*
* 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 acme@conectiva.com.br 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
*
* Omit those entries for boards you don't have installed.
*
- * TODO
- * Hotplug
- * Merge testing
- * 64-bit verification
*/
#include <linux/module.h>
MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
static int prev_card = 3; /* start servicing isi_card[0] */
+static struct isi_board * irq_to_board[16];
static struct tty_driver *isicom_normal;
static struct isi_board isi_card[BOARD_COUNT];
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;
-};
-
-/*
- * 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.
+ * Firmware loader driver specific routines
+ *
*/
static struct file_operations ISILoad_fops = {
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.
- */
+/* Transmitter */
static void isicom_tx(unsigned long _data)
{
short count = (BOARD_COUNT-1), card, base;
- short txcount, wrd, residue, word_count, cnt;
+ short txcount, wait, wrd, residue, word_count, cnt;
struct isi_port * port;
struct tty_struct * tty;
+ unsigned long flags;
#ifdef ISICOM_DEBUG
++tx_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]);
+ if (!(port->status & ISI_TXOK))
continue;
tty = port->tty;
-
-
- if(tty == NULL) {
- unlock_card(&isi_card[card]);
+ save_flags(flags); cli();
+ txcount = min_t(short, TX_SIZE, port->xmit_cnt);
+ if ((txcount <= 0) || tty->stopped || tty->hw_stopped) {
+ restore_flags(flags);
continue;
}
-
- txcount = min_t(short, TX_SIZE, port->xmit_cnt);
- if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
- unlock_card(&isi_card[card]);
+ wait = 200;
+ while(((inw(base+0x0e) & 0x01) == 0) && (wait-- > 0));
+ if (wait <= 0) {
+ restore_flags(flags);
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: isicom_tx:Card(0x%x) found busy.\n",
+ card);
+#endif
continue;
}
if (!(inw(base + 0x02) & (1 << port->channel))) {
- unlock_card(&isi_card[card]);
+ restore_flags(flags);
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: isicom_tx: cannot tx to 0x%x:%d.\n",
+ base, port->channel + 1);
+#endif
continue;
}
#ifdef ISICOM_DEBUG
port->status &= ~ISI_TXOK;
if (port->xmit_cnt <= WAKEUP_CHARS)
schedule_work(&port->bh_tqueue);
- unlock_card(&isi_card[card]);
+ restore_flags(flags);
}
- /* schedule another tx for hopefully in about 10ms */
+ /* schedule another tx for hopefully in about 10ms */
sched_again:
if (!re_schedule)
return;
wake_up_interruptible(&tty->write_wait);
}
-/*
- * Main interrupt handler routine
- */
-
+/* main interrupt handler routine */
static irqreturn_t isicom_interrupt(int irq, void *dev_id,
struct pt_regs *regs)
{
unsigned char channel;
short byte_count;
- card = (struct isi_board *) dev_id;
+ /*
+ * find the source of interrupt
+ */
+
+ for(count = 0; count < BOARD_COUNT; count++) {
+ card = &isi_card[count];
+ if (card->base != 0) {
+ if (((card->isa == YES) && (card->irq == irq)) ||
+ ((card->isa == NO) && (card->irq == irq) && (inw(card->base+0x0e) & 0x02)))
+ break;
+ }
+ card = NULL;
+ }
- if (!card || !(card->status & FIRMWARE_LOADED))
+ if (!card || !(card->status & FIRMWARE_LOADED)) {
+/* printk(KERN_DEBUG "ISICOM: interrupt: not handling irq%d!.\n", irq);*/
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
- */
+ /*
+ * disable any interrupts from the PCI card and lower the
+ * interrupt line
+ */
outw(0x8000, base+0x04);
ClearInterrupt(base);
}
header = inw(base);
channel = (header & 0x7800) >> card->shift_count;
byte_count = header & 0xff;
-
- if (channel + 1 > card->port_count) {
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM:Intr:(0x%x:%d).\n", base, channel+1);
+#endif
+ 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;
}
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);
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
break;
*tty->flip.flag_buf_ptr++ = TTY_BREAK;
+ /* dunno if this is right */
*tty->flip.char_buf_ptr++ = 0;
tty->flip.count++;
if (port->flags & ASYNC_SAK)
return IRQ_HANDLED;
}
+ /* called with interrupts disabled */
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_setup, wait, base = card->base;
unsigned short channel = port->channel, shift_count = card->shift_count;
unsigned char flow_ctrl;
else
raise_dtr(port);
- if (lock_card(card)) {
- outw(0x8000 | (channel << shift_count) |0x03, base);
- outw(linuxb_to_isib[baud] << 8 | 0x03, base);
- channel_setup = 0;
- switch(C_CSIZE(tty)) {
- case CS5:
- channel_setup |= ISICOM_CS5;
- break;
- case CS6:
- channel_setup |= ISICOM_CS6;
- break;
- case CS7:
- channel_setup |= ISICOM_CS7;
- break;
- case CS8:
- channel_setup |= ISICOM_CS8;
- break;
- }
-
- if (C_CSTOPB(tty))
- channel_setup |= ISICOM_2SB;
- if (C_PARENB(tty)) {
- channel_setup |= ISICOM_EVPAR;
- if (C_PARODD(tty))
- channel_setup |= ISICOM_ODPAR;
- }
- outw(channel_setup, base);
- InterruptTheCard(base);
- unlock_card(card);
- }
+ wait = 100;
+ while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
+ if (!wait) {
+ printk(KERN_WARNING "ISICOM: Card found busy in isicom_config_port at channel setup.\n");
+ return;
+ }
+ outw(0x8000 | (channel << shift_count) |0x03, base);
+ outw(linuxb_to_isib[baud] << 8 | 0x03, base);
+ channel_setup = 0;
+ switch(C_CSIZE(tty)) {
+ case CS5:
+ channel_setup |= ISICOM_CS5;
+ break;
+ case CS6:
+ channel_setup |= ISICOM_CS6;
+ break;
+ case CS7:
+ channel_setup |= ISICOM_CS7;
+ break;
+ case CS8:
+ channel_setup |= ISICOM_CS8;
+ break;
+ }
+
+ if (C_CSTOPB(tty))
+ channel_setup |= ISICOM_2SB;
+
+ if (C_PARENB(tty))
+ channel_setup |= ISICOM_EVPAR;
+ if (C_PARODD(tty))
+ channel_setup |= ISICOM_ODPAR;
+ outw(channel_setup, base);
+ InterruptTheCard(base);
+
if (C_CLOCAL(tty))
port->flags &= ~ASYNC_CHECK_CD;
else
if (I_IXOFF(tty))
flow_ctrl |= ISICOM_INITIATE_XONXOFF;
- if (lock_card(card)) {
- outw(0x8000 | (channel << shift_count) |0x04, base);
- outw(flow_ctrl << 8 | 0x05, base);
- outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
- InterruptTheCard(base);
- unlock_card(card);
- }
+ wait = 100;
+ while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
+ if (!wait) {
+ printk(KERN_WARNING "ISICOM: Card found busy in isicom_config_port at flow setup.\n");
+ return;
+ }
+ outw(0x8000 | (channel << shift_count) |0x04, base);
+ outw(flow_ctrl << 8 | 0x05, base);
+ outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
+ InterruptTheCard(base);
/* rx enabled -> enable port for rx on the card */
if (C_CREAD(tty)) {
card->port_status |= (1 << channel);
outw(card->port_status, base + 0x02);
}
+
}
/* open et all */
struct isi_port * port;
unsigned long flags;
- spin_lock_irqsave(&bp->card_lock, flags);
- if (bp->status & BOARD_ACTIVE) {
- spin_unlock_irqrestore(&bp->card_lock, flags);
+ if (bp->status & BOARD_ACTIVE)
return;
- }
port = bp->ports;
- bp->status |= BOARD_ACTIVE;
- spin_unlock_irqrestore(&bp->card_lock, flags);
- for(channel = 0; channel < bp->port_count; channel++, port++)
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: setup_board: drop_dtr_rts start, port_count %d...\n", bp->port_count);
+#endif
+ for(channel = 0; channel < bp->port_count; channel++, port++) {
+ save_flags(flags); cli();
drop_dtr_rts(port);
+ restore_flags(flags);
+ }
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: setup_board: drop_dtr_rts stop...\n");
+#endif
+
+ bp->status |= BOARD_ACTIVE;
return;
}
struct isi_board * card = port->card;
unsigned long flags;
- if (port->flags & ASYNC_INITIALIZED) {
+ if (port->flags & ASYNC_INITIALIZED)
return 0;
- }
if (!port->xmit_buf) {
unsigned long page;
}
port->xmit_buf = (unsigned char *) page;
}
-
- spin_lock_irqsave(&card->card_lock, flags);
+ save_flags(flags); cli();
if (port->tty)
clear_bit(TTY_IO_ERROR, &port->tty->flags);
if (port->count == 1)
isicom_config_port(port);
port->flags |= ASYNC_INITIALIZED;
- spin_unlock_irqrestore(&card->card_lock, flags);
+
+ restore_flags(flags);
return 0;
}
static int block_til_ready(struct tty_struct * tty, struct file * filp, struct isi_port * port)
{
- struct isi_board * card = port->card;
int do_clocal = 0, retval;
- unsigned long flags;
DECLARE_WAITQUEUE(wait, current);
/* block if port is in the process of being closed */
if (C_CLOCAL(tty))
do_clocal = 1;
+#ifdef ISICOM_DEBUG
+ if (do_clocal)
+ printk(KERN_DEBUG "ISICOM: block_til_ready: CLOCAL set.\n");
+#endif
/* block waiting for DCD to be asserted, and while
callout dev is busy */
retval = 0;
add_wait_queue(&port->open_wait, &wait);
-
- spin_lock_irqsave(&card->card_lock, flags);
- if (!tty_hung_up_p(filp))
- port->count--;
+ cli();
+ if (!tty_hung_up_p(filp))
+ port->count--;
+ sti();
port->blocked_open++;
- spin_unlock_irqrestore(&card->card_lock, flags);
-
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: block_til_ready: waiting for DCD...\n");
+#endif
while (1) {
+ cli();
raise_dtr_rts(port);
-
+ sti();
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
if (port->flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: block_til_ready: tty_hung_up_p || not init.\n");
+#endif
break;
}
if (!(port->flags & ASYNC_CLOSING) &&
(do_clocal || (port->status & ISI_DCD))) {
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: block_til_ready: do_clocal || DCD.\n");
+#endif
break;
}
if (signal_pending(current)) {
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: block_til_ready: sig blocked.\n");
+#endif
retval = -ERESTARTSYS;
break;
}
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&port->open_wait, &wait);
- spin_lock_irqsave(&card->card_lock, flags);
if (!tty_hung_up_p(filp))
port->count++;
port->blocked_open--;
- spin_unlock_irqrestore(&card->card_lock, flags);
if (retval)
return retval;
port->flags |= ASYNC_NORMAL_ACTIVE;
unsigned int line, board;
int error;
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: open start!!!.\n");
+#endif
line = tty->index;
- if (line < 0 || line > PORT_COUNT-1)
+
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "line = %d.\n", line);
+#endif
+
+ if ((line < 0) || (line > (PORT_COUNT-1)))
return -ENODEV;
board = BOARD(line);
- card = &isi_card[board];
- if (!(card->status & FIRMWARE_LOADED))
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "board = %d.\n", board);
+#endif
+
+ card = &isi_card[board];
+ if (!(card->status & FIRMWARE_LOADED)) {
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG"ISICOM: Firmware not loaded to card%d.\n", board);
+#endif
return -ENODEV;
+ }
/* open on a port greater than the port count for the card !!! */
- if (line > ((board * 16) + card->port_count - 1))
+ if (line > ((board * 16) + card->port_count - 1)) {
+ printk(KERN_ERR "ISICOM: Open on a port which exceeds the port_count of the card!\n");
return -ENODEV;
-
+ }
port = &isi_ports[line];
if (isicom_paranoia_check(port, tty->name, "isicom_open"))
return -ENODEV;
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: isicom_setup_board ...\n");
+#endif
isicom_setup_board(card);
port->count++;
tty->driver_data = port;
port->tty = tty;
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: isicom_setup_port ...\n");
+#endif
if ((error = isicom_setup_port(port))!=0)
return error;
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: block_til_ready ...\n");
+#endif
if ((error = block_til_ready(tty, filp, port))!=0)
return error;
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: open end!!!.\n");
+#endif
return 0;
}
static inline void isicom_shutdown_board(struct isi_board * bp)
{
- unsigned long flags;
-
- spin_lock_irqsave(&bp->card_lock, flags);
- if (bp->status & BOARD_ACTIVE) {
- bp->status &= ~BOARD_ACTIVE;
- }
- spin_unlock_irqrestore(&bp->card_lock, flags);
+ int channel;
+ struct isi_port * port;
+
+ if (!(bp->status & BOARD_ACTIVE))
+ return;
+ bp->status &= ~BOARD_ACTIVE;
+ port = bp->ports;
+ for(channel = 0; channel < bp->port_count; channel++, port++) {
+ drop_dtr_rts(port);
+ }
}
static void isicom_shutdown_port(struct isi_port * port)
{
struct isi_board * card = port->card;
struct tty_struct * tty;
- unsigned long flags;
- tty = port->tty;
-
- spin_lock_irqsave(&card->card_lock, flags);
- if (!(port->flags & ASYNC_INITIALIZED)) {
- spin_unlock_irqrestore(&card->card_lock, flags);
+ if (!(port->flags & ASYNC_INITIALIZED))
return;
- }
if (port->xmit_buf) {
free_page((unsigned long) port->xmit_buf);
port->xmit_buf = NULL;
}
- port->flags &= ~ASYNC_INITIALIZED;
- /* 3rd October 2000 : Vinayak P Risbud */
- port->tty = 0;
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- /*Fix done by Anil .S on 30-04-2001
- remote login through isi port has dtr toggle problem
- due to which the carrier drops before the password prompt
- appears on the remote end. Now we drop the dtr only if the
- HUPCL(Hangup on close) flag is set for the tty*/
-
- if (C_HUPCL(tty))
+ if (!(tty = port->tty) || C_HUPCL(tty))
/* drop dtr on this port */
drop_dtr(port);
/* any other port uninits */
+
if (tty)
set_bit(TTY_IO_ERROR, &tty->flags);
+ port->flags &= ~ASYNC_INITIALIZED;
if (--card->count < 0) {
printk(KERN_DEBUG "ISICOM: isicom_shutdown_port: bad board(0x%x) count %d.\n",
}
/* last port was closed , shutdown that boad too */
- if(C_HUPCL(tty)) {
- if (!card->count)
- isicom_shutdown_board(card);
- }
+ if (!card->count)
+ isicom_shutdown_board(card);
}
static void isicom_close(struct tty_struct * tty, struct file * filp)
printk(KERN_DEBUG "ISICOM: Close start!!!.\n");
#endif
- spin_lock_irqsave(&card->card_lock, flags);
+ save_flags(flags); cli();
if (tty_hung_up_p(filp)) {
- spin_unlock_irqrestore(&card->card_lock, flags);
+ restore_flags(flags);
return;
}
- if (tty->count == 1 && port->count != 1) {
+ if ((tty->count == 1) && (port->count != 1)) {
printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count"
"tty->count = 1 port count = %d.\n",
card->base, port->count);
}
if (port->count) {
- spin_unlock_irqrestore(&card->card_lock, flags);
+ restore_flags(flags);
return;
}
port->flags |= ASYNC_CLOSING;
tty->closing = 1;
- spin_unlock_irqrestore(&card->card_lock, flags);
-
if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, port->closing_wait);
/* indicate to the card that no more data can be received
on this port */
- spin_lock_irqsave(&card->card_lock, flags);
if (port->flags & ASYNC_INITIALIZED) {
card->port_status &= ~(1 << port->channel);
outw(card->port_status, card->base + 0x02);
}
isicom_shutdown_port(port);
- spin_unlock_irqrestore(&card->card_lock, flags);
-
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
+
tty_ldisc_flush(tty);
-
- spin_lock_irqsave(&card->card_lock, flags);
tty->closing = 0;
-
+ port->tty = NULL;
if (port->blocked_open) {
- spin_unlock_irqrestore(&card->card_lock, flags);
if (port->close_delay) {
+ set_current_state(TASK_INTERRUPTIBLE);
#ifdef ISICOM_DEBUG
printk(KERN_DEBUG "ISICOM: scheduling until time out.\n");
#endif
- msleep_interruptible(jiffies_to_msecs(port->close_delay));
+ schedule_timeout(port->close_delay);
}
- spin_lock_irqsave(&card->card_lock, flags);
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
wake_up_interruptible(&port->close_wait);
- spin_unlock_irqrestore(&card->card_lock, flags);
+ restore_flags(flags);
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: Close end!!!.\n");
+#endif
}
/* write et all */
-static int isicom_write(struct tty_struct * tty,
+static int isicom_write(struct tty_struct * tty, int from_user,
const unsigned char * buf, int count)
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
- struct isi_board * card = port->card;
unsigned long flags;
int cnt, total = 0;
-
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: isicom_write for port%d: %d bytes.\n",
+ port->channel+1, count);
+#endif
if (isicom_paranoia_check(port, tty->name, "isicom_write"))
return 0;
if (!tty || !port->xmit_buf || !tmp_buf)
return 0;
+ if (from_user)
+ down(&tmp_buf_sem); /* acquire xclusive access to tmp_buf */
- spin_lock_irqsave(&card->card_lock, flags);
-
+ save_flags(flags);
while(1) {
+ cli();
cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
SERIAL_XMIT_SIZE - port->xmit_head));
if (cnt <= 0)
break;
- memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
+ if (from_user) {
+ /* the following may block for paging... hence
+ enabling interrupts but tx routine may have
+ created more space in xmit_buf when the ctrl
+ gets back here */
+ sti();
+ if (copy_from_user(tmp_buf, buf, cnt)) {
+ up(&tmp_buf_sem);
+ restore_flags(flags);
+ return -EFAULT;
+ }
+ cli();
+ cnt = min_t(int, cnt, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - port->xmit_head));
+ memcpy(port->xmit_buf + port->xmit_head, tmp_buf, cnt);
+ }
+ else
+ memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1);
port->xmit_cnt += cnt;
+ restore_flags(flags);
buf += cnt;
count -= cnt;
total += cnt;
}
+ if (from_user)
+ up(&tmp_buf_sem);
if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
port->status |= ISI_TXOK;
- spin_unlock_irqrestore(&card->card_lock, flags);
+ restore_flags(flags);
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: isicom_write %d bytes written.\n", total);
+#endif
return total;
}
static void isicom_put_char(struct tty_struct * tty, unsigned char ch)
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
- struct isi_board * card = port->card;
unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
if (!tty || !port->xmit_buf)
return;
-
- spin_lock_irqsave(&card->card_lock, flags);
- if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
- spin_unlock_irqrestore(&card->card_lock, flags);
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: put_char, port %d, char %c.\n", port->channel+1, ch);
+#endif
+
+ save_flags(flags); cli();
+
+ if (port->xmit_cnt >= (SERIAL_XMIT_SIZE - 1)) {
+ restore_flags(flags);
return;
}
port->xmit_buf[port->xmit_head++] = ch;
port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
port->xmit_cnt++;
- spin_unlock_irqrestore(&card->card_lock, flags);
+ restore_flags(flags);
}
/* flush_chars et all */
if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
return;
- if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || !port->xmit_buf)
+ if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !port->xmit_buf)
return;
/* this tells the transmitter to consider this port for
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
int free;
-
if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
return 0;
static inline void isicom_send_break(struct isi_port * port, unsigned long length)
{
struct isi_board * card = port->card;
+ short wait = 10;
unsigned short base = card->base;
+ unsigned long flags;
- if(!lock_card(card))
- return;
-
+ save_flags(flags); cli();
+ while (((inw(base + 0x0e) & 0x0001) == 0) && (wait-- > 0));
+ if (!wait) {
+ printk(KERN_DEBUG "ISICOM: Card found busy in isicom_send_break.\n");
+ goto out;
+ }
outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
outw((length & 0xff) << 8 | 0x00, base);
outw((length & 0xff00), base);
InterruptTheCard(base);
-
- unlock_card(card);
+out: restore_flags(flags);
}
static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
unsigned int set, unsigned int clear)
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
+ unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
return -ENODEV;
+ save_flags(flags); cli();
if (set & TIOCM_RTS)
raise_rts(port);
if (set & TIOCM_DTR)
if (clear & TIOCM_DTR)
drop_dtr(port);
+ restore_flags(flags);
return 0;
}
struct serial_struct __user *info)
{
struct serial_struct newinfo;
+ unsigned long flags;
int reconfig_port;
if(copy_from_user(&newinfo, info, sizeof(newinfo)))
(newinfo.flags & ASYNC_FLAGS));
}
if (reconfig_port) {
+ save_flags(flags); cli();
isicom_config_port(port);
+ restore_flags(flags);
}
return 0;
}
static void isicom_set_termios(struct tty_struct * tty, struct termios * old_termios)
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
+ unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
return;
tty->termios->c_iflag == old_termios->c_iflag)
return;
+ save_flags(flags); cli();
isicom_config_port(port);
+ restore_flags(flags);
if ((old_termios->c_cflag & CRTSCTS) &&
!(tty->termios->c_cflag & CRTSCTS)) {
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
struct isi_board * card = port->card;
+ unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
return;
/* tell the card that this port cannot handle any more data for now */
+ save_flags(flags); cli();
card->port_status &= ~(1 << port->channel);
outw(card->port_status, card->base + 0x02);
+ restore_flags(flags);
}
/* unthrottle et all */
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
struct isi_board * card = port->card;
+ unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
return;
/* tell the card that this port is ready to accept more data */
+ save_flags(flags); cli();
card->port_status |= (1 << port->channel);
outw(card->port_status, card->base + 0x02);
+ restore_flags(flags);
}
/* stop et all */
tty = port->tty;
if (tty)
- tty_hangup(tty);
+ tty_hangup(tty); /* FIXME: module removal race here - AKPM */
}
static void isicom_hangup(struct tty_struct * tty)
static void isicom_flush_buffer(struct tty_struct * tty)
{
struct isi_port * port = (struct isi_port *) tty->driver_data;
- struct isi_board * card = port->card;
unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
return;
- spin_lock_irqsave(&card->card_lock, flags);
+ save_flags(flags); cli();
port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
- spin_unlock_irqrestore(&card->card_lock, flags);
+ restore_flags(flags);
wake_up_interruptible(&tty->write_wait);
tty_wakeup(tty);
}
-static int __init register_ioregion(void)
+static int register_ioregion(void)
{
int count, done=0;
for (count=0; count < BOARD_COUNT; count++ ) {
return done;
}
-static void __exit unregister_ioregion(void)
+static void unregister_ioregion(void)
{
int count;
for (count=0; count < BOARD_COUNT; count++ )
.tiocmset = isicom_tiocmset,
};
-static int __init register_drivers(void)
+static int register_drivers(void)
{
int error;
return 0;
}
-static void __exit unregister_drivers(void)
+static void unregister_drivers(void)
{
int error = tty_unregister_driver(isicom_normal);
if (error)
put_tty_driver(isicom_normal);
}
-static int __init register_isr(void)
+static int register_isr(void)
{
- int count, done=0;
- unsigned long irqflags;
-
+ int count, done=0, card;
+ int flag;
+ unsigned char request;
for (count=0; count < BOARD_COUNT; count++ ) {
if (isi_card[count].base) {
- irqflags = (isi_card[count].isa == YES) ?
- SA_INTERRUPT :
- (SA_INTERRUPT | SA_SHIRQ);
-
- if (request_irq(isi_card[count].irq,
- isicom_interrupt,
- irqflags,
- ISICOM_NAME, &isi_card[count])) {
-
- printk(KERN_WARNING "ISICOM: Could not"
- " install handler at Irq %d."
- " Card%d will be disabled.\n",
- isi_card[count].irq, count+1);
-
+ /*
+ * verify if the required irq has already been requested for
+ * another ISI Card, if so we already have it, else request it
+ */
+ request = YES;
+ for(card = 0; card < count; card++)
+ if ((isi_card[card].base) && (isi_card[card].irq == isi_card[count].irq)) {
+ request = NO;
+ if ((isi_card[count].isa == NO) && (isi_card[card].isa == NO))
+ break;
+ /*
+ * ISA cards cannot share interrupts with other
+ * PCI or ISA devices hence disable this card.
+ */
release_region(isi_card[count].base,16);
- isi_card[count].base=0;
+ isi_card[count].base = 0;
+ break;
+ }
+ flag=0;
+ if(isi_card[count].isa == NO)
+ flag |= SA_SHIRQ;
+
+ if (request == YES) {
+ if (request_irq(isi_card[count].irq, isicom_interrupt, SA_INTERRUPT|flag, ISICOM_NAME, NULL)) {
+ printk(KERN_WARNING "ISICOM: Could not install handler at Irq %d. Card%d will be disabled.\n",
+ isi_card[count].irq, count+1);
+ release_region(isi_card[count].base,16);
+ isi_card[count].base=0;
+ }
+ else {
+ printk(KERN_INFO "ISICOM: Card%d at 0x%x using irq %d.\n",
+ count+1, isi_card[count].base, isi_card[count].irq);
+
+ irq_to_board[isi_card[count].irq]=&isi_card[count];
+ done++;
+ }
}
- else
- done++;
}
}
return done;
}
-static void __exit unregister_isr(void)
+static void unregister_isr(void)
{
- int count;
-
+ int count, card;
+ unsigned char freeirq;
for (count=0; count < BOARD_COUNT; count++ ) {
- if (isi_card[count].base)
- free_irq(isi_card[count].irq, &isi_card[count]);
+ if (isi_card[count].base) {
+ freeirq = YES;
+ for(card = 0; card < count; card++)
+ if ((isi_card[card].base) && (isi_card[card].irq == isi_card[count].irq)) {
+ freeirq = NO;
+ break;
+ }
+ if (freeirq == YES) {
+ free_irq(isi_card[count].irq, NULL);
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: Irq %d released for Card%d.\n",isi_card[count].irq, count+1);
+#endif
+ }
+ }
}
}
-static int __init isicom_init(void)
+static int isicom_init(void)
{
int card, channel, base;
struct isi_port * port;
for (card = 0; card < BOARD_COUNT; card++) {
port = &isi_ports[card * 16];
isi_card[card].ports = port;
- spin_lock_init(&isi_card[card].card_lock);
base = isi_card[card].base;
for (channel = 0; channel < 16; channel++, port++) {
port->magic = ISICOM_MAGIC;
port->card = &isi_card[card];
- port->channel = channel;
+ port->channel = channel;
port->close_delay = 50 * HZ/100;
port->closing_wait = 3000 * HZ/100;
INIT_WORK(&port->hangup_tq, do_isicom_hangup, port);
MODULE_AUTHOR("MultiTech");
MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
MODULE_LICENSE("GPL");
-module_param_array(io, int, NULL, 0);
+MODULE_PARM(io, "1-4i");
MODULE_PARM_DESC(io, "I/O ports for the cards");
-module_param_array(irq, int, NULL, 0);
+MODULE_PARM(irq, "1-4i");
MODULE_PARM_DESC(irq, "Interrupts for the cards");
-static int __devinit isicom_setup(void)
+int init_module(void)
{
struct pci_dev *dev = NULL;
int retval, card, idx, count;
return 0;
}
-static void __exit isicom_exit(void)
+void cleanup_module(void)
{
re_schedule = 0;
- /* FIXME */
msleep(1000);
+
+#ifdef ISICOM_DEBUG
+ printk("ISICOM: isicom_tx tx_count = %ld.\n", tx_count);
+#endif
+
+#ifdef ISICOM_DEBUG
+ printk("ISICOM: uregistering isr ...\n");
+#endif
unregister_isr();
+
+#ifdef ISICOM_DEBUG
+ printk("ISICOM: unregistering drivers ...\n");
+#endif
unregister_drivers();
+
+#ifdef ISICOM_DEBUG
+ printk("ISICOM: unregistering ioregion ...\n");
+#endif
unregister_ioregion();
- if(tmp_buf)
- free_page((unsigned long)tmp_buf);
+
+#ifdef ISICOM_DEBUG
+ printk("ISICOM: freeing tmp_buf ...\n");
+#endif
+ free_page((unsigned long)tmp_buf);
+
+#ifdef ISICOM_DEBUG
+ printk("ISICOM: unregistering firmware loader ...\n");
+#endif
if (misc_deregister(&isiloader_device))
printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
}
-
-module_init(isicom_setup);
-module_exit(isicom_exit);