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921a86e0 KH |
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 | ||
1228cd13 | 24 | static int t3e3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
921a86e0 KH |
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; | |
03bbb232 | 30 | void __user *data = ifr->ifr_data + sizeof(cmd_2t3e3) + sizeof(len); |
921a86e0 KH |
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 | ||
1228cd13 | 85 | static int t3e3_open(struct net_device *dev) |
921a86e0 KH |
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 | ||
1228cd13 | 100 | static int t3e3_close(struct net_device *dev) |
921a86e0 KH |
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 | } |