Krzysztof Halasa | 921a86e | 2010-08-12 23:14:07 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * SBE 2T3E3 synchronous serial card driver for Linux |
| 3 | * |
| 4 | * Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of version 2 of the GNU General Public License |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This code is based on a driver written by SBE Inc. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/capability.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/netdevice.h> |
| 18 | #include <linux/pci.h> |
| 19 | #include <linux/hdlc.h> |
| 20 | #include <linux/if_arp.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include "2t3e3.h" |
| 23 | |
| 24 | int t3e3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 25 | { |
| 26 | struct channel *sc = dev_to_priv(dev); |
| 27 | int cmd_2t3e3, len, rlen; |
| 28 | t3e3_param_t param; |
| 29 | t3e3_resp_t resp; |
| 30 | void *data = ifr->ifr_data + sizeof(cmd_2t3e3) + sizeof(len); |
| 31 | |
| 32 | if (cmd == SIOCWANDEV) |
| 33 | return hdlc_ioctl(dev, ifr, cmd); |
| 34 | if (!capable(CAP_SYS_ADMIN)) |
| 35 | return -EPERM; |
| 36 | if (cmd != SIOCDEVPRIVATE + 15) |
| 37 | return -EINVAL; |
| 38 | |
| 39 | if (copy_from_user(&cmd_2t3e3, ifr->ifr_data, sizeof(cmd_2t3e3))) |
| 40 | return -EFAULT; |
| 41 | if (copy_from_user(&len, ifr->ifr_data + sizeof(cmd_2t3e3), sizeof(len))) |
| 42 | return -EFAULT; |
| 43 | |
| 44 | if (len > sizeof(param)) |
| 45 | return -EFAULT; |
| 46 | |
| 47 | if (len) |
| 48 | if (copy_from_user(¶m, data, len)) |
| 49 | return -EFAULT; |
| 50 | |
| 51 | t3e3_if_config(sc, cmd_2t3e3, (char *)¶m, &resp, &rlen); |
| 52 | |
| 53 | if (rlen) |
| 54 | if (copy_to_user(data, &resp, rlen)) |
| 55 | return -EFAULT; |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | static struct net_device_stats* t3e3_get_stats(struct net_device *dev) |
| 61 | { |
| 62 | struct net_device_stats *nstats = &dev->stats; |
| 63 | struct channel *sc = dev_to_priv(dev); |
| 64 | t3e3_stats_t *stats = &sc->s; |
| 65 | |
| 66 | memset(nstats, 0, sizeof(struct net_device_stats)); |
| 67 | nstats->rx_packets = stats->in_packets; |
| 68 | nstats->tx_packets = stats->out_packets; |
| 69 | nstats->rx_bytes = stats->in_bytes; |
| 70 | nstats->tx_bytes = stats->out_bytes; |
| 71 | |
| 72 | nstats->rx_errors = stats->in_errors; |
| 73 | nstats->tx_errors = stats->out_errors; |
| 74 | nstats->rx_crc_errors = stats->in_error_crc; |
| 75 | |
| 76 | |
| 77 | nstats->rx_dropped = stats->in_dropped; |
| 78 | nstats->tx_dropped = stats->out_dropped; |
| 79 | nstats->tx_carrier_errors = stats->out_error_lost_carr + |
| 80 | stats->out_error_no_carr; |
| 81 | |
| 82 | return nstats; |
| 83 | } |
| 84 | |
| 85 | int t3e3_open(struct net_device *dev) |
| 86 | { |
| 87 | struct channel *sc = dev_to_priv(dev); |
| 88 | int ret = hdlc_open(dev); |
| 89 | |
| 90 | if (ret) |
| 91 | return ret; |
| 92 | |
| 93 | sc->r.flags |= SBE_2T3E3_FLAG_NETWORK_UP; |
| 94 | dc_start(dev_to_priv(dev)); |
| 95 | netif_start_queue(dev); |
| 96 | try_module_get(THIS_MODULE); |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | int t3e3_close(struct net_device *dev) |
| 101 | { |
| 102 | struct channel *sc = dev_to_priv(dev); |
| 103 | hdlc_close(dev); |
| 104 | netif_stop_queue(dev); |
| 105 | dc_stop(sc); |
| 106 | sc->r.flags &= ~SBE_2T3E3_FLAG_NETWORK_UP; |
| 107 | module_put(THIS_MODULE); |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | static int t3e3_attach(struct net_device *dev, unsigned short foo1, |
| 112 | unsigned short foo2) |
| 113 | { |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | static const struct net_device_ops t3e3_ops = { |
| 118 | .ndo_open = t3e3_open, |
| 119 | .ndo_stop = t3e3_close, |
| 120 | .ndo_change_mtu = hdlc_change_mtu, |
| 121 | .ndo_start_xmit = hdlc_start_xmit, |
| 122 | .ndo_do_ioctl = t3e3_ioctl, |
| 123 | .ndo_get_stats = t3e3_get_stats, |
| 124 | }; |
| 125 | |
| 126 | int setup_device(struct net_device *dev, struct channel *sc) |
| 127 | { |
| 128 | hdlc_device *hdlc = dev_to_hdlc(dev); |
| 129 | int retval; |
| 130 | |
| 131 | dev->base_addr = pci_resource_start(sc->pdev, 0); |
| 132 | dev->irq = sc->pdev->irq; |
| 133 | dev->netdev_ops = &t3e3_ops; |
| 134 | dev->tx_queue_len = 100; |
| 135 | hdlc->xmit = t3e3_if_start_xmit; |
| 136 | hdlc->attach = t3e3_attach; |
| 137 | if ((retval = register_hdlc_device(dev))) { |
| 138 | dev_err(&sc->pdev->dev, "error registering HDLC device\n"); |
| 139 | return retval; |
| 140 | } |
| 141 | return 0; |
| 142 | } |