Linux/Unix编程

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Unix_Linux

sdla_chdlc.c：源码内容

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 changen",
card->devname);
switch(mbox->data[0] & (DCD_HIGH | CTS_HIGH)) {
case (DCD_HIGH):
printk(KERN_INFO "%s: DCD high, CTS lown",card->devname);
break;
case (CTS_HIGH):
printk(KERN_INFO "%s: DCD low, CTS highn",card->devname);
break;
case ((DCD_HIGH | CTS_HIGH)):
printk(KERN_INFO "%s: DCD high, CTS highn",card->devname);
break;
default:
printk(KERN_INFO "%s: DCD low, CTS lown",card->devname);
break;
}
break;
case EXCEP_TRC_DISABLED:
printk(KERN_INFO "%s: Line trace disabledn",
card->devname);
break;
case EXCEP_IRQ_TIMEOUT:
printk(KERN_INFO "%s: IRQ timeout occurredn",
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 %xn",
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)
{
netdevice_t *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)
{
netdevice_t *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)
{
netdevice_t *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;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
struct in_device *in_dev;
mm_segment_t fs;
struct ifreq if_info;
struct sockaddr_in *if_data1, *if_data2;
#else
unsigned long fs = 0;
struct rtentry route;
#endif
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 receivedn",
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 issuedn",
card->devname,
NIPQUAD(addr_net));
printk(KERN_INFO "%s: to remote station. Localn",
card->devname);
printk(KERN_INFO "%s: IP address must be A.B.C.1n",
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;
}
#if defined(LINUX_2_1) || defined(LINUX_2_4)
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
local_IP_addr = dev->pa_addr;
remote_IP_addr = dev->pa_dstaddr;
IP_netmask = dev->pa_mask;
#endif
}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 */
#if defined(LINUX_2_1) || defined(LINUX_2_4)
/* Setup a structure for adding/removing routes */
memset(&if_info, 0, sizeof(if_info));
strcpy(if_info.ifr_name, dev->name);
#else
/* Setup a structure for adding/removing routes */
dev->pa_mask = IP_netmask;
dev->pa_dstaddr = remote_IP_addr;
dev->pa_addr = local_IP_addr;
memset(&route, 0, sizeof(route));
route.rt_dev = dev->name;
route.rt_flags = 0;
((struct sockaddr_in *)&(route.rt_dst))->sin_addr.s_addr =
dev->pa_dstaddr;
((struct sockaddr_in *)&(route.rt_dst))->sin_family = AF_INET;
((struct sockaddr_in *)&(route.rt_genmask))->sin_addr.s_addr =
0xFFFFFFFF;
((struct sockaddr_in *)&(route.rt_genmask))->sin_family =
AF_INET;
#endif
switch (chdlc_priv_area->route_status) {
case ADD_ROUTE:
if(!card->u.c.slarp_timer) {
#if defined(LINUX_2_1) || defined(LINUX_2_4)
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
err = ip_rt_new(&route);
#endif
} else {
#if defined(LINUX_2_1) || defined(LINUX_2_4)
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);
}
#else
err = ip_rt_new(&route);
#endif
}
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.%un",
card->devname, NIPQUAD(local_IP_addr));
printk(KERN_INFO "%s: Remote IP addr: %u.%u.%u.%un",
card->devname, NIPQUAD(remote_IP_addr));
chdlc_priv_area->route_removed = 0;
}
break;
case REMOVE_ROUTE:
#if defined(LINUX_2_1) || defined(LINUX_2_4)
/* 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);
}
#else
/* set the point-to-point IP address to 0.0.0.0 */
dev->pa_dstaddr = 0;
err = ip_rt_kill(&route);
#endif
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.%un",
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, netdevice_t* 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){
wan_dev_kfree_skb(skb, FREE_WRITE);
}else{
wan_dev_kfree_skb(skb, FREE_READ);
}
return(udp_pkt_stored);
}
/*=============================================================================
* Process UDP management packet.
*/
static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* 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: %xn",
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;
#if defined(LINUX_2_1) || defined(LINUX_2_4)
card->wandev.stats.tx_bytes += len;
#endif
}
}
} 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);
} 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 = %sn
UPP %x = %xn
PRT %x = %xn
REQ %i = %in
36 th = %x 37th = %xn",
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){
netdevice_t *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)
{
netdevice_t *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 dont 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 (netdevice_t *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 then",
card->devname);
printk(KERN_INFO
"%s: Point-to-Point IP address.n",
card->devname);
printk(KERN_INFO "%s: --- WARNING ---nn",
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() task into a tq_scheduler bh handler
* 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 (netdevice_t *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;
}
#ifdef LINUX_2_4
schedule_task(&chdlc_priv_area->poll_task);
#else
queue_task(&chdlc_priv_area->poll_task, &tq_scheduler);
#endif
return;
}
static void chdlc_poll_delay (unsigned long dev_ptr)
{
netdevice_t *dev = (netdevice_t *)dev_ptr;
trigger_chdlc_poll(dev);
}
void s508_lock (sdla_t *card, unsigned long *smp_flags)
{
#if defined(__SMP__) || defined(LINUX_2_4)
spin_lock_irqsave(&card->wandev.lock, *smp_flags);
if (card->next){
spin_lock(&card->next->wandev.lock);
}
#else
disable_irq(card->hw.irq);
#endif
}
void s508_unlock (sdla_t *card, unsigned long *smp_flags)
{
#if defined(__SMP__) || defined(LINUX_2_4)
if (card->next){
spin_unlock(&card->next->wandev.lock);
}
spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
#else
enable_irq(card->hw.irq);
#endif
}
//*********** TTY SECTION ****************
#if defined(LINUX_2_4) || defined(LINUX_2_1)
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)
{
#ifdef LINUX_2_4
schedule_task(&card->tty_task_queue);
#else
queue_task(&card->tty_task_queue, &tq_scheduler);
#endif
}
static void tty_poll_task (void* data)
{
sdla_t *card = (sdla_t*)data;
struct tty_struct *tty;
if ((tty=card->tty)==NULL)
return;
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
tty->ldisc.write_wakeup){
(tty->ldisc.write_wakeup)(tty);
}
wake_up_interruptible(&tty->write_wait);
#if defined(SERIAL_HAVE_POLL_WAIT) ||
(defined LINUX_2_1 && LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15))
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 = MINOR(tty->device) - tty->driver.minor_start;
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, int from_user,
const unsigned char *buf, int count)
{
unsigned long smp_flags=0;
sdla_t *card=NULL;
if (!tty){
dbg_printk(KERN_INFO "NO TTY in Writen");
return -ENODEV;
}
card = (sdla_t *)tty->driver_data;
if (!card){
dbg_printk(KERN_INFO "No Card in TTY Writen");
return -ENODEV;
}
if (count > card->wandev.mtu){
dbg_printk(KERN_INFO "Frame too big in Write %i Max: %in",
count,card->wandev.mtu);
return -EINVAL;
}
if (card->wandev.state != WAN_CONNECTED){
dbg_printk(KERN_INFO "Card not connected in TTY Writen");
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 Writen",
card->devname);
/* Lock the 508 Card: SMP is supported */
if(card->hw.type != SDLA_S514)
s508_unlock(card,&smp_flags);
return -EINVAL;
}
if (from_user) {
unsigned char *tmp_buf;
if ((tmp_buf=card->tty_buf)==NULL){
dbg_printk(KERN_INFO "No TTY BUF in Writen");
clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
if(card->hw.type != SDLA_S514)
s508_unlock(card,&smp_flags);
return -ENOMEM;
}
if (copy_from_user(tmp_buf,buf,count)){
dbg_printk(KERN_INFO "%s: Failed to copy from user!n",
card->devname);
clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
if(card->hw.type != SDLA_S514)
s508_unlock(card,&smp_flags);
return -EINVAL;
}
if (chdlc_send(card,(void*)tmp_buf,count)){
dbg_printk(KERN_INFO "%s: Failed to send, retry later: user!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;
}
}else{
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: %in",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;
if (!card->tty_open){
dbg_printk(KERN_INFO "%s: TTY not open during receiven",
card->devname);
return;
}
if ((tty=card->tty) == NULL){
dbg_printk(KERN_INFO "%s: No TTY on receiven",
card->devname);
return;
}
if (!tty->driver_data){
dbg_printk(KERN_INFO "%s: No Driver Data, or Flip on receiven",
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);
if (tty->ldisc.receive_buf){
tty->ldisc.receive_buf(tty,card->tty_rx,&fp,olen);
}else{
if (net_ratelimit()){
printk(KERN_INFO
"%s: NO TTY Sync line discipline!n",
card->devname);
}
}
}
dbg_printk(KERN_INFO "%s: Received Data %in",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 =%in"
" Handshaking =%sn"
" Tx Dbits =%in"
" Rx Dbits =%in"
" Parity =%sn"
" Stop Bits =%in",
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 =%in"
" Protocol =HDLC_STREAMINGn",
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 OKn",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;
wake_up_interruptible(&tty->write_wait);
#if defined(SERIAL_HAVE_POLL_WAIT) ||
(defined LINUX_2_1 && LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15))
wake_up_interruptible(&tty->poll_wait);
#endif
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
tty->ldisc.write_wakeup)
(tty->ldisc.write_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 Roomn");
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): %in",
card->devname,card->tty_minor);
return -EINVAL;
}
if (WAN_CARD(card->tty_minor)){
printk(KERN_INFO "%s: TTY Minor %i, already in usen",
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-%in",
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.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 = &serial_refcount;
serial_driver.table = serial_table;
serial_driver.termios = serial_termios;
serial_driver.termios_locked = serial_termios_locked;
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;
/*
* The callout device is just like normal device except for
* major number and the subtype code.
*/
callout_driver = serial_driver;
callout_driver.name = "cuw";
callout_driver.major = TTYAUX_MAJOR;
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
callout_driver.read_proc = 0;
callout_driver.proc_entry = 0;
if (tty_register_driver(&serial_driver)){
printk(KERN_INFO "%s: Failed to register serial driver!n",
card->devname);
}
if (tty_register_driver(&callout_driver)){
printk(KERN_INFO "%s: Failed to register callout 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 %in",
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->callout_termios = callout_driver.init_termios;
state->normal_termios = serial_driver.init_termios;
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;
card->tty_task_queue.routine = tty_poll_task;
card->tty_task_queue.data = (void*)card;
return 0;
}
#endif
MODULE_LICENSE("GPL");
/****** End ****************************************************************/