Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/wan/sdla_chdlc.c b/drivers/net/wan/sdla_chdlc.c
new file mode 100644
index 0000000..afbe002
--- /dev/null
+++ b/drivers/net/wan/sdla_chdlc.c
@@ -0,0 +1,4433 @@
+/*****************************************************************************
+* sdla_chdlc.c WANPIPE(tm) Multiprotocol WAN Link Driver. Cisco HDLC module.
+*
+* Authors: Nenad Corbic <ncorbic@sangoma.com>
+* Gideon Hack
+*
+* Copyright: (c) 1995-2001 Sangoma Technologies Inc.
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version
+* 2 of the License, or (at your option) any later version.
+* ============================================================================
+* Feb 28, 2001 Nenad Corbic Updated if_tx_timeout() routine for
+* 2.4.X kernels.
+* Jan 25, 2001 Nenad Corbic Added a TTY Sync serial driver over the
+* HDLC streaming protocol
+* Added a TTY Async serial driver over the
+* Async protocol.
+* Dec 15, 2000 Nenad Corbic Updated for 2.4.X Kernel support
+* Nov 13, 2000 Nenad Corbic Added true interface type encoding option.
+* Tcpdump doesn't support CHDLC inteface
+* types, to fix this "true type" option will set
+* the interface type to RAW IP mode.
+* Nov 07, 2000 Nenad Corbic Added security features for UDP debugging:
+* Deny all and specify allowed requests.
+* Jun 20, 2000 Nenad Corbic Fixed the API IP ERROR bug. Caused by the
+* latest update.
+* May 09, 2000 Nenad Corbic Option to bring down an interface
+* upon disconnect.
+* Mar 23, 2000 Nenad Corbic Improved task queue, bh handling.
+* Mar 16, 2000 Nenad Corbic Fixed the SLARP Dynamic IP addressing.
+* Mar 06, 2000 Nenad Corbic Bug Fix: corrupted mbox recovery.
+* Feb 10, 2000 Gideon Hack Added ASYNC support.
+* Feb 09, 2000 Nenad Corbic Fixed two shutdown bugs in update() and
+* if_stats() functions.
+* Jan 24, 2000 Nenad Corbic Fixed a startup wanpipe state racing,
+* condition between if_open and isr.
+* Jan 10, 2000 Nenad Corbic Added new socket API support.
+* Dev 15, 1999 Nenad Corbic Fixed up header files for 2.0.X kernels
+* Nov 20, 1999 Nenad Corbic Fixed zero length API bug.
+* Sep 30, 1999 Nenad Corbic Fixed dynamic IP and route setup.
+* Sep 23, 1999 Nenad Corbic Added SMP support, fixed tracing
+* Sep 13, 1999 Nenad Corbic Split up Port 0 and 1 into separate devices.
+* Jun 02, 1999 Gideon Hack Added support for the S514 adapter.
+* Oct 30, 1998 Jaspreet Singh Added Support for CHDLC API (HDLC STREAMING).
+* Oct 28, 1998 Jaspreet Singh Added Support for Dual Port CHDLC.
+* Aug 07, 1998 David Fong Initial version.
+*****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/kernel.h> /* printk(), and other useful stuff */
+#include <linux/stddef.h> /* offsetof(), etc. */
+#include <linux/errno.h> /* return codes */
+#include <linux/string.h> /* inline memset(), etc. */
+#include <linux/slab.h> /* kmalloc(), kfree() */
+#include <linux/wanrouter.h> /* WAN router definitions */
+#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
+#include <linux/if_arp.h> /* ARPHRD_* defines */
+
+
+#include <asm/uaccess.h>
+#include <linux/inetdevice.h>
+#include <linux/netdevice.h>
+
+#include <linux/in.h> /* sockaddr_in */
+#include <linux/inet.h>
+#include <linux/if.h>
+#include <asm/byteorder.h> /* htons(), etc. */
+#include <linux/sdlapci.h>
+#include <asm/io.h>
+
+#include <linux/sdla_chdlc.h> /* CHDLC firmware API definitions */
+#include <linux/sdla_asy.h> /* CHDLC (async) API definitions */
+
+#include <linux/if_wanpipe_common.h> /* Socket Driver common area */
+#include <linux/if_wanpipe.h>
+
+/* TTY Includes */
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+
+
+/****** Defines & Macros ****************************************************/
+
+/* reasons for enabling the timer interrupt on the adapter */
+#define TMR_INT_ENABLED_UDP 0x01
+#define TMR_INT_ENABLED_UPDATE 0x02
+#define TMR_INT_ENABLED_CONFIG 0x10
+
+#define MAX_IP_ERRORS 10
+
+#define TTY_CHDLC_MAX_MTU 2000
+#define CHDLC_DFLT_DATA_LEN 1500 /* default MTU */
+#define CHDLC_HDR_LEN 1
+
+#define CHDLC_API 0x01
+
+#define PORT(x) (x == 0 ? "PRIMARY" : "SECONDARY" )
+#define MAX_BH_BUFF 10
+
+//#define PRINT_DEBUG
+#ifdef PRINT_DEBUG
+#define dbg_printk(format, a...) printk(format, ## a)
+#else
+#define dbg_printk(format, a...)
+#endif
+
+/******Data Structures*****************************************************/
+
+/* This structure is placed in the private data area of the device structure.
+ * The card structure used to occupy the private area but now the following
+ * structure will incorporate the card structure along with CHDLC specific data
+ */
+
+typedef struct chdlc_private_area
+{
+ wanpipe_common_t common;
+ sdla_t *card;
+ int TracingEnabled; /* For enabling Tracing */
+ unsigned long curr_trace_addr; /* Used for Tracing */
+ unsigned long start_trace_addr;
+ unsigned long end_trace_addr;
+ unsigned long base_addr_trace_buffer;
+ unsigned long end_addr_trace_buffer;
+ unsigned short number_trace_elements;
+ unsigned available_buffer_space;
+ unsigned long router_start_time;
+ unsigned char route_status;
+ unsigned char route_removed;
+ unsigned long tick_counter; /* For 5s timeout counter */
+ unsigned long router_up_time;
+ u32 IP_address; /* IP addressing */
+ u32 IP_netmask;
+ u32 ip_local;
+ u32 ip_remote;
+ u32 ip_local_tmp;
+ u32 ip_remote_tmp;
+ u8 ip_error;
+ u8 config_chdlc;
+ u8 config_chdlc_timeout;
+ unsigned char mc; /* Mulitcast support on/off */
+ unsigned short udp_pkt_lgth; /* udp packet processing */
+ char udp_pkt_src;
+ char udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT];
+ unsigned short timer_int_enabled;
+ char update_comms_stats; /* updating comms stats */
+
+ bh_data_t *bh_head; /* Circular buffer for chdlc_bh */
+ unsigned long tq_working;
+ volatile int bh_write;
+ volatile int bh_read;
+ atomic_t bh_buff_used;
+
+ unsigned char interface_down;
+
+ /* Polling work queue entry. Each interface
+ * has its own work queue entry, which is used
+ * to defer events from the interrupt */
+ struct work_struct poll_work;
+ struct timer_list poll_delay_timer;
+
+ u8 gateway;
+ u8 true_if_encoding;
+ //FIXME: add driver stats as per frame relay!
+
+} chdlc_private_area_t;
+
+/* Route Status options */
+#define NO_ROUTE 0x00
+#define ADD_ROUTE 0x01
+#define ROUTE_ADDED 0x02
+#define REMOVE_ROUTE 0x03
+
+
+/* variable for keeping track of enabling/disabling FT1 monitor status */
+static int rCount = 0;
+
+/* variable for tracking how many interfaces to open for WANPIPE on the
+ two ports */
+
+extern void disable_irq(unsigned int);
+extern void enable_irq(unsigned int);
+
+/****** Function Prototypes *************************************************/
+/* WAN link driver entry points. These are called by the WAN router module. */
+static int update(struct wan_device* wandev);
+static int new_if(struct wan_device* wandev, struct net_device* dev,
+ wanif_conf_t* conf);
+
+/* Network device interface */
+static int if_init(struct net_device* dev);
+static int if_open(struct net_device* dev);
+static int if_close(struct net_device* dev);
+static int if_header(struct sk_buff* skb, struct net_device* dev,
+ unsigned short type, void* daddr, void* saddr,
+ unsigned len);
+
+static int if_rebuild_hdr (struct sk_buff *skb);
+static struct net_device_stats* if_stats(struct net_device* dev);
+
+static int if_send(struct sk_buff* skb, struct net_device* dev);
+
+/* CHDLC Firmware interface functions */
+static int chdlc_configure (sdla_t* card, void* data);
+static int chdlc_comm_enable (sdla_t* card);
+static int chdlc_read_version (sdla_t* card, char* str);
+static int chdlc_set_intr_mode (sdla_t* card, unsigned mode);
+static int chdlc_send (sdla_t* card, void* data, unsigned len);
+static int chdlc_read_comm_err_stats (sdla_t* card);
+static int chdlc_read_op_stats (sdla_t* card);
+static int chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *mb);
+
+
+static int chdlc_disable_comm_shutdown (sdla_t *card);
+static void if_tx_timeout(struct net_device *dev);
+
+/* Miscellaneous CHDLC Functions */
+static int set_chdlc_config (sdla_t* card);
+static void init_chdlc_tx_rx_buff( sdla_t* card);
+static int process_chdlc_exception(sdla_t *card);
+static int process_global_exception(sdla_t *card);
+static int update_comms_stats(sdla_t* card,
+ chdlc_private_area_t* chdlc_priv_area);
+static int configure_ip (sdla_t* card);
+static int unconfigure_ip (sdla_t* card);
+static void process_route(sdla_t *card);
+static void port_set_state (sdla_t *card, int);
+static int config_chdlc (sdla_t *card);
+static void disable_comm (sdla_t *card);
+
+static void trigger_chdlc_poll(struct net_device *dev);
+static void chdlc_poll(struct net_device *dev);
+static void chdlc_poll_delay (unsigned long dev_ptr);
+
+
+/* Miscellaneous asynchronous interface Functions */
+static int set_asy_config (sdla_t* card);
+static int asy_comm_enable (sdla_t* card);
+
+/* Interrupt handlers */
+static void wpc_isr (sdla_t* card);
+static void rx_intr (sdla_t* card);
+static void timer_intr(sdla_t *);
+
+/* Bottom half handlers */
+static void chdlc_work(struct net_device *dev);
+static int chdlc_work_cleanup(struct net_device *dev);
+static int bh_enqueue(struct net_device *dev, struct sk_buff *skb);
+
+/* Miscellaneous functions */
+static int chk_bcast_mcast_addr(sdla_t* card, struct net_device* dev,
+ struct sk_buff *skb);
+static int reply_udp( unsigned char *data, unsigned int mbox_len );
+static int intr_test( sdla_t* card);
+static int udp_pkt_type( struct sk_buff *skb , sdla_t* card);
+static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
+ struct sk_buff *skb, struct net_device* dev,
+ chdlc_private_area_t* chdlc_priv_area);
+static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
+ chdlc_private_area_t* chdlc_priv_area);
+static unsigned short calc_checksum (char *, int);
+static void s508_lock (sdla_t *card, unsigned long *smp_flags);
+static void s508_unlock (sdla_t *card, unsigned long *smp_flags);
+
+
+static int Intr_test_counter;
+
+/* TTY Global Definitions */
+
+#define NR_PORTS 4
+#define WAN_TTY_MAJOR 226
+#define WAN_TTY_MINOR 0
+
+#define WAN_CARD(port) (tty_card_map[port])
+#define MIN_PORT 0
+#define MAX_PORT NR_PORTS-1
+
+#define CRC_LENGTH 2
+
+static int wanpipe_tty_init(sdla_t *card);
+static void wanpipe_tty_receive(sdla_t *, unsigned, unsigned int);
+static void wanpipe_tty_trigger_poll(sdla_t *card);
+
+static struct tty_driver serial_driver;
+static int tty_init_cnt=0;
+
+static struct serial_state rs_table[NR_PORTS];
+
+static char tty_driver_mode=WANOPT_TTY_SYNC;
+
+static char *opt_decode[] = {"NONE","CRTSCTS","XONXOFF-RX",
+ "CRTSCTS XONXOFF-RX","XONXOFF-TX",
+ "CRTSCTS XONXOFF-TX","CRTSCTS XONXOFF"};
+static char *p_decode[] = {"NONE","ODD","EVEN"};
+
+static void* tty_card_map[NR_PORTS] = {NULL,NULL,NULL,NULL};
+
+
+/****** Public Functions ****************************************************/
+
+/*============================================================================
+ * Cisco HDLC protocol initialization routine.
+ *
+ * This routine is called by the main WANPIPE module during setup. At this
+ * point adapter is completely initialized and firmware is running.
+ * o read firmware version (to make sure it's alive)
+ * o configure adapter
+ * o initialize protocol-specific fields of the adapter data space.
+ *
+ * Return: 0 o.k.
+ * < 0 failure.
+ */
+int wpc_init (sdla_t* card, wandev_conf_t* conf)
+{
+ unsigned char port_num;
+ int err;
+ unsigned long max_permitted_baud = 0;
+ SHARED_MEMORY_INFO_STRUCT *flags;
+
+ union
+ {
+ char str[80];
+ } u;
+ volatile CHDLC_MAILBOX_STRUCT* mb;
+ CHDLC_MAILBOX_STRUCT* mb1;
+ unsigned long timeout;
+
+ /* Verify configuration ID */
+ if (conf->config_id != WANCONFIG_CHDLC) {
+ printk(KERN_INFO "%s: invalid configuration ID %u!\n",
+ card->devname, conf->config_id);
+ return -EINVAL;
+ }
+
+ /* Find out which Port to use */
+ if ((conf->comm_port == WANOPT_PRI) || (conf->comm_port == WANOPT_SEC)){
+ if (card->next){
+
+ if (conf->comm_port != card->next->u.c.comm_port){
+ card->u.c.comm_port = conf->comm_port;
+ }else{
+ printk(KERN_INFO "%s: ERROR - %s port used!\n",
+ card->wandev.name, PORT(conf->comm_port));
+ return -EINVAL;
+ }
+ }else{
+ card->u.c.comm_port = conf->comm_port;
+ }
+ }else{
+ printk(KERN_INFO "%s: ERROR - Invalid Port Selected!\n",
+ card->wandev.name);
+ return -EINVAL;
+ }
+
+
+ /* Initialize protocol-specific fields */
+ if(card->hw.type != SDLA_S514){
+
+ if (card->u.c.comm_port == WANOPT_PRI){
+ card->mbox = (void *) card->hw.dpmbase;
+ }else{
+ card->mbox = (void *) card->hw.dpmbase +
+ SEC_BASE_ADDR_MB_STRUCT - PRI_BASE_ADDR_MB_STRUCT;
+ }
+ }else{
+ /* for a S514 adapter, set a pointer to the actual mailbox in the */
+ /* allocated virtual memory area */
+ if (card->u.c.comm_port == WANOPT_PRI){
+ card->mbox = (void *) card->hw.dpmbase + PRI_BASE_ADDR_MB_STRUCT;
+ }else{
+ card->mbox = (void *) card->hw.dpmbase + SEC_BASE_ADDR_MB_STRUCT;
+ }
+ }
+
+ mb = mb1 = card->mbox;
+
+ if (!card->configured){
+
+ /* The board will place an 'I' in the return code to indicate that it is
+ ready to accept commands. We expect this to be completed in less
+ than 1 second. */
+
+ timeout = jiffies;
+ while (mb->return_code != 'I') /* Wait 1s for board to initialize */
+ if ((jiffies - timeout) > 1*HZ) break;
+
+ if (mb->return_code != 'I') {
+ printk(KERN_INFO
+ "%s: Initialization not completed by adapter\n",
+ card->devname);
+ printk(KERN_INFO "Please contact Sangoma representative.\n");
+ return -EIO;
+ }
+ }
+
+ /* Read firmware version. Note that when adapter initializes, it
+ * clears the mailbox, so it may appear that the first command was
+ * executed successfully when in fact it was merely erased. To work
+ * around this, we execute the first command twice.
+ */
+
+ if (chdlc_read_version(card, u.str))
+ return -EIO;
+
+ printk(KERN_INFO "%s: Running Cisco HDLC firmware v%s\n",
+ card->devname, u.str);
+
+ card->isr = &wpc_isr;
+ card->poll = NULL;
+ card->exec = NULL;
+ card->wandev.update = &update;
+ card->wandev.new_if = &new_if;
+ card->wandev.del_if = NULL;
+ card->wandev.udp_port = conf->udp_port;
+ card->disable_comm = &disable_comm;
+ card->wandev.new_if_cnt = 0;
+
+ /* reset the number of times the 'update()' proc has been called */
+ card->u.c.update_call_count = 0;
+
+ card->wandev.ttl = conf->ttl;
+ card->wandev.interface = conf->interface;
+
+ if ((card->u.c.comm_port == WANOPT_SEC && conf->interface == WANOPT_V35)&&
+ card->hw.type != SDLA_S514){
+ printk(KERN_INFO "%s: ERROR - V35 Interface not supported on S508 %s port \n",
+ card->devname, PORT(card->u.c.comm_port));
+ return -EIO;
+ }
+
+ card->wandev.clocking = conf->clocking;
+
+ port_num = card->u.c.comm_port;
+
+ /* in API mode, we can configure for "receive only" buffering */
+ if(card->hw.type == SDLA_S514) {
+ card->u.c.receive_only = conf->receive_only;
+ if(conf->receive_only) {
+ printk(KERN_INFO
+ "%s: Configured for 'receive only' mode\n",
+ card->devname);
+ }
+ }
+
+ /* Setup Port Bps */
+
+ if(card->wandev.clocking) {
+ if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
+ /* For Primary Port 0 */
+ max_permitted_baud =
+ (card->hw.type == SDLA_S514) ?
+ PRI_MAX_BAUD_RATE_S514 :
+ PRI_MAX_BAUD_RATE_S508;
+
+ }else if(port_num == WANOPT_SEC) {
+ /* For Secondary Port 1 */
+ max_permitted_baud =
+ (card->hw.type == SDLA_S514) ?
+ SEC_MAX_BAUD_RATE_S514 :
+ SEC_MAX_BAUD_RATE_S508;
+ }
+
+ if(conf->bps > max_permitted_baud) {
+ conf->bps = max_permitted_baud;
+ printk(KERN_INFO "%s: Baud too high!\n",
+ card->wandev.name);
+ printk(KERN_INFO "%s: Baud rate set to %lu bps\n",
+ card->wandev.name, max_permitted_baud);
+ }
+ card->wandev.bps = conf->bps;
+ }else{
+ card->wandev.bps = 0;
+ }
+
+ /* Setup the Port MTU */
+ if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
+
+ /* For Primary Port 0 */
+ card->wandev.mtu =
+ (conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
+ min_t(unsigned int, conf->mtu, PRI_MAX_NO_DATA_BYTES_IN_FRAME) :
+ CHDLC_DFLT_DATA_LEN;
+ } else if(port_num == WANOPT_SEC) {
+ /* For Secondary Port 1 */
+ card->wandev.mtu =
+ (conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
+ min_t(unsigned int, conf->mtu, SEC_MAX_NO_DATA_BYTES_IN_FRAME) :
+ CHDLC_DFLT_DATA_LEN;
+ }
+
+ /* Set up the interrupt status area */
+ /* Read the CHDLC Configuration and obtain:
+ * Ptr to shared memory infor struct
+ * Use this pointer to calculate the value of card->u.c.flags !
+ */
+ mb1->buffer_length = 0;
+ mb1->command = READ_CHDLC_CONFIGURATION;
+ err = sdla_exec(mb1) ? mb1->return_code : CMD_TIMEOUT;
+ if(err != COMMAND_OK) {
+ if(card->hw.type != SDLA_S514)
+ enable_irq(card->hw.irq);
+
+ chdlc_error(card, err, mb1);
+ return -EIO;
+ }
+
+ if(card->hw.type == SDLA_S514){
+ card->u.c.flags = (void *)(card->hw.dpmbase +
+ (((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
+ ptr_shared_mem_info_struct));
+ }else{
+ card->u.c.flags = (void *)(card->hw.dpmbase +
+ (((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
+ ptr_shared_mem_info_struct % SDLA_WINDOWSIZE));
+ }
+
+ flags = card->u.c.flags;
+
+ /* This is for the ports link state */
+ card->wandev.state = WAN_DUALPORT;
+ card->u.c.state = WAN_DISCONNECTED;
+
+
+ if (!card->wandev.piggyback){
+ int err;
+
+ /* Perform interrupt testing */
+ err = intr_test(card);
+
+ if(err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
+ printk(KERN_INFO "%s: Interrupt test failed (%i)\n",
+ card->devname, Intr_test_counter);
+ printk(KERN_INFO "%s: Please choose another interrupt\n",
+ card->devname);
+ return -EIO;
+ }
+
+ printk(KERN_INFO "%s: Interrupt test passed (%i)\n",
+ card->devname, Intr_test_counter);
+ card->configured = 1;
+ }
+
+ if ((card->tty_opt=conf->tty) == WANOPT_YES){
+ int err;
+ card->tty_minor = conf->tty_minor;
+
+ /* On ASYNC connections internal clocking
+ * is mandatory */
+ if ((card->u.c.async_mode = conf->tty_mode)){
+ card->wandev.clocking = 1;
+ }
+ err=wanpipe_tty_init(card);
+ if (err){
+ return err;
+ }
+ }else{
+
+
+ if (chdlc_set_intr_mode(card, APP_INT_ON_TIMER)){
+ printk (KERN_INFO "%s: "
+ "Failed to set interrupt triggers!\n",
+ card->devname);
+ return -EIO;
+ }
+
+ /* Mask the Timer interrupt */
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~APP_INT_ON_TIMER;
+ }
+
+ /* If we are using CHDLC in backup mode, this flag will
+ * indicate not to look for IP addresses in config_chdlc()*/
+ card->u.c.backup = conf->backup;
+
+ printk(KERN_INFO "\n");
+
+ return 0;
+}
+
+/******* WAN Device Driver Entry Points *************************************/
+
+/*============================================================================
+ * Update device status & statistics
+ * This procedure is called when updating the PROC file system and returns
+ * various communications statistics. These statistics are accumulated from 3
+ * different locations:
+ * 1) The 'if_stats' recorded for the device.
+ * 2) Communication error statistics on the adapter.
+ * 3) CHDLC operational statistics on the adapter.
+ * The board level statistics are read during a timer interrupt. Note that we
+ * read the error and operational statistics during consecitive timer ticks so
+ * as to minimize the time that we are inside the interrupt handler.
+ *
+ */
+static int update(struct wan_device* wandev)
+{
+ sdla_t* card = wandev->private;
+ struct net_device* dev;
+ volatile chdlc_private_area_t* chdlc_priv_area;
+ SHARED_MEMORY_INFO_STRUCT *flags;
+ unsigned long timeout;
+
+ /* sanity checks */
+ if((wandev == NULL) || (wandev->private == NULL))
+ return -EFAULT;
+
+ if(wandev->state == WAN_UNCONFIGURED)
+ return -ENODEV;
+
+ /* more sanity checks */
+ if(!card->u.c.flags)
+ return -ENODEV;
+
+ if(test_bit(PERI_CRIT, (void*)&card->wandev.critical))
+ return -EAGAIN;
+
+ if((dev=card->wandev.dev) == NULL)
+ return -ENODEV;
+
+ if((chdlc_priv_area=dev->priv) == NULL)
+ return -ENODEV;
+
+ flags = card->u.c.flags;
+ if(chdlc_priv_area->update_comms_stats){
+ return -EAGAIN;
+ }
+
+ /* we will need 2 timer interrupts to complete the */
+ /* reading of the statistics */
+ chdlc_priv_area->update_comms_stats = 2;
+ flags->interrupt_info_struct.interrupt_permission |= APP_INT_ON_TIMER;
+ chdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UPDATE;
+
+ /* wait a maximum of 1 second for the statistics to be updated */
+ timeout = jiffies;
+ for(;;) {
+ if(chdlc_priv_area->update_comms_stats == 0)
+ break;
+ if ((jiffies - timeout) > (1 * HZ)){
+ chdlc_priv_area->update_comms_stats = 0;
+ chdlc_priv_area->timer_int_enabled &=
+ ~TMR_INT_ENABLED_UPDATE;
+ return -EAGAIN;
+ }
+ }
+
+ return 0;
+}
+
+
+/*============================================================================
+ * Create new logical channel.
+ * This routine is called by the router when ROUTER_IFNEW IOCTL is being
+ * handled.
+ * o parse media- and hardware-specific configuration
+ * o make sure that a new channel can be created
+ * o allocate resources, if necessary
+ * o prepare network device structure for registaration.
+ *
+ * Return: 0 o.k.
+ * < 0 failure (channel will not be created)
+ */
+static int new_if(struct wan_device* wandev, struct net_device* dev,
+ wanif_conf_t* conf)
+{
+ sdla_t* card = wandev->private;
+ chdlc_private_area_t* chdlc_priv_area;
+
+
+ printk(KERN_INFO "%s: Configuring Interface: %s\n",
+ card->devname, conf->name);
+
+ if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
+ printk(KERN_INFO "%s: Invalid interface name!\n",
+ card->devname);
+ return -EINVAL;
+ }
+
+ /* allocate and initialize private data */
+ chdlc_priv_area = kmalloc(sizeof(chdlc_private_area_t), GFP_KERNEL);
+
+ if(chdlc_priv_area == NULL)
+ return -ENOMEM;
+
+ memset(chdlc_priv_area, 0, sizeof(chdlc_private_area_t));
+
+ chdlc_priv_area->card = card;
+ chdlc_priv_area->common.sk = NULL;
+ chdlc_priv_area->common.func = NULL;
+
+ /* initialize data */
+ strcpy(card->u.c.if_name, conf->name);
+
+ if(card->wandev.new_if_cnt > 0) {
+ kfree(chdlc_priv_area);
+ return -EEXIST;
+ }
+
+ card->wandev.new_if_cnt++;
+
+ chdlc_priv_area->TracingEnabled = 0;
+ chdlc_priv_area->route_status = NO_ROUTE;
+ chdlc_priv_area->route_removed = 0;
+
+ card->u.c.async_mode = conf->async_mode;
+
+ /* setup for asynchronous mode */
+ if(conf->async_mode) {
+ printk(KERN_INFO "%s: Configuring for asynchronous mode\n",
+ wandev->name);
+
+ if(card->u.c.comm_port == WANOPT_PRI) {
+ printk(KERN_INFO
+ "%s:Asynchronous mode on secondary port only\n",
+ wandev->name);
+ kfree(chdlc_priv_area);
+ return -EINVAL;
+ }
+
+ if(strcmp(conf->usedby, "WANPIPE") == 0) {
+ printk(KERN_INFO
+ "%s: Running in WANIPE Async Mode\n", wandev->name);
+ card->u.c.usedby = WANPIPE;
+ }else{
+ card->u.c.usedby = API;
+ }
+
+ if(!card->wandev.clocking) {
+ printk(KERN_INFO
+ "%s: Asynch. clocking must be 'Internal'\n",
+ wandev->name);
+ kfree(chdlc_priv_area);
+ return -EINVAL;
+ }
+
+ if((card->wandev.bps < MIN_ASY_BAUD_RATE) ||
+ (card->wandev.bps > MAX_ASY_BAUD_RATE)) {
+ printk(KERN_INFO "%s: Selected baud rate is invalid.\n",
+ wandev->name);
+ printk(KERN_INFO "Must be between %u and %u bps.\n",
+ MIN_ASY_BAUD_RATE, MAX_ASY_BAUD_RATE);
+ kfree(chdlc_priv_area);
+ return -EINVAL;
+ }
+
+ card->u.c.api_options = 0;
+ if (conf->asy_data_trans == WANOPT_YES) {
+ card->u.c.api_options |= ASY_RX_DATA_TRANSPARENT;
+ }
+
+ card->u.c.protocol_options = 0;
+ if (conf->rts_hs_for_receive == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_RTS_HS_FOR_RX;
+ }
+ if (conf->xon_xoff_hs_for_receive == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_RX;
+ }
+ if (conf->xon_xoff_hs_for_transmit == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_TX;
+ }
+ if (conf->dcd_hs_for_transmit == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_DCD_HS_FOR_TX;
+ }
+ if (conf->cts_hs_for_transmit == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_CTS_HS_FOR_TX;
+ }
+
+ card->u.c.tx_bits_per_char = conf->tx_bits_per_char;
+ card->u.c.rx_bits_per_char = conf->rx_bits_per_char;
+ card->u.c.stop_bits = conf->stop_bits;
+ card->u.c.parity = conf->parity;
+ card->u.c.break_timer = conf->break_timer;
+ card->u.c.inter_char_timer = conf->inter_char_timer;
+ card->u.c.rx_complete_length = conf->rx_complete_length;
+ card->u.c.xon_char = conf->xon_char;
+
+ } else { /* setup for synchronous mode */
+
+ card->u.c.protocol_options = 0;
+ if (conf->ignore_dcd == WANOPT_YES){
+ card->u.c.protocol_options |= IGNORE_DCD_FOR_LINK_STAT;
+ }
+ if (conf->ignore_cts == WANOPT_YES){
+ card->u.c.protocol_options |= IGNORE_CTS_FOR_LINK_STAT;
+ }
+
+ if (conf->ignore_keepalive == WANOPT_YES) {
+ card->u.c.protocol_options |=
+ IGNORE_KPALV_FOR_LINK_STAT;
+ card->u.c.kpalv_tx = MIN_Tx_KPALV_TIMER;
+ card->u.c.kpalv_rx = MIN_Rx_KPALV_TIMER;
+ card->u.c.kpalv_err = MIN_KPALV_ERR_TOL;
+
+ } else { /* Do not ignore keepalives */
+ card->u.c.kpalv_tx =
+ ((conf->keepalive_tx_tmr - MIN_Tx_KPALV_TIMER)
+ >= 0) ?
+ min_t(unsigned int, conf->keepalive_tx_tmr,MAX_Tx_KPALV_TIMER) :
+ DEFAULT_Tx_KPALV_TIMER;
+
+ card->u.c.kpalv_rx =
+ ((conf->keepalive_rx_tmr - MIN_Rx_KPALV_TIMER)
+ >= 0) ?
+ min_t(unsigned int, conf->keepalive_rx_tmr,MAX_Rx_KPALV_TIMER) :
+ DEFAULT_Rx_KPALV_TIMER;
+
+ card->u.c.kpalv_err =
+ ((conf->keepalive_err_margin-MIN_KPALV_ERR_TOL)
+ >= 0) ?
+ min_t(unsigned int, conf->keepalive_err_margin,
+ MAX_KPALV_ERR_TOL) :
+ DEFAULT_KPALV_ERR_TOL;
+ }
+
+ /* Setup slarp timer to control delay between slarps */
+ card->u.c.slarp_timer =
+ ((conf->slarp_timer - MIN_SLARP_REQ_TIMER) >= 0) ?
+ min_t(unsigned int, conf->slarp_timer, MAX_SLARP_REQ_TIMER) :
+ DEFAULT_SLARP_REQ_TIMER;
+
+ if (conf->hdlc_streaming == WANOPT_YES) {
+ printk(KERN_INFO "%s: Enabling HDLC STREAMING Mode\n",
+ wandev->name);
+ card->u.c.protocol_options = HDLC_STREAMING_MODE;
+ }
+
+ if ((chdlc_priv_area->true_if_encoding = conf->true_if_encoding) == WANOPT_YES){
+ printk(KERN_INFO
+ "%s: Enabling, true interface type encoding.\n",
+ card->devname);
+ }
+
+ /* Setup wanpipe as a router (WANPIPE) or as an API */
+ if( strcmp(conf->usedby, "WANPIPE") == 0) {
+
+ printk(KERN_INFO "%s: Running in WANPIPE mode!\n",
+ wandev->name);
+ card->u.c.usedby = WANPIPE;
+
+ /* Option to bring down the interface when
+ * the link goes down */
+ if (conf->if_down){
+ set_bit(DYN_OPT_ON,&chdlc_priv_area->interface_down);
+ printk(KERN_INFO
+ "%s: Dynamic interface configuration enabled\n",
+ card->devname);
+ }
+
+ } else if( strcmp(conf->usedby, "API") == 0) {
+ card->u.c.usedby = API;
+ printk(KERN_INFO "%s: Running in API mode !\n",
+ wandev->name);
+ }
+ }
+
+ /* Tells us that if this interface is a
+ * gateway or not */
+ if ((chdlc_priv_area->gateway = conf->gateway) == WANOPT_YES){
+ printk(KERN_INFO "%s: Interface %s is set as a gateway.\n",
+ card->devname,card->u.c.if_name);
+ }
+
+ /* Get Multicast Information */
+ chdlc_priv_area->mc = conf->mc;
+
+ /* prepare network device data space for registration */
+ strcpy(dev->name,card->u.c.if_name);
+
+ dev->init = &if_init;
+ dev->priv = chdlc_priv_area;
+
+ /* Initialize the polling work routine */
+ INIT_WORK(&chdlc_priv_area->poll_work, (void*)(void*)chdlc_poll, dev);
+
+ /* Initialize the polling delay timer */
+ init_timer(&chdlc_priv_area->poll_delay_timer);
+ chdlc_priv_area->poll_delay_timer.data = (unsigned long)dev;
+ chdlc_priv_area->poll_delay_timer.function = chdlc_poll_delay;
+
+ printk(KERN_INFO "\n");
+
+ return 0;
+}
+
+
+/****** Network Device Interface ********************************************/
+
+/*============================================================================
+ * Initialize Linux network interface.
+ *
+ * This routine is called only once for each interface, during Linux network
+ * interface registration. Returning anything but zero will fail interface
+ * registration.
+ */
+static int if_init(struct net_device* dev)
+{
+ chdlc_private_area_t* chdlc_priv_area = dev->priv;
+ sdla_t* card = chdlc_priv_area->card;
+ struct wan_device* wandev = &card->wandev;
+
+ /* Initialize device driver entry points */
+ dev->open = &if_open;
+ dev->stop = &if_close;
+ dev->hard_header = &if_header;
+ dev->rebuild_header = &if_rebuild_hdr;
+ dev->hard_start_xmit = &if_send;
+ dev->get_stats = &if_stats;
+ dev->tx_timeout = &if_tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+
+ /* Initialize media-specific parameters */
+ dev->flags |= IFF_POINTOPOINT;
+ dev->flags |= IFF_NOARP;
+
+ /* Enable Mulitcasting if user selected */
+ if (chdlc_priv_area->mc == WANOPT_YES){
+ dev->flags |= IFF_MULTICAST;
+ }
+
+ if (chdlc_priv_area->true_if_encoding){
+ dev->type = ARPHRD_HDLC; /* This breaks the tcpdump */
+ }else{
+ dev->type = ARPHRD_PPP;
+ }
+
+ dev->mtu = card->wandev.mtu;
+ /* for API usage, add the API header size to the requested MTU size */
+ if(card->u.c.usedby == API) {
+ dev->mtu += sizeof(api_tx_hdr_t);
+ }
+
+ dev->hard_header_len = CHDLC_HDR_LEN;
+
+ /* Initialize hardware parameters */
+ dev->irq = wandev->irq;
+ dev->dma = wandev->dma;
+ dev->base_addr = wandev->ioport;
+ dev->mem_start = wandev->maddr;
+ dev->mem_end = wandev->maddr + wandev->msize - 1;
+
+ /* Set transmit buffer queue length
+ * If too low packets will not be retransmitted
+ * by stack.
+ */
+ dev->tx_queue_len = 100;
+ SET_MODULE_OWNER(dev);
+
+ return 0;
+}
+
+/*============================================================================
+ * Open network interface.
+ * o enable communications and interrupts.
+ * o prevent module from unloading by incrementing use count
+ *
+ * Return 0 if O.k. or errno.
+ */
+static int if_open(struct net_device* dev)
+{
+ chdlc_private_area_t* chdlc_priv_area = dev->priv;
+ sdla_t* card = chdlc_priv_area->card;
+ struct timeval tv;
+ int err = 0;
+
+ /* Only one open per interface is allowed */
+
+ if (netif_running(dev))
+ return -EBUSY;
+
+ /* Initialize the work queue entry */
+ chdlc_priv_area->tq_working=0;
+
+ INIT_WORK(&chdlc_priv_area->common.wanpipe_work,
+ (void *)(void *)chdlc_work, dev);
+
+ /* Allocate and initialize BH circular buffer */
+ /* Add 1 to MAX_BH_BUFF so we don't have test with (MAX_BH_BUFF-1) */
+ chdlc_priv_area->bh_head = kmalloc((sizeof(bh_data_t)*(MAX_BH_BUFF+1)),GFP_ATOMIC);
+ memset(chdlc_priv_area->bh_head,0,(sizeof(bh_data_t)*(MAX_BH_BUFF+1)));
+ atomic_set(&chdlc_priv_area->bh_buff_used, 0);
+
+ do_gettimeofday(&tv);
+ chdlc_priv_area->router_start_time = tv.tv_sec;
+
+ netif_start_queue(dev);
+
+ wanpipe_open(card);
+
+ /* TTY is configured during wanpipe_set_termios
+ * call, not here */
+ if (card->tty_opt)
+ return err;
+
+ set_bit(0,&chdlc_priv_area->config_chdlc);
+ chdlc_priv_area->config_chdlc_timeout=jiffies;
+
+ /* Start the CHDLC configuration after 1sec delay.
+ * This will give the interface initilization time
+ * to finish its configuration */
+ mod_timer(&chdlc_priv_area->poll_delay_timer, jiffies + HZ);
+ return err;
+}
+
+/*============================================================================
+ * Close network interface.
+ * o if this is the last close, then disable communications and interrupts.
+ * o reset flags.
+ */
+static int if_close(struct net_device* dev)
+{
+ chdlc_private_area_t* chdlc_priv_area = dev->priv;
+ sdla_t* card = chdlc_priv_area->card;
+
+ if (chdlc_priv_area->bh_head){
+ int i;
+ struct sk_buff *skb;
+
+ for (i=0; i<(MAX_BH_BUFF+1); i++){
+ skb = ((bh_data_t *)&chdlc_priv_area->bh_head[i])->skb;
+ if (skb != NULL){
+ dev_kfree_skb_any(skb);
+ }
+ }
+ kfree(chdlc_priv_area->bh_head);
+ chdlc_priv_area->bh_head=NULL;
+ }
+
+ netif_stop_queue(dev);
+ wanpipe_close(card);
+ del_timer(&chdlc_priv_area->poll_delay_timer);
+ return 0;
+}
+
+static void disable_comm (sdla_t *card)
+{
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+
+ if (card->u.c.comm_enabled){
+ chdlc_disable_comm_shutdown (card);
+ }else{
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ }
+
+ if (!tty_init_cnt)
+ return;
+
+ if (card->tty_opt){
+ struct serial_state * state;
+ if (!(--tty_init_cnt)){
+ int e1;
+ serial_driver.refcount=0;
+
+ if ((e1 = tty_unregister_driver(&serial_driver)))
+ printk("SERIAL: failed to unregister serial driver (%d)\n",
+ e1);
+ printk(KERN_INFO "%s: Unregistering TTY Driver, Major %i\n",
+ card->devname,WAN_TTY_MAJOR);
+ }
+ card->tty=NULL;
+ tty_card_map[card->tty_minor]=NULL;
+ state = &rs_table[card->tty_minor];
+ memset(state, 0, sizeof(*state));
+ }
+ return;
+}
+
+
+/*============================================================================
+ * Build media header.
+ *
+ * The trick here is to put packet type (Ethertype) into 'protocol' field of
+ * the socket buffer, so that we don't forget it. If packet type is not
+ * supported, set skb->protocol to 0 and discard packet later.
+ *
+ * Return: media header length.
+ */
+static int if_header(struct sk_buff* skb, struct net_device* dev,
+ unsigned short type, void* daddr, void* saddr,
+ unsigned len)
+{
+ skb->protocol = htons(type);
+
+ return CHDLC_HDR_LEN;
+}
+
+
+/*============================================================================
+ * Handle transmit timeout event from netif watchdog
+ */
+static void if_tx_timeout(struct net_device *dev)
+{
+ chdlc_private_area_t* chan = dev->priv;
+ sdla_t *card = chan->card;
+
+ /* If our device stays busy for at least 5 seconds then we will
+ * kick start the device by making dev->tbusy = 0. We expect
+ * that our device never stays busy more than 5 seconds. So this
+ * is only used as a last resort.
+ */
+
+ ++card->wandev.stats.collisions;
+
+ printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
+ netif_wake_queue (dev);
+}
+
+
+
+/*============================================================================
+ * Re-build media header.
+ *
+ * Return: 1 physical address resolved.
+ * 0 physical address not resolved
+ */
+static int if_rebuild_hdr (struct sk_buff *skb)
+{
+ return 1;
+}
+
+
+/*============================================================================
+ * Send a packet on a network interface.
+ * o set tbusy flag (marks start of the transmission) to block a timer-based
+ * transmit from overlapping.
+ * o check link state. If link is not up, then drop the packet.
+ * o execute adapter send command.
+ * o free socket buffer
+ *
+ * Return: 0 complete (socket buffer must be freed)
+ * non-0 packet may be re-transmitted (tbusy must be set)
+ *
+ * Notes:
+ * 1. This routine is called either by the protocol stack or by the "net
+ * bottom half" (with interrupts enabled).
+ * 2. Setting tbusy flag will inhibit further transmit requests from the
+ * protocol stack and can be used for flow control with protocol layer.
+ */
+static int if_send(struct sk_buff* skb, struct net_device* dev)
+{
+ chdlc_private_area_t *chdlc_priv_area = dev->priv;
+ sdla_t *card = chdlc_priv_area->card;
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+ INTERRUPT_INFORMATION_STRUCT *chdlc_int = &flags->interrupt_info_struct;
+ int udp_type = 0;
+ unsigned long smp_flags;
+ int err=0;
+
+ netif_stop_queue(dev);
+
+ if (skb == NULL){
+ /* If we get here, some higher layer thinks we've missed an
+ * tx-done interrupt.
+ */
+ printk(KERN_INFO "%s: interface %s got kicked!\n",
+ card->devname, dev->name);
+
+ netif_wake_queue(dev);
+ return 0;
+ }
+
+ if (ntohs(skb->protocol) != htons(PVC_PROT)){
+
+ /* check the udp packet type */
+
+ udp_type = udp_pkt_type(skb, card);
+
+ if (udp_type == UDP_CPIPE_TYPE){
+ if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
+ chdlc_priv_area)){
+ chdlc_int->interrupt_permission |=
+ APP_INT_ON_TIMER;
+ }
+ netif_start_queue(dev);
+ return 0;
+ }
+
+ /* check to see if the source IP address is a broadcast or */
+ /* multicast IP address */
+ if(chk_bcast_mcast_addr(card, dev, skb)){
+ ++card->wandev.stats.tx_dropped;
+ dev_kfree_skb_any(skb);
+ netif_start_queue(dev);
+ return 0;
+ }
+ }
+
+ /* Lock the 508 Card: SMP is supported */
+ if(card->hw.type != SDLA_S514){
+ s508_lock(card,&smp_flags);
+ }
+
+ if(test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
+
+ printk(KERN_INFO "%s: Critical in if_send: %lx\n",
+ card->wandev.name,card->wandev.critical);
+ ++card->wandev.stats.tx_dropped;
+ netif_start_queue(dev);
+ goto if_send_exit_crit;
+ }
+
+ if(card->u.c.state != WAN_CONNECTED){
+ ++card->wandev.stats.tx_dropped;
+ netif_start_queue(dev);
+
+ }else if(!skb->protocol){
+ ++card->wandev.stats.tx_errors;
+ netif_start_queue(dev);
+
+ }else {
+ void* data = skb->data;
+ unsigned len = skb->len;
+ unsigned char attr;
+
+ /* If it's an API packet pull off the API
+ * header. Also check that the packet size
+ * is larger than the API header
+ */
+ if (card->u.c.usedby == API){
+ api_tx_hdr_t* api_tx_hdr;
+
+ /* discard the frame if we are configured for */
+ /* 'receive only' mode or if there is no data */
+ if (card->u.c.receive_only ||
+ (len <= sizeof(api_tx_hdr_t))) {
+
+ ++card->wandev.stats.tx_dropped;
+ netif_start_queue(dev);
+ goto if_send_exit_crit;
+ }
+
+ api_tx_hdr = (api_tx_hdr_t *)data;
+ attr = api_tx_hdr->attr;
+ data += sizeof(api_tx_hdr_t);
+ len -= sizeof(api_tx_hdr_t);
+ }
+
+ if(chdlc_send(card, data, len)) {
+ netif_stop_queue(dev);
+ }else{
+ ++card->wandev.stats.tx_packets;
+ card->wandev.stats.tx_bytes += len;
+
+ netif_start_queue(dev);
+
+ dev->trans_start = jiffies;
+ }
+ }
+
+if_send_exit_crit:
+
+ if (!(err=netif_queue_stopped(dev))) {
+ dev_kfree_skb_any(skb);
+ }else{
+ chdlc_priv_area->tick_counter = jiffies;
+ chdlc_int->interrupt_permission |= APP_INT_ON_TX_FRAME;
+ }
+
+ clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
+ if(card->hw.type != SDLA_S514){
+ s508_unlock(card,&smp_flags);
+ }
+
+ return err;
+}
+
+
+/*============================================================================
+ * Check to see if the packet to be transmitted contains a broadcast or
+ * multicast source IP address.
+ */
+
+static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev,
+ struct sk_buff *skb)
+{
+ u32 src_ip_addr;
+ u32 broadcast_ip_addr = 0;
+ struct in_device *in_dev;
+
+ /* read the IP source address from the outgoing packet */
+ src_ip_addr = *(u32 *)(skb->data + 12);
+
+ /* read the IP broadcast address for the device */
+ in_dev = dev->ip_ptr;
+ if(in_dev != NULL) {
+ struct in_ifaddr *ifa= in_dev->ifa_list;
+ if(ifa != NULL)
+ broadcast_ip_addr = ifa->ifa_broadcast;
+ else
+ return 0;
+ }
+
+ /* check if the IP Source Address is a Broadcast address */
+ if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) {
+ printk(KERN_INFO "%s: Broadcast Source Address silently discarded\n",
+ card->devname);
+ return 1;
+ }
+
+ /* check if the IP Source Address is a Multicast address */
+ if((ntohl(src_ip_addr) >= 0xE0000001) &&
+ (ntohl(src_ip_addr) <= 0xFFFFFFFE)) {
+ printk(KERN_INFO "%s: Multicast Source Address silently discarded\n",
+ card->devname);
+ return 1;
+ }
+
+ return 0;
+}
+
+
+/*============================================================================
+ * Reply to UDP Management system.
+ * Return length of reply.
+ */
+static int reply_udp( unsigned char *data, unsigned int mbox_len )
+{
+
+ unsigned short len, udp_length, temp, ip_length;
+ unsigned long ip_temp;
+ int even_bound = 0;
+ chdlc_udp_pkt_t *c_udp_pkt = (chdlc_udp_pkt_t *)data;
+
+ /* Set length of packet */
+ len = sizeof(ip_pkt_t)+
+ sizeof(udp_pkt_t)+
+ sizeof(wp_mgmt_t)+
+ sizeof(cblock_t)+
+ sizeof(trace_info_t)+
+ mbox_len;
+
+ /* fill in UDP reply */
+ c_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY;
+
+ /* fill in UDP length */
+ udp_length = sizeof(udp_pkt_t)+
+ sizeof(wp_mgmt_t)+
+ sizeof(cblock_t)+
+ sizeof(trace_info_t)+
+ mbox_len;
+
+ /* put it on an even boundary */
+ if ( udp_length & 0x0001 ) {
+ udp_length += 1;
+ len += 1;
+ even_bound = 1;
+ }
+
+ temp = (udp_length<<8)|(udp_length>>8);
+ c_udp_pkt->udp_pkt.udp_length = temp;
+
+ /* swap UDP ports */
+ temp = c_udp_pkt->udp_pkt.udp_src_port;
+ c_udp_pkt->udp_pkt.udp_src_port =
+ c_udp_pkt->udp_pkt.udp_dst_port;
+ c_udp_pkt->udp_pkt.udp_dst_port = temp;
+
+ /* add UDP pseudo header */
+ temp = 0x1100;
+ *((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound)) = temp;
+ temp = (udp_length<<8)|(udp_length>>8);
+ *((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound+2)) = temp;
+
+
+ /* calculate UDP checksum */
+ c_udp_pkt->udp_pkt.udp_checksum = 0;
+ c_udp_pkt->udp_pkt.udp_checksum = calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET);
+
+ /* fill in IP length */
+ ip_length = len;
+ temp = (ip_length<<8)|(ip_length>>8);
+ c_udp_pkt->ip_pkt.total_length = temp;
+
+ /* swap IP addresses */
+ ip_temp = c_udp_pkt->ip_pkt.ip_src_address;
+ c_udp_pkt->ip_pkt.ip_src_address = c_udp_pkt->ip_pkt.ip_dst_address;
+ c_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
+
+ /* fill in IP checksum */
+ c_udp_pkt->ip_pkt.hdr_checksum = 0;
+ c_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data,sizeof(ip_pkt_t));
+
+ return len;
+
+} /* reply_udp */
+
+unsigned short calc_checksum (char *data, int len)
+{
+ unsigned short temp;
+ unsigned long sum=0;
+ int i;
+
+ for( i = 0; i <len; i+=2 ) {
+ memcpy(&temp,&data[i],2);
+ sum += (unsigned long)temp;
+ }
+
+ while (sum >> 16 ) {
+ sum = (sum & 0xffffUL) + (sum >> 16);
+ }
+
+ temp = (unsigned short)sum;
+ temp = ~temp;
+
+ if( temp == 0 )
+ temp = 0xffff;
+
+ return temp;
+}
+
+
+/*============================================================================
+ * Get ethernet-style interface statistics.
+ * Return a pointer to struct enet_statistics.
+ */
+static struct net_device_stats* if_stats(struct net_device* dev)
+{
+ sdla_t *my_card;
+ chdlc_private_area_t* chdlc_priv_area;
+
+ if ((chdlc_priv_area=dev->priv) == NULL)
+ return NULL;
+
+ my_card = chdlc_priv_area->card;
+ return &my_card->wandev.stats;
+}
+
+
+/****** Cisco HDLC Firmware Interface Functions *******************************/
+
+/*============================================================================
+ * Read firmware code version.
+ * Put code version as ASCII string in str.
+ */
+static int chdlc_read_version (sdla_t* card, char* str)
+{
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ int len;
+ char err;
+ mb->buffer_length = 0;
+ mb->command = READ_CHDLC_CODE_VERSION;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+
+ if(err != COMMAND_OK) {
+ chdlc_error(card,err,mb);
+ }
+ else if (str) { /* is not null */
+ len = mb->buffer_length;
+ memcpy(str, mb->data, len);
+ str[len] = '\0';
+ }
+ return (err);
+}
+
+/*-----------------------------------------------------------------------------
+ * Configure CHDLC firmware.
+ */
+static int chdlc_configure (sdla_t* card, void* data)
+{
+ int err;
+ CHDLC_MAILBOX_STRUCT *mailbox = card->mbox;
+ int data_length = sizeof(CHDLC_CONFIGURATION_STRUCT);
+
+ mailbox->buffer_length = data_length;
+ memcpy(mailbox->data, data, data_length);
+ mailbox->command = SET_CHDLC_CONFIGURATION;
+ err = sdla_exec(mailbox) ? mailbox->return_code : CMD_TIMEOUT;
+
+ if (err != COMMAND_OK) chdlc_error (card, err, mailbox);
+
+ return err;
+}
+
+
+/*============================================================================
+ * Set interrupt mode -- HDLC Version.
+ */
+
+static int chdlc_set_intr_mode (sdla_t* card, unsigned mode)
+{
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ CHDLC_INT_TRIGGERS_STRUCT* int_data =
+ (CHDLC_INT_TRIGGERS_STRUCT *)mb->data;
+ int err;
+
+ int_data->CHDLC_interrupt_triggers = mode;
+ int_data->IRQ = card->hw.irq;
+ int_data->interrupt_timer = 1;
+
+ mb->buffer_length = sizeof(CHDLC_INT_TRIGGERS_STRUCT);
+ mb->command = SET_CHDLC_INTERRUPT_TRIGGERS;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error (card, err, mb);
+ return err;
+}
+
+
+/*===========================================================
+ * chdlc_disable_comm_shutdown
+ *
+ * Shutdown() disables the communications. We must
+ * have a sparate functions, because we must not
+ * call chdlc_error() hander since the private
+ * area has already been replaced */
+
+static int chdlc_disable_comm_shutdown (sdla_t *card)
+{
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ CHDLC_INT_TRIGGERS_STRUCT* int_data =
+ (CHDLC_INT_TRIGGERS_STRUCT *)mb->data;
+ int err;
+
+ /* Disable Interrutps */
+ int_data->CHDLC_interrupt_triggers = 0;
+ int_data->IRQ = card->hw.irq;
+ int_data->interrupt_timer = 1;
+
+ mb->buffer_length = sizeof(CHDLC_INT_TRIGGERS_STRUCT);
+ mb->command = SET_CHDLC_INTERRUPT_TRIGGERS;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+
+ /* Disable Communications */
+
+ if (card->u.c.async_mode) {
+ mb->command = DISABLE_ASY_COMMUNICATIONS;
+ }else{
+ mb->command = DISABLE_CHDLC_COMMUNICATIONS;
+ }
+
+ mb->buffer_length = 0;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+
+ card->u.c.comm_enabled = 0;
+
+ return 0;
+}
+
+/*============================================================================
+ * Enable communications.
+ */
+
+static int chdlc_comm_enable (sdla_t* card)
+{
+ int err;
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+
+ mb->buffer_length = 0;
+ mb->command = ENABLE_CHDLC_COMMUNICATIONS;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error(card, err, mb);
+ else
+ card->u.c.comm_enabled = 1;
+
+ return err;
+}
+
+/*============================================================================
+ * Read communication error statistics.
+ */
+static int chdlc_read_comm_err_stats (sdla_t* card)
+{
+ int err;
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+
+ mb->buffer_length = 0;
+ mb->command = READ_COMMS_ERROR_STATS;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error(card,err,mb);
+ return err;
+}
+
+
+/*============================================================================
+ * Read CHDLC operational statistics.
+ */
+static int chdlc_read_op_stats (sdla_t* card)
+{
+ int err;
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+
+ mb->buffer_length = 0;
+ mb->command = READ_CHDLC_OPERATIONAL_STATS;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error(card,err,mb);
+ return err;
+}
+
+
+/*============================================================================
+ * Update communications error and general packet statistics.
+ */
+static int update_comms_stats(sdla_t* card,
+ chdlc_private_area_t* chdlc_priv_area)
+{
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ COMMS_ERROR_STATS_STRUCT* err_stats;
+ CHDLC_OPERATIONAL_STATS_STRUCT *op_stats;
+
+ /* on the first timer interrupt, read the comms error statistics */
+ if(chdlc_priv_area->update_comms_stats == 2) {
+ if(chdlc_read_comm_err_stats(card))
+ return 1;
+ err_stats = (COMMS_ERROR_STATS_STRUCT *)mb->data;
+ card->wandev.stats.rx_over_errors =
+ err_stats->Rx_overrun_err_count;
+ card->wandev.stats.rx_crc_errors =
+ err_stats->CRC_err_count;
+ card->wandev.stats.rx_frame_errors =
+ err_stats->Rx_abort_count;
+ card->wandev.stats.rx_fifo_errors =
+ err_stats->Rx_dis_pri_bfrs_full_count;
+ card->wandev.stats.rx_missed_errors =
+ card->wandev.stats.rx_fifo_errors;
+ card->wandev.stats.tx_aborted_errors =
+ err_stats->sec_Tx_abort_count;
+ }
+
+ /* on the second timer interrupt, read the operational statistics */
+ else {
+ if(chdlc_read_op_stats(card))
+ return 1;
+ op_stats = (CHDLC_OPERATIONAL_STATS_STRUCT *)mb->data;
+ card->wandev.stats.rx_length_errors =
+ (op_stats->Rx_Data_discard_short_count +
+ op_stats->Rx_Data_discard_long_count);
+ }
+
+ return 0;
+}
+
+/*============================================================================
+ * Send packet.
+ * Return: 0 - o.k.
+ * 1 - no transmit buffers available
+ */
+static int chdlc_send (sdla_t* card, void* data, unsigned len)
+{
+ CHDLC_DATA_TX_STATUS_EL_STRUCT *txbuf = card->u.c.txbuf;
+
+ if (txbuf->opp_flag)
+ return 1;
+
+ sdla_poke(&card->hw, txbuf->ptr_data_bfr, data, len);
+
+ txbuf->frame_length = len;
+ txbuf->opp_flag = 1; /* start transmission */
+
+ /* Update transmit buffer control fields */
+ card->u.c.txbuf = ++txbuf;
+
+ if ((void*)txbuf > card->u.c.txbuf_last)
+ card->u.c.txbuf = card->u.c.txbuf_base;
+
+ return 0;
+}
+
+/****** Firmware Error Handler **********************************************/
+
+/*============================================================================
+ * Firmware error handler.
+ * This routine is called whenever firmware command returns non-zero
+ * return code.
+ *
+ * Return zero if previous command has to be cancelled.
+ */
+static int chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *mb)
+{
+ unsigned cmd = mb->command;
+
+ switch (err) {
+
+ case CMD_TIMEOUT:
+ printk(KERN_INFO "%s: command 0x%02X timed out!\n",
+ card->devname, cmd);
+ break;
+
+ case S514_BOTH_PORTS_SAME_CLK_MODE:
+ if(cmd == SET_CHDLC_CONFIGURATION) {
+ printk(KERN_INFO
+ "%s: Configure both ports for the same clock source\n",
+ card->devname);
+ break;
+ }
+
+ default:
+ printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n",
+ card->devname, cmd, err);
+ }
+
+ return 0;
+}
+
+
+/********** Bottom Half Handlers ********************************************/
+
+/* NOTE: There is no API, BH support for Kernels lower than 2.2.X.
+ * DO NOT INSERT ANY CODE HERE, NOTICE THE
+ * PREPROCESSOR STATEMENT ABOVE, UNLESS YOU KNOW WHAT YOU ARE
+ * DOING */
+
+static void chdlc_work(struct net_device * dev)
+{
+ chdlc_private_area_t* chan = dev->priv;
+ sdla_t *card = chan->card;
+ struct sk_buff *skb;
+
+ if (atomic_read(&chan->bh_buff_used) == 0){
+ clear_bit(0, &chan->tq_working);
+ return;
+ }
+
+ while (atomic_read(&chan->bh_buff_used)){
+
+ skb = ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb;
+
+ if (skb != NULL){
+
+ if (chan->common.sk == NULL || chan->common.func == NULL){
+ ++card->wandev.stats.rx_dropped;
+ dev_kfree_skb_any(skb);
+ chdlc_work_cleanup(dev);
+ continue;
+ }
+
+ if (chan->common.func(skb,dev,chan->common.sk) != 0){
+ /* Sock full cannot send, queue us for another
+ * try */
+ atomic_set(&chan->common.receive_block,1);
+ return;
+ }else{
+ chdlc_work_cleanup(dev);
+ }
+ }else{
+ chdlc_work_cleanup(dev);
+ }
+ }
+ clear_bit(0, &chan->tq_working);
+
+ return;
+}
+
+static int chdlc_work_cleanup(struct net_device *dev)
+{
+ chdlc_private_area_t* chan = dev->priv;
+
+ ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL;
+
+ if (chan->bh_read == MAX_BH_BUFF){
+ chan->bh_read=0;
+ }else{
+ ++chan->bh_read;
+ }
+
+ atomic_dec(&chan->bh_buff_used);
+ return 0;
+}
+
+
+
+static int bh_enqueue(struct net_device *dev, struct sk_buff *skb)
+{
+ /* Check for full */
+ chdlc_private_area_t* chan = dev->priv;
+ sdla_t *card = chan->card;
+
+ if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){
+ ++card->wandev.stats.rx_dropped;
+ dev_kfree_skb_any(skb);
+ return 1;
+ }
+
+ ((bh_data_t *)&chan->bh_head[chan->bh_write])->skb = skb;
+
+ if (chan->bh_write == MAX_BH_BUFF){
+ chan->bh_write=0;
+ }else{
+ ++chan->bh_write;
+ }
+
+ atomic_inc(&chan->bh_buff_used);
+
+ return 0;
+}
+
+/* END OF API BH Support */
+
+
+/****** Interrupt Handlers **************************************************/
+
+/*============================================================================
+ * Cisco HDLC interrupt service routine.
+ */
+static void wpc_isr (sdla_t* card)
+{
+ struct net_device* dev;
+ SHARED_MEMORY_INFO_STRUCT* flags = NULL;
+ int i;
+ sdla_t *my_card;
+
+
+ /* Check for which port the interrupt has been generated
+ * Since Secondary Port is piggybacking on the Primary
+ * the check must be done here.
+ */
+
+ flags = card->u.c.flags;
+ if (!flags->interrupt_info_struct.interrupt_type){
+ /* Check for a second port (piggybacking) */
+ if ((my_card = card->next)){
+ flags = my_card->u.c.flags;
+ if (flags->interrupt_info_struct.interrupt_type){
+ card = my_card;
+ card->isr(card);
+ return;
+ }
+ }
+ }
+
+ flags = card->u.c.flags;
+ card->in_isr = 1;
+ dev = card->wandev.dev;
+
+ /* If we get an interrupt with no network device, stop the interrupts
+ * and issue an error */
+ if (!card->tty_opt && !dev &&
+ flags->interrupt_info_struct.interrupt_type !=
+ COMMAND_COMPLETE_APP_INT_PEND){
+
+ goto isr_done;
+ }
+
+ /* if critical due to peripheral operations
+ * ie. update() or getstats() then reset the interrupt and
+ * wait for the board to retrigger.
+ */
+ if(test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
+ printk(KERN_INFO "ISR CRIT TO PERI\n");
+ goto isr_done;
+ }
+
+ /* On a 508 Card, if critical due to if_send
+ * Major Error !!! */
+ if(card->hw.type != SDLA_S514) {
+ if(test_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
+ printk(KERN_INFO "%s: Critical while in ISR: %lx\n",
+ card->devname, card->wandev.critical);
+ card->in_isr = 0;
+ flags->interrupt_info_struct.interrupt_type = 0;
+ return;
+ }
+ }
+
+ switch(flags->interrupt_info_struct.interrupt_type) {
+
+ case RX_APP_INT_PEND: /* 0x01: receive interrupt */
+ rx_intr(card);
+ break;
+
+ case TX_APP_INT_PEND: /* 0x02: transmit interrupt */
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~APP_INT_ON_TX_FRAME;
+
+ if (card->tty_opt){
+ wanpipe_tty_trigger_poll(card);
+ break;
+ }
+
+ if (dev && netif_queue_stopped(dev)){
+ if (card->u.c.usedby == API){
+ netif_start_queue(dev);
+ wakeup_sk_bh(dev);
+ }else{
+ netif_wake_queue(dev);
+ }
+ }
+ break;
+
+ case COMMAND_COMPLETE_APP_INT_PEND:/* 0x04: cmd cplt */
+ ++ Intr_test_counter;
+ break;
+
+ case CHDLC_EXCEP_COND_APP_INT_PEND: /* 0x20 */
+ process_chdlc_exception(card);
+ break;
+
+ case GLOBAL_EXCEP_COND_APP_INT_PEND:
+ process_global_exception(card);
+ break;
+
+ case TIMER_APP_INT_PEND:
+ timer_intr(card);
+ break;
+
+ default:
+ printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n",
+ card->devname,
+ flags->interrupt_info_struct.interrupt_type);
+ printk(KERN_INFO "Code name: ");
+ for(i = 0; i < 4; i ++)
+ printk(KERN_INFO "%c",
+ flags->global_info_struct.codename[i]);
+ printk(KERN_INFO "\nCode version: ");
+ for(i = 0; i < 4; i ++)
+ printk(KERN_INFO "%c",
+ flags->global_info_struct.codeversion[i]);
+ printk(KERN_INFO "\n");
+ break;
+ }
+
+isr_done:
+
+ card->in_isr = 0;
+ flags->interrupt_info_struct.interrupt_type = 0;
+ return;
+}
+
+/*============================================================================
+ * Receive interrupt handler.
+ */
+static void rx_intr (sdla_t* card)
+{
+ struct net_device *dev;
+ chdlc_private_area_t *chdlc_priv_area;
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+ CHDLC_DATA_RX_STATUS_EL_STRUCT *rxbuf = card->u.c.rxmb;
+ struct sk_buff *skb;
+ unsigned len;
+ unsigned addr = rxbuf->ptr_data_bfr;
+ void *buf;
+ int i,udp_type;
+
+ if (rxbuf->opp_flag != 0x01) {
+ printk(KERN_INFO
+ "%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n",
+ card->devname, (unsigned)rxbuf, rxbuf->opp_flag);
+ printk(KERN_INFO "Code name: ");
+ for(i = 0; i < 4; i ++)
+ printk(KERN_INFO "%c",
+ flags->global_info_struct.codename[i]);
+ printk(KERN_INFO "\nCode version: ");
+ for(i = 0; i < 4; i ++)
+ printk(KERN_INFO "%c",
+ flags->global_info_struct.codeversion[i]);
+ printk(KERN_INFO "\n");
+
+
+ /* Bug Fix: Mar 6 2000
+ * If we get a corrupted mailbox, it measn that driver
+ * is out of sync with the firmware. There is no recovery.
+ * If we don't turn off all interrupts for this card
+ * the machine will crash.
+ */
+ printk(KERN_INFO "%s: Critical router failure ...!!!\n", card->devname);
+ printk(KERN_INFO "Please contact Sangoma Technologies !\n");
+ chdlc_set_intr_mode(card,0);
+ return;
+ }
+
+ len = rxbuf->frame_length;
+
+ if (card->tty_opt){
+
+ if (rxbuf->error_flag){
+ goto rx_exit;
+ }
+
+ if (len <= CRC_LENGTH){
+ goto rx_exit;
+ }
+
+ if (!card->u.c.async_mode){
+ len -= CRC_LENGTH;
+ }
+
+ wanpipe_tty_receive(card,addr,len);
+ goto rx_exit;
+ }
+
+ dev = card->wandev.dev;
+
+ if (!dev){
+ goto rx_exit;
+ }
+
+ if (!netif_running(dev))
+ goto rx_exit;
+
+ chdlc_priv_area = dev->priv;
+
+
+ /* Allocate socket buffer */
+ skb = dev_alloc_skb(len);
+
+ if (skb == NULL) {
+ printk(KERN_INFO "%s: no socket buffers available!\n",
+ card->devname);
+ ++card->wandev.stats.rx_dropped;
+ goto rx_exit;
+ }
+
+ /* Copy data to the socket buffer */
+ if((addr + len) > card->u.c.rx_top + 1) {
+ unsigned tmp = card->u.c.rx_top - addr + 1;
+ buf = skb_put(skb, tmp);
+ sdla_peek(&card->hw, addr, buf, tmp);
+ addr = card->u.c.rx_base;
+ len -= tmp;
+ }
+
+ buf = skb_put(skb, len);
+ sdla_peek(&card->hw, addr, buf, len);
+
+ skb->protocol = htons(ETH_P_IP);
+
+ card->wandev.stats.rx_packets ++;
+ card->wandev.stats.rx_bytes += skb->len;
+ udp_type = udp_pkt_type( skb, card );
+
+ if(udp_type == UDP_CPIPE_TYPE) {
+ if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK,
+ card, skb, dev, chdlc_priv_area)) {
+ flags->interrupt_info_struct.
+ interrupt_permission |=
+ APP_INT_ON_TIMER;
+ }
+ } else if(card->u.c.usedby == API) {
+
+ api_rx_hdr_t* api_rx_hdr;
+ skb_push(skb, sizeof(api_rx_hdr_t));
+ api_rx_hdr = (api_rx_hdr_t*)&skb->data[0x00];
+ api_rx_hdr->error_flag = rxbuf->error_flag;
+ api_rx_hdr->time_stamp = rxbuf->time_stamp;
+
+ skb->protocol = htons(PVC_PROT);
+ skb->mac.raw = skb->data;
+ skb->dev = dev;
+ skb->pkt_type = WAN_PACKET_DATA;
+
+ bh_enqueue(dev, skb);
+
+ if (!test_and_set_bit(0,&chdlc_priv_area->tq_working))
+ wanpipe_queue_work(&chdlc_priv_area->common.wanpipe_work);
+ }else{
+ /* FIXME: we should check to see if the received packet is a
+ multicast packet so that we can increment the multicast
+ statistic
+ ++ chdlc_priv_area->if_stats.multicast;
+ */
+ /* Pass it up the protocol stack */
+
+ skb->dev = dev;
+ skb->mac.raw = skb->data;
+ netif_rx(skb);
+ dev->last_rx = jiffies;
+ }
+
+rx_exit:
+ /* Release buffer element and calculate a pointer to the next one */
+ rxbuf->opp_flag = 0x00;
+ card->u.c.rxmb = ++ rxbuf;
+ if((void*)rxbuf > card->u.c.rxbuf_last){
+ card->u.c.rxmb = card->u.c.rxbuf_base;
+ }
+}
+
+/*============================================================================
+ * Timer interrupt handler.
+ * The timer interrupt is used for two purposes:
+ * 1) Processing udp calls from 'cpipemon'.
+ * 2) Reading board-level statistics for updating the proc file system.
+ */
+void timer_intr(sdla_t *card)
+{
+ struct net_device* dev;
+ chdlc_private_area_t* chdlc_priv_area = NULL;
+ SHARED_MEMORY_INFO_STRUCT* flags = NULL;
+
+ if ((dev = card->wandev.dev)==NULL){
+ flags = card->u.c.flags;
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~APP_INT_ON_TIMER;
+ return;
+ }
+
+ chdlc_priv_area = dev->priv;
+
+ if (chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_CONFIG) {
+ if (!config_chdlc(card)){
+ chdlc_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_CONFIG;
+ }
+ }
+
+ /* process a udp call if pending */
+ if(chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UDP) {
+ process_udp_mgmt_pkt(card, dev,
+ chdlc_priv_area);
+ chdlc_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
+ }
+
+ /* read the communications statistics if required */
+ if(chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE) {
+ update_comms_stats(card, chdlc_priv_area);
+ if(!(-- chdlc_priv_area->update_comms_stats)) {
+ chdlc_priv_area->timer_int_enabled &=
+ ~TMR_INT_ENABLED_UPDATE;
+ }
+ }
+
+ /* only disable the timer interrupt if there are no udp or statistic */
+ /* updates pending */
+ if(!chdlc_priv_area->timer_int_enabled) {
+ flags = card->u.c.flags;
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~APP_INT_ON_TIMER;
+ }
+}
+
+/*------------------------------------------------------------------------------
+ Miscellaneous Functions
+ - set_chdlc_config() used to set configuration options on the board
+------------------------------------------------------------------------------*/
+
+static int set_chdlc_config(sdla_t* card)
+{
+ CHDLC_CONFIGURATION_STRUCT cfg;
+
+ memset(&cfg, 0, sizeof(CHDLC_CONFIGURATION_STRUCT));
+
+ if(card->wandev.clocking){
+ cfg.baud_rate = card->wandev.bps;
+ }
+
+ cfg.line_config_options = (card->wandev.interface == WANOPT_RS232) ?
+ INTERFACE_LEVEL_RS232 : INTERFACE_LEVEL_V35;
+
+ cfg.modem_config_options = 0;
+ cfg.modem_status_timer = 100;
+
+ cfg.CHDLC_protocol_options = card->u.c.protocol_options;
+
+ if (card->tty_opt){
+ cfg.CHDLC_API_options = DISCARD_RX_ERROR_FRAMES;
+ }
+
+ cfg.percent_data_buffer_for_Tx = (card->u.c.receive_only) ? 0 : 50;
+ cfg.CHDLC_statistics_options = (CHDLC_TX_DATA_BYTE_COUNT_STAT |
+ CHDLC_RX_DATA_BYTE_COUNT_STAT);
+
+ if (card->tty_opt){
+ card->wandev.mtu = TTY_CHDLC_MAX_MTU;
+ }
+ cfg.max_CHDLC_data_field_length = card->wandev.mtu;
+ cfg.transmit_keepalive_timer = card->u.c.kpalv_tx;
+ cfg.receive_keepalive_timer = card->u.c.kpalv_rx;
+ cfg.keepalive_error_tolerance = card->u.c.kpalv_err;
+ cfg.SLARP_request_timer = card->u.c.slarp_timer;
+
+ if (cfg.SLARP_request_timer) {
+ cfg.IP_address = 0;
+ cfg.IP_netmask = 0;
+
+ }else if (card->wandev.dev){
+ struct net_device *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area = dev->priv;
+
+ struct in_device *in_dev = dev->ip_ptr;
+
+ if(in_dev != NULL) {
+ struct in_ifaddr *ifa = in_dev->ifa_list;
+
+ if (ifa != NULL ) {
+ cfg.IP_address = ntohl(ifa->ifa_local);
+ cfg.IP_netmask = ntohl(ifa->ifa_mask);
+ chdlc_priv_area->IP_address = ntohl(ifa->ifa_local);
+ chdlc_priv_area->IP_netmask = ntohl(ifa->ifa_mask);
+ }
+ }
+
+ /* FIXME: We must re-think this message in next release
+ if((cfg.IP_address & 0x000000FF) > 2) {
+ printk(KERN_WARNING "\n");
+ printk(KERN_WARNING " WARNING:%s configured with an\n",
+ card->devname);
+ printk(KERN_WARNING " invalid local IP address.\n");
+ printk(KERN_WARNING " Slarp pragmatics will fail.\n");
+ printk(KERN_WARNING " IP address should be of the\n");
+ printk(KERN_WARNING " format A.B.C.1 or A.B.C.2.\n");
+ }
+ */
+ }
+
+ return chdlc_configure(card, &cfg);
+}
+
+
+/*-----------------------------------------------------------------------------
+ set_asy_config() used to set asynchronous configuration options on the board
+------------------------------------------------------------------------------*/
+
+static int set_asy_config(sdla_t* card)
+{
+
+ ASY_CONFIGURATION_STRUCT cfg;
+ CHDLC_MAILBOX_STRUCT *mailbox = card->mbox;
+ int err;
+
+ memset(&cfg, 0, sizeof(ASY_CONFIGURATION_STRUCT));
+
+ if(card->wandev.clocking)
+ cfg.baud_rate = card->wandev.bps;
+
+ cfg.line_config_options = (card->wandev.interface == WANOPT_RS232) ?
+ INTERFACE_LEVEL_RS232 : INTERFACE_LEVEL_V35;
+
+ cfg.modem_config_options = 0;
+ cfg.asy_API_options = card->u.c.api_options;
+ cfg.asy_protocol_options = card->u.c.protocol_options;
+ cfg.Tx_bits_per_char = card->u.c.tx_bits_per_char;
+ cfg.Rx_bits_per_char = card->u.c.rx_bits_per_char;
+ cfg.stop_bits = card->u.c.stop_bits;
+ cfg.parity = card->u.c.parity;
+ cfg.break_timer = card->u.c.break_timer;
+ cfg.asy_Rx_inter_char_timer = card->u.c.inter_char_timer;
+ cfg.asy_Rx_complete_length = card->u.c.rx_complete_length;
+ cfg.XON_char = card->u.c.xon_char;
+ cfg.XOFF_char = card->u.c.xoff_char;
+ cfg.asy_statistics_options = (CHDLC_TX_DATA_BYTE_COUNT_STAT |
+ CHDLC_RX_DATA_BYTE_COUNT_STAT);
+
+ mailbox->buffer_length = sizeof(ASY_CONFIGURATION_STRUCT);
+ memcpy(mailbox->data, &cfg, mailbox->buffer_length);
+ mailbox->command = SET_ASY_CONFIGURATION;
+ err = sdla_exec(mailbox) ? mailbox->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error (card, err, mailbox);
+ return err;
+}
+
+/*============================================================================
+ * Enable asynchronous communications.
+ */
+
+static int asy_comm_enable (sdla_t* card)
+{
+
+ int err;
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+
+ mb->buffer_length = 0;
+ mb->command = ENABLE_ASY_COMMUNICATIONS;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK && card->wandev.dev)
+ chdlc_error(card, err, mb);
+
+ if (!err)
+ card->u.c.comm_enabled = 1;
+
+ return err;
+}
+
+/*============================================================================
+ * Process global exception condition
+ */
+static int process_global_exception(sdla_t *card)
+{
+ CHDLC_MAILBOX_STRUCT* mbox = card->mbox;
+ int err;
+
+ mbox->buffer_length = 0;
+ mbox->command = READ_GLOBAL_EXCEPTION_CONDITION;
+ err = sdla_exec(mbox) ? mbox->return_code : CMD_TIMEOUT;
+
+ if(err != CMD_TIMEOUT ){
+
+ switch(mbox->return_code) {
+
+ case EXCEP_MODEM_STATUS_CHANGE:
+
+ printk(KERN_INFO "%s: Modem status change\n",
+ card->devname);
+
+ switch(mbox->data[0] & (DCD_HIGH | CTS_HIGH)) {
+ case (DCD_HIGH):
+ printk(KERN_INFO "%s: DCD high, CTS low\n",card->devname);
+ break;
+ case (CTS_HIGH):
+ printk(KERN_INFO "%s: DCD low, CTS high\n",card->devname);
+ break;
+ case ((DCD_HIGH | CTS_HIGH)):
+ printk(KERN_INFO "%s: DCD high, CTS high\n",card->devname);
+ break;
+ default:
+ printk(KERN_INFO "%s: DCD low, CTS low\n",card->devname);
+ break;
+ }
+ break;
+
+ case EXCEP_TRC_DISABLED:
+ printk(KERN_INFO "%s: Line trace disabled\n",
+ card->devname);
+ break;
+
+ case EXCEP_IRQ_TIMEOUT:
+ printk(KERN_INFO "%s: IRQ timeout occurred\n",
+ card->devname);
+ break;
+
+ case 0x17:
+ if (card->tty_opt){
+ if (card->tty && card->tty_open){
+ printk(KERN_INFO
+ "%s: Modem Hangup Exception: Hanging Up!\n",
+ card->devname);
+ tty_hangup(card->tty);
+ }
+ break;
+ }
+
+ /* If TTY is not used just drop throught */
+
+ default:
+ printk(KERN_INFO "%s: Global exception %x\n",
+ card->devname, mbox->return_code);
+ break;
+ }
+ }
+ return 0;
+}
+
+
+/*============================================================================
+ * Process chdlc exception condition
+ */
+static int process_chdlc_exception(sdla_t *card)
+{
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ int err;
+
+ mb->buffer_length = 0;
+ mb->command = READ_CHDLC_EXCEPTION_CONDITION;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if(err != CMD_TIMEOUT) {
+
+ switch (err) {
+
+ case EXCEP_LINK_ACTIVE:
+ port_set_state(card, WAN_CONNECTED);
+ trigger_chdlc_poll(card->wandev.dev);
+ break;
+
+ case EXCEP_LINK_INACTIVE_MODEM:
+ port_set_state(card, WAN_DISCONNECTED);
+ unconfigure_ip(card);
+ trigger_chdlc_poll(card->wandev.dev);
+ break;
+
+ case EXCEP_LINK_INACTIVE_KPALV:
+ port_set_state(card, WAN_DISCONNECTED);
+ printk(KERN_INFO "%s: Keepalive timer expired.\n",
+ card->devname);
+ unconfigure_ip(card);
+ trigger_chdlc_poll(card->wandev.dev);
+ break;
+
+ case EXCEP_IP_ADDRESS_DISCOVERED:
+ if (configure_ip(card))
+ return -1;
+ break;
+
+ case EXCEP_LOOPBACK_CONDITION:
+ printk(KERN_INFO "%s: Loopback Condition Detected.\n",
+ card->devname);
+ break;
+
+ case NO_CHDLC_EXCEP_COND_TO_REPORT:
+ printk(KERN_INFO "%s: No exceptions reported.\n",
+ card->devname);
+ break;
+ }
+
+ }
+ return 0;
+}
+
+
+/*============================================================================
+ * Configure IP from SLARP negotiation
+ * This adds dynamic routes when SLARP has provided valid addresses
+ */
+
+static int configure_ip (sdla_t* card)
+{
+ struct net_device *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area;
+ char err;
+
+ if (!dev)
+ return 0;
+
+ chdlc_priv_area = dev->priv;
+
+
+ /* set to discover */
+ if(card->u.c.slarp_timer != 0x00) {
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ CHDLC_CONFIGURATION_STRUCT *cfg;
+
+ mb->buffer_length = 0;
+ mb->command = READ_CHDLC_CONFIGURATION;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+
+ if(err != COMMAND_OK) {
+ chdlc_error(card,err,mb);
+ return -1;
+ }
+
+ cfg = (CHDLC_CONFIGURATION_STRUCT *)mb->data;
+ chdlc_priv_area->IP_address = cfg->IP_address;
+ chdlc_priv_area->IP_netmask = cfg->IP_netmask;
+
+ /* Set flag to add route */
+ chdlc_priv_area->route_status = ADD_ROUTE;
+
+ /* The idea here is to add the route in the poll routine.
+ This way, we aren't in interrupt context when adding routes */
+ trigger_chdlc_poll(dev);
+ }
+
+ return 0;
+}
+
+
+/*============================================================================
+ * Un-Configure IP negotiated by SLARP
+ * This removes dynamic routes when the link becomes inactive.
+ */
+
+static int unconfigure_ip (sdla_t* card)
+{
+ struct net_device *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area;
+
+ if (!dev)
+ return 0;
+
+ chdlc_priv_area= dev->priv;
+
+ if (chdlc_priv_area->route_status == ROUTE_ADDED) {
+
+ /* Note: If this function is called, the
+ * port state has been DISCONNECTED. This state
+ * change will trigger a poll_disconnected
+ * function, that will check for this condition.
+ */
+ chdlc_priv_area->route_status = REMOVE_ROUTE;
+
+ }
+ return 0;
+}
+
+/*============================================================================
+ * Routine to add/remove routes
+ * Called like a polling routine when Routes are flagged to be added/removed.
+ */
+
+static void process_route (sdla_t *card)
+{
+ struct net_device *dev = card->wandev.dev;
+ unsigned char port_num;
+ chdlc_private_area_t *chdlc_priv_area = NULL;
+ u32 local_IP_addr = 0;
+ u32 remote_IP_addr = 0;
+ u32 IP_netmask, IP_addr;
+ int err = 0;
+ struct in_device *in_dev;
+ mm_segment_t fs;
+ struct ifreq if_info;
+ struct sockaddr_in *if_data1, *if_data2;
+
+ chdlc_priv_area = dev->priv;
+ port_num = card->u.c.comm_port;
+
+ /* Bug Fix Mar 16 2000
+ * AND the IP address to the Mask before checking
+ * the last two bits. */
+
+ if((chdlc_priv_area->route_status == ADD_ROUTE) &&
+ ((chdlc_priv_area->IP_address & ~chdlc_priv_area->IP_netmask) > 2)) {
+
+ printk(KERN_INFO "%s: Dynamic route failure.\n",card->devname);
+
+ if(card->u.c.slarp_timer) {
+ u32 addr_net = htonl(chdlc_priv_area->IP_address);
+
+ printk(KERN_INFO "%s: Bad IP address %u.%u.%u.%u received\n",
+ card->devname,
+ NIPQUAD(addr_net));
+ printk(KERN_INFO "%s: from remote station.\n",
+ card->devname);
+
+ }else{
+ u32 addr_net = htonl(chdlc_priv_area->IP_address);
+
+ printk(KERN_INFO "%s: Bad IP address %u.%u.%u.%u issued\n",
+ card->devname,
+ NIPQUAD(addr_net));
+ printk(KERN_INFO "%s: to remote station. Local\n",
+ card->devname);
+ printk(KERN_INFO "%s: IP address must be A.B.C.1\n",
+ card->devname);
+ printk(KERN_INFO "%s: or A.B.C.2.\n",card->devname);
+ }
+
+ /* remove the route due to the IP address error condition */
+ chdlc_priv_area->route_status = REMOVE_ROUTE;
+ err = 1;
+ }
+
+ /* If we are removing a route with bad IP addressing, then use the */
+ /* locally configured IP addresses */
+ if((chdlc_priv_area->route_status == REMOVE_ROUTE) && err) {
+
+ /* do not remove a bad route that has already been removed */
+ if(chdlc_priv_area->route_removed) {
+ return;
+ }
+
+ in_dev = dev->ip_ptr;
+
+ if(in_dev != NULL) {
+ struct in_ifaddr *ifa = in_dev->ifa_list;
+ if (ifa != NULL ) {
+ local_IP_addr = ifa->ifa_local;
+ IP_netmask = ifa->ifa_mask;
+ }
+ }
+ }else{
+ /* According to Cisco HDLC, if the point-to-point address is
+ A.B.C.1, then we are the opposite (A.B.C.2), and vice-versa.
+ */
+ IP_netmask = ntohl(chdlc_priv_area->IP_netmask);
+ remote_IP_addr = ntohl(chdlc_priv_area->IP_address);
+
+
+ /* If Netmask is 255.255.255.255 the local address
+ * calculation will fail. Default it back to 255.255.255.0 */
+ if (IP_netmask == 0xffffffff)
+ IP_netmask &= 0x00ffffff;
+
+ /* Bug Fix Mar 16 2000
+ * AND the Remote IP address with IP netmask, instead
+ * of static netmask of 255.255.255.0 */
+ local_IP_addr = (remote_IP_addr & IP_netmask) +
+ (~remote_IP_addr & ntohl(0x0003));
+
+ if(!card->u.c.slarp_timer) {
+ IP_addr = local_IP_addr;
+ local_IP_addr = remote_IP_addr;
+ remote_IP_addr = IP_addr;
+ }
+ }
+
+ fs = get_fs(); /* Save file system */
+ set_fs(get_ds()); /* Get user space block */
+
+ /* Setup a structure for adding/removing routes */
+ memset(&if_info, 0, sizeof(if_info));
+ strcpy(if_info.ifr_name, dev->name);
+
+ switch (chdlc_priv_area->route_status) {
+
+ case ADD_ROUTE:
+
+ if(!card->u.c.slarp_timer) {
+ if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
+ if_data2->sin_addr.s_addr = remote_IP_addr;
+ if_data2->sin_family = AF_INET;
+ err = devinet_ioctl(SIOCSIFDSTADDR, &if_info);
+ } else {
+ if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
+ if_data1->sin_addr.s_addr = local_IP_addr;
+ if_data1->sin_family = AF_INET;
+ if(!(err = devinet_ioctl(SIOCSIFADDR, &if_info))){
+ if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
+ if_data2->sin_addr.s_addr = remote_IP_addr;
+ if_data2->sin_family = AF_INET;
+ err = devinet_ioctl(SIOCSIFDSTADDR, &if_info);
+ }
+ }
+
+ if(err) {
+ printk(KERN_INFO "%s: Add route %u.%u.%u.%u failed (%d)\n",
+ card->devname, NIPQUAD(remote_IP_addr), err);
+ } else {
+ ((chdlc_private_area_t *)dev->priv)->route_status = ROUTE_ADDED;
+ printk(KERN_INFO "%s: Dynamic route added.\n",
+ card->devname);
+ printk(KERN_INFO "%s: Local IP addr : %u.%u.%u.%u\n",
+ card->devname, NIPQUAD(local_IP_addr));
+ printk(KERN_INFO "%s: Remote IP addr: %u.%u.%u.%u\n",
+ card->devname, NIPQUAD(remote_IP_addr));
+ chdlc_priv_area->route_removed = 0;
+ }
+ break;
+
+
+ case REMOVE_ROUTE:
+
+ /* Change the local ip address of the interface to 0.
+ * This will also delete the destination route.
+ */
+ if(!card->u.c.slarp_timer) {
+ if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
+ if_data2->sin_addr.s_addr = 0;
+ if_data2->sin_family = AF_INET;
+ err = devinet_ioctl(SIOCSIFDSTADDR, &if_info);
+ } else {
+ if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
+ if_data1->sin_addr.s_addr = 0;
+ if_data1->sin_family = AF_INET;
+ err = devinet_ioctl(SIOCSIFADDR,&if_info);
+
+ }
+ if(err) {
+ printk(KERN_INFO
+ "%s: Remove route %u.%u.%u.%u failed, (err %d)\n",
+ card->devname, NIPQUAD(remote_IP_addr),
+ err);
+ } else {
+ ((chdlc_private_area_t *)dev->priv)->route_status =
+ NO_ROUTE;
+ printk(KERN_INFO "%s: Dynamic route removed: %u.%u.%u.%u\n",
+ card->devname, NIPQUAD(local_IP_addr));
+ chdlc_priv_area->route_removed = 1;
+ }
+ break;
+ }
+
+ set_fs(fs); /* Restore file system */
+
+}
+
+
+/*=============================================================================
+ * Store a UDP management packet for later processing.
+ */
+
+static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
+ struct sk_buff *skb, struct net_device* dev,
+ chdlc_private_area_t* chdlc_priv_area)
+{
+ int udp_pkt_stored = 0;
+
+ if(!chdlc_priv_area->udp_pkt_lgth &&
+ (skb->len <= MAX_LGTH_UDP_MGNT_PKT)) {
+ chdlc_priv_area->udp_pkt_lgth = skb->len;
+ chdlc_priv_area->udp_pkt_src = udp_pkt_src;
+ memcpy(chdlc_priv_area->udp_pkt_data, skb->data, skb->len);
+ chdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UDP;
+ udp_pkt_stored = 1;
+ }
+
+ if(udp_pkt_src == UDP_PKT_FRM_STACK){
+ dev_kfree_skb_any(skb);
+ }else{
+ dev_kfree_skb_any(skb);
+ }
+
+ return(udp_pkt_stored);
+}
+
+
+/*=============================================================================
+ * Process UDP management packet.
+ */
+
+static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
+ chdlc_private_area_t* chdlc_priv_area )
+{
+ unsigned char *buf;
+ unsigned int frames, len;
+ struct sk_buff *new_skb;
+ unsigned short buffer_length, real_len;
+ unsigned long data_ptr;
+ unsigned data_length;
+ int udp_mgmt_req_valid = 1;
+ CHDLC_MAILBOX_STRUCT *mb = card->mbox;
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+ chdlc_udp_pkt_t *chdlc_udp_pkt;
+ struct timeval tv;
+ int err;
+ char ut_char;
+
+ chdlc_udp_pkt = (chdlc_udp_pkt_t *) chdlc_priv_area->udp_pkt_data;
+
+ if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK){
+
+ /* Only these commands are support for remote debugging.
+ * All others are not */
+ switch(chdlc_udp_pkt->cblock.command) {
+
+ case READ_GLOBAL_STATISTICS:
+ case READ_MODEM_STATUS:
+ case READ_CHDLC_LINK_STATUS:
+ case CPIPE_ROUTER_UP_TIME:
+ case READ_COMMS_ERROR_STATS:
+ case READ_CHDLC_OPERATIONAL_STATS:
+
+ /* These two commands are executed for
+ * each request */
+ case READ_CHDLC_CONFIGURATION:
+ case READ_CHDLC_CODE_VERSION:
+ udp_mgmt_req_valid = 1;
+ break;
+ default:
+ udp_mgmt_req_valid = 0;
+ break;
+ }
+ }
+
+ if(!udp_mgmt_req_valid) {
+
+ /* set length to 0 */
+ chdlc_udp_pkt->cblock.buffer_length = 0;
+
+ /* set return code */
+ chdlc_udp_pkt->cblock.return_code = 0xCD;
+
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: Warning, Illegal UDP command attempted from network: %x\n",
+ card->devname,chdlc_udp_pkt->cblock.command);
+ }
+
+ } else {
+ unsigned long trace_status_cfg_addr = 0;
+ TRACE_STATUS_EL_CFG_STRUCT trace_cfg_struct;
+ TRACE_STATUS_ELEMENT_STRUCT trace_element_struct;
+
+ switch(chdlc_udp_pkt->cblock.command) {
+
+ case CPIPE_ENABLE_TRACING:
+ if (!chdlc_priv_area->TracingEnabled) {
+
+ /* OPERATE_DATALINE_MONITOR */
+
+ mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
+ mb->command = SET_TRACE_CONFIGURATION;
+
+ ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
+ trace_config = TRACE_ACTIVE;
+ /* Trace delay mode is not used because it slows
+ down transfer and results in a standoff situation
+ when there is a lot of data */
+
+ /* Configure the Trace based on user inputs */
+ ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->trace_config |=
+ chdlc_udp_pkt->data[0];
+
+ ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
+ trace_deactivation_timer = 4000;
+
+
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK) {
+ chdlc_error(card,err,mb);
+ card->TracingEnabled = 0;
+ chdlc_udp_pkt->cblock.return_code = err;
+ mb->buffer_length = 0;
+ break;
+ }
+
+ /* Get the base address of the trace element list */
+ mb->buffer_length = 0;
+ mb->command = READ_TRACE_CONFIGURATION;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+
+ if (err != COMMAND_OK) {
+ chdlc_error(card,err,mb);
+ chdlc_priv_area->TracingEnabled = 0;
+ chdlc_udp_pkt->cblock.return_code = err;
+ mb->buffer_length = 0;
+ break;
+ }
+
+ trace_status_cfg_addr =((LINE_TRACE_CONFIG_STRUCT *)
+ mb->data) -> ptr_trace_stat_el_cfg_struct;
+
+ sdla_peek(&card->hw, trace_status_cfg_addr,
+ &trace_cfg_struct, sizeof(trace_cfg_struct));
+
+ chdlc_priv_area->start_trace_addr = trace_cfg_struct.
+ base_addr_trace_status_elements;
+
+ chdlc_priv_area->number_trace_elements =
+ trace_cfg_struct.number_trace_status_elements;
+
+ chdlc_priv_area->end_trace_addr = (unsigned long)
+ ((TRACE_STATUS_ELEMENT_STRUCT *)
+ chdlc_priv_area->start_trace_addr +
+ (chdlc_priv_area->number_trace_elements - 1));
+
+ chdlc_priv_area->base_addr_trace_buffer =
+ trace_cfg_struct.base_addr_trace_buffer;
+
+ chdlc_priv_area->end_addr_trace_buffer =
+ trace_cfg_struct.end_addr_trace_buffer;
+
+ chdlc_priv_area->curr_trace_addr =
+ trace_cfg_struct.next_trace_element_to_use;
+
+ chdlc_priv_area->available_buffer_space = 2000 -
+ sizeof(ip_pkt_t) -
+ sizeof(udp_pkt_t) -
+ sizeof(wp_mgmt_t) -
+ sizeof(cblock_t) -
+ sizeof(trace_info_t);
+ }
+ chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
+ mb->buffer_length = 0;
+ chdlc_priv_area->TracingEnabled = 1;
+ break;
+
+
+ case CPIPE_DISABLE_TRACING:
+ if (chdlc_priv_area->TracingEnabled) {
+
+ /* OPERATE_DATALINE_MONITOR */
+ mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
+ mb->command = SET_TRACE_CONFIGURATION;
+ ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
+ trace_config = TRACE_INACTIVE;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ }
+
+ chdlc_priv_area->TracingEnabled = 0;
+ chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
+ mb->buffer_length = 0;
+ break;
+
+
+ case CPIPE_GET_TRACE_INFO:
+
+ if (!chdlc_priv_area->TracingEnabled) {
+ chdlc_udp_pkt->cblock.return_code = 1;
+ mb->buffer_length = 0;
+ break;
+ }
+
+ chdlc_udp_pkt->trace_info.ismoredata = 0x00;
+ buffer_length = 0; /* offset of packet already occupied */
+
+ for (frames=0; frames < chdlc_priv_area->number_trace_elements; frames++){
+
+ trace_pkt_t *trace_pkt = (trace_pkt_t *)
+ &chdlc_udp_pkt->data[buffer_length];
+
+ sdla_peek(&card->hw, chdlc_priv_area->curr_trace_addr,
+ (unsigned char *)&trace_element_struct,
+ sizeof(TRACE_STATUS_ELEMENT_STRUCT));
+
+ if (trace_element_struct.opp_flag == 0x00) {
+ break;
+ }
+
+ /* get pointer to real data */
+ data_ptr = trace_element_struct.ptr_data_bfr;
+
+ /* See if there is actual data on the trace buffer */
+ if (data_ptr){
+ data_length = trace_element_struct.trace_length;
+ }else{
+ data_length = 0;
+ chdlc_udp_pkt->trace_info.ismoredata = 0x01;
+ }
+
+ if( (chdlc_priv_area->available_buffer_space - buffer_length)
+ < ( sizeof(trace_pkt_t) + data_length) ) {
+
+ /* indicate there are more frames on board & exit */
+ chdlc_udp_pkt->trace_info.ismoredata = 0x01;
+ break;
+ }
+
+ trace_pkt->status = trace_element_struct.trace_type;
+
+ trace_pkt->time_stamp =
+ trace_element_struct.trace_time_stamp;
+
+ trace_pkt->real_length =
+ trace_element_struct.trace_length;
+
+ /* see if we can fit the frame into the user buffer */
+ real_len = trace_pkt->real_length;
+
+ if (data_ptr == 0) {
+ trace_pkt->data_avail = 0x00;
+ } else {
+ unsigned tmp = 0;
+
+ /* get the data from circular buffer
+ must check for end of buffer */
+ trace_pkt->data_avail = 0x01;
+
+ if ((data_ptr + real_len) >
+ chdlc_priv_area->end_addr_trace_buffer + 1){
+
+ tmp = chdlc_priv_area->end_addr_trace_buffer - data_ptr + 1;
+ sdla_peek(&card->hw, data_ptr,
+ trace_pkt->data,tmp);
+ data_ptr = chdlc_priv_area->base_addr_trace_buffer;
+ }
+
+ sdla_peek(&card->hw, data_ptr,
+ &trace_pkt->data[tmp], real_len - tmp);
+ }
+
+ /* zero the opp flag to show we got the frame */
+ ut_char = 0x00;
+ sdla_poke(&card->hw, chdlc_priv_area->curr_trace_addr, &ut_char, 1);
+
+ /* now move onto the next frame */
+ chdlc_priv_area->curr_trace_addr += sizeof(TRACE_STATUS_ELEMENT_STRUCT);
+
+ /* check if we went over the last address */
+ if ( chdlc_priv_area->curr_trace_addr > chdlc_priv_area->end_trace_addr ) {
+ chdlc_priv_area->curr_trace_addr = chdlc_priv_area->start_trace_addr;
+ }
+
+ if(trace_pkt->data_avail == 0x01) {
+ buffer_length += real_len - 1;
+ }
+
+ /* for the header */
+ buffer_length += sizeof(trace_pkt_t);
+
+ } /* For Loop */
+
+ if (frames == chdlc_priv_area->number_trace_elements){
+ chdlc_udp_pkt->trace_info.ismoredata = 0x01;
+ }
+ chdlc_udp_pkt->trace_info.num_frames = frames;
+
+ mb->buffer_length = buffer_length;
+ chdlc_udp_pkt->cblock.buffer_length = buffer_length;
+
+ chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
+
+ break;
+
+
+ case CPIPE_FT1_READ_STATUS:
+ ((unsigned char *)chdlc_udp_pkt->data )[0] =
+ flags->FT1_info_struct.parallel_port_A_input;
+
+ ((unsigned char *)chdlc_udp_pkt->data )[1] =
+ flags->FT1_info_struct.parallel_port_B_input;
+
+ chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
+ chdlc_udp_pkt->cblock.buffer_length = 2;
+ mb->buffer_length = 2;
+ break;
+
+ case CPIPE_ROUTER_UP_TIME:
+ do_gettimeofday( &tv );
+ chdlc_priv_area->router_up_time = tv.tv_sec -
+ chdlc_priv_area->router_start_time;
+ *(unsigned long *)&chdlc_udp_pkt->data =
+ chdlc_priv_area->router_up_time;
+ mb->buffer_length = sizeof(unsigned long);
+ chdlc_udp_pkt->cblock.buffer_length = sizeof(unsigned long);
+ chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
+ break;
+
+ case FT1_MONITOR_STATUS_CTRL:
+ /* Enable FT1 MONITOR STATUS */
+ if ((chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_STATUS) ||
+ (chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_OP_STATS)) {
+
+ if( rCount++ != 0 ) {
+ chdlc_udp_pkt->cblock.
+ return_code = COMMAND_OK;
+ mb->buffer_length = 1;
+ break;
+ }
+ }
+
+ /* Disable FT1 MONITOR STATUS */
+ if( chdlc_udp_pkt->data[0] == 0) {
+
+ if( --rCount != 0) {
+ chdlc_udp_pkt->cblock.
+ return_code = COMMAND_OK;
+ mb->buffer_length = 1;
+ break;
+ }
+ }
+ goto dflt_1;
+
+ default:
+dflt_1:
+ /* it's a board command */
+ mb->command = chdlc_udp_pkt->cblock.command;
+ mb->buffer_length = chdlc_udp_pkt->cblock.buffer_length;
+ if (mb->buffer_length) {
+ memcpy(&mb->data, (unsigned char *) chdlc_udp_pkt->
+ data, mb->buffer_length);
+ }
+ /* run the command on the board */
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK) {
+ break;
+ }
+
+ /* copy the result back to our buffer */
+ memcpy(&chdlc_udp_pkt->cblock, mb, sizeof(cblock_t));
+
+ if (mb->buffer_length) {
+ memcpy(&chdlc_udp_pkt->data, &mb->data,
+ mb->buffer_length);
+ }
+
+ } /* end of switch */
+ } /* end of else */
+
+ /* Fill UDP TTL */
+ chdlc_udp_pkt->ip_pkt.ttl = card->wandev.ttl;
+
+ len = reply_udp(chdlc_priv_area->udp_pkt_data, mb->buffer_length);
+
+
+ if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK){
+
+ /* Must check if we interrupted if_send() routine. The
+ * tx buffers might be used. If so drop the packet */
+ if (!test_bit(SEND_CRIT,&card->wandev.critical)) {
+
+ if(!chdlc_send(card, chdlc_priv_area->udp_pkt_data, len)) {
+ ++ card->wandev.stats.tx_packets;
+ card->wandev.stats.tx_bytes += len;
+ }
+ }
+ } else {
+
+ /* Pass it up the stack
+ Allocate socket buffer */
+ if ((new_skb = dev_alloc_skb(len)) != NULL) {
+ /* copy data into new_skb */
+
+ buf = skb_put(new_skb, len);
+ memcpy(buf, chdlc_priv_area->udp_pkt_data, len);
+
+ /* Decapsulate pkt and pass it up the protocol stack */
+ new_skb->protocol = htons(ETH_P_IP);
+ new_skb->dev = dev;
+ new_skb->mac.raw = new_skb->data;
+
+ netif_rx(new_skb);
+ dev->last_rx = jiffies;
+ } else {
+
+ printk(KERN_INFO "%s: no socket buffers available!\n",
+ card->devname);
+ }
+ }
+
+ chdlc_priv_area->udp_pkt_lgth = 0;
+
+ return 0;
+}
+
+/*============================================================================
+ * Initialize Receive and Transmit Buffers.
+ */
+
+static void init_chdlc_tx_rx_buff( sdla_t* card)
+{
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ CHDLC_TX_STATUS_EL_CFG_STRUCT *tx_config;
+ CHDLC_RX_STATUS_EL_CFG_STRUCT *rx_config;
+ char err;
+
+ mb->buffer_length = 0;
+ mb->command = READ_CHDLC_CONFIGURATION;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+
+ if(err != COMMAND_OK) {
+ if (card->wandev.dev){
+ chdlc_error(card,err,mb);
+ }
+ return;
+ }
+
+ if(card->hw.type == SDLA_S514) {
+ tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
+ (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
+ ptr_CHDLC_Tx_stat_el_cfg_struct));
+ rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
+ (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
+ ptr_CHDLC_Rx_stat_el_cfg_struct));
+
+ /* Setup Head and Tails for buffers */
+ card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
+ tx_config->base_addr_Tx_status_elements);
+ card->u.c.txbuf_last =
+ (CHDLC_DATA_TX_STATUS_EL_STRUCT *)
+ card->u.c.txbuf_base +
+ (tx_config->number_Tx_status_elements - 1);
+
+ card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
+ rx_config->base_addr_Rx_status_elements);
+ card->u.c.rxbuf_last =
+ (CHDLC_DATA_RX_STATUS_EL_STRUCT *)
+ card->u.c.rxbuf_base +
+ (rx_config->number_Rx_status_elements - 1);
+
+ /* Set up next pointer to be used */
+ card->u.c.txbuf = (void *)(card->hw.dpmbase +
+ tx_config->next_Tx_status_element_to_use);
+ card->u.c.rxmb = (void *)(card->hw.dpmbase +
+ rx_config->next_Rx_status_element_to_use);
+ }
+ else {
+ tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
+ (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
+ ptr_CHDLC_Tx_stat_el_cfg_struct % SDLA_WINDOWSIZE));
+
+ rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
+ (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
+ ptr_CHDLC_Rx_stat_el_cfg_struct % SDLA_WINDOWSIZE));
+
+ /* Setup Head and Tails for buffers */
+ card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
+ (tx_config->base_addr_Tx_status_elements % SDLA_WINDOWSIZE));
+ card->u.c.txbuf_last =
+ (CHDLC_DATA_TX_STATUS_EL_STRUCT *)card->u.c.txbuf_base
+ + (tx_config->number_Tx_status_elements - 1);
+ card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
+ (rx_config->base_addr_Rx_status_elements % SDLA_WINDOWSIZE));
+ card->u.c.rxbuf_last =
+ (CHDLC_DATA_RX_STATUS_EL_STRUCT *)card->u.c.rxbuf_base
+ + (rx_config->number_Rx_status_elements - 1);
+
+ /* Set up next pointer to be used */
+ card->u.c.txbuf = (void *)(card->hw.dpmbase +
+ (tx_config->next_Tx_status_element_to_use % SDLA_WINDOWSIZE));
+ card->u.c.rxmb = (void *)(card->hw.dpmbase +
+ (rx_config->next_Rx_status_element_to_use % SDLA_WINDOWSIZE));
+ }
+
+ /* Setup Actual Buffer Start and end addresses */
+ card->u.c.rx_base = rx_config->base_addr_Rx_buffer;
+ card->u.c.rx_top = rx_config->end_addr_Rx_buffer;
+
+}
+
+/*=============================================================================
+ * Perform Interrupt Test by running READ_CHDLC_CODE_VERSION command MAX_INTR
+ * _TEST_COUNTER times.
+ */
+static int intr_test( sdla_t* card)
+{
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ int err,i;
+
+ Intr_test_counter = 0;
+
+ err = chdlc_set_intr_mode(card, APP_INT_ON_COMMAND_COMPLETE);
+
+ if (err == CMD_OK) {
+ for (i = 0; i < MAX_INTR_TEST_COUNTER; i ++) {
+ mb->buffer_length = 0;
+ mb->command = READ_CHDLC_CODE_VERSION;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != CMD_OK)
+ chdlc_error(card, err, mb);
+ }
+ }
+ else {
+ return err;
+ }
+
+ err = chdlc_set_intr_mode(card, 0);
+
+ if (err != CMD_OK)
+ return err;
+
+ return 0;
+}
+
+/*==============================================================================
+ * Determine what type of UDP call it is. CPIPEAB ?
+ */
+static int udp_pkt_type(struct sk_buff *skb, sdla_t* card)
+{
+ chdlc_udp_pkt_t *chdlc_udp_pkt = (chdlc_udp_pkt_t *)skb->data;
+
+#ifdef _WAN_UDP_DEBUG
+ printk(KERN_INFO "SIG %s = %s\n\
+ UPP %x = %x\n\
+ PRT %x = %x\n\
+ REQ %i = %i\n\
+ 36 th = %x 37th = %x\n",
+ chdlc_udp_pkt->wp_mgmt.signature,
+ UDPMGMT_SIGNATURE,
+ chdlc_udp_pkt->udp_pkt.udp_dst_port,
+ ntohs(card->wandev.udp_port),
+ chdlc_udp_pkt->ip_pkt.protocol,
+ UDPMGMT_UDP_PROTOCOL,
+ chdlc_udp_pkt->wp_mgmt.request_reply,
+ UDPMGMT_REQUEST,
+ skb->data[36], skb->data[37]);
+#endif
+
+ if (!strncmp(chdlc_udp_pkt->wp_mgmt.signature,UDPMGMT_SIGNATURE,8) &&
+ (chdlc_udp_pkt->udp_pkt.udp_dst_port == ntohs(card->wandev.udp_port)) &&
+ (chdlc_udp_pkt->ip_pkt.protocol == UDPMGMT_UDP_PROTOCOL) &&
+ (chdlc_udp_pkt->wp_mgmt.request_reply == UDPMGMT_REQUEST)) {
+
+ return UDP_CPIPE_TYPE;
+
+ }else{
+ return UDP_INVALID_TYPE;
+ }
+}
+
+/*============================================================================
+ * Set PORT state.
+ */
+static void port_set_state (sdla_t *card, int state)
+{
+ if (card->u.c.state != state)
+ {
+ switch (state)
+ {
+ case WAN_CONNECTED:
+ printk (KERN_INFO "%s: Link connected!\n",
+ card->devname);
+ break;
+
+ case WAN_CONNECTING:
+ printk (KERN_INFO "%s: Link connecting...\n",
+ card->devname);
+ break;
+
+ case WAN_DISCONNECTED:
+ printk (KERN_INFO "%s: Link disconnected!\n",
+ card->devname);
+ break;
+ }
+
+ card->wandev.state = card->u.c.state = state;
+ if (card->wandev.dev){
+ struct net_device *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area = dev->priv;
+ chdlc_priv_area->common.state = state;
+ }
+ }
+}
+
+/*===========================================================================
+ * config_chdlc
+ *
+ * Configure the chdlc protocol and enable communications.
+ *
+ * The if_open() function binds this function to the poll routine.
+ * Therefore, this function will run every time the chdlc interface
+ * is brought up. We cannot run this function from the if_open
+ * because if_open does not have access to the remote IP address.
+ *
+ * If the communications are not enabled, proceed to configure
+ * the card and enable communications.
+ *
+ * If the communications are enabled, it means that the interface
+ * was shutdown by ether the user or driver. In this case, we
+ * have to check that the IP addresses have not changed. If
+ * the IP addresses have changed, we have to reconfigure the firmware
+ * and update the changed IP addresses. Otherwise, just exit.
+ *
+ */
+
+static int config_chdlc (sdla_t *card)
+{
+ struct net_device *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area = dev->priv;
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+
+ if (card->u.c.comm_enabled){
+
+ /* Jun 20. 2000: NC
+ * IP addresses are not used in the API mode */
+
+ if ((chdlc_priv_area->ip_local_tmp != chdlc_priv_area->ip_local ||
+ chdlc_priv_area->ip_remote_tmp != chdlc_priv_area->ip_remote) &&
+ card->u.c.usedby == WANPIPE) {
+
+ /* The IP addersses have changed, we must
+ * stop the communications and reconfigure
+ * the card. Reason: the firmware must know
+ * the local and remote IP addresses. */
+ disable_comm(card);
+ port_set_state(card, WAN_DISCONNECTED);
+ printk(KERN_INFO
+ "%s: IP addresses changed!\n",
+ card->devname);
+ printk(KERN_INFO
+ "%s: Restarting communications ...\n",
+ card->devname);
+ }else{
+ /* IP addresses are the same and the link is up,
+ * we don't have to do anything here. Therefore, exit */
+ return 0;
+ }
+ }
+
+ chdlc_priv_area->ip_local = chdlc_priv_area->ip_local_tmp;
+ chdlc_priv_area->ip_remote = chdlc_priv_area->ip_remote_tmp;
+
+
+ /* Setup the Board for asynchronous mode */
+ if (card->u.c.async_mode){
+
+ if (set_asy_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC Async configuration!\n",
+ card->devname);
+ return 0;
+ }
+ }else{
+ /* Setup the Board for CHDLC */
+ if (set_chdlc_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC configuration!\n",
+ card->devname);
+ return 0;
+ }
+ }
+
+ /* Set interrupt mode and mask */
+ if (chdlc_set_intr_mode(card, APP_INT_ON_RX_FRAME |
+ APP_INT_ON_GLOBAL_EXCEP_COND |
+ APP_INT_ON_TX_FRAME |
+ APP_INT_ON_CHDLC_EXCEP_COND | APP_INT_ON_TIMER)){
+ printk (KERN_INFO "%s: Failed to set interrupt triggers!\n",
+ card->devname);
+ return 0;
+ }
+
+
+ /* Mask the Transmit and Timer interrupt */
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~(APP_INT_ON_TX_FRAME | APP_INT_ON_TIMER);
+
+ /* In TTY mode, receive interrupt will be enabled during
+ * wanpipe_tty_open() operation */
+ if (card->tty_opt){
+ flags->interrupt_info_struct.interrupt_permission &= ~APP_INT_ON_RX_FRAME;
+ }
+
+ /* Enable communications */
+ if (card->u.c.async_mode){
+ if (asy_comm_enable(card) != 0) {
+ printk(KERN_INFO "%s: Failed to enable async commnunication!\n",
+ card->devname);
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ card->u.c.comm_enabled=0;
+ chdlc_set_intr_mode(card,0);
+ return 0;
+ }
+ }else{
+ if (chdlc_comm_enable(card) != 0) {
+ printk(KERN_INFO "%s: Failed to enable chdlc communications!\n",
+ card->devname);
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ card->u.c.comm_enabled=0;
+ chdlc_set_intr_mode(card,0);
+ return 0;
+ }
+ }
+
+ /* Initialize Rx/Tx buffer control fields */
+ init_chdlc_tx_rx_buff(card);
+ port_set_state(card, WAN_CONNECTING);
+ return 0;
+}
+
+
+/*============================================================
+ * chdlc_poll
+ *
+ * Rationale:
+ * We cannot manipulate the routing tables, or
+ * ip addresses withing the interrupt. Therefore
+ * we must perform such actons outside an interrupt
+ * at a later time.
+ *
+ * Description:
+ * CHDLC polling routine, responsible for
+ * shutting down interfaces upon disconnect
+ * and adding/removing routes.
+ *
+ * Usage:
+ * This function is executed for each CHDLC
+ * interface through a tq_schedule bottom half.
+ *
+ * trigger_chdlc_poll() function is used to kick
+ * the chldc_poll routine.
+ */
+
+static void chdlc_poll(struct net_device *dev)
+{
+ chdlc_private_area_t *chdlc_priv_area;
+ sdla_t *card;
+ u8 check_gateway=0;
+ SHARED_MEMORY_INFO_STRUCT* flags;
+
+
+ if (!dev || (chdlc_priv_area=dev->priv) == NULL)
+ return;
+
+ card = chdlc_priv_area->card;
+ flags = card->u.c.flags;
+
+ /* (Re)Configuraiton is in progress, stop what you are
+ * doing and get out */
+ if (test_bit(PERI_CRIT,&card->wandev.critical)){
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+ return;
+ }
+
+ /* if_open() function has triggered the polling routine
+ * to determine the configured IP addresses. Once the
+ * addresses are found, trigger the chdlc configuration */
+ if (test_bit(0,&chdlc_priv_area->config_chdlc)){
+
+ chdlc_priv_area->ip_local_tmp = get_ip_address(dev,WAN_LOCAL_IP);
+ chdlc_priv_area->ip_remote_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP);
+
+ /* Jun 20. 2000 Bug Fix
+ * Only perform this check in WANPIPE mode, since
+ * IP addresses are not used in the API mode. */
+
+ if (chdlc_priv_area->ip_local_tmp == chdlc_priv_area->ip_remote_tmp &&
+ card->u.c.slarp_timer == 0x00 &&
+ !card->u.c.backup &&
+ card->u.c.usedby == WANPIPE){
+
+ if (++chdlc_priv_area->ip_error > MAX_IP_ERRORS){
+ printk(KERN_INFO "\n%s: --- WARNING ---\n",
+ card->devname);
+ printk(KERN_INFO
+ "%s: The local IP address is the same as the\n",
+ card->devname);
+ printk(KERN_INFO
+ "%s: Point-to-Point IP address.\n",
+ card->devname);
+ printk(KERN_INFO "%s: --- WARNING ---\n\n",
+ card->devname);
+ }else{
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+ chdlc_priv_area->poll_delay_timer.expires = jiffies+HZ;
+ add_timer(&chdlc_priv_area->poll_delay_timer);
+ return;
+ }
+ }
+
+ clear_bit(0,&chdlc_priv_area->config_chdlc);
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+
+ chdlc_priv_area->timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
+ flags->interrupt_info_struct.interrupt_permission |= APP_INT_ON_TIMER;
+ return;
+ }
+ /* Dynamic interface implementation, as well as dynamic
+ * routing. */
+
+ switch (card->u.c.state){
+
+ case WAN_DISCONNECTED:
+
+ /* If the dynamic interface configuration is on, and interface
+ * is up, then bring down the netowrk interface */
+
+ if (test_bit(DYN_OPT_ON,&chdlc_priv_area->interface_down) &&
+ !test_bit(DEV_DOWN, &chdlc_priv_area->interface_down) &&
+ card->wandev.dev->flags & IFF_UP){
+
+ printk(KERN_INFO "%s: Interface %s down.\n",
+ card->devname,card->wandev.dev->name);
+ change_dev_flags(card->wandev.dev,(card->wandev.dev->flags&~IFF_UP));
+ set_bit(DEV_DOWN,&chdlc_priv_area->interface_down);
+ chdlc_priv_area->route_status = NO_ROUTE;
+
+ }else{
+ /* We need to check if the local IP address is
+ * zero. If it is, we shouldn't try to remove it.
+ */
+
+ if (card->wandev.dev->flags & IFF_UP &&
+ get_ip_address(card->wandev.dev,WAN_LOCAL_IP) &&
+ chdlc_priv_area->route_status != NO_ROUTE &&
+ card->u.c.slarp_timer){
+
+ process_route(card);
+ }
+ }
+ break;
+
+ case WAN_CONNECTED:
+
+ /* In SMP machine this code can execute before the interface
+ * comes up. In this case, we must make sure that we do not
+ * try to bring up the interface before dev_open() is finished */
+
+
+ /* DEV_DOWN will be set only when we bring down the interface
+ * for the very first time. This way we know that it was us
+ * that brought the interface down */
+
+ if (test_bit(DYN_OPT_ON,&chdlc_priv_area->interface_down) &&
+ test_bit(DEV_DOWN, &chdlc_priv_area->interface_down) &&
+ !(card->wandev.dev->flags & IFF_UP)){
+
+ printk(KERN_INFO "%s: Interface %s up.\n",
+ card->devname,card->wandev.dev->name);
+ change_dev_flags(card->wandev.dev,(card->wandev.dev->flags|IFF_UP));
+ clear_bit(DEV_DOWN,&chdlc_priv_area->interface_down);
+ check_gateway=1;
+ }
+
+ if (chdlc_priv_area->route_status == ADD_ROUTE &&
+ card->u.c.slarp_timer){
+
+ process_route(card);
+ check_gateway=1;
+ }
+
+ if (chdlc_priv_area->gateway && check_gateway)
+ add_gateway(card,dev);
+
+ break;
+ }
+
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+}
+
+/*============================================================
+ * trigger_chdlc_poll
+ *
+ * Description:
+ * Add a chdlc_poll() work entry into the keventd work queue
+ * for a specific dlci/interface. This will kick
+ * the fr_poll() routine at a later time.
+ *
+ * Usage:
+ * Interrupts use this to defer a taks to
+ * a polling routine.
+ *
+ */
+static void trigger_chdlc_poll(struct net_device *dev)
+{
+ chdlc_private_area_t *chdlc_priv_area;
+ sdla_t *card;
+
+ if (!dev)
+ return;
+
+ if ((chdlc_priv_area = dev->priv)==NULL)
+ return;
+
+ card = chdlc_priv_area->card;
+
+ if (test_and_set_bit(POLL_CRIT,&card->wandev.critical)){
+ return;
+ }
+ if (test_bit(PERI_CRIT,&card->wandev.critical)){
+ return;
+ }
+ schedule_work(&chdlc_priv_area->poll_work);
+}
+
+
+static void chdlc_poll_delay (unsigned long dev_ptr)
+{
+ struct net_device *dev = (struct net_device *)dev_ptr;
+ trigger_chdlc_poll(dev);
+}
+
+
+void s508_lock (sdla_t *card, unsigned long *smp_flags)
+{
+ spin_lock_irqsave(&card->wandev.lock, *smp_flags);
+ if (card->next){
+ spin_lock(&card->next->wandev.lock);
+ }
+}
+
+void s508_unlock (sdla_t *card, unsigned long *smp_flags)
+{
+ if (card->next){
+ spin_unlock(&card->next->wandev.lock);
+ }
+ spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
+}
+
+//*********** TTY SECTION ****************
+
+static void wanpipe_tty_trigger_tx_irq(sdla_t *card)
+{
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+ INTERRUPT_INFORMATION_STRUCT *chdlc_int = &flags->interrupt_info_struct;
+ chdlc_int->interrupt_permission |= APP_INT_ON_TX_FRAME;
+}
+
+static void wanpipe_tty_trigger_poll(sdla_t *card)
+{
+ schedule_work(&card->tty_work);
+}
+
+static void tty_poll_work (void* data)
+{
+ sdla_t *card = (sdla_t*)data;
+ struct tty_struct *tty;
+
+ if ((tty=card->tty)==NULL)
+ return;
+
+ tty_wakeup(tty);
+#if defined(SERIAL_HAVE_POLL_WAIT)
+ wake_up_interruptible(&tty->poll_wait);
+#endif
+ return;
+}
+
+static void wanpipe_tty_close(struct tty_struct *tty, struct file * filp)
+{
+ sdla_t *card;
+ unsigned long smp_flags;
+
+ if (!tty || !tty->driver_data){
+ return;
+ }
+
+ card = (sdla_t*)tty->driver_data;
+
+ if (!card)
+ return;
+
+ printk(KERN_INFO "%s: Closing TTY Driver!\n",
+ card->devname);
+
+ /* Sanity Check */
+ if (!card->tty_open)
+ return;
+
+ wanpipe_close(card);
+ if (--card->tty_open == 0){
+
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ card->tty=NULL;
+ chdlc_disable_comm_shutdown(card);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+
+ if (card->tty_buf){
+ kfree(card->tty_buf);
+ card->tty_buf=NULL;
+ }
+
+ if (card->tty_rx){
+ kfree(card->tty_rx);
+ card->tty_rx=NULL;
+ }
+ }
+ return;
+}
+static int wanpipe_tty_open(struct tty_struct *tty, struct file * filp)
+{
+ unsigned long smp_flags;
+ sdla_t *card;
+
+ if (!tty){
+ return -ENODEV;
+ }
+
+ if (!tty->driver_data){
+ int port;
+ port = tty->index;
+ if ((port < 0) || (port >= NR_PORTS))
+ return -ENODEV;
+
+ tty->driver_data = WAN_CARD(port);
+ if (!tty->driver_data)
+ return -ENODEV;
+ }
+
+ card = (sdla_t*)tty->driver_data;
+
+ if (!card){
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ card->tty=NULL;
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ return -ENODEV;
+ }
+
+ printk(KERN_INFO "%s: Opening TTY Driver!\n",
+ card->devname);
+
+ if (card->tty_open == 0){
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ card->tty=tty;
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+
+ if (!card->tty_buf){
+ card->tty_buf = kmalloc(TTY_CHDLC_MAX_MTU, GFP_KERNEL);
+ if (!card->tty_buf){
+ card->tty_buf=NULL;
+ card->tty=NULL;
+ return -ENOMEM;
+ }
+ }
+
+ if (!card->tty_rx){
+ card->tty_rx = kmalloc(TTY_CHDLC_MAX_MTU, GFP_KERNEL);
+ if (!card->tty_rx){
+ /* Free the buffer above */
+ kfree(card->tty_buf);
+ card->tty_buf=NULL;
+ card->tty=NULL;
+ return -ENOMEM;
+ }
+ }
+ }
+
+ ++card->tty_open;
+ wanpipe_open(card);
+ return 0;
+}
+
+static int wanpipe_tty_write(struct tty_struct * tty, const unsigned char *buf, int count)
+{
+ unsigned long smp_flags=0;
+ sdla_t *card=NULL;
+
+ if (!tty){
+ dbg_printk(KERN_INFO "NO TTY in Write\n");
+ return -ENODEV;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+
+ if (!card){
+ dbg_printk(KERN_INFO "No Card in TTY Write\n");
+ return -ENODEV;
+ }
+
+ if (count > card->wandev.mtu){
+ dbg_printk(KERN_INFO "Frame too big in Write %i Max: %i\n",
+ count,card->wandev.mtu);
+ return -EINVAL;
+ }
+
+ if (card->wandev.state != WAN_CONNECTED){
+ dbg_printk(KERN_INFO "Card not connected in TTY Write\n");
+ return -EINVAL;
+ }
+
+ /* Lock the 508 Card: SMP is supported */
+ if(card->hw.type != SDLA_S514){
+ s508_lock(card,&smp_flags);
+ }
+
+ if (test_and_set_bit(SEND_CRIT,(void*)&card->wandev.critical)){
+ printk(KERN_INFO "%s: Critical in TTY Write\n",
+ card->devname);
+
+ /* Lock the 508 Card: SMP is supported */
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return -EINVAL;
+ }
+
+ if (chdlc_send(card,(void*)buf,count)){
+ dbg_printk(KERN_INFO "%s: Failed to send, retry later: kernel!\n",
+ card->devname);
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ wanpipe_tty_trigger_tx_irq(card);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+ return 0;
+ }
+ dbg_printk(KERN_INFO "%s: Packet sent OK: %i\n",card->devname,count);
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return count;
+}
+
+static void wanpipe_tty_receive(sdla_t *card, unsigned addr, unsigned int len)
+{
+ unsigned offset=0;
+ unsigned olen=len;
+ char fp=0;
+ struct tty_struct *tty;
+ int i;
+ struct tty_ldisc *ld;
+
+ if (!card->tty_open){
+ dbg_printk(KERN_INFO "%s: TTY not open during receive\n",
+ card->devname);
+ return;
+ }
+
+ if ((tty=card->tty) == NULL){
+ dbg_printk(KERN_INFO "%s: No TTY on receive\n",
+ card->devname);
+ return;
+ }
+
+ if (!tty->driver_data){
+ dbg_printk(KERN_INFO "%s: No Driver Data, or Flip on receive\n",
+ card->devname);
+ return;
+ }
+
+
+ if (card->u.c.async_mode){
+ if ((tty->flip.count+len) >= TTY_FLIPBUF_SIZE){
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: Received packet size too big: %i bytes, Max: %i!\n",
+ card->devname,len,TTY_FLIPBUF_SIZE);
+ }
+ return;
+ }
+
+
+ if((addr + len) > card->u.c.rx_top + 1) {
+ offset = card->u.c.rx_top - addr + 1;
+
+ sdla_peek(&card->hw, addr, tty->flip.char_buf_ptr, offset);
+
+ addr = card->u.c.rx_base;
+ len -= offset;
+
+ tty->flip.char_buf_ptr+=offset;
+ tty->flip.count+=offset;
+ for (i=0;i<offset;i++){
+ *tty->flip.flag_buf_ptr = 0;
+ tty->flip.flag_buf_ptr++;
+ }
+ }
+
+ sdla_peek(&card->hw, addr, tty->flip.char_buf_ptr, len);
+
+ tty->flip.char_buf_ptr+=len;
+ card->tty->flip.count+=len;
+ for (i=0;i<len;i++){
+ *tty->flip.flag_buf_ptr = 0;
+ tty->flip.flag_buf_ptr++;
+ }
+
+ tty->low_latency=1;
+ tty_flip_buffer_push(tty);
+ }else{
+ if (!card->tty_rx){
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: Receive sync buffer not available!\n",
+ card->devname);
+ }
+ return;
+ }
+
+ if (len > TTY_CHDLC_MAX_MTU){
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: Received packet size too big: %i bytes, Max: %i!\n",
+ card->devname,len,TTY_FLIPBUF_SIZE);
+ }
+ return;
+ }
+
+
+ if((addr + len) > card->u.c.rx_top + 1) {
+ offset = card->u.c.rx_top - addr + 1;
+
+ sdla_peek(&card->hw, addr, card->tty_rx, offset);
+
+ addr = card->u.c.rx_base;
+ len -= offset;
+ }
+ sdla_peek(&card->hw, addr, card->tty_rx+offset, len);
+ ld = tty_ldisc_ref(tty);
+ if (ld) {
+ if (ld->receive_buf)
+ ld->receive_buf(tty,card->tty_rx,&fp,olen);
+ tty_ldisc_deref(ld);
+ }else{
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: NO TTY Sync line discipline!\n",
+ card->devname);
+ }
+ }
+ }
+
+ dbg_printk(KERN_INFO "%s: Received Data %i\n",card->devname,olen);
+ return;
+}
+
+#if 0
+static int wanpipe_tty_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ return -ENOIOCTLCMD;
+}
+#endif
+
+static void wanpipe_tty_stop(struct tty_struct *tty)
+{
+ return;
+}
+
+static void wanpipe_tty_start(struct tty_struct *tty)
+{
+ return;
+}
+
+static int config_tty (sdla_t *card)
+{
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+
+ /* Setup the Board for asynchronous mode */
+ if (card->u.c.async_mode){
+
+ if (set_asy_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC Async configuration!\n",
+ card->devname);
+ return -EINVAL;
+ }
+ }else{
+ /* Setup the Board for CHDLC */
+ if (set_chdlc_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC configuration!\n",
+ card->devname);
+ return -EINVAL;
+ }
+ }
+
+ /* Set interrupt mode and mask */
+ if (chdlc_set_intr_mode(card, APP_INT_ON_RX_FRAME |
+ APP_INT_ON_GLOBAL_EXCEP_COND |
+ APP_INT_ON_TX_FRAME |
+ APP_INT_ON_CHDLC_EXCEP_COND | APP_INT_ON_TIMER)){
+ printk (KERN_INFO "%s: Failed to set interrupt triggers!\n",
+ card->devname);
+ return -EINVAL;
+ }
+
+
+ /* Mask the Transmit and Timer interrupt */
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~(APP_INT_ON_TX_FRAME | APP_INT_ON_TIMER);
+
+
+ /* Enable communications */
+ if (card->u.c.async_mode){
+ if (asy_comm_enable(card) != 0) {
+ printk(KERN_INFO "%s: Failed to enable async commnunication!\n",
+ card->devname);
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ card->u.c.comm_enabled=0;
+ chdlc_set_intr_mode(card,0);
+ return -EINVAL;
+ }
+ }else{
+ if (chdlc_comm_enable(card) != 0) {
+ printk(KERN_INFO "%s: Failed to enable chdlc communications!\n",
+ card->devname);
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ card->u.c.comm_enabled=0;
+ chdlc_set_intr_mode(card,0);
+ return -EINVAL;
+ }
+ }
+
+ /* Initialize Rx/Tx buffer control fields */
+ init_chdlc_tx_rx_buff(card);
+ port_set_state(card, WAN_CONNECTING);
+ return 0;
+}
+
+
+static int change_speed(sdla_t *card, struct tty_struct *tty,
+ struct termios *old_termios)
+{
+ int baud, ret=0;
+ unsigned cflag;
+ int dbits,sbits,parity,handshaking;
+
+ cflag = tty->termios->c_cflag;
+
+ /* There is always one stop bit */
+ sbits=WANOPT_ONE;
+
+ /* Parity is defaulted to NONE */
+ parity = WANOPT_NONE;
+
+ handshaking=0;
+
+ /* byte size and parity */
+ switch (cflag & CSIZE) {
+ case CS5: dbits = 5; break;
+ case CS6: dbits = 6; break;
+ case CS7: dbits = 7; break;
+ case CS8: dbits = 8; break;
+ /* Never happens, but GCC is too dumb to figure it out */
+ default: dbits = 8; break;
+ }
+
+ /* One more stop bit should be supported, thus increment
+ * the number of stop bits Max=2 */
+ if (cflag & CSTOPB) {
+ sbits = WANOPT_TWO;
+ }
+ if (cflag & PARENB) {
+ parity = WANOPT_EVEN;
+ }
+ if (cflag & PARODD){
+ parity = WANOPT_ODD;
+ }
+
+ /* Determine divisor based on baud rate */
+ baud = tty_get_baud_rate(tty);
+
+ if (!baud)
+ baud = 9600; /* B0 transition handled in rs_set_termios */
+
+ if (cflag & CRTSCTS) {
+ handshaking|=ASY_RTS_HS_FOR_RX;
+ }
+
+ if (I_IGNPAR(tty))
+ parity = WANOPT_NONE;
+
+ if (I_IXOFF(tty)){
+ handshaking|=ASY_XON_XOFF_HS_FOR_RX;
+ handshaking|=ASY_XON_XOFF_HS_FOR_TX;
+ }
+
+ if (I_IXON(tty)){
+ handshaking|=ASY_XON_XOFF_HS_FOR_RX;
+ handshaking|=ASY_XON_XOFF_HS_FOR_TX;
+ }
+
+ if (card->u.c.async_mode){
+ if (card->wandev.bps != baud)
+ ret=1;
+ card->wandev.bps = baud;
+ }
+
+ if (card->u.c.async_mode){
+ if (card->u.c.protocol_options != handshaking)
+ ret=1;
+ card->u.c.protocol_options = handshaking;
+
+ if (card->u.c.tx_bits_per_char != dbits)
+ ret=1;
+ card->u.c.tx_bits_per_char = dbits;
+
+ if (card->u.c.rx_bits_per_char != dbits)
+ ret=1;
+ card->u.c.rx_bits_per_char = dbits;
+
+ if (card->u.c.stop_bits != sbits)
+ ret=1;
+ card->u.c.stop_bits = sbits;
+
+ if (card->u.c.parity != parity)
+ ret=1;
+ card->u.c.parity = parity;
+
+ card->u.c.break_timer = 50;
+ card->u.c.inter_char_timer = 10;
+ card->u.c.rx_complete_length = 100;
+ card->u.c.xon_char = 0xFE;
+ }else{
+ card->u.c.protocol_options = HDLC_STREAMING_MODE;
+ }
+
+ return ret;
+}
+
+
+static void wanpipe_tty_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+ sdla_t *card;
+ int err=1;
+
+ if (!tty){
+ return;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+
+ if (!card)
+ return;
+
+ if (change_speed(card, tty, old_termios) || !card->u.c.comm_enabled){
+ unsigned long smp_flags;
+
+ if (card->u.c.comm_enabled){
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ chdlc_disable_comm_shutdown(card);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ }
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ err = config_tty(card);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ if (card->u.c.async_mode){
+ printk(KERN_INFO "%s: TTY Async Configuration:\n"
+ " Baud =%i\n"
+ " Handshaking =%s\n"
+ " Tx Dbits =%i\n"
+ " Rx Dbits =%i\n"
+ " Parity =%s\n"
+ " Stop Bits =%i\n",
+ card->devname,
+ card->wandev.bps,
+ opt_decode[card->u.c.protocol_options],
+ card->u.c.tx_bits_per_char,
+ card->u.c.rx_bits_per_char,
+ p_decode[card->u.c.parity] ,
+ card->u.c.stop_bits);
+ }else{
+ printk(KERN_INFO "%s: TTY Sync Configuration:\n"
+ " Baud =%i\n"
+ " Protocol =HDLC_STREAMING\n",
+ card->devname,card->wandev.bps);
+ }
+ if (!err){
+ port_set_state(card,WAN_CONNECTED);
+ }else{
+ port_set_state(card,WAN_DISCONNECTED);
+ }
+ }
+ return;
+}
+
+static void wanpipe_tty_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ sdla_t *card;
+ unsigned long smp_flags=0;
+
+ if (!tty){
+ return;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+
+ if (!card)
+ return;
+
+ if (card->wandev.state != WAN_CONNECTED)
+ return;
+
+ if(card->hw.type != SDLA_S514)
+ s508_lock(card,&smp_flags);
+
+ if (test_and_set_bit(SEND_CRIT,(void*)&card->wandev.critical)){
+
+ wanpipe_tty_trigger_tx_irq(card);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+ return;
+ }
+
+ if (chdlc_send(card,(void*)&ch,1)){
+ wanpipe_tty_trigger_tx_irq(card);
+ dbg_printk("%s: Failed to TX char!\n",card->devname);
+ }
+
+ dbg_printk("%s: Char TX OK\n",card->devname);
+
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return;
+}
+
+static void wanpipe_tty_flush_chars(struct tty_struct *tty)
+{
+ return;
+}
+
+static void wanpipe_tty_flush_buffer(struct tty_struct *tty)
+{
+ if (!tty)
+ return;
+
+#if defined(SERIAL_HAVE_POLL_WAIT)
+ wake_up_interruptible(&tty->poll_wait);
+#endif
+ tty_wakeup(tty);
+ return;
+}
+
+/*
+ * This function is used to send a high-priority XON/XOFF character to
+ * the device
+ */
+static void wanpipe_tty_send_xchar(struct tty_struct *tty, char ch)
+{
+ return;
+}
+
+
+static int wanpipe_tty_chars_in_buffer(struct tty_struct *tty)
+{
+ return 0;
+}
+
+
+static int wanpipe_tty_write_room(struct tty_struct *tty)
+{
+ sdla_t *card;
+
+ printk(KERN_INFO "TTY Write Room\n");
+
+ if (!tty){
+ return 0;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+ if (!card)
+ return 0;
+
+ if (card->wandev.state != WAN_CONNECTED)
+ return 0;
+
+ return SEC_MAX_NO_DATA_BYTES_IN_FRAME;
+}
+
+
+static int set_modem_status(sdla_t *card, unsigned char data)
+{
+ CHDLC_MAILBOX_STRUCT *mb = card->mbox;
+ int err;
+
+ mb->buffer_length=1;
+ mb->command=SET_MODEM_STATUS;
+ mb->data[0]=data;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error (card, err, mb);
+
+ return err;
+}
+
+static void wanpipe_tty_hangup(struct tty_struct *tty)
+{
+ sdla_t *card;
+ unsigned long smp_flags;
+
+ printk(KERN_INFO "TTY Hangup!\n");
+
+ if (!tty){
+ return;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+ if (!card)
+ return;
+
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ set_modem_status(card,0);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ return;
+}
+
+static void wanpipe_tty_break(struct tty_struct *tty, int break_state)
+{
+ return;
+}
+
+static void wanpipe_tty_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ return;
+}
+
+static void wanpipe_tty_throttle(struct tty_struct * tty)
+{
+ return;
+}
+
+static void wanpipe_tty_unthrottle(struct tty_struct * tty)
+{
+ return;
+}
+
+int wanpipe_tty_read_proc(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
+{
+ return 0;
+}
+
+/*
+ * The serial driver boot-time initialization code!
+ */
+int wanpipe_tty_init(sdla_t *card)
+{
+ struct serial_state * state;
+
+ /* Initialize the tty_driver structure */
+
+ if (card->tty_minor < 0 || card->tty_minor > NR_PORTS){
+ printk(KERN_INFO "%s: Illegal Minor TTY number (0-4): %i\n",
+ card->devname,card->tty_minor);
+ return -EINVAL;
+ }
+
+ if (WAN_CARD(card->tty_minor)){
+ printk(KERN_INFO "%s: TTY Minor %i, already in use\n",
+ card->devname,card->tty_minor);
+ return -EBUSY;
+ }
+
+ if (tty_init_cnt==0){
+
+ printk(KERN_INFO "%s: TTY %s Driver Init: Major %i, Minor Range %i-%i\n",
+ card->devname,
+ card->u.c.async_mode ? "ASYNC" : "SYNC",
+ WAN_TTY_MAJOR,MIN_PORT,MAX_PORT);
+
+ tty_driver_mode = card->u.c.async_mode;
+
+ memset(&serial_driver, 0, sizeof(struct tty_driver));
+ serial_driver.magic = TTY_DRIVER_MAGIC;
+ serial_driver.owner = THIS_MODULE;
+ serial_driver.driver_name = "wanpipe_tty";
+ serial_driver.name = "ttyW";
+ serial_driver.major = WAN_TTY_MAJOR;
+ serial_driver.minor_start = WAN_TTY_MINOR;
+ serial_driver.num = NR_PORTS;
+ serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
+ serial_driver.subtype = SERIAL_TYPE_NORMAL;
+
+ serial_driver.init_termios = tty_std_termios;
+ serial_driver.init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ serial_driver.flags = TTY_DRIVER_REAL_RAW;
+
+ serial_driver.refcount = 1; /* !@!@^#^&!! */
+
+ serial_driver.open = wanpipe_tty_open;
+ serial_driver.close = wanpipe_tty_close;
+ serial_driver.write = wanpipe_tty_write;
+
+ serial_driver.put_char = wanpipe_tty_put_char;
+ serial_driver.flush_chars = wanpipe_tty_flush_chars;
+ serial_driver.write_room = wanpipe_tty_write_room;
+ serial_driver.chars_in_buffer = wanpipe_tty_chars_in_buffer;
+ serial_driver.flush_buffer = wanpipe_tty_flush_buffer;
+ //serial_driver.ioctl = wanpipe_tty_ioctl;
+ serial_driver.throttle = wanpipe_tty_throttle;
+ serial_driver.unthrottle = wanpipe_tty_unthrottle;
+ serial_driver.send_xchar = wanpipe_tty_send_xchar;
+ serial_driver.set_termios = wanpipe_tty_set_termios;
+ serial_driver.stop = wanpipe_tty_stop;
+ serial_driver.start = wanpipe_tty_start;
+ serial_driver.hangup = wanpipe_tty_hangup;
+ serial_driver.break_ctl = wanpipe_tty_break;
+ serial_driver.wait_until_sent = wanpipe_tty_wait_until_sent;
+ serial_driver.read_proc = wanpipe_tty_read_proc;
+
+ if (tty_register_driver(&serial_driver)){
+ printk(KERN_INFO "%s: Failed to register serial driver!\n",
+ card->devname);
+ }
+ }
+
+
+ /* The subsequent ports must comply to the initial configuration */
+ if (tty_driver_mode != card->u.c.async_mode){
+ printk(KERN_INFO "%s: Error: TTY Driver operation mode mismatch!\n",
+ card->devname);
+ printk(KERN_INFO "%s: The TTY driver is configured for %s!\n",
+ card->devname, tty_driver_mode ? "ASYNC" : "SYNC");
+ return -EINVAL;
+ }
+
+ tty_init_cnt++;
+
+ printk(KERN_INFO "%s: Initializing TTY %s Driver Minor %i\n",
+ card->devname,
+ tty_driver_mode ? "ASYNC" : "SYNC",
+ card->tty_minor);
+
+ tty_card_map[card->tty_minor] = card;
+ state = &rs_table[card->tty_minor];
+
+ state->magic = SSTATE_MAGIC;
+ state->line = 0;
+ state->type = PORT_UNKNOWN;
+ state->custom_divisor = 0;
+ state->close_delay = 5*HZ/10;
+ state->closing_wait = 30*HZ;
+ state->icount.cts = state->icount.dsr =
+ state->icount.rng = state->icount.dcd = 0;
+ state->icount.rx = state->icount.tx = 0;
+ state->icount.frame = state->icount.parity = 0;
+ state->icount.overrun = state->icount.brk = 0;
+ state->irq = card->wandev.irq;
+
+ INIT_WORK(&card->tty_work, tty_poll_work, (void*)card);
+ return 0;
+}
+
+
+MODULE_LICENSE("GPL");
+
+/****** End ****************************************************************/