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isicom.c
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isicom.c
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/*
* 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.
*
* Original driver code supplied by Multi-Tech
*
* Changes
* 1/9/98 [email protected] Merge to 2.0.x kernel tree
* Obtain and use official major/minors
* Loader switched to a misc device
* (fixed range check bug as a side effect)
* Printk clean up
* 9/12/98 [email protected] Rough port to 2.1.x
*
* 10/6/99 sameer Merged the ISA and PCI drivers to
* a new unified driver.
*
* 3/9/99 sameer Added support for ISI4616 cards.
*
* 16/9/99 sameer We do not force RTS low anymore.
* This is to prevent the firmware
* from getting confused.
*
* 26/10/99 sameer Cosmetic changes:The driver now
* dumps the Port Count information
* along with I/O address and IRQ.
*
* 13/12/99 sameer Fixed the problem with IRQ sharing.
*
* 10/5/00 sameer Fixed isicom_shutdown_board()
* to not lower DTR on all the ports
* when the last port on the card is
* closed.
*
* 10/5/00 sameer Signal mask setup command added
* to isicom_setup_port and
* isicom_shutdown_port.
*
* 24/5/00 sameer The driver is now SMP aware.
*
*
* 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
*
*
* 03/01/01 anil .s Added support for resetting the
* internal modems on ISI cards.
*
* 08/02/01 anil .s Upgraded the driver for kernel
* 2.4.x
*
* 11/04/01 Kevin Fixed firmware load problem with
* ISIHP-4X card
*
* 30/04/01 anil .s Fixed the remote login through
* ISI port problem. Now the link
* does not go down before password
* prompt.
*
* 03/05/01 anil .s Fixed the problem with IRQ sharing
* among ISI-PCI cards.
*
* 03/05/01 anil .s Added support to display the version
* info during insmod as well as module
* listing by lsmod.
*
* 10/05/01 anil .s Done the modifications to the source
* file and Install script so that the
* same installation can be used for
* 2.2.x and 2.4.x kernel.
*
* 06/06/01 anil .s Now we drop both dtr and rts during
* shutdown_port as well as raise them
* during isicom_config_port.
*
* 09/06/01 [email protected] use capable, not suser, do
* restore_flags on failure in
* isicom_send_break, verify put_user
* result
*
* 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
* Baud index extended to 21
*
* 20/03/03 ranjeeth Made to work for Linux Advanced server.
* Taken care of license warning.
*
* 10/12/03 Ravindra Made to work for Fedora Core 1 of
* Red Hat Distribution
*
* 06/01/05 Alan Cox Merged the ISI and base kernel strands
* into a single 2.6 driver
*
* ***********************************************************
*
* To use this driver you also need the support package. You
* can find this in RPM format on
* ftp://ftp.linux.org.uk/pub/linux/alan
*
* You can find the original tools for this direct from Multitech
* ftp://ftp.multitech.com/ISI-Cards/
*
* Having installed the cards the module options (/etc/modprobe.conf)
*
* options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
*
* Omit those entries for boards you don't have installed.
*
* TODO
* Hotplug
* Merge testing
* 64-bit verification
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/termios.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/serial.h>
#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
#include <linux/pci.h>
#include <linux/isicom.h>
static struct pci_device_id isicom_pci_tbl[] = {
{ VENDOR_ID, 0x2028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2052, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2054, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ VENDOR_ID, 0x2058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
static int prev_card = 3; /* start servicing isi_card[0] */
static struct tty_driver *isicom_normal;
static struct timer_list tx;
static char re_schedule = 1;
#ifdef ISICOM_DEBUG
static unsigned long tx_count = 0;
#endif
static int ISILoad_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
static void isicom_tx(unsigned long _data);
static void isicom_start(struct tty_struct * tty);
static unsigned char * tmp_buf;
static DECLARE_MUTEX(tmp_buf_sem);
/* baud index mappings from linux defns to isi */
static signed char linuxb_to_isib[] = {
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17,
18, 19
};
struct isi_board {
unsigned short base;
unsigned char irq;
unsigned char port_count;
unsigned short status;
unsigned short port_status; /* each bit represents a single port */
unsigned short shift_count;
struct isi_port * ports;
signed char count;
unsigned char isa;
spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
unsigned long flags;
};
struct isi_port {
unsigned short magic;
unsigned int flags;
int count;
int blocked_open;
int close_delay;
unsigned short channel;
unsigned short status;
unsigned short closing_wait;
struct isi_board * card;
struct tty_struct * tty;
wait_queue_head_t close_wait;
wait_queue_head_t open_wait;
struct work_struct hangup_tq;
struct work_struct bh_tqueue;
unsigned char * xmit_buf;
int xmit_head;
int xmit_tail;
int xmit_cnt;
};
static struct isi_board isi_card[BOARD_COUNT];
static struct isi_port isi_ports[PORT_COUNT];
/*
* Locking functions for card level locking. We need to own both
* the kernel lock for the card and have the card in a position that
* it wants to talk.
*/
static int lock_card(struct isi_board *card)
{
char retries;
unsigned short base = card->base;
for (retries = 0; retries < 100; retries++) {
spin_lock_irqsave(&card->card_lock, card->flags);
if (inw(base + 0xe) & 0x1) {
return 1;
} else {
spin_unlock_irqrestore(&card->card_lock, card->flags);
udelay(1000); /* 1ms */
}
}
printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%x)\n", card->base);
return 0; /* Failed to aquire the card! */
}
static int lock_card_at_interrupt(struct isi_board *card)
{
unsigned char retries;
unsigned short base = card->base;
for (retries = 0; retries < 200; retries++) {
spin_lock_irqsave(&card->card_lock, card->flags);
if (inw(base + 0xe) & 0x1)
return 1;
else
spin_unlock_irqrestore(&card->card_lock, card->flags);
}
/* Failing in interrupt is an acceptable event */
return 0; /* Failed to aquire the card! */
}
static void unlock_card(struct isi_board *card)
{
spin_unlock_irqrestore(&card->card_lock, card->flags);
}
/*
* ISI Card specific ops ...
*/
static void raise_dtr(struct isi_port * port)
{
struct isi_board * card = port->card;
unsigned short base = card->base;
unsigned char channel = port->channel;
if (!lock_card(card))
return;
outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
outw(0x0504, base);
InterruptTheCard(base);
port->status |= ISI_DTR;
unlock_card(card);
}
static inline void drop_dtr(struct isi_port * port)
{
struct isi_board * card = port->card;
unsigned short base = card->base;
unsigned char channel = port->channel;
if (!lock_card(card))
return;
outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
outw(0x0404, base);
InterruptTheCard(base);
port->status &= ~ISI_DTR;
unlock_card(card);
}
static inline void raise_rts(struct isi_port * port)
{
struct isi_board * card = port->card;
unsigned short base = card->base;
unsigned char channel = port->channel;
if (!lock_card(card))
return;
outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
outw(0x0a04, base);
InterruptTheCard(base);
port->status |= ISI_RTS;
unlock_card(card);
}
static inline void drop_rts(struct isi_port * port)
{
struct isi_board * card = port->card;
unsigned short base = card->base;
unsigned char channel = port->channel;
if (!lock_card(card))
return;
outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
outw(0x0804, base);
InterruptTheCard(base);
port->status &= ~ISI_RTS;
unlock_card(card);
}
static inline void raise_dtr_rts(struct isi_port * port)
{
struct isi_board * card = port->card;
unsigned short base = card->base;
unsigned char channel = port->channel;
if (!lock_card(card))
return;
outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
outw(0x0f04, base);
InterruptTheCard(base);
port->status |= (ISI_DTR | ISI_RTS);
unlock_card(card);
}
static void drop_dtr_rts(struct isi_port * port)
{
struct isi_board * card = port->card;
unsigned short base = card->base;
unsigned char channel = port->channel;
if (!lock_card(card))
return;
outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
outw(0x0c04, base);
InterruptTheCard(base);
port->status &= ~(ISI_RTS | ISI_DTR);
unlock_card(card);
}
static inline void kill_queue(struct isi_port * port, short queue)
{
struct isi_board * card = port->card;
unsigned short base = card->base;
unsigned char channel = port->channel;
if (!lock_card(card))
return;
outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
outw((queue << 8) | 0x06, base);
InterruptTheCard(base);
unlock_card(card);
}
/*
* Firmware loader driver specific routines. This needs to mostly die
* and be replaced with request_firmware.
*/
static struct file_operations ISILoad_fops = {
.owner = THIS_MODULE,
.ioctl = ISILoad_ioctl,
};
static struct miscdevice isiloader_device = {
ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops
};
static inline int WaitTillCardIsFree(unsigned short base)
{
unsigned long count=0;
while( (!(inw(base+0xe) & 0x1)) && (count++ < 6000000));
if (inw(base+0xe)&0x1)
return 0;
else
return 1;
}
static int ISILoad_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
unsigned int card, i, j, signature, status, portcount = 0;
unsigned long t;
unsigned short word_count, base;
bin_frame frame;
void __user *argp = (void __user *)arg;
/* exec_record exec_rec; */
if(get_user(card, (int __user *)argp))
return -EFAULT;
if(card < 0 || card >= BOARD_COUNT)
return -ENXIO;
base=isi_card[card].base;
if(base==0)
return -ENXIO; /* disabled or not used */
switch(cmd) {
case MIOCTL_RESET_CARD:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%x ",card+1,base);
inw(base+0x8);
for(t=jiffies+HZ/100;time_before(jiffies, t););
outw(0,base+0x8); /* Reset */
for(j=1;j<=3;j++) {
for(t=jiffies+HZ;time_before(jiffies, t););
printk(".");
}
signature=(inw(base+0x4)) & 0xff;
if (isi_card[card].isa) {
if (!(inw(base+0xe) & 0x1) || (inw(base+0x2))) {
#ifdef ISICOM_DEBUG
printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
#endif
printk("\nISILoad:ISA Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
return -EIO;
}
}
else {
portcount = inw(base+0x2);
if (!(inw(base+0xe) & 0x1) || ((portcount!=0) && (portcount!=4) && (portcount!=8))) {
#ifdef ISICOM_DEBUG
printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
#endif
printk("\nISILoad:PCI Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
return -EIO;
}
}
switch(signature) {
case 0xa5:
case 0xbb:
case 0xdd:
if (isi_card[card].isa)
isi_card[card].port_count = 8;
else {
if (portcount == 4)
isi_card[card].port_count = 4;
else
isi_card[card].port_count = 8;
}
isi_card[card].shift_count = 12;
break;
case 0xcc: isi_card[card].port_count = 16;
isi_card[card].shift_count = 11;
break;
default: printk("ISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
#ifdef ISICOM_DEBUG
printk("Sig=0x%x\n",signature);
#endif
return -EIO;
}
printk("-Done\n");
return put_user(signature,(unsigned __user *)argp);
case MIOCTL_LOAD_FIRMWARE:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if(copy_from_user(&frame, argp, sizeof(bin_frame)))
return -EFAULT;
if (WaitTillCardIsFree(base))
return -EIO;
outw(0xf0,base); /* start upload sequence */
outw(0x00,base);
outw((frame.addr), base);/* lsb of adderess */
word_count=(frame.count >> 1) + frame.count % 2;
outw(word_count, base);
InterruptTheCard(base);
for(i=0;i<=0x2f;i++); /* a wee bit of delay */
if (WaitTillCardIsFree(base))
return -EIO;
if ((status=inw(base+0x4))!=0) {
printk(KERN_WARNING "ISILoad:Card%d rejected load header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
card+1, frame.addr, frame.count, status);
return -EIO;
}
outsw(base, (void *) frame.bin_data, word_count);
InterruptTheCard(base);
for(i=0;i<=0x0f;i++); /* another wee bit of delay */
if (WaitTillCardIsFree(base))
return -EIO;
if ((status=inw(base+0x4))!=0) {
printk(KERN_ERR "ISILoad:Card%d got out of sync.Card Status:0x%x\n",card+1, status);
return -EIO;
}
return 0;
case MIOCTL_READ_FIRMWARE:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if(copy_from_user(&frame, argp, sizeof(bin_header)))
return -EFAULT;
if (WaitTillCardIsFree(base))
return -EIO;
outw(0xf1,base); /* start download sequence */
outw(0x00,base);
outw((frame.addr), base);/* lsb of adderess */
word_count=(frame.count >> 1) + frame.count % 2;
outw(word_count+1, base);
InterruptTheCard(base);
for(i=0;i<=0xf;i++); /* a wee bit of delay */
if (WaitTillCardIsFree(base))
return -EIO;
if ((status=inw(base+0x4))!=0) {
printk(KERN_WARNING "ISILoad:Card%d rejected verify header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
card+1, frame.addr, frame.count, status);
return -EIO;
}
inw(base);
insw(base, frame.bin_data, word_count);
InterruptTheCard(base);
for(i=0;i<=0x0f;i++); /* another wee bit of delay */
if (WaitTillCardIsFree(base))
return -EIO;
if ((status=inw(base+0x4))!=0) {
printk(KERN_ERR "ISILoad:Card%d verify got out of sync.Card Status:0x%x\n",card+1, status);
return -EIO;
}
if(copy_to_user(argp, &frame, sizeof(bin_frame)))
return -EFAULT;
return 0;
case MIOCTL_XFER_CTRL:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (WaitTillCardIsFree(base))
return -EIO;
outw(0xf2, base);
outw(0x800, base);
outw(0x0, base);
outw(0x0, base);
InterruptTheCard(base);
outw(0x0, base+0x4); /* for ISI4608 cards */
isi_card[card].status |= FIRMWARE_LOADED;
return 0;
default:
#ifdef ISICOM_DEBUG
printk(KERN_DEBUG "ISILoad: Received Ioctl cmd 0x%x.\n", cmd);
#endif
return -ENOIOCTLCMD;
}
}
/*
* ISICOM Driver specific routines ...
*
*/
static inline int isicom_paranoia_check(struct isi_port const * port, char *name,
const char * routine)
{
#ifdef ISICOM_DEBUG
static const char * badmagic =
KERN_WARNING "ISICOM: Warning: bad isicom magic for dev %s in %s.\n";
static const char * badport =
KERN_WARNING "ISICOM: Warning: NULL isicom port for dev %s in %s.\n";
if (!port) {
printk(badport, name, routine);
return 1;
}
if (port->magic != ISICOM_MAGIC) {
printk(badmagic, name, routine);
return 1;
}
#endif
return 0;
}
/*
* Transmitter.
*
* We shovel data into the card buffers on a regular basis. The card
* will do the rest of the work for us.
*/
static void isicom_tx(unsigned long _data)
{
short count = (BOARD_COUNT-1), card, base;
short txcount, wrd, residue, word_count, cnt;
struct isi_port * port;
struct tty_struct * tty;
#ifdef ISICOM_DEBUG
++tx_count;
#endif
/* find next active board */
card = (prev_card + 1) & 0x0003;
while(count-- > 0) {
if (isi_card[card].status & BOARD_ACTIVE)
break;
card = (card + 1) & 0x0003;
}
if (!(isi_card[card].status & BOARD_ACTIVE))
goto sched_again;
prev_card = card;
count = isi_card[card].port_count;
port = isi_card[card].ports;
base = isi_card[card].base;
for (;count > 0;count--, port++) {
if (!lock_card_at_interrupt(&isi_card[card]))
continue;
/* port not active or tx disabled to force flow control */
if (!(port->flags & ASYNC_INITIALIZED) ||
!(port->status & ISI_TXOK))
unlock_card(&isi_card[card]);
continue;
tty = port->tty;
if(tty == NULL) {
unlock_card(&isi_card[card]);
continue;
}
txcount = min_t(short, TX_SIZE, port->xmit_cnt);
if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
unlock_card(&isi_card[card]);
continue;
}
if (!(inw(base + 0x02) & (1 << port->channel))) {
unlock_card(&isi_card[card]);
continue;
}
#ifdef ISICOM_DEBUG
printk(KERN_DEBUG "ISICOM: txing %d bytes, port%d.\n",
txcount, port->channel+1);
#endif
outw((port->channel << isi_card[card].shift_count) | txcount
, base);
residue = NO;
wrd = 0;
while (1) {
cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE - port->xmit_tail));
if (residue == YES) {
residue = NO;
if (cnt > 0) {
wrd |= (port->xmit_buf[port->xmit_tail] << 8);
port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
port->xmit_cnt--;
txcount--;
cnt--;
outw(wrd, base);
}
else {
outw(wrd, base);
break;
}
}
if (cnt <= 0) break;
word_count = cnt >> 1;
outsw(base, port->xmit_buf+port->xmit_tail, word_count);
port->xmit_tail = (port->xmit_tail + (word_count << 1)) &
(SERIAL_XMIT_SIZE - 1);
txcount -= (word_count << 1);
port->xmit_cnt -= (word_count << 1);
if (cnt & 0x0001) {
residue = YES;
wrd = port->xmit_buf[port->xmit_tail];
port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
port->xmit_cnt--;
txcount--;
}
}
InterruptTheCard(base);
if (port->xmit_cnt <= 0)
port->status &= ~ISI_TXOK;
if (port->xmit_cnt <= WAKEUP_CHARS)
schedule_work(&port->bh_tqueue);
unlock_card(&isi_card[card]);
}
/* schedule another tx for hopefully in about 10ms */
sched_again:
if (!re_schedule)
return;
init_timer(&tx);
tx.expires = jiffies + HZ/100;
tx.data = 0;
tx.function = isicom_tx;
add_timer(&tx);
return;
}
/* Interrupt handlers */
static void isicom_bottomhalf(void * data)
{
struct isi_port * port = (struct isi_port *) data;
struct tty_struct * tty = port->tty;
if (!tty)
return;
tty_wakeup(tty);
wake_up_interruptible(&tty->write_wait);
}
/*
* Main interrupt handler routine
*/
static irqreturn_t isicom_interrupt(int irq, void *dev_id,
struct pt_regs *regs)
{
struct isi_board * card;
struct isi_port * port;
struct tty_struct * tty;
unsigned short base, header, word_count, count;
unsigned char channel;
short byte_count;
card = (struct isi_board *) dev_id;
if (!card || !(card->status & FIRMWARE_LOADED))
return IRQ_NONE;
base = card->base;
spin_lock(&card->card_lock);
if (card->isa == NO) {
/*
* disable any interrupts from the PCI card and lower the
* interrupt line
*/
outw(0x8000, base+0x04);
ClearInterrupt(base);
}
inw(base); /* get the dummy word out */
header = inw(base);
channel = (header & 0x7800) >> card->shift_count;
byte_count = header & 0xff;
if (channel + 1 > card->port_count) {
printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%x): %d(channel) > port_count.\n",
base, channel+1);
if (card->isa)
ClearInterrupt(base);
else
outw(0x0000, base+0x04); /* enable interrupts */
spin_unlock(&card->card_lock);
return IRQ_HANDLED;
}
port = card->ports + channel;
if (!(port->flags & ASYNC_INITIALIZED)) {
if (card->isa)
ClearInterrupt(base);
else
outw(0x0000, base+0x04); /* enable interrupts */
return IRQ_HANDLED;
}
tty = port->tty;
if (tty == NULL) {
word_count = byte_count >> 1;
while(byte_count > 1) {
inw(base);
byte_count -= 2;
}
if (byte_count & 0x01)
inw(base);
if (card->isa == YES)
ClearInterrupt(base);
else
outw(0x0000, base+0x04); /* enable interrupts */
spin_unlock(&card->card_lock);
return IRQ_HANDLED;
}
if (header & 0x8000) { /* Status Packet */
header = inw(base);
switch(header & 0xff) {
case 0: /* Change in EIA signals */
if (port->flags & ASYNC_CHECK_CD) {
if (port->status & ISI_DCD) {
if (!(header & ISI_DCD)) {
/* Carrier has been lost */
#ifdef ISICOM_DEBUG
printk(KERN_DEBUG "ISICOM: interrupt: DCD->low.\n");
#endif
port->status &= ~ISI_DCD;
schedule_work(&port->hangup_tq);
}
}
else {
if (header & ISI_DCD) {
/* Carrier has been detected */
#ifdef ISICOM_DEBUG
printk(KERN_DEBUG "ISICOM: interrupt: DCD->high.\n");
#endif
port->status |= ISI_DCD;
wake_up_interruptible(&port->open_wait);
}
}
}
else {
if (header & ISI_DCD)
port->status |= ISI_DCD;
else
port->status &= ~ISI_DCD;
}
if (port->flags & ASYNC_CTS_FLOW) {
if (port->tty->hw_stopped) {
if (header & ISI_CTS) {
port->tty->hw_stopped = 0;
/* start tx ing */
port->status |= (ISI_TXOK | ISI_CTS);
schedule_work(&port->bh_tqueue);
}
}
else {
if (!(header & ISI_CTS)) {
port->tty->hw_stopped = 1;
/* stop tx ing */
port->status &= ~(ISI_TXOK | ISI_CTS);
}
}
}
else {
if (header & ISI_CTS)
port->status |= ISI_CTS;
else
port->status &= ~ISI_CTS;
}
if (header & ISI_DSR)
port->status |= ISI_DSR;
else
port->status &= ~ISI_DSR;
if (header & ISI_RI)
port->status |= ISI_RI;
else
port->status &= ~ISI_RI;
break;
case 1: /* Received Break !!! */
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
break;
*tty->flip.flag_buf_ptr++ = TTY_BREAK;
*tty->flip.char_buf_ptr++ = 0;
tty->flip.count++;
if (port->flags & ASYNC_SAK)
do_SAK(tty);
schedule_delayed_work(&tty->flip.work, 1);
break;
case 2: /* Statistics */
printk(KERN_DEBUG "ISICOM: isicom_interrupt: stats!!!.\n");
break;
default:
printk(KERN_WARNING "ISICOM: Intr: Unknown code in status packet.\n");
break;
}
}
else { /* Data Packet */
count = min_t(unsigned short, byte_count, (TTY_FLIPBUF_SIZE - tty->flip.count));
#ifdef ISICOM_DEBUG
printk(KERN_DEBUG "ISICOM: Intr: Can rx %d of %d bytes.\n",
count, byte_count);
#endif
word_count = count >> 1;
insw(base, tty->flip.char_buf_ptr, word_count);
tty->flip.char_buf_ptr += (word_count << 1);
byte_count -= (word_count << 1);
if (count & 0x0001) {
*tty->flip.char_buf_ptr++ = (char)(inw(base) & 0xff);
byte_count -= 2;
}
memset(tty->flip.flag_buf_ptr, 0, count);
tty->flip.flag_buf_ptr += count;
tty->flip.count += count;
if (byte_count > 0) {
printk(KERN_DEBUG "ISICOM: Intr(0x%x:%d): Flip buffer overflow! dropping bytes...\n",
base, channel+1);
while(byte_count > 0) { /* drain out unread xtra data */
inw(base);
byte_count -= 2;
}
}
schedule_delayed_work(&tty->flip.work, 1);
}
if (card->isa == YES)
ClearInterrupt(base);
else
outw(0x0000, base+0x04); /* enable interrupts */
return IRQ_HANDLED;
}
static void isicom_config_port(struct isi_port * port)
{
struct isi_board * card = port->card;
struct tty_struct * tty;
unsigned long baud;
unsigned short channel_setup, base = card->base;
unsigned short channel = port->channel, shift_count = card->shift_count;
unsigned char flow_ctrl;
if (!(tty = port->tty) || !tty->termios)
return;
baud = C_BAUD(tty);
if (baud & CBAUDEX) {
baud &= ~CBAUDEX;
/* if CBAUDEX bit is on and the baud is set to either 50 or 75
* then the card is programmed for 57.6Kbps or 115Kbps
* respectively.
*/
if (baud < 1 || baud > 2)
port->tty->termios->c_cflag &= ~CBAUDEX;
else
baud += 15;
}
if (baud == 15) {
/* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
* by the set_serial_info ioctl ... this is done by
* the 'setserial' utility.
*/
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
baud++; /* 57.6 Kbps */
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
baud +=2; /* 115 Kbps */
}
if (linuxb_to_isib[baud] == -1) {
/* hang up */
drop_dtr(port);
return;