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