From: Paul Fulghum Replace syncppp interface with generic HDLC interface. Generic HDLC provides superset of syncppp function. Signed-off-by: Paul Fulghum Signed-off-by: Andrew Morton --- 25-akpm/drivers/char/pcmcia/synclink_cs.c | 561 ++++++++++++++++++++---------- 1 files changed, 374 insertions(+), 187 deletions(-) diff -puN drivers/char/pcmcia/synclink_cs.c~synclink_csc-replace-syncppp-with-genhdlc drivers/char/pcmcia/synclink_cs.c --- 25/drivers/char/pcmcia/synclink_cs.c~synclink_csc-replace-syncppp-with-genhdlc 2004-08-16 11:41:12.720958792 -0700 +++ 25-akpm/drivers/char/pcmcia/synclink_cs.c 2004-08-16 11:41:12.730957272 -0700 @@ -1,7 +1,7 @@ /* * linux/drivers/char/pcmcia/synclink_cs.c * - * $Id: synclink_cs.c,v 4.22 2004/06/01 20:27:46 paulkf Exp $ + * $Id: synclink_cs.c,v 4.26 2004/08/11 19:30:02 paulkf Exp $ * * Device driver for Microgate SyncLink PC Card * multiprotocol serial adapter. @@ -68,6 +68,7 @@ #include #include #include +#include #include #include @@ -76,12 +77,8 @@ #include #include -#ifdef CONFIG_SYNCLINK_SYNCPPP_MODULE -#define CONFIG_SYNCLINK_SYNCPPP 1 -#endif - -#ifdef CONFIG_SYNCLINK_SYNCPPP -#include +#ifdef CONFIG_HDLC_MODULE +#define CONFIG_HDLC 1 #endif #define GET_USER(error,value,addr) error = get_user(value,addr) @@ -239,12 +236,11 @@ typedef struct _mgslpc_info { int netcount; int dosyncppp; spinlock_t netlock; -#ifdef CONFIG_SYNCLINK_SYNCPPP - struct ppp_device pppdev; - char netname[10]; + +#ifdef CONFIG_HDLC struct net_device *netdev; - struct net_device_stats netstats; #endif + } MGSLPC_INFO; #define MGSLPC_MAGIC 0x5402 @@ -262,7 +258,7 @@ typedef struct _mgslpc_info { * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. */ #undef PVR - + #define RXFIFO 0 #define TXFIFO 0 #define STAR 0x20 @@ -398,18 +394,12 @@ static void tx_timeout(unsigned long con static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg); -#ifdef CONFIG_SYNCLINK_SYNCPPP -/* SPPP/HDLC stuff */ -static void mgslpc_sppp_init(MGSLPC_INFO *info); -static void mgslpc_sppp_delete(MGSLPC_INFO *info); -static int mgslpc_sppp_open(struct net_device *d); -static int mgslpc_sppp_close(struct net_device *d); -static void mgslpc_sppp_tx_timeout(struct net_device *d); -static int mgslpc_sppp_tx(struct sk_buff *skb, struct net_device *d); -static void mgslpc_sppp_rx_done(MGSLPC_INFO *info, char *buf, int size); -static void mgslpc_sppp_tx_done(MGSLPC_INFO *info); -static int mgslpc_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); -struct net_device_stats *mgslpc_net_stats(struct net_device *dev); +#ifdef CONFIG_HDLC +#define dev_to_port(D) (dev_to_hdlc(D)->priv) +static void hdlcdev_tx_done(MGSLPC_INFO *info); +static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); +static int hdlcdev_init(MGSLPC_INFO *info); +static void hdlcdev_exit(MGSLPC_INFO *info); #endif static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); @@ -494,7 +484,7 @@ MODULE_PARM(dosyncppp,"1-" __MODULE_STRI MODULE_LICENSE("GPL"); static char *driver_name = "SyncLink PC Card driver"; -static char *driver_version = "$Revision: 4.22 $"; +static char *driver_version = "$Revision: 4.26 $"; static struct tty_driver *serial_driver; @@ -1163,9 +1153,9 @@ void tx_done(MGSLPC_INFO *info) info->drop_rts_on_tx_done = 0; } -#ifdef CONFIG_SYNCLINK_SYNCPPP +#ifdef CONFIG_HDLC if (info->netcount) - mgslpc_sppp_tx_done(info); + hdlcdev_tx_done(info); else #endif { @@ -1271,13 +1261,13 @@ void dcd_change(MGSLPC_INFO *info) info->icount.dcd++; if (info->serial_signals & SerialSignal_DCD) { info->input_signal_events.dcd_up++; -#ifdef CONFIG_SYNCLINK_SYNCPPP - if (info->netcount) - sppp_reopen(info->netdev); -#endif } else info->input_signal_events.dcd_down++; +#ifdef CONFIG_HDLC + if (info->netcount) + hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, info->netdev); +#endif wake_up_interruptible(&info->status_event_wait_q); wake_up_interruptible(&info->event_wait_q); @@ -2876,7 +2866,7 @@ static int mgslpc_open(struct tty_struct cleanup: if (retval) { if (tty->count == 1) - info->tty = NULL;/* tty layer will release tty struct */ + info->tty = NULL; /* tty layer will release tty struct */ if(info->count) info->count--; } @@ -2931,7 +2921,7 @@ static inline int line_info(char *buf, M if (info->icount.rxover) ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover); if (info->icount.rxcrc) - ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxcrc); + ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc); } else { ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d", info->icount.tx, info->icount.rx); @@ -3070,12 +3060,8 @@ void mgslpc_add_device(MGSLPC_INFO *info printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n", info->device_name, info->io_base, info->irq_level); - -#ifdef CONFIG_SYNCLINK_SYNCPPP -#ifdef MODULE - if (info->dosyncppp) -#endif - mgslpc_sppp_init(info); +#ifdef CONFIG_HDLC + hdlcdev_init(info); #endif } @@ -3090,9 +3076,8 @@ void mgslpc_remove_device(MGSLPC_INFO *r last->next_device = info->next_device; else mgslpc_device_list = info->next_device; -#ifdef CONFIG_SYNCLINK_SYNCPPP - if (info->dosyncppp) - mgslpc_sppp_delete(info); +#ifdef CONFIG_HDLC + hdlcdev_exit(info); #endif release_resources(info); kfree(info); @@ -4021,9 +4006,12 @@ int rx_get_frame(MGSLPC_INFO *info) return_frame = 1; } framesize = 0; -#ifdef CONFIG_SYNCLINK_SYNCPPP - info->netstats.rx_errors++; - info->netstats.rx_frame_errors++; +#ifdef CONFIG_HDLC + { + struct net_device_stats *stats = hdlc_stats(info->netdev); + stats->rx_errors++; + stats->rx_frame_errors++; + } #endif } else return_frame = 1; @@ -4052,11 +4040,9 @@ int rx_get_frame(MGSLPC_INFO *info) ++framesize; } -#ifdef CONFIG_SYNCLINK_SYNCPPP - if (info->netcount) { - /* pass frame to syncppp device */ - mgslpc_sppp_rx_done(info, buf->data, framesize); - } +#ifdef CONFIG_HDLC + if (info->netcount) + hdlcdev_rx(info, buf->data, framesize); else #endif { @@ -4215,88 +4201,134 @@ void tx_timeout(unsigned long context) spin_unlock_irqrestore(&info->lock,flags); -#ifdef CONFIG_SYNCLINK_SYNCPPP +#ifdef CONFIG_HDLC if (info->netcount) - mgslpc_sppp_tx_done(info); + hdlcdev_tx_done(info); else #endif bh_transmit(info); } -#ifdef CONFIG_SYNCLINK_SYNCPPP -/* syncppp net device routines +#ifdef CONFIG_HDLC + +/** + * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) + * set encoding and frame check sequence (FCS) options + * + * dev pointer to network device structure + * encoding serial encoding setting + * parity FCS setting + * + * returns 0 if success, otherwise error code */ - -static void mgslpc_setup(struct net_device *dev) +static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, + unsigned short parity) { - dev->open = mgslpc_sppp_open; - dev->stop = mgslpc_sppp_close; - dev->hard_start_xmit = mgslpc_sppp_tx; - dev->do_ioctl = mgslpc_sppp_ioctl; - dev->get_stats = mgslpc_net_stats; - dev->tx_timeout = mgslpc_sppp_tx_timeout; - dev->watchdog_timeo = 10*HZ; -} + MGSLPC_INFO *info = dev_to_port(dev); + unsigned char new_encoding; + unsigned short new_crctype; -void mgslpc_sppp_init(MGSLPC_INFO *info) -{ - struct net_device *d; + /* return error if TTY interface open */ + if (info->count) + return -EBUSY; - sprintf(info->netname,"mgslp%d",info->line); - - d = alloc_netdev(0, info->netname, mgslpc_setup); - if (!d) { - printk(KERN_WARNING "%s: alloc_netdev failed.\n", - info->netname); - return; + switch (encoding) + { + case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; + case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; + case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; + case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; + case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; + default: return -EINVAL; } - info->if_ptr = &info->pppdev; - info->netdev = info->pppdev.dev = d; - - d->base_addr = info->io_base; - d->irq = info->irq_level; - d->priv = info; - - sppp_attach(&info->pppdev); - mgslpc_setup(d); - - if (register_netdev(d)) { - printk(KERN_WARNING "%s: register_netdev failed.\n", d->name); - sppp_detach(info->netdev); - info->netdev = NULL; - info->pppdev.dev = NULL; - free_netdev(d); - return; + switch (parity) + { + case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; + case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; + case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; + default: return -EINVAL; } - if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_sppp_init()\n"); + info->params.encoding = new_encoding; + info->params.crc_type = new_crctype;; + + /* if network interface up, reprogram hardware */ + if (info->netcount) + mgslpc_program_hw(info); + + return 0; } -void mgslpc_sppp_delete(MGSLPC_INFO *info) +/** + * called by generic HDLC layer to send frame + * + * skb socket buffer containing HDLC frame + * dev pointer to network device structure + * + * returns 0 if success, otherwise error code + */ +static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev) { + MGSLPC_INFO *info = dev_to_port(dev); + struct net_device_stats *stats = hdlc_stats(dev); + unsigned long flags; + if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_sppp_delete(%s)\n",info->netname); - unregister_netdev(info->netdev); - sppp_detach(info->netdev); - free_netdev(info->netdev); - info->netdev = NULL; - info->pppdev.dev = NULL; + printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); + + /* stop sending until this frame completes */ + netif_stop_queue(dev); + + /* copy data to device buffers */ + memcpy(info->tx_buf, skb->data, skb->len); + info->tx_get = 0; + info->tx_put = info->tx_count = skb->len; + + /* update network statistics */ + stats->tx_packets++; + stats->tx_bytes += skb->len; + + /* done with socket buffer, so free it */ + dev_kfree_skb(skb); + + /* save start time for transmit timeout detection */ + dev->trans_start = jiffies; + + /* start hardware transmitter if necessary */ + spin_lock_irqsave(&info->lock,flags); + if (!info->tx_active) + tx_start(info); + spin_unlock_irqrestore(&info->lock,flags); + + return 0; } -int mgslpc_sppp_open(struct net_device *d) +/** + * called by network layer when interface enabled + * claim resources and initialize hardware + * + * dev pointer to network device structure + * + * returns 0 if success, otherwise error code + */ +static int hdlcdev_open(struct net_device *dev) { - MGSLPC_INFO *info = d->priv; - int err; + MGSLPC_INFO *info = dev_to_port(dev); + int rc; unsigned long flags; if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_sppp_open(%s)\n",info->netname); + printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); + + /* generic HDLC layer open processing */ + if ((rc = hdlc_open(dev))) + return rc; + /* arbitrate between network and tty opens */ spin_lock_irqsave(&info->netlock, flags); if (info->count != 0 || info->netcount != 0) { - printk(KERN_WARNING "%s: sppp_open returning busy\n", info->netname); + printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); spin_unlock_irqrestore(&info->netlock, flags); return -EBUSY; } @@ -4304,142 +4336,297 @@ int mgslpc_sppp_open(struct net_device * spin_unlock_irqrestore(&info->netlock, flags); /* claim resources and init adapter */ - if ((err = startup(info)) != 0) - goto open_fail; - - /* allow syncppp module to do open processing */ - if ((err = sppp_open(d)) != 0) { - shutdown(info); - goto open_fail; + if ((rc = startup(info)) != 0) { + spin_lock_irqsave(&info->netlock, flags); + info->netcount=0; + spin_unlock_irqrestore(&info->netlock, flags); + return rc; } + /* assert DTR and RTS, apply hardware settings */ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; mgslpc_program_hw(info); - d->trans_start = jiffies; - netif_start_queue(d); - return 0; + /* enable network layer transmit */ + dev->trans_start = jiffies; + netif_start_queue(dev); -open_fail: - spin_lock_irqsave(&info->netlock, flags); - info->netcount=0; - spin_unlock_irqrestore(&info->netlock, flags); - return err; + /* inform generic HDLC layer of current DCD status */ + spin_lock_irqsave(&info->lock, flags); + get_signals(info); + spin_unlock_irqrestore(&info->lock, flags); + hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev); + + return 0; } -void mgslpc_sppp_tx_timeout(struct net_device *dev) +/** + * called by network layer when interface is disabled + * shutdown hardware and release resources + * + * dev pointer to network device structure + * + * returns 0 if success, otherwise error code + */ +static int hdlcdev_close(struct net_device *dev) { - MGSLPC_INFO *info = dev->priv; + MGSLPC_INFO *info = dev_to_port(dev); unsigned long flags; if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_sppp_tx_timeout(%s)\n",info->netname); + printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); - info->netstats.tx_errors++; - info->netstats.tx_aborted_errors++; + netif_stop_queue(dev); - spin_lock_irqsave(&info->lock,flags); - tx_stop(info); - spin_unlock_irqrestore(&info->lock,flags); + /* shutdown adapter and release resources */ + shutdown(info); - netif_wake_queue(dev); + hdlc_close(dev); + + spin_lock_irqsave(&info->netlock, flags); + info->netcount=0; + spin_unlock_irqrestore(&info->netlock, flags); + + return 0; } -int mgslpc_sppp_tx(struct sk_buff *skb, struct net_device *dev) +/** + * called by network layer to process IOCTL call to network device + * + * dev pointer to network device structure + * ifr pointer to network interface request structure + * cmd IOCTL command code + * + * returns 0 if success, otherwise error code + */ +static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { - MGSLPC_INFO *info = dev->priv; - unsigned long flags; + const size_t size = sizeof(sync_serial_settings); + sync_serial_settings new_line; + sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; + MGSLPC_INFO *info = dev_to_port(dev); + unsigned int flags; if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_sppp_tx(%s)\n",info->netname); + printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); - netif_stop_queue(dev); + /* return error if TTY interface open */ + if (info->count) + return -EBUSY; - info->tx_count = skb->len; + if (cmd != SIOCWANDEV) + return hdlc_ioctl(dev, ifr, cmd); - memcpy(info->tx_buf, skb->data, skb->len); - info->tx_get = 0; - info->tx_put = info->tx_count = skb->len; + switch(ifr->ifr_settings.type) { + case IF_GET_IFACE: /* return current sync_serial_settings */ - info->netstats.tx_packets++; - info->netstats.tx_bytes += skb->len; - dev_kfree_skb(skb); + ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; + if (ifr->ifr_settings.size < size) { + ifr->ifr_settings.size = size; /* data size wanted */ + return -ENOBUFS; + } - dev->trans_start = jiffies; + flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | + HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | + HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | + HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); + + switch (flags){ + case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; + case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; + case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; + case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; + default: new_line.clock_type = CLOCK_DEFAULT; + } - spin_lock_irqsave(&info->lock,flags); - if (!info->tx_active) - tx_start(info); - spin_unlock_irqrestore(&info->lock,flags); + new_line.clock_rate = info->params.clock_speed; + new_line.loopback = info->params.loopback ? 1:0; - return 0; + if (copy_to_user(line, &new_line, size)) + return -EFAULT; + return 0; + + case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ + + if(!capable(CAP_NET_ADMIN)) + return -EPERM; + if (copy_from_user(&new_line, line, size)) + return -EFAULT; + + switch (new_line.clock_type) + { + case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; + case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; + case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; + case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; + case CLOCK_DEFAULT: flags = info->params.flags & + (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | + HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | + HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | + HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; + default: return -EINVAL; + } + + if (new_line.loopback != 0 && new_line.loopback != 1) + return -EINVAL; + + info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | + HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | + HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | + HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); + info->params.flags |= flags; + + info->params.loopback = new_line.loopback; + + if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) + info->params.clock_speed = new_line.clock_rate; + else + info->params.clock_speed = 0; + + /* if network interface up, reprogram hardware */ + if (info->netcount) + mgslpc_program_hw(info); + return 0; + + default: + return hdlc_ioctl(dev, ifr, cmd); + } } -int mgslpc_sppp_close(struct net_device *d) +/** + * called by network layer when transmit timeout is detected + * + * dev pointer to network device structure + */ +static void hdlcdev_tx_timeout(struct net_device *dev) { - MGSLPC_INFO *info = d->priv; + MGSLPC_INFO *info = dev_to_port(dev); + struct net_device_stats *stats = hdlc_stats(dev); unsigned long flags; if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_sppp_close(%s)\n",info->netname); + printk("hdlcdev_tx_timeout(%s)\n",dev->name); - /* shutdown adapter and release resources */ - shutdown(info); + stats->tx_errors++; + stats->tx_aborted_errors++; - /* allow syncppp to do close processing */ - sppp_close(d); - netif_stop_queue(d); + spin_lock_irqsave(&info->lock,flags); + tx_stop(info); + spin_unlock_irqrestore(&info->lock,flags); - spin_lock_irqsave(&info->netlock, flags); - info->netcount=0; - spin_unlock_irqrestore(&info->netlock, flags); - return 0; + netif_wake_queue(dev); +} + +/** + * called by device driver when transmit completes + * reenable network layer transmit if stopped + * + * info pointer to device instance information + */ +static void hdlcdev_tx_done(MGSLPC_INFO *info) +{ + if (netif_queue_stopped(info->netdev)) + netif_wake_queue(info->netdev); } -void mgslpc_sppp_rx_done(MGSLPC_INFO *info, char *buf, int size) +/** + * called by device driver when frame received + * pass frame to network layer + * + * info pointer to device instance information + * buf pointer to buffer contianing frame data + * size count of data bytes in buf + */ +static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) { struct sk_buff *skb = dev_alloc_skb(size); + struct net_device *dev = info->netdev; + struct net_device_stats *stats = hdlc_stats(dev); + if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_sppp_rx_done(%s)\n",info->netname); + printk("hdlcdev_rx(%s)\n",dev->name); + if (skb == NULL) { - printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", - info->netname); - info->netstats.rx_dropped++; + printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); + stats->rx_dropped++; return; } memcpy(skb_put(skb, size),buf,size); - skb->protocol = htons(ETH_P_WAN_PPP); - skb->dev = info->netdev; - skb->mac.raw = skb->data; - info->netstats.rx_packets++; - info->netstats.rx_bytes += size; + skb->dev = info->netdev; + skb->mac.raw = skb->data; + skb->protocol = hdlc_type_trans(skb, skb->dev); + + stats->rx_packets++; + stats->rx_bytes += size; + netif_rx(skb); - info->netdev->trans_start = jiffies; -} -void mgslpc_sppp_tx_done(MGSLPC_INFO *info) -{ - if (netif_queue_stopped(info->netdev)) - netif_wake_queue(info->netdev); + info->netdev->last_rx = jiffies; } -struct net_device_stats *mgslpc_net_stats(struct net_device *dev) +/** + * called by device driver when adding device instance + * do generic HDLC initialization + * + * info pointer to device instance information + * + * returns 0 if success, otherwise error code + */ +static int hdlcdev_init(MGSLPC_INFO *info) { - MGSLPC_INFO *info = dev->priv; - if (debug_level >= DEBUG_LEVEL_INFO) - printk("mgslpc_net_stats(%s)\n",info->netname); - return &info->netstats; + int rc; + struct net_device *dev; + hdlc_device *hdlc; + + /* allocate and initialize network and HDLC layer objects */ + + if (!(dev = alloc_hdlcdev(info))) { + printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); + return -ENOMEM; + } + + /* for network layer reporting purposes only */ + dev->base_addr = info->io_base; + dev->irq = info->irq_level; + + /* network layer callbacks and settings */ + dev->do_ioctl = hdlcdev_ioctl; + dev->open = hdlcdev_open; + dev->stop = hdlcdev_close; + dev->tx_timeout = hdlcdev_tx_timeout; + dev->watchdog_timeo = 10*HZ; + dev->tx_queue_len = 50; + + /* generic HDLC layer callbacks and settings */ + hdlc = dev_to_hdlc(dev); + hdlc->attach = hdlcdev_attach; + hdlc->xmit = hdlcdev_xmit; + + /* register objects with HDLC layer */ + if ((rc = register_hdlc_device(dev))) { + printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); + free_netdev(dev); + return rc; + } + + info->netdev = dev; + return 0; } -int mgslpc_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +/** + * called by device driver when removing device instance + * do generic HDLC cleanup + * + * info pointer to device instance information + */ +static void hdlcdev_exit(MGSLPC_INFO *info) { - MGSLPC_INFO *info = dev->priv; - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__, - info->netname, cmd ); - return sppp_do_ioctl(dev, ifr, cmd); + unregister_hdlc_device(info->netdev); + free_netdev(info->netdev); + info->netdev = NULL; } -#endif /* ifdef CONFIG_SYNCLINK_SYNCPPP */ +#endif /* CONFIG_HDLC */ + _