diff options
Diffstat (limited to 'drivers/net/wireless/intersil/orinoco/main.c')
| -rw-r--r-- | drivers/net/wireless/intersil/orinoco/main.c | 2429 |
1 files changed, 2429 insertions, 0 deletions
diff --git a/drivers/net/wireless/intersil/orinoco/main.c b/drivers/net/wireless/intersil/orinoco/main.c new file mode 100644 index 000000000000..7b5c554323c7 --- /dev/null +++ b/drivers/net/wireless/intersil/orinoco/main.c @@ -0,0 +1,2429 @@ +/* main.c - (formerly known as dldwd_cs.c, orinoco_cs.c and orinoco.c) + * + * A driver for Hermes or Prism 2 chipset based PCMCIA wireless + * adaptors, with Lucent/Agere, Intersil or Symbol firmware. + * + * Current maintainers (as of 29 September 2003) are: + * Pavel Roskin <proski AT gnu.org> + * and David Gibson <hermes AT gibson.dropbear.id.au> + * + * (C) Copyright David Gibson, IBM Corporation 2001-2003. + * Copyright (C) 2000 David Gibson, Linuxcare Australia. + * With some help from : + * Copyright (C) 2001 Jean Tourrilhes, HP Labs + * Copyright (C) 2001 Benjamin Herrenschmidt + * + * Based on dummy_cs.c 1.27 2000/06/12 21:27:25 + * + * Portions based on wvlan_cs.c 1.0.6, Copyright Andreas Neuhaus <andy + * AT fasta.fh-dortmund.de> + * http://www.stud.fh-dortmund.de/~andy/wvlan/ + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License + * at http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and + * limitations under the License. + * + * The initial developer of the original code is David A. Hinds + * <dahinds AT users.sourceforge.net>. Portions created by David + * A. Hinds are Copyright (C) 1999 David A. Hinds. All Rights + * Reserved. + * + * Alternatively, the contents of this file may be used under the + * terms of the GNU General Public License version 2 (the "GPL"), in + * which case the provisions of the GPL are applicable instead of the + * above. If you wish to allow the use of your version of this file + * only under the terms of the GPL and not to allow others to use your + * version of this file under the MPL, indicate your decision by + * deleting the provisions above and replace them with the notice and + * other provisions required by the GPL. If you do not delete the + * provisions above, a recipient may use your version of this file + * under either the MPL or the GPL. */ + +/* + * TODO + * o Handle de-encapsulation within network layer, provide 802.11 + * headers (patch from Thomas 'Dent' Mirlacher) + * o Fix possible races in SPY handling. + * o Disconnect wireless extensions from fundamental configuration. + * o (maybe) Software WEP support (patch from Stano Meduna). + * o (maybe) Use multiple Tx buffers - driver handling queue + * rather than firmware. + */ + +/* Locking and synchronization: + * + * The basic principle is that everything is serialized through a + * single spinlock, priv->lock. The lock is used in user, bh and irq + * context, so when taken outside hardirq context it should always be + * taken with interrupts disabled. The lock protects both the + * hardware and the struct orinoco_private. + * + * Another flag, priv->hw_unavailable indicates that the hardware is + * unavailable for an extended period of time (e.g. suspended, or in + * the middle of a hard reset). This flag is protected by the + * spinlock. All code which touches the hardware should check the + * flag after taking the lock, and if it is set, give up on whatever + * they are doing and drop the lock again. The orinoco_lock() + * function handles this (it unlocks and returns -EBUSY if + * hw_unavailable is non-zero). + */ + +#define DRIVER_NAME "orinoco" + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/suspend.h> +#include <linux/if_arp.h> +#include <linux/wireless.h> +#include <linux/ieee80211.h> +#include <net/iw_handler.h> +#include <net/cfg80211.h> + +#include "hermes_rid.h" +#include "hermes_dld.h" +#include "hw.h" +#include "scan.h" +#include "mic.h" +#include "fw.h" +#include "wext.h" +#include "cfg.h" +#include "main.h" + +#include "orinoco.h" + +/********************************************************************/ +/* Module information */ +/********************************************************************/ + +MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & " + "David Gibson <hermes@gibson.dropbear.id.au>"); +MODULE_DESCRIPTION("Driver for Lucent Orinoco, Prism II based " + "and similar wireless cards"); +MODULE_LICENSE("Dual MPL/GPL"); + +/* Level of debugging. Used in the macros in orinoco.h */ +#ifdef ORINOCO_DEBUG +int orinoco_debug = ORINOCO_DEBUG; +EXPORT_SYMBOL(orinoco_debug); +module_param(orinoco_debug, int, 0644); +MODULE_PARM_DESC(orinoco_debug, "Debug level"); +#endif + +static bool suppress_linkstatus; /* = 0 */ +module_param(suppress_linkstatus, bool, 0644); +MODULE_PARM_DESC(suppress_linkstatus, "Don't log link status changes"); + +static int ignore_disconnect; /* = 0 */ +module_param(ignore_disconnect, int, 0644); +MODULE_PARM_DESC(ignore_disconnect, + "Don't report lost link to the network layer"); + +int force_monitor; /* = 0 */ +module_param(force_monitor, int, 0644); +MODULE_PARM_DESC(force_monitor, "Allow monitor mode for all firmware versions"); + +/********************************************************************/ +/* Internal constants */ +/********************************************************************/ + +/* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */ +static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00}; +#define ENCAPS_OVERHEAD (sizeof(encaps_hdr) + 2) + +#define ORINOCO_MIN_MTU 256 +#define ORINOCO_MAX_MTU (IEEE80211_MAX_DATA_LEN - ENCAPS_OVERHEAD) + +#define MAX_IRQLOOPS_PER_IRQ 10 +#define MAX_IRQLOOPS_PER_JIFFY (20000 / HZ) /* Based on a guestimate of + * how many events the + * device could + * legitimately generate */ + +#define DUMMY_FID 0xFFFF + +/*#define MAX_MULTICAST(priv) (priv->firmware_type == FIRMWARE_TYPE_AGERE ? \ + HERMES_MAX_MULTICAST : 0)*/ +#define MAX_MULTICAST(priv) (HERMES_MAX_MULTICAST) + +#define ORINOCO_INTEN (HERMES_EV_RX | HERMES_EV_ALLOC \ + | HERMES_EV_TX | HERMES_EV_TXEXC \ + | HERMES_EV_WTERR | HERMES_EV_INFO \ + | HERMES_EV_INFDROP) + +/********************************************************************/ +/* Data types */ +/********************************************************************/ + +/* Beginning of the Tx descriptor, used in TxExc handling */ +struct hermes_txexc_data { + struct hermes_tx_descriptor desc; + __le16 frame_ctl; + __le16 duration_id; + u8 addr1[ETH_ALEN]; +} __packed; + +/* Rx frame header except compatibility 802.3 header */ +struct hermes_rx_descriptor { + /* Control */ + __le16 status; + __le32 time; + u8 silence; + u8 signal; + u8 rate; + u8 rxflow; + __le32 reserved; + + /* 802.11 header */ + __le16 frame_ctl; + __le16 duration_id; + u8 addr1[ETH_ALEN]; + u8 addr2[ETH_ALEN]; + u8 addr3[ETH_ALEN]; + __le16 seq_ctl; + u8 addr4[ETH_ALEN]; + + /* Data length */ + __le16 data_len; +} __packed; + +struct orinoco_rx_data { + struct hermes_rx_descriptor *desc; + struct sk_buff *skb; + struct list_head list; +}; + +struct orinoco_scan_data { + void *buf; + size_t len; + int type; + struct list_head list; +}; + +/********************************************************************/ +/* Function prototypes */ +/********************************************************************/ + +static int __orinoco_set_multicast_list(struct net_device *dev); +static int __orinoco_up(struct orinoco_private *priv); +static int __orinoco_down(struct orinoco_private *priv); +static int __orinoco_commit(struct orinoco_private *priv); + +/********************************************************************/ +/* Internal helper functions */ +/********************************************************************/ + +void set_port_type(struct orinoco_private *priv) +{ + switch (priv->iw_mode) { + case NL80211_IFTYPE_STATION: + priv->port_type = 1; + priv->createibss = 0; + break; + case NL80211_IFTYPE_ADHOC: + if (priv->prefer_port3) { + priv->port_type = 3; + priv->createibss = 0; + } else { + priv->port_type = priv->ibss_port; + priv->createibss = 1; + } + break; + case NL80211_IFTYPE_MONITOR: + priv->port_type = 3; + priv->createibss = 0; + break; + default: + printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n", + priv->ndev->name); + } +} + +/********************************************************************/ +/* Device methods */ +/********************************************************************/ + +int orinoco_open(struct net_device *dev) +{ + struct orinoco_private *priv = ndev_priv(dev); + unsigned long flags; + int err; + + if (orinoco_lock(priv, &flags) != 0) + return -EBUSY; + + err = __orinoco_up(priv); + + if (!err) + priv->open = 1; + + orinoco_unlock(priv, &flags); + + return err; +} +EXPORT_SYMBOL(orinoco_open); + +int orinoco_stop(struct net_device *dev) +{ + struct orinoco_private *priv = ndev_priv(dev); + int err = 0; + + /* We mustn't use orinoco_lock() here, because we need to be + able to close the interface even if hw_unavailable is set + (e.g. as we're released after a PC Card removal) */ + orinoco_lock_irq(priv); + + priv->open = 0; + + err = __orinoco_down(priv); + + orinoco_unlock_irq(priv); + + return err; +} +EXPORT_SYMBOL(orinoco_stop); + +struct net_device_stats *orinoco_get_stats(struct net_device *dev) +{ + struct orinoco_private *priv = ndev_priv(dev); + + return &priv->stats; +} +EXPORT_SYMBOL(orinoco_get_stats); + +void orinoco_set_multicast_list(struct net_device *dev) +{ + struct orinoco_private *priv = ndev_priv(dev); + unsigned long flags; + + if (orinoco_lock(priv, &flags) != 0) { + printk(KERN_DEBUG "%s: orinoco_set_multicast_list() " + "called when hw_unavailable\n", dev->name); + return; + } + + __orinoco_set_multicast_list(dev); + orinoco_unlock(priv, &flags); +} +EXPORT_SYMBOL(orinoco_set_multicast_list); + +int orinoco_change_mtu(struct net_device *dev, int new_mtu) +{ + struct orinoco_private *priv = ndev_priv(dev); + + if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU)) + return -EINVAL; + + /* MTU + encapsulation + header length */ + if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) > + (priv->nicbuf_size - ETH_HLEN)) + return -EINVAL; + + dev->mtu = new_mtu; + + return 0; +} +EXPORT_SYMBOL(orinoco_change_mtu); + +/********************************************************************/ +/* Tx path */ +/********************************************************************/ + +/* Add encapsulation and MIC to the existing SKB. + * The main xmit routine will then send the whole lot to the card. + * Need 8 bytes headroom + * Need 8 bytes tailroom + * + * With encapsulated ethernet II frame + * -------- + * 803.3 header (14 bytes) + * dst[6] + * -------- src[6] + * 803.3 header (14 bytes) len[2] + * dst[6] 803.2 header (8 bytes) + * src[6] encaps[6] + * len[2] <- leave alone -> len[2] + * -------- -------- <-- 0 + * Payload Payload + * ... ... + * + * -------- -------- + * MIC (8 bytes) + * -------- + * + * returns 0 on success, -ENOMEM on error. + */ +int orinoco_process_xmit_skb(struct sk_buff *skb, + struct net_device *dev, + struct orinoco_private *priv, + int *tx_control, + u8 *mic_buf) +{ + struct orinoco_tkip_key *key; + struct ethhdr *eh; + int do_mic; + + key = (struct orinoco_tkip_key *) priv->keys[priv->tx_key].key; + + do_mic = ((priv->encode_alg == ORINOCO_ALG_TKIP) && + (key != NULL)); + + if (do_mic) + *tx_control |= (priv->tx_key << HERMES_MIC_KEY_ID_SHIFT) | + HERMES_TXCTRL_MIC; + + eh = (struct ethhdr *)skb->data; + + /* Encapsulate Ethernet-II frames */ + if (ntohs(eh->h_proto) > ETH_DATA_LEN) { /* Ethernet-II frame */ + struct header_struct { + struct ethhdr eth; /* 802.3 header */ + u8 encap[6]; /* 802.2 header */ + } __packed hdr; + int len = skb->len + sizeof(encaps_hdr) - (2 * ETH_ALEN); + + if (skb_headroom(skb) < ENCAPS_OVERHEAD) { + if (net_ratelimit()) + printk(KERN_ERR + "%s: Not enough headroom for 802.2 headers %d\n", + dev->name, skb_headroom(skb)); + return -ENOMEM; + } + + /* Fill in new header */ + memcpy(&hdr.eth, eh, 2 * ETH_ALEN); + hdr.eth.h_proto = htons(len); + memcpy(hdr.encap, encaps_hdr, sizeof(encaps_hdr)); + + /* Make room for the new header, and copy it in */ + eh = (struct ethhdr *) skb_push(skb, ENCAPS_OVERHEAD); + memcpy(eh, &hdr, sizeof(hdr)); + } + + /* Calculate Michael MIC */ + if (do_mic) { + size_t len = skb->len - ETH_HLEN; + u8 *mic = &mic_buf[0]; + + /* Have to write to an even address, so copy the spare + * byte across */ + if (skb->len % 2) { + *mic = skb->data[skb->len - 1]; + mic++; + } + + orinoco_mic(priv->tx_tfm_mic, key->tx_mic, + eh->h_dest, eh->h_source, 0 /* priority */, + skb->data + ETH_HLEN, + len, mic); + } + + return 0; +} +EXPORT_SYMBOL(orinoco_process_xmit_skb); + +static netdev_tx_t orinoco_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct orinoco_private *priv = ndev_priv(dev); + struct net_device_stats *stats = &priv->stats; + struct hermes *hw = &priv->hw; + int err = 0; + u16 txfid = priv->txfid; + int tx_control; + unsigned long flags; + u8 mic_buf[MICHAEL_MIC_LEN + 1]; + + if (!netif_running(dev)) { + printk(KERN_ERR "%s: Tx on stopped device!\n", + dev->name); + return NETDEV_TX_BUSY; + } + + if (netif_queue_stopped(dev)) { + printk(KERN_DEBUG "%s: Tx while transmitter busy!\n", + dev->name); + return NETDEV_TX_BUSY; + } + + if (orinoco_lock(priv, &flags) != 0) { + printk(KERN_ERR "%s: orinoco_xmit() called while hw_unavailable\n", + dev->name); + return NETDEV_TX_BUSY; + } + + if (!netif_carrier_ok(dev) || + (priv->iw_mode == NL80211_IFTYPE_MONITOR)) { + /* Oops, the firmware hasn't established a connection, + silently drop the packet (this seems to be the + safest approach). */ + goto drop; + } + + /* Check packet length */ + if (skb->len < ETH_HLEN) + goto drop; + + tx_control = HERMES_TXCTRL_TX_OK | HERMES_TXCTRL_TX_EX; + + err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control, + &mic_buf[0]); + if (err) + goto drop; + + if (priv->has_alt_txcntl) { + /* WPA enabled firmwares have tx_cntl at the end of + * the 802.11 header. So write zeroed descriptor and + * 802.11 header at the same time + */ + char desc[HERMES_802_3_OFFSET]; + __le16 *txcntl = (__le16 *) &desc[HERMES_TXCNTL2_OFFSET]; + + memset(&desc, 0, sizeof(desc)); + + *txcntl = cpu_to_le16(tx_control); + err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc), + txfid, 0); + if (err) { + if (net_ratelimit()) + printk(KERN_ERR "%s: Error %d writing Tx " + "descriptor to BAP\n", dev->name, err); + goto busy; + } + } else { + struct hermes_tx_descriptor desc; + + memset(&desc, 0, sizeof(desc)); + + desc.tx_control = cpu_to_le16(tx_control); + err = hw->ops->bap_pwrite(hw, USER_BAP, &desc, sizeof(desc), + txfid, 0); + if (err) { + if (net_ratelimit()) + printk(KERN_ERR "%s: Error %d writing Tx " + "descriptor to BAP\n", dev->name, err); + goto busy; + } + + /* Clear the 802.11 header and data length fields - some + * firmwares (e.g. Lucent/Agere 8.xx) appear to get confused + * if this isn't done. */ + hermes_clear_words(hw, HERMES_DATA0, + HERMES_802_3_OFFSET - HERMES_802_11_OFFSET); + } + + err = hw->ops->bap_pwrite(hw, USER_BAP, skb->data, skb->len, + txfid, HERMES_802_3_OFFSET); + if (err) { + printk(KERN_ERR "%s: Error %d writing packet to BAP\n", + dev->name, err); + goto busy; + } + + if (tx_control & HERMES_TXCTRL_MIC) { + size_t offset = HERMES_802_3_OFFSET + skb->len; + size_t len = MICHAEL_MIC_LEN; + + if (offset % 2) { + offset--; + len++; + } + err = hw->ops->bap_pwrite(hw, USER_BAP, &mic_buf[0], len, + txfid, offset); + if (err) { + printk(KERN_ERR "%s: Error %d writing MIC to BAP\n", + dev->name, err); + goto busy; + } + } + + /* Finally, we actually initiate the send */ + netif_stop_queue(dev); + + err = hw->ops->cmd_wait(hw, HERMES_CMD_TX | HERMES_CMD_RECL, + txfid, NULL); + if (err) { + netif_start_queue(dev); + if (net_ratelimit()) + printk(KERN_ERR "%s: Error %d transmitting packet\n", + dev->name, err); + goto busy; + } + + stats->tx_bytes += HERMES_802_3_OFFSET + skb->len; + goto ok; + + drop: + stats->tx_errors++; + stats->tx_dropped++; + + ok: + orinoco_unlock(priv, &flags); + dev_kfree_skb(skb); + return NETDEV_TX_OK; + + busy: + if (err == -EIO) + schedule_work(&priv->reset_work); + orinoco_unlock(priv, &flags); + return NETDEV_TX_BUSY; +} + +static void __orinoco_ev_alloc(struct net_device *dev, struct hermes *hw) +{ + struct orinoco_private *priv = ndev_priv(dev); + u16 fid = hermes_read_regn(hw, ALLOCFID); + + if (fid != priv->txfid) { + if (fid != DUMMY_FID) + printk(KERN_WARNING "%s: Allocate event on unexpected fid (%04X)\n", + dev->name, fid); + return; + } + + hermes_write_regn(hw, ALLOCFID, DUMMY_FID); +} + +static void __orinoco_ev_tx(struct net_device *dev, struct hermes *hw) +{ + struct orinoco_private *priv = ndev_priv(dev); + struct net_device_stats *stats = &priv->stats; + + stats->tx_packets++; + + netif_wake_queue(dev); + + hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID); +} + +static void __orinoco_ev_txexc(struct net_device *dev, struct hermes *hw) +{ + struct orinoco_private *priv = ndev_priv(dev); + struct net_device_stats *stats = &priv->stats; + u16 fid = hermes_read_regn(hw, TXCOMPLFID); + u16 status; + struct hermes_txexc_data hdr; + int err = 0; + + if (fid == DUMMY_FID) + return; /* Nothing's really happened */ + + /* Read part of the frame header - we need status and addr1 */ + err = hw->ops->bap_pread(hw, IRQ_BAP, &hdr, + sizeof(struct hermes_txexc_data), + fid, 0); + + hermes_write_regn(hw, TXCOMPLFID, DUMMY_FID); + stats->tx_errors++; + + if (err) { + printk(KERN_WARNING "%s: Unable to read descriptor on Tx error " + "(FID=%04X error %d)\n", + dev->name, fid, err); + return; + } + + DEBUG(1, "%s: Tx error, err %d (FID=%04X)\n", dev->name, + err, fid); + + /* We produce a TXDROP event only for retry or lifetime + * exceeded, because that's the only status that really mean + * that this particular node went away. + * Other errors means that *we* screwed up. - Jean II */ + status = le16_to_cpu(hdr.desc.status); + if (status & (HERMES_TXSTAT_RETRYERR | HERMES_TXSTAT_AGEDERR)) { + union iwreq_data wrqu; + + /* Copy 802.11 dest address. + * We use the 802.11 header because the frame may + * not be 802.3 or may be mangled... + * In Ad-Hoc mode, it will be the node address. + * In managed mode, it will be most likely the AP addr + * User space will figure out how to convert it to + * whatever it needs (IP address or else). + * - Jean II */ + memcpy(wrqu.addr.sa_data, hdr.addr1, ETH_ALEN); + wrqu.addr.sa_family = ARPHRD_ETHER; + + /* Send event to user space */ + wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL); + } + + netif_wake_queue(dev); +} + +void orinoco_tx_timeout(struct net_device *dev) +{ + struct orinoco_private *priv = ndev_priv(dev); + struct net_device_stats *stats = &priv->stats; + struct hermes *hw = &priv->hw; + + printk(KERN_WARNING "%s: Tx timeout! " + "ALLOCFID=%04x, TXCOMPLFID=%04x, EVSTAT=%04x\n", + dev->name, hermes_read_regn(hw, ALLOCFID), + hermes_read_regn(hw, TXCOMPLFID), hermes_read_regn(hw, EVSTAT)); + + stats->tx_errors++; + + schedule_work(&priv->reset_work); +} +EXPORT_SYMBOL(orinoco_tx_timeout); + +/********************************************************************/ +/* Rx path (data frames) */ +/********************************************************************/ + +/* Does the frame have a SNAP header indicating it should be + * de-encapsulated to Ethernet-II? */ +static inline int is_ethersnap(void *_hdr) +{ + u8 *hdr = _hdr; + + /* We de-encapsulate all packets which, a) have SNAP headers + * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header + * and where b) the OUI of the SNAP header is 00:00:00 or + * 00:00:f8 - we need both because different APs appear to use + * different OUIs for some reason */ + return (memcmp(hdr, &encaps_hdr, 5) == 0) + && ((hdr[5] == 0x00) || (hdr[5] == 0xf8)); +} + +static inline void orinoco_spy_gather(struct net_device *dev, u_char *mac, + int level, int noise) +{ + struct iw_quality wstats; + wstats.level = level - 0x95; + wstats.noise = noise - 0x95; + wstats.qual = (level > noise) ? (level - noise) : 0; + wstats.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM; + /* Update spy records */ + wireless_spy_update(dev, mac, &wstats); +} + +static void orinoco_stat_gather(struct net_device *dev, + struct sk_buff *skb, + struct hermes_rx_descriptor *desc) +{ + struct orinoco_private *priv = ndev_priv(dev); + + /* Using spy support with lots of Rx packets, like in an + * infrastructure (AP), will really slow down everything, because + * the MAC address must be compared to each entry of the spy list. + * If the user really asks for it (set some address in the + * spy list), we do it, but he will pay the price. + * Note that to get here, you need both WIRELESS_SPY + * compiled in AND some addresses in the list !!! + */ + /* Note : gcc will optimise the whole section away if + * WIRELESS_SPY is not defined... - Jean II */ + if (SPY_NUMBER(priv)) { + orinoco_spy_gather(dev, skb_mac_header(skb) + ETH_ALEN, + desc->signal, desc->silence); + } +} + +/* + * orinoco_rx_monitor - handle received monitor frames. + * + * Arguments: + * dev network device + * rxfid received FID + * desc rx descriptor of the frame + * + * Call context: interrupt + */ +static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid, + struct hermes_rx_descriptor *desc) +{ + u32 hdrlen = 30; /* return full header by default */ + u32 datalen = 0; + u16 fc; + int err; + int len; + struct sk_buff *skb; + struct orinoco_private *priv = ndev_priv(dev); + struct net_device_stats *stats = &priv->stats; + struct hermes *hw = &priv->hw; + + len = le16_to_cpu(desc->data_len); + + /* Determine the size of the header and the data */ + fc = le16_to_cpu(desc->frame_ctl); + switch (fc & IEEE80211_FCTL_FTYPE) { + case IEEE80211_FTYPE_DATA: + if ((fc & IEEE80211_FCTL_TODS) + && (fc & IEEE80211_FCTL_FROMDS)) + hdrlen = 30; + else + hdrlen = 24; + datalen = len; + break; + case IEEE80211_FTYPE_MGMT: + hdrlen = 24; + datalen = len; + break; + case IEEE80211_FTYPE_CTL: + switch (fc & IEEE80211_FCTL_STYPE) { + case IEEE80211_STYPE_PSPOLL: + case IEEE80211_STYPE_RTS: + case IEEE80211_STYPE_CFEND: + case IEEE80211_STYPE_CFENDACK: + hdrlen = 16; + break; + case IEEE80211_STYPE_CTS: + case IEEE80211_STYPE_ACK: + hdrlen = 10; + break; + } + break; + default: + /* Unknown frame type */ + break; + } + + /* sanity check the length */ + if (datalen > IEEE80211_MAX_DATA_LEN + 12) { + printk(KERN_DEBUG "%s: oversized monitor frame, " + "data length = %d\n", dev->name, datalen); + stats->rx_length_errors++; + goto update_stats; + } + + skb = dev_alloc_skb(hdrlen + datalen); + if (!skb) { + printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n", + dev->name); + goto update_stats; + } + + /* Copy the 802.11 header to the skb */ + memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen); + skb_reset_mac_header(skb); + + /* If any, copy the data from the card to the skb */ + if (datalen > 0) { + err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, datalen), + ALIGN(datalen, 2), rxfid, + HERMES_802_2_OFFSET); + if (err) { + printk(KERN_ERR "%s: error %d reading monitor frame\n", + dev->name, err); + goto drop; + } + } + + skb->dev = dev; + skb->ip_summed = CHECKSUM_NONE; + skb->pkt_type = PACKET_OTHERHOST; + skb->protocol = cpu_to_be16(ETH_P_802_2); + + stats->rx_packets++; + stats->rx_bytes += skb->len; + + netif_rx(skb); + return; + + drop: + dev_kfree_skb_irq(skb); + update_stats: + stats->rx_errors++; + stats->rx_dropped++; +} + +void __orinoco_ev_rx(struct net_device *dev, struct hermes *hw) +{ + struct orinoco_private *priv = ndev_priv(dev); + struct net_device_stats *stats = &priv->stats; + struct iw_statistics *wstats = &priv->wstats; + struct sk_buff *skb = NULL; + u16 rxfid, status; + int length; + struct hermes_rx_descriptor *desc; + struct orinoco_rx_data *rx_data; + int err; + + desc = kmalloc(sizeof(*desc), GFP_ATOMIC); + if (!desc) + goto update_stats; + + rxfid = hermes_read_regn(hw, RXFID); + + err = hw->ops->bap_pread(hw, IRQ_BAP, desc, sizeof(*desc), + rxfid, 0); + if (err) { + printk(KERN_ERR "%s: error %d reading Rx descriptor. " + "Frame dropped.\n", dev->name, err); + goto update_stats; + } + + status = le16_to_cpu(desc->status); + + if (status & HERMES_RXSTAT_BADCRC) { + DEBUG(1, "%s: Bad CRC on Rx. Frame dropped.\n", + dev->name); + stats->rx_crc_errors++; + goto update_stats; + } + + /* Handle frames in monitor mode */ + if (priv->iw_mode == NL80211_IFTYPE_MONITOR) { + orinoco_rx_monitor(dev, rxfid, desc); + goto out; + } + + if (status & HERMES_RXSTAT_UNDECRYPTABLE) { + DEBUG(1, "%s: Undecryptable frame on Rx. Frame dropped.\n", + dev->name); + wstats->discard.code++; + goto update_stats; + } + + length = le16_to_cpu(desc->data_len); + + /* Sanity checks */ + if (length < 3) { /* No for even an 802.2 LLC header */ + /* At least on Symbol firmware with PCF we get quite a + lot of these legitimately - Poll frames with no + data. */ + goto out; + } + if (length > IEEE80211_MAX_DATA_LEN) { + printk(KERN_WARNING "%s: Oversized frame received (%d bytes)\n", + dev->name, length); + stats->rx_length_errors++; + goto update_stats; + } + + /* Payload size does not include Michael MIC. Increase payload + * size to read it together with the data. */ + if (status & HERMES_RXSTAT_MIC) + length += MICHAEL_MIC_LEN; + + /* We need space for the packet data itself, plus an ethernet + header, plus 2 bytes so we can align the IP header on a + 32bit boundary, plus 1 byte so we can read in odd length + packets from the card, which has an IO granularity of 16 + bits */ + skb = dev_alloc_skb(length + ETH_HLEN + 2 + 1); + if (!skb) { + printk(KERN_WARNING "%s: Can't allocate skb for Rx\n", + dev->name); + goto update_stats; + } + + /* We'll prepend the header, so reserve space for it. The worst + case is no decapsulation, when 802.3 header is prepended and + nothing is removed. 2 is for aligning the IP header. */ + skb_reserve(skb, ETH_HLEN + 2); + + err = hw->ops->bap_pread(hw, IRQ_BAP, skb_put(skb, length), + ALIGN(length, 2), rxfid, + HERMES_802_2_OFFSET); + if (err) { + printk(KERN_ERR "%s: error %d reading frame. " + "Frame dropped.\n", dev->name, err); + goto drop; + } + + /* Add desc and skb to rx queue */ + rx_data = kzalloc(sizeof(*rx_data), GFP_ATOMIC); + if (!rx_data) + goto drop; + + rx_data->desc = desc; + rx_data->skb = skb; + list_add_tail(&rx_data->list, &priv->rx_list); + tasklet_schedule(&priv->rx_tasklet); + + return; + +drop: + dev_kfree_skb_irq(skb); +update_stats: + stats->rx_errors++; + stats->rx_dropped++; +out: + kfree(desc); +} +EXPORT_SYMBOL(__orinoco_ev_rx); + +static void orinoco_rx(struct net_device *dev, + struct hermes_rx_descriptor *desc, + struct sk_buff *skb) +{ + struct orinoco_private *priv = ndev_priv(dev); + struct net_device_stats *stats = &priv->stats; + u16 status, fc; + int length; + struct ethhdr *hdr; + + status = le16_to_cpu(desc->status); + length = le16_to_cpu(desc->data_len); + fc = le16_to_cpu(desc->frame_ctl); + + /* Calculate and check MIC */ + if (status & HERMES_RXSTAT_MIC) { + struct orinoco_tkip_key *key; + int key_id = ((status & HERMES_RXSTAT_MIC_KEY_ID) >> + HERMES_MIC_KEY_ID_SHIFT); + u8 mic[MICHAEL_MIC_LEN]; + u8 *rxmic; + u8 *src = (fc & IEEE80211_FCTL_FROMDS) ? + desc->addr3 : desc->addr2; + + /* Extract Michael MIC from payload */ + rxmic = skb->data + skb->len - MICHAEL_MIC_LEN; + + skb_trim(skb, skb->len - MICHAEL_MIC_LEN); + length -= MICHAEL_MIC_LEN; + + key = (struct orinoco_tkip_key *) priv->keys[key_id].key; + + if (!key) { + printk(KERN_WARNING "%s: Received encrypted frame from " + "%pM using key %i, but key is not installed\n", + dev->name, src, key_id); + goto drop; + } + + orinoco_mic(priv->rx_tfm_mic, key->rx_mic, desc->addr1, src, + 0, /* priority or QoS? */ + skb->data, skb->len, &mic[0]); + + if (memcmp(mic, rxmic, + MICHAEL_MIC_LEN)) { + union iwreq_data wrqu; + struct iw_michaelmicfailure wxmic; + + printk(KERN_WARNING "%s: " + "Invalid Michael MIC in data frame from %pM, " + "using key %i\n", + dev->name, src, key_id); + + /* TODO: update stats */ + + /* Notify userspace */ + memset(&wxmic, 0, sizeof(wxmic)); + wxmic.flags = key_id & IW_MICFAILURE_KEY_ID; + wxmic.flags |= (desc->addr1[0] & 1) ? + IW_MICFAILURE_GROUP : IW_MICFAILURE_PAIRWISE; + wxmic.src_addr.sa_family = ARPHRD_ETHER; + memcpy(wxmic.src_addr.sa_data, src, ETH_ALEN); + + (void) orinoco_hw_get_tkip_iv(priv, key_id, + &wxmic.tsc[0]); + + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = sizeof(wxmic); + wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, + (char *) &wxmic); + + goto drop; + } + } + + /* Handle decapsulation + * In most cases, the firmware tell us about SNAP frames. + * For some reason, the SNAP frames sent by LinkSys APs + * are not properly recognised by most firmwares. + * So, check ourselves */ + if (length >= ENCAPS_OVERHEAD && + (((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_1042) || + ((status & HERMES_RXSTAT_MSGTYPE) == HERMES_RXSTAT_TUNNEL) || + is_ethersnap(skb->data))) { + /* These indicate a SNAP within 802.2 LLC within + 802.11 frame which we'll need to de-encapsulate to + the original EthernetII frame. */ + hdr = (struct ethhdr *)skb_push(skb, + ETH_HLEN - ENCAPS_OVERHEAD); + } else { + /* 802.3 frame - prepend 802.3 header as is */ + hdr = (struct ethhdr *)skb_push(skb, ETH_HLEN); + hdr->h_proto = htons(length); + } + memcpy(hdr->h_dest, desc->addr1, ETH_ALEN); + if (fc & IEEE80211_FCTL_FROMDS) + memcpy(hdr->h_source, desc->addr3, ETH_ALEN); + else + memcpy(hdr->h_source, desc->addr2, ETH_ALEN); + + skb->protocol = eth_type_trans(skb, dev); + skb->ip_summed = CHECKSUM_NONE; + if (fc & IEEE80211_FCTL_TODS) + skb->pkt_type = PACKET_OTHERHOST; + + /* Process the wireless stats if needed */ + orinoco_stat_gather(dev, skb, desc); + + /* Pass the packet to the networking stack */ + netif_rx(skb); + stats->rx_packets++; + stats->rx_bytes += length; + + return; + + drop: + dev_kfree_skb(skb); + stats->rx_errors++; + stats->rx_dropped++; +} + +static void orinoco_rx_isr_tasklet(unsigned long data) +{ + struct orinoco_private *priv = (struct orinoco_private *) data; + struct net_device *dev = priv->ndev; + struct orinoco_rx_data *rx_data, *temp; + struct hermes_rx_descriptor *desc; + struct sk_buff *skb; + unsigned long flags; + + /* orinoco_rx requires the driver lock, and we also need to + * protect priv->rx_list, so just hold the lock over the + * lot. + * + * If orinoco_lock fails, we've unplugged the card. In this + * case just abort. */ + if (orinoco_lock(priv, &flags) != 0) + return; + + /* extract desc and skb from queue */ + list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) { + desc = rx_data->desc; + skb = rx_data->skb; + list_del(&rx_data->list); + kfree(rx_data); + + orinoco_rx(dev, desc, skb); + + kfree(desc); + } + + orinoco_unlock(priv, &flags); +} + +/********************************************************************/ +/* Rx path (info frames) */ +/********************************************************************/ + +static void print_linkstatus(struct net_device *dev, u16 status) +{ + char *s; + + if (suppress_linkstatus) + return; + + switch (status) { + case HERMES_LINKSTATUS_NOT_CONNECTED: + s = "Not Connected"; + break; + case HERMES_LINKSTATUS_CONNECTED: + s = "Connected"; + break; + case HERMES_LINKSTATUS_DISCONNECTED: + s = "Disconnected"; + break; + case HERMES_LINKSTATUS_AP_CHANGE: + s = "AP Changed"; + break; + case HERMES_LINKSTATUS_AP_OUT_OF_RANGE: + s = "AP Out of Range"; + break; + case HERMES_LINKSTATUS_AP_IN_RANGE: + s = "AP In Range"; + break; + case HERMES_LINKSTATUS_ASSOC_FAILED: + s = "Association Failed"; + break; + default: + s = "UNKNOWN"; + } + + printk(KERN_DEBUG "%s: New link status: %s (%04x)\n", + dev->name, s, status); +} + +/* Search scan results for requested BSSID, join it if found */ +static void orinoco_join_ap(struct work_struct *work) +{ + struct orinoco_private *priv = + container_of(work, struct orinoco_private, join_work); + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + int err; + unsigned long flags; + struct join_req { + u8 bssid[ETH_ALEN]; + __le16 channel; + } __packed req; + const int atom_len = offsetof(struct prism2_scan_apinfo, atim); + struct prism2_scan_apinfo *atom = NULL; + int offset = 4; + int found = 0; + u8 *buf; + u16 len; + + /* Allocate buffer for scan results */ + buf = kmalloc(MAX_SCAN_LEN, GFP_KERNEL); + if (!buf) + return; + + if (orinoco_lock(priv, &flags) != 0) + goto fail_lock; + + /* Sanity checks in case user changed something in the meantime */ + if (!priv->bssid_fixed) + goto out; + + if (strlen(priv->desired_essid) == 0) + goto out; + + /* Read scan results from the firmware */ + err = hw->ops->read_ltv(hw, USER_BAP, + HERMES_RID_SCANRESULTSTABLE, + MAX_SCAN_LEN, &len, buf); + if (err) { + printk(KERN_ERR "%s: Cannot read scan results\n", + dev->name); + goto out; + } + + len = HERMES_RECLEN_TO_BYTES(len); + + /* Go through the scan results looking for the channel of the AP + * we were requested to join */ + for (; offset + atom_len <= len; offset += atom_len) { + atom = (struct prism2_scan_apinfo *) (buf + offset); + if (memcmp(&atom->bssid, priv->desired_bssid, ETH_ALEN) == 0) { + found = 1; + break; + } + } + + if (!found) { + DEBUG(1, "%s: Requested AP not found in scan results\n", + dev->name); + goto out; + } + + memcpy(req.bssid, priv->desired_bssid, ETH_ALEN); + req.channel = atom->channel; /* both are little-endian */ + err = HERMES_WRITE_RECORD(hw, USER_BAP, HERMES_RID_CNFJOINREQUEST, + &req); + if (err) + printk(KERN_ERR "%s: Error issuing join request\n", dev->name); + + out: + orinoco_unlock(priv, &flags); + + fail_lock: + kfree(buf); +} + +/* Send new BSSID to userspace */ +static void orinoco_send_bssid_wevent(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + union iwreq_data wrqu; + int err; + + err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENTBSSID, + ETH_ALEN, NULL, wrqu.ap_addr.sa_data); + if (err != 0) + return; + + wrqu.ap_addr.sa_family = ARPHRD_ETHER; + + /* Send event to user space */ + wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); +} + +static void orinoco_send_assocreqie_wevent(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + union iwreq_data wrqu; + int err; + u8 buf[88]; + u8 *ie; + + if (!priv->has_wpa) + return; + + err = hw->ops->read_ltv(hw, USER_BAP, HERMES_RID_CURRENT_ASSOC_REQ_INFO, + sizeof(buf), NULL, &buf); + if (err != 0) + return; + + ie = orinoco_get_wpa_ie(buf, sizeof(buf)); + if (ie) { + int rem = sizeof(buf) - (ie - &buf[0]); + wrqu.data.length = ie[1] + 2; + if (wrqu.data.length > rem) + wrqu.data.length = rem; + + if (wrqu.data.length) + /* Send event to user space */ + wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, ie); + } +} + +static void orinoco_send_assocrespie_wevent(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + union iwreq_data wrqu; + int err; + u8 buf[88]; /* TODO: verify max size or IW_GENERIC_IE_MAX */ + u8 *ie; + + if (!priv->has_wpa) + return; + + err = hw->ops->read_ltv(hw, USER_BAP, + HERMES_RID_CURRENT_ASSOC_RESP_INFO, + sizeof(buf), NULL, &buf); + if (err != 0) + return; + + ie = orinoco_get_wpa_ie(buf, sizeof(buf)); + if (ie) { + int rem = sizeof(buf) - (ie - &buf[0]); + wrqu.data.length = ie[1] + 2; + if (wrqu.data.length > rem) + wrqu.data.length = rem; + + if (wrqu.data.length) + /* Send event to user space */ + wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, ie); + } +} + +static void orinoco_send_wevents(struct work_struct *work) +{ + struct orinoco_private *priv = + container_of(work, struct orinoco_private, wevent_work); + unsigned long flags; + + if (orinoco_lock(priv, &flags) != 0) + return; + + orinoco_send_assocreqie_wevent(priv); + orinoco_send_assocrespie_wevent(priv); + orinoco_send_bssid_wevent(priv); + + orinoco_unlock(priv, &flags); +} + +static void qbuf_scan(struct orinoco_private *priv, void *buf, + int len, int type) +{ + struct orinoco_scan_data *sd; + unsigned long flags; + + sd = kmalloc(sizeof(*sd), GFP_ATOMIC); + if (!sd) + return; + + sd->buf = buf; + sd->len = len; + sd->type = type; + + spin_lock_irqsave(&priv->scan_lock, flags); + list_add_tail(&sd->list, &priv->scan_list); + spin_unlock_irqrestore(&priv->scan_lock, flags); + + schedule_work(&priv->process_scan); +} + +static void qabort_scan(struct orinoco_private *priv) +{ + struct orinoco_scan_data *sd; + unsigned long flags; + + sd = kmalloc(sizeof(*sd), GFP_ATOMIC); + if (!sd) + return; + + sd->len = -1; /* Abort */ + + spin_lock_irqsave(&priv->scan_lock, flags); + list_add_tail(&sd->list, &priv->scan_list); + spin_unlock_irqrestore(&priv->scan_lock, flags); + + schedule_work(&priv->process_scan); +} + +static void orinoco_process_scan_results(struct work_struct *work) +{ + struct orinoco_private *priv = + container_of(work, struct orinoco_private, process_scan); + struct orinoco_scan_data *sd, *temp; + unsigned long flags; + void *buf; + int len; + int type; + + spin_lock_irqsave(&priv->scan_lock, flags); + list_for_each_entry_safe(sd, temp, &priv->scan_list, list) { + + buf = sd->buf; + len = sd->len; + type = sd->type; + + list_del(&sd->list); + spin_unlock_irqrestore(&priv->scan_lock, flags); + kfree(sd); + + if (len > 0) { + if (type == HERMES_INQ_CHANNELINFO) + orinoco_add_extscan_result(priv, buf, len); + else + orinoco_add_hostscan_results(priv, buf, len); + + kfree(buf); + } else { + /* Either abort or complete the scan */ + orinoco_scan_done(priv, (len < 0)); + } + + spin_lock_irqsave(&priv->scan_lock, flags); + } + spin_unlock_irqrestore(&priv->scan_lock, flags); +} + +void __orinoco_ev_info(struct net_device *dev, struct hermes *hw) +{ + struct orinoco_private *priv = ndev_priv(dev); + u16 infofid; + struct { + __le16 len; + __le16 type; + } __packed info; + int len, type; + int err; + + /* This is an answer to an INQUIRE command that we did earlier, + * or an information "event" generated by the card + * The controller return to us a pseudo frame containing + * the information in question - Jean II */ + infofid = hermes_read_regn(hw, INFOFID); + + /* Read the info frame header - don't try too hard */ + err = hw->ops->bap_pread(hw, IRQ_BAP, &info, sizeof(info), + infofid, 0); + if (err) { + printk(KERN_ERR "%s: error %d reading info frame. " + "Frame dropped.\n", dev->name, err); + return; + } + + len = HERMES_RECLEN_TO_BYTES(le16_to_cpu(info.len)); + type = le16_to_cpu(info.type); + + switch (type) { + case HERMES_INQ_TALLIES: { + struct hermes_tallies_frame tallies; + struct iw_statistics *wstats = &priv->wstats; + + if (len > sizeof(tallies)) { + printk(KERN_WARNING "%s: Tallies frame too long (%d bytes)\n", + dev->name, len); + len = sizeof(tallies); + } + + err = hw->ops->bap_pread(hw, IRQ_BAP, &tallies, len, + infofid, sizeof(info)); + if (err) + break; + + /* Increment our various counters */ + /* wstats->discard.nwid - no wrong BSSID stuff */ + wstats->discard.code += + le16_to_cpu(tallies.RxWEPUndecryptable); + if (len == sizeof(tallies)) + wstats->discard.code += + le16_to_cpu(tallies.RxDiscards_WEPICVError) + + le16_to_cpu(tallies.RxDiscards_WEPExcluded); + wstats->discard.misc += + le16_to_cpu(tallies.TxDiscardsWrongSA); + wstats->discard.fragment += + le16_to_cpu(tallies.RxMsgInBadMsgFragments); + wstats->discard.retries += + le16_to_cpu(tallies.TxRetryLimitExceeded); + /* wstats->miss.beacon - no match */ + } + break; + case HERMES_INQ_LINKSTATUS: { + struct hermes_linkstatus linkstatus; + u16 newstatus; + int connected; + + if (priv->iw_mode == NL80211_IFTYPE_MONITOR) + break; + + if (len != sizeof(linkstatus)) { + printk(KERN_WARNING "%s: Unexpected size for linkstatus frame (%d bytes)\n", + dev->name, len); + break; + } + + err = hw->ops->bap_pread(hw, IRQ_BAP, &linkstatus, len, + infofid, sizeof(info)); + if (err) + break; + newstatus = le16_to_cpu(linkstatus.linkstatus); + + /* Symbol firmware uses "out of range" to signal that + * the hostscan frame can be requested. */ + if (newstatus == HERMES_LINKSTATUS_AP_OUT_OF_RANGE && + priv->firmware_type == FIRMWARE_TYPE_SYMBOL && + priv->has_hostscan && priv->scan_request) { + hermes_inquire(hw, HERMES_INQ_HOSTSCAN_SYMBOL); + break; + } + + connected = (newstatus == HERMES_LINKSTATUS_CONNECTED) + || (newstatus == HERMES_LINKSTATUS_AP_CHANGE) + || (newstatus == HERMES_LINKSTATUS_AP_IN_RANGE); + + if (connected) + netif_carrier_on(dev); + else if (!ignore_disconnect) + netif_carrier_off(dev); + + if (newstatus != priv->last_linkstatus) { + priv->last_linkstatus = newstatus; + print_linkstatus(dev, newstatus); + /* The info frame contains only one word which is the + * status (see hermes.h). The status is pretty boring + * in itself, that's why we export the new BSSID... + * Jean II */ + schedule_work(&priv->wevent_work); + } + } + break; + case HERMES_INQ_SCAN: + if (!priv->scan_request && priv->bssid_fixed && + priv->firmware_type == FIRMWARE_TYPE_INTERSIL) { + schedule_work(&priv->join_work); + break; + } + /* fall through */ + case HERMES_INQ_HOSTSCAN: + case HERMES_INQ_HOSTSCAN_SYMBOL: { + /* Result of a scanning. Contains information about + * cells in the vicinity - Jean II */ + unsigned char *buf; + + /* Sanity check */ + if (len > 4096) { + printk(KERN_WARNING "%s: Scan results too large (%d bytes)\n", + dev->name, len); + qabort_scan(priv); + break; + } + + /* Allocate buffer for results */ + buf = kmalloc(len, GFP_ATOMIC); + if (buf == NULL) { + /* No memory, so can't printk()... */ + qabort_scan(priv); + break; + } + + /* Read scan data */ + err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) buf, len, + infofid, sizeof(info)); + if (err) { + kfree(buf); + qabort_scan(priv); + break; + } + +#ifdef ORINOCO_DEBUG + { + int i; + printk(KERN_DEBUG "Scan result [%02X", buf[0]); + for (i = 1; i < (len * 2); i++) + printk(":%02X", buf[i]); + printk("]\n"); + } +#endif /* ORINOCO_DEBUG */ + + qbuf_scan(priv, buf, len, type); + } + break; + case HERMES_INQ_CHANNELINFO: + { + struct agere_ext_scan_info *bss; + + if (!priv->scan_request) { + printk(KERN_DEBUG "%s: Got chaninfo without scan, " + "len=%d\n", dev->name, len); + break; + } + + /* An empty result indicates that the scan is complete */ + if (len == 0) { + qbuf_scan(priv, NULL, len, type); + break; + } + + /* Sanity check */ + else if (len < (offsetof(struct agere_ext_scan_info, + data) + 2)) { + /* Drop this result now so we don't have to + * keep checking later */ + printk(KERN_WARNING + "%s: Ext scan results too short (%d bytes)\n", + dev->name, len); + break; + } + + bss = kmalloc(len, GFP_ATOMIC); + if (bss == NULL) + break; + + /* Read scan data */ + err = hw->ops->bap_pread(hw, IRQ_BAP, (void *) bss, len, + infofid, sizeof(info)); + if (err) + kfree(bss); + else + qbuf_scan(priv, bss, len, type); + + break; + } + case HERMES_INQ_SEC_STAT_AGERE: + /* Security status (Agere specific) */ + /* Ignore this frame for now */ + if (priv->firmware_type == FIRMWARE_TYPE_AGERE) + break; + /* fall through */ + default: + printk(KERN_DEBUG "%s: Unknown information frame received: " + "type 0x%04x, length %d\n", dev->name, type, len); + /* We don't actually do anything about it */ + break; + } +} +EXPORT_SYMBOL(__orinoco_ev_info); + +static void __orinoco_ev_infdrop(struct net_device *dev, struct hermes *hw) +{ + if (net_ratelimit()) + printk(KERN_DEBUG "%s: Information frame lost.\n", dev->name); +} + +/********************************************************************/ +/* Internal hardware control routines */ +/********************************************************************/ + +static int __orinoco_up(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + int err; + + netif_carrier_off(dev); /* just to make sure */ + + err = __orinoco_commit(priv); + if (err) { + printk(KERN_ERR "%s: Error %d configuring card\n", + dev->name, err); + return err; + } + + /* Fire things up again */ + hermes_set_irqmask(hw, ORINOCO_INTEN); + err = hermes_enable_port(hw, 0); + if (err) { + printk(KERN_ERR "%s: Error %d enabling MAC port\n", + dev->name, err); + return err; + } + + netif_start_queue(dev); + + return 0; +} + +static int __orinoco_down(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + int err; + + netif_stop_queue(dev); + + if (!priv->hw_unavailable) { + if (!priv->broken_disableport) { + err = hermes_disable_port(hw, 0); + if (err) { + /* Some firmwares (e.g. Intersil 1.3.x) seem + * to have problems disabling the port, oh + * well, too bad. */ + printk(KERN_WARNING "%s: Error %d disabling MAC port\n", + dev->name, err); + priv->broken_disableport = 1; + } + } + hermes_set_irqmask(hw, 0); + hermes_write_regn(hw, EVACK, 0xffff); + } + + orinoco_scan_done(priv, true); + + /* firmware will have to reassociate */ + netif_carrier_off(dev); + priv->last_linkstatus = 0xffff; + + return 0; +} + +static int orinoco_reinit_firmware(struct orinoco_private *priv) +{ + struct hermes *hw = &priv->hw; + int err; + + err = hw->ops->init(hw); + if (priv->do_fw_download && !err) { + err = orinoco_download(priv); + if (err) + priv->do_fw_download = 0; + } + if (!err) + err = orinoco_hw_allocate_fid(priv); + + return err; +} + +static int +__orinoco_set_multicast_list(struct net_device *dev) +{ + struct orinoco_private *priv = ndev_priv(dev); + int err = 0; + int promisc, mc_count; + + /* The Hermes doesn't seem to have an allmulti mode, so we go + * into promiscuous mode and let the upper levels deal. */ + if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || + (netdev_mc_count(dev) > MAX_MULTICAST(priv))) { + promisc = 1; + mc_count = 0; + } else { + promisc = 0; + mc_count = netdev_mc_count(dev); + } + + err = __orinoco_hw_set_multicast_list(priv, dev, mc_count, promisc); + + return err; +} + +/* This must be called from user context, without locks held - use + * schedule_work() */ +void orinoco_reset(struct work_struct *work) +{ + struct orinoco_private *priv = + container_of(work, struct orinoco_private, reset_work); + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + int err; + unsigned long flags; + + if (orinoco_lock(priv, &flags) != 0) + /* When the hardware becomes available again, whatever + * detects that is responsible for re-initializing + * it. So no need for anything further */ + return; + + netif_stop_queue(dev); + + /* Shut off interrupts. Depending on what state the hardware + * is in, this might not work, but we'll try anyway */ + hermes_set_irqmask(hw, 0); + hermes_write_regn(hw, EVACK, 0xffff); + + priv->hw_unavailable++; + priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */ + netif_carrier_off(dev); + + orinoco_unlock(priv, &flags); + + /* Scanning support: Notify scan cancellation */ + orinoco_scan_done(priv, true); + + if (priv->hard_reset) { + err = (*priv->hard_reset)(priv); + if (err) { + printk(KERN_ERR "%s: orinoco_reset: Error %d " + "performing hard reset\n", dev->name, err); + goto disable; + } + } + + err = orinoco_reinit_firmware(priv); + if (err) { + printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n", + dev->name, err); + goto disable; + } + + /* This has to be called from user context */ + orinoco_lock_irq(priv); + + priv->hw_unavailable--; + + /* priv->open or priv->hw_unavailable might have changed while + * we dropped the lock */ + if (priv->open && (!priv->hw_unavailable)) { + err = __orinoco_up(priv); + if (err) { + printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n", + dev->name, err); + } else + dev->trans_start = jiffies; + } + + orinoco_unlock_irq(priv); + + return; + disable: + hermes_set_irqmask(hw, 0); + netif_device_detach(dev); + printk(KERN_ERR "%s: Device has been disabled!\n", dev->name); +} + +static int __orinoco_commit(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + int err = 0; + + /* If we've called commit, we are reconfiguring or bringing the + * interface up. Maintaining countermeasures across this would + * be confusing, so note that we've disabled them. The port will + * be enabled later in orinoco_commit or __orinoco_up. */ + priv->tkip_cm_active = 0; + + err = orinoco_hw_program_rids(priv); + + /* FIXME: what about netif_tx_lock */ + (void) __orinoco_set_multicast_list(dev); + + return err; +} + +/* Ensures configuration changes are applied. May result in a reset. + * The caller should hold priv->lock + */ +int orinoco_commit(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + int err; + + if (priv->broken_disableport) { + schedule_work(&priv->reset_work); + return 0; + } + + err = hermes_disable_port(hw, 0); + if (err) { + printk(KERN_WARNING "%s: Unable to disable port " + "while reconfiguring card\n", dev->name); + priv->broken_disableport = 1; + goto out; + } + + err = __orinoco_commit(priv); + if (err) { + printk(KERN_WARNING "%s: Unable to reconfigure card\n", + dev->name); + goto out; + } + + err = hermes_enable_port(hw, 0); + if (err) { + printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n", + dev->name); + goto out; + } + + out: + if (err) { + printk(KERN_WARNING "%s: Resetting instead...\n", dev->name); + schedule_work(&priv->reset_work); + err = 0; + } + return err; +} + +/********************************************************************/ +/* Interrupt handler */ +/********************************************************************/ + +static void __orinoco_ev_tick(struct net_device *dev, struct hermes *hw) +{ + printk(KERN_DEBUG "%s: TICK\n", dev->name); +} + +static void __orinoco_ev_wterr(struct net_device *dev, struct hermes *hw) +{ + /* This seems to happen a fair bit under load, but ignoring it + seems to work fine...*/ + printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n", + dev->name); +} + +irqreturn_t orinoco_interrupt(int irq, void *dev_id) +{ + struct orinoco_private *priv = dev_id; + struct net_device *dev = priv->ndev; + struct hermes *hw = &priv->hw; + int count = MAX_IRQLOOPS_PER_IRQ; + u16 evstat, events; + /* These are used to detect a runaway interrupt situation. + * + * If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy, + * we panic and shut down the hardware + */ + /* jiffies value the last time we were called */ + static int last_irq_jiffy; /* = 0 */ + static int loops_this_jiffy; /* = 0 */ + unsigned long flags; + + if (orinoco_lock(priv, &flags) != 0) { + /* If hw is unavailable - we don't know if the irq was + * for us or not */ + return IRQ_HANDLED; + } + + evstat = hermes_read_regn(hw, EVSTAT); + events = evstat & hw->inten; + if (!events) { + orinoco_unlock(priv, &flags); + return IRQ_NONE; + } + + if (jiffies != last_irq_jiffy) + loops_this_jiffy = 0; + last_irq_jiffy = jiffies; + + while (events && count--) { + if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) { + printk(KERN_WARNING "%s: IRQ handler is looping too " + "much! Resetting.\n", dev->name); + /* Disable interrupts for now */ + hermes_set_irqmask(hw, 0); + schedule_work(&priv->reset_work); + break; + } + + /* Check the card hasn't been removed */ + if (!hermes_present(hw)) { + DEBUG(0, "orinoco_interrupt(): card removed\n"); + break; + } + + if (events & HERMES_EV_TICK) + __orinoco_ev_tick(dev, hw); + if (events & HERMES_EV_WTERR) + __orinoco_ev_wterr(dev, hw); + if (events & HERMES_EV_INFDROP) + __orinoco_ev_infdrop(dev, hw); + if (events & HERMES_EV_INFO) + __orinoco_ev_info(dev, hw); + if (events & HERMES_EV_RX) + __orinoco_ev_rx(dev, hw); + if (events & HERMES_EV_TXEXC) + __orinoco_ev_txexc(dev, hw); + if (events & HERMES_EV_TX) + __orinoco_ev_tx(dev, hw); + if (events & HERMES_EV_ALLOC) + __orinoco_ev_alloc(dev, hw); + + hermes_write_regn(hw, EVACK, evstat); + + evstat = hermes_read_regn(hw, EVSTAT); + events = evstat & hw->inten; + } + + orinoco_unlock(priv, &flags); + return IRQ_HANDLED; +} +EXPORT_SYMBOL(orinoco_interrupt); + +/********************************************************************/ +/* Power management */ +/********************************************************************/ +#if defined(CONFIG_PM_SLEEP) && !defined(CONFIG_HERMES_CACHE_FW_ON_INIT) +static int orinoco_pm_notifier(struct notifier_block *notifier, + unsigned long pm_event, + void *unused) +{ + struct orinoco_private *priv = container_of(notifier, + struct orinoco_private, + pm_notifier); + + /* All we need to do is cache the firmware before suspend, and + * release it when we come out. + * + * Only need to do this if we're downloading firmware. */ + if (!priv->do_fw_download) + return NOTIFY_DONE; + + switch (pm_event) { + case PM_HIBERNATION_PREPARE: + case PM_SUSPEND_PREPARE: + orinoco_cache_fw(priv, 0); + break; + + case PM_POST_RESTORE: + /* Restore from hibernation failed. We need to clean + * up in exactly the same way, so fall through. */ + case PM_POST_HIBERNATION: + case PM_POST_SUSPEND: + orinoco_uncache_fw(priv); + break; + + case PM_RESTORE_PREPARE: + default: + break; + } + + return NOTIFY_DONE; +} + +static void orinoco_register_pm_notifier(struct orinoco_private *priv) +{ + priv->pm_notifier.notifier_call = orinoco_pm_notifier; + register_pm_notifier(&priv->pm_notifier); +} + +static void orinoco_unregister_pm_notifier(struct orinoco_private *priv) +{ + unregister_pm_notifier(&priv->pm_notifier); +} +#else /* !PM_SLEEP || HERMES_CACHE_FW_ON_INIT */ +#define orinoco_register_pm_notifier(priv) do { } while (0) +#define orinoco_unregister_pm_notifier(priv) do { } while (0) +#endif + +/********************************************************************/ +/* Initialization */ +/********************************************************************/ + +int orinoco_init(struct orinoco_private *priv) +{ + struct device *dev = priv->dev; + struct wiphy *wiphy = priv_to_wiphy(priv); + struct hermes *hw = &priv->hw; + int err = 0; + + /* No need to lock, the hw_unavailable flag is already set in + * alloc_orinocodev() */ + priv->nicbuf_size = IEEE80211_MAX_FRAME_LEN + ETH_HLEN; + + /* Initialize the firmware */ + err = hw->ops->init(hw); + if (err != 0) { + dev_err(dev, "Failed to initialize firmware (err = %d)\n", + err); + goto out; + } + + err = determine_fw_capabilities(priv, wiphy->fw_version, + sizeof(wiphy->fw_version), + &wiphy->hw_version); + if (err != 0) { + dev_err(dev, "Incompatible firmware, aborting\n"); + goto out; + } + + if (priv->do_fw_download) { +#ifdef CONFIG_HERMES_CACHE_FW_ON_INIT + orinoco_cache_fw(priv, 0); +#endif + + err = orinoco_download(priv); + if (err) + priv->do_fw_download = 0; + + /* Check firmware version again */ + err = determine_fw_capabilities(priv, wiphy->fw_version, + sizeof(wiphy->fw_version), + &wiphy->hw_version); + if (err != 0) { + dev_err(dev, "Incompatible firmware, aborting\n"); + goto out; + } + } + + if (priv->has_port3) + dev_info(dev, "Ad-hoc demo mode supported\n"); + if (priv->has_ibss) + dev_info(dev, "IEEE standard IBSS ad-hoc mode supported\n"); + if (priv->has_wep) + dev_info(dev, "WEP supported, %s-bit key\n", + priv->has_big_wep ? "104" : "40"); + if (priv->has_wpa) { + dev_info(dev, "WPA-PSK supported\n"); + if (orinoco_mic_init(priv)) { + dev_err(dev, "Failed to setup MIC crypto algorithm. " + "Disabling WPA support\n"); + priv->has_wpa = 0; + } + } + + err = orinoco_hw_read_card_settings(priv, wiphy->perm_addr); + if (err) + goto out; + + err = orinoco_hw_allocate_fid(priv); + if (err) { + dev_err(dev, "Failed to allocate NIC buffer!\n"); + goto out; + } + + /* Set up the default configuration */ + priv->iw_mode = NL80211_IFTYPE_STATION; + /* By default use IEEE/IBSS ad-hoc mode if we have it */ + priv->prefer_port3 = priv->has_port3 && (!priv->has_ibss); + set_port_type(priv); + priv->channel = 0; /* use firmware default */ + + priv->promiscuous = 0; + priv->encode_alg = ORINOCO_ALG_NONE; + priv->tx_key = 0; + priv->wpa_enabled = 0; + priv->tkip_cm_active = 0; + priv->key_mgmt = 0; + priv->wpa_ie_len = 0; + priv->wpa_ie = NULL; + + if (orinoco_wiphy_register(wiphy)) { + err = -ENODEV; + goto out; + } + + /* Make the hardware available, as long as it hasn't been + * removed elsewhere (e.g. by PCMCIA hot unplug) */ + orinoco_lock_irq(priv); + priv->hw_unavailable--; + orinoco_unlock_irq(priv); + + dev_dbg(dev, "Ready\n"); + + out: + return err; +} +EXPORT_SYMBOL(orinoco_init); + +static const struct net_device_ops orinoco_netdev_ops = { + .ndo_open = orinoco_open, + .ndo_stop = orinoco_stop, + .ndo_start_xmit = orinoco_xmit, + .ndo_set_rx_mode = orinoco_set_multicast_list, + .ndo_change_mtu = orinoco_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, + .ndo_tx_timeout = orinoco_tx_timeout, + .ndo_get_stats = orinoco_get_stats, +}; + +/* Allocate private data. + * + * This driver has a number of structures associated with it + * netdev - Net device structure for each network interface + * wiphy - structure associated with wireless phy + * wireless_dev (wdev) - structure for each wireless interface + * hw - structure for hermes chip info + * card - card specific structure for use by the card driver + * (airport, orinoco_cs) + * priv - orinoco private data + * device - generic linux device structure + * + * +---------+ +---------+ + * | wiphy | | netdev | + * | +-------+ | +-------+ + * | | priv | | | wdev | + * | | +-----+ +-+-------+ + * | | | hw | + * | +-+-----+ + * | | card | + * +-+-------+ + * + * priv has a link to netdev and device + * wdev has a link to wiphy + */ +struct orinoco_private +*alloc_orinocodev(int sizeof_card, + struct device *device, + int (*hard_reset)(struct orinoco_private *), + int (*stop_fw)(struct orinoco_private *, int)) +{ + struct orinoco_private *priv; + struct wiphy *wiphy; + + /* allocate wiphy + * NOTE: We only support a single virtual interface + * but this may change when monitor mode is added + */ + wiphy = wiphy_new(&orinoco_cfg_ops, + sizeof(struct orinoco_private) + sizeof_card); + if (!wiphy) + return NULL; + + priv = wiphy_priv(wiphy); + priv->dev = device; + + if (sizeof_card) + priv->card = (void *)((unsigned long)priv + + sizeof(struct orinoco_private)); + else + priv->card = NULL; + + orinoco_wiphy_init(wiphy); + +#ifdef WIRELESS_SPY + priv->wireless_data.spy_data = &priv->spy_data; +#endif + + /* Set up default callbacks */ + priv->hard_reset = hard_reset; + priv->stop_fw = stop_fw; + + spin_lock_init(&priv->lock); + priv->open = 0; + priv->hw_unavailable = 1; /* orinoco_init() must clear this + * before anything else touches the + * hardware */ + INIT_WORK(&priv->reset_work, orinoco_reset); + INIT_WORK(&priv->join_work, orinoco_join_ap); + INIT_WORK(&priv->wevent_work, orinoco_send_wevents); + + INIT_LIST_HEAD(&priv->rx_list); + tasklet_init(&priv->rx_tasklet, orinoco_rx_isr_tasklet, + (unsigned long) priv); + + spin_lock_init(&priv->scan_lock); + INIT_LIST_HEAD(&priv->scan_list); + INIT_WORK(&priv->process_scan, orinoco_process_scan_results); + + priv->last_linkstatus = 0xffff; + +#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP) + priv->cached_pri_fw = NULL; + priv->cached_fw = NULL; +#endif + + /* Register PM notifiers */ + orinoco_register_pm_notifier(priv); + + return priv; +} +EXPORT_SYMBOL(alloc_orinocodev); + +/* We can only support a single interface. We provide a separate + * function to set it up to distinguish between hardware + * initialisation and interface setup. + * + * The base_addr and irq parameters are passed on to netdev for use + * with SIOCGIFMAP. + */ +int orinoco_if_add(struct orinoco_private *priv, + unsigned long base_addr, + unsigned int irq, + const struct net_device_ops *ops) +{ + struct wiphy *wiphy = priv_to_wiphy(priv); + struct wireless_dev *wdev; + struct net_device *dev; + int ret; + + dev = alloc_etherdev(sizeof(struct wireless_dev)); + + if (!dev) + return -ENOMEM; + + /* Initialise wireless_dev */ + wdev = netdev_priv(dev); + wdev->wiphy = wiphy; + wdev->iftype = NL80211_IFTYPE_STATION; + + /* Setup / override net_device fields */ + dev->ieee80211_ptr = wdev; + dev->watchdog_timeo = HZ; /* 1 second timeout */ + dev->wireless_handlers = &orinoco_handler_def; +#ifdef WIRELESS_SPY + dev->wireless_data = &priv->wireless_data; +#endif + /* Default to standard ops if not set */ + if (ops) + dev->netdev_ops = ops; + else + dev->netdev_ops = &orinoco_netdev_ops; + + /* we use the default eth_mac_addr for setting the MAC addr */ + + /* Reserve space in skb for the SNAP header */ + dev->needed_headroom = ENCAPS_OVERHEAD; + + netif_carrier_off(dev); + + memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN); + + dev->base_addr = base_addr; + dev->irq = irq; + + SET_NETDEV_DEV(dev, priv->dev); + ret = register_netdev(dev); + if (ret) + goto fail; + + priv->ndev = dev; + + /* Report what we've done */ + dev_dbg(priv->dev, "Registerred interface %s.\n", dev->name); + + return 0; + + fail: + free_netdev(dev); + return ret; +} +EXPORT_SYMBOL(orinoco_if_add); + +void orinoco_if_del(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + + unregister_netdev(dev); + free_netdev(dev); +} +EXPORT_SYMBOL(orinoco_if_del); + +void free_orinocodev(struct orinoco_private *priv) +{ + struct wiphy *wiphy = priv_to_wiphy(priv); + struct orinoco_rx_data *rx_data, *temp; + struct orinoco_scan_data *sd, *sdtemp; + + /* If the tasklet is scheduled when we call tasklet_kill it + * will run one final time. However the tasklet will only + * drain priv->rx_list if the hw is still available. */ + tasklet_kill(&priv->rx_tasklet); + + /* Explicitly drain priv->rx_list */ + list_for_each_entry_safe(rx_data, temp, &priv->rx_list, list) { + list_del(&rx_data->list); + + dev_kfree_skb(rx_data->skb); + kfree(rx_data->desc); + kfree(rx_data); + } + + cancel_work_sync(&priv->process_scan); + /* Explicitly drain priv->scan_list */ + list_for_each_entry_safe(sd, sdtemp, &priv->scan_list, list) { + list_del(&sd->list); + + if (sd->len > 0) + kfree(sd->buf); + kfree(sd); + } + + orinoco_unregister_pm_notifier(priv); + orinoco_uncache_fw(priv); + + priv->wpa_ie_len = 0; + kfree(priv->wpa_ie); + orinoco_mic_free(priv); + wiphy_free(wiphy); +} +EXPORT_SYMBOL(free_orinocodev); + +int orinoco_up(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + unsigned long flags; + int err; + + priv->hw.ops->lock_irqsave(&priv->lock, &flags); + + err = orinoco_reinit_firmware(priv); + if (err) { + printk(KERN_ERR "%s: Error %d re-initializing firmware\n", + dev->name, err); + goto exit; + } + + netif_device_attach(dev); + priv->hw_unavailable--; + + if (priv->open && !priv->hw_unavailable) { + err = __orinoco_up(priv); + if (err) + printk(KERN_ERR "%s: Error %d restarting card\n", + dev->name, err); + } + +exit: + priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); + + return 0; +} +EXPORT_SYMBOL(orinoco_up); + +void orinoco_down(struct orinoco_private *priv) +{ + struct net_device *dev = priv->ndev; + unsigned long flags; + int err; + + priv->hw.ops->lock_irqsave(&priv->lock, &flags); + err = __orinoco_down(priv); + if (err) + printk(KERN_WARNING "%s: Error %d downing interface\n", + dev->name, err); + + netif_device_detach(dev); + priv->hw_unavailable++; + priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); +} +EXPORT_SYMBOL(orinoco_down); + +/********************************************************************/ +/* Module initialization */ +/********************************************************************/ + +/* Can't be declared "const" or the whole __initdata section will + * become const */ +static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION + " (David Gibson <hermes@gibson.dropbear.id.au>, " + "Pavel Roskin <proski@gnu.org>, et al)"; + +static int __init init_orinoco(void) +{ + printk(KERN_DEBUG "%s\n", version); + return 0; +} + +static void __exit exit_orinoco(void) +{ +} + +module_init(init_orinoco); +module_exit(exit_orinoco); |