usb_netdev.c

   1 /*
   2  * Prism54 USB driver
   3  */
   4
   5 #include <linux/config.h>
   6 #include <linux/kernel.h>
   7 #include <linux/errno.h>
   8 #include <linux/init.h>
   9 #include <linux/slab.h>
  10 #include <linux/module.h>
  11 #include <linux/smp_lock.h>
  12 #include <linux/completion.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <linux/wireless.h>
  16 #include <asm/uaccess.h>
  17 #include <linux/usb.h>
  18
  19 #include "prism54_usb.h"
  20 #include "isl_38xx.h"
  21 #include "ioctl.h"
  22
  23 const char dummy_mac[ETH_ALEN] = {0x00, 0x3d, 0xb4, 0x00, 0x00, 0x00};
  24
  25 static int p54u_open(struct net_device *netdev)
  26 {
  27         struct p54u *p54u = netdev_priv(netdev);
  28         struct usb_device *usbdev = p54u->usbdev;
  29
  30         p54u_info("sem down\n");
  31         down (&p54u->disconnect_sem);
  32         p54u_info("sem down done\n");
  33
  34
  35         if(!p54u->running)
  36         {
  37                 p54u_info("Not running on open, booting\n");
  38                 if(p54u_boot(netdev)) {
  39                         p54u_err("Failed to boot device.\n");
  40                         goto do_err;
  41                 }
  42         }
  43
  44         netif_start_queue(netdev);
  45         p54u_info("sem up\n");
  46         up(&p54u->disconnect_sem);
  47         p54u_info("sem up done\n");
  48         return 0;
  49
  50     do_err:
  51         p54u_err("Failed to open device.\n");
  52         p54u_shutdown(netdev);
  53         p54u_info("sem up\n");
  54         up(&p54u->disconnect_sem);
  55         p54u_info("sem up done\n");
  56         return -EIO;
  57 }
  58
  59 static int p54u_close(struct net_device *netdev)
  60 {
  61         struct p54u *p54u = netdev_priv(netdev);
  62         struct usb_device *usbdev = p54u->usbdev;
  63
  64         netif_stop_queue(netdev);
  65
  66         if(!load_fw)
  67         {
  68                 p54u_info("Close with firmware unload\n");
  69                 if (p54u->running)
  70                 {
  71                         p54u_info("Running on close,shutting down\n");
  72                         if (p54u_shutdown(netdev))
  73                         {
  74                                 p54u_info("Shutdown failed\n");
  75                                 return -EIO;
  76                         }
  77                 }
  78         }
  79
  80         return 0;
  81 }
  82
  83 static void p54u_tx_timeout(struct net_device *netdev)
  84 {
  85         struct p54u *p54u = netdev_priv(netdev);
  86         struct usb_device *usbdev = p54u->usbdev;
  87
  88         return;
  89 }
  90
  91 static int p54u_transmit(struct sk_buff *skb, struct net_device *netdev)
  92 {
  93         struct p54u *p54u = netdev_priv(netdev);
  94         struct usb_device *usbdev = p54u->usbdev;
  95
  96         p54u_info("xmit\n");
  97         netdev->trans_start = jiffies;
  98         /* do the submit urb stuff */
  99         dev_kfree_skb(skb);
 100
 101         return 0;
 102 }
 103
 104 static struct net_device_stats *
 105 p54u_statistics(struct net_device *netdev)
 106 {
 107         struct p54u *p54u = netdev_priv(netdev);
 108
 109         return &p54u->statistics;
 110 }
 111
 112 static int
 113 p54u_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
 114 {
 115         return -EOPNOTSUPP;
 116 }
 117
 118 int p54u_setup_net(struct net_device *netdev)
 119 {
 120         struct p54u *p54u = netdev_priv(netdev);
 121         struct usb_device *usbdev = p54u->usbdev;
 122
 123         /* initialize the function pointers */
 124         netdev->open = &p54u_open;
 125         netdev->stop = &p54u_close;
 126         netdev->get_stats = &p54u_statistics;
 127         netdev->get_wireless_stats = &p54u_wireless_stats;
 128         netdev->do_ioctl = &p54u_ioctl;
 129         netdev->wireless_handlers = (struct iw_handler_def *) &p54u_handler_def;
 130
 131         netdev->hard_start_xmit = &p54u_transmit;
 132         netdev->addr_len = ETH_ALEN;
 133 //      netdev->set_mac_address = &prism54_set_mac_address;
 134
 135         netdev->watchdog_timeo = P54U_TX_TIMEOUT;
 136         netdev->tx_timeout = &p54u_tx_timeout;
 137
 138         return 0;
 139 }
 140