_intfdata(intf, NULL);
 140         if (!adapter)
 141                 return;
 142
 143         list_del(&adapter->list);
 144
 145         st5481_stop(adapter);
 146         st5481_release_b(&adapter->bcs[1]);
 147         st5481_release_b(&adapter->bcs[0]);
 148         st5481_release_d(adapter);
 149         // we would actually better wait for completion of outstanding urbs
 150         mdelay(2);
 151         st5481_release_usb(adapter);
 152
 153         hisax_unregister(&adapter->hisax_d_if);
 154
 155         kfree(adapter);
 156 }
 157
 158 /*
 159  * The last 4 bits in the Product Id is set with 4 pins on the chip.
 160  */
 161 static struct usb_device_id st5481_ids[] = {
 162         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x0) },
 163         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x1) },
 164         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x2) },
 165         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x3) },
 166         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x4) },
 167         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x5) },
 168         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x6) },
 169         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x7) },
 170         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x8) },
 171         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x9) },
 172         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xA) },
 173         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xB) },
 174         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xC) },
 175         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xD) },
 176         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xE) },
 177         { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xF) },
 178         { }
 179 };
 180 MODULE_DEVICE_TABLE (usb, st5481_ids);
 181
 182 static struct usb_driver st5481_usb_driver = {
 183         .name =         "st5481_usb",
 184         .probe =        probe_st5481,
 185         .disconnect =   disconnect_st5481,
 186         .id_table =     st5481_ids,
 187 };
 188
 189 static int __init st5481_usb_init(void)
 190 {
 191         int retval;
 192
 193 #ifdef CONFIG_HISAX_DEBUG
 194         st5481_debug = debug;
 195 #endif
 196
 197         printk(KERN_INFO "hisax_st5481: ST5481 USB ISDN driver $Revision: 2.4.2.3 $\n");
 198
 199         retval = st5481_d_init();
 200         if (retval < 0)
 201                 goto out;
 202
 203         retval = usb_register(&st5481_usb_driver);
 204         if (retval < 0)
 205                 goto out_d_exit;
 206
 207         return 0;
 208
 209  out_d_exit:
 210         st5481_d_exit();
 211  out:
 212         return retval;
 213 }
 214
 215 static void __exit st5481_usb_exit(void)
 216 {
 217         usb_deregister(&st5481_usb_driver);
 218         st5481_d_exit();
 219 }
 220
 221 module_init(st5481_usb_init);
 222 module_exit(st5481_usb_exit);