*
* 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
- *
+ * Firmware loader driver specific routines. This needs to mostly die
+ * and be replaced with request_firmware.
*/
static struct file_operations ISILoad_fops = {
return 0;
}
-/* Transmitter */
+/*
+ * 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, wait, wrd, residue, word_count, cnt;
+ short txcount, 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->status & ISI_TXOK))
+ if (!(port->flags & ASYNC_INITIALIZED) ||
+ !(port->status & ISI_TXOK))
+ unlock_card(&isi_card[card]);
continue;
tty = port->tty;
- save_flags(flags); cli();
- txcount = min_t(short, TX_SIZE, port->xmit_cnt);
- if ((txcount <= 0) || tty->stopped || tty->hw_stopped) {
- restore_flags(flags);
+
+
+ if(tty == NULL) {
+ unlock_card(&isi_card[card]);
continue;
}
- 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
+
+ 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))) {
- restore_flags(flags);
-#ifdef ISICOM_DEBUG
- printk(KERN_DEBUG "ISICOM: isicom_tx: cannot tx to 0x%x:%d.\n",
- base, port->channel + 1);
-#endif
+ unlock_card(&isi_card[card]);
continue;
}
#ifdef ISICOM_DEBUG
port->status &= ~ISI_TXOK;
if (port->xmit_cnt <= WAKEUP_CHARS)
schedule_work(&port->bh_tqueue);
- restore_flags(flags);
+ unlock_card(&isi_card[card]);
}
- /* 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;
- /*
- * 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;
- }
+ card = (struct isi_board *) dev_id;
- if (!card || !(card->status & FIRMWARE_LOADED)) {
-/* printk(KERN_DEBUG "ISICOM: interrupt: not handling irq%d!.\n", irq);*/
+ 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
- */
+ /*
+ * 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;
-#ifdef ISICOM_DEBUG
- printk(KERN_DEBUG "ISICOM:Intr:(0x%x:%d).\n", base, channel+1);
-#endif
- if ((channel+1) > card->port_count) {
+
+ 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, wait, base = card->base;
+ unsigned short channel_setup, base = card->base;
unsigned short channel = port->channel, shift_count = card->shift_count;
unsigned char flow_ctrl;
else
raise_dtr(port);
- 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 (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);
+ }
if (C_CLOCAL(tty))
port->flags &= ~ASYNC_CHECK_CD;
else
if (I_IXOFF(tty))
flow_ctrl |= ISICOM_INITIATE_XONXOFF;
- 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);
+ 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);
+ }
/* 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;
- if (bp->status & BOARD_ACTIVE)
+ spin_lock_irqsave(&bp->card_lock, flags);
+ if (bp->status & BOARD_ACTIVE) {
+ spin_unlock_irqrestore(&bp->card_lock, flags);
return;
- port = bp->ports;
-#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
-
+ port = bp->ports;
bp->status |= BOARD_ACTIVE;
+ spin_unlock_irqrestore(&bp->card_lock, flags);
+ for(channel = 0; channel < bp->port_count; channel++, port++)
+ drop_dtr_rts(port);
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;
}
- save_flags(flags); cli();
+
+ spin_lock_irqsave(&card->card_lock, flags);
if (port->tty)
clear_bit(TTY_IO_ERROR, &port->tty->flags);
if (port->count == 1)
isicom_config_port(port);
port->flags |= ASYNC_INITIALIZED;
-
- restore_flags(flags);
+ spin_unlock_irqrestore(&card->card_lock, 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);
- cli();
- if (!tty_hung_up_p(filp))
- port->count--;
- sti();
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (!tty_hung_up_p(filp))
+ port->count--;
port->blocked_open++;
-#ifdef ISICOM_DEBUG
- printk(KERN_DEBUG "ISICOM: block_til_ready: waiting for DCD...\n");
-#endif
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
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;
-
-#ifdef ISICOM_DEBUG
- printk(KERN_DEBUG "line = %d.\n", line);
-#endif
-
- if ((line < 0) || (line > (PORT_COUNT-1)))
+ if (line < 0 || line > PORT_COUNT-1)
return -ENODEV;
board = BOARD(line);
-
-#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
+
+ if (!(card->status & FIRMWARE_LOADED))
return -ENODEV;
- }
/* open on a port greater than the port count for the card !!! */
- 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");
+ if (line > ((board * 16) + card->port_count - 1))
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)
{
- 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);
- }
+ 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);
}
static void isicom_shutdown_port(struct isi_port * port)
{
struct isi_board * card = port->card;
struct tty_struct * tty;
+ unsigned long flags;
- if (!(port->flags & ASYNC_INITIALIZED))
+ tty = port->tty;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (!(port->flags & ASYNC_INITIALIZED)) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
return;
+ }
if (port->xmit_buf) {
free_page((unsigned long) port->xmit_buf);
port->xmit_buf = NULL;
}
- if (!(tty = port->tty) || C_HUPCL(tty))
+ 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))
/* 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 (!card->count)
- isicom_shutdown_board(card);
+ if(C_HUPCL(tty)) {
+ 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
- save_flags(flags); cli();
+ spin_lock_irqsave(&card->card_lock, flags);
if (tty_hung_up_p(filp)) {
- restore_flags(flags);
+ spin_unlock_irqrestore(&card->card_lock, 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) {
- restore_flags(flags);
+ spin_unlock_irqrestore(&card->card_lock, 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
- schedule_timeout(port->close_delay);
+ msleep_interruptible(jiffies_to_msecs(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);
- restore_flags(flags);
-#ifdef ISICOM_DEBUG
- printk(KERN_DEBUG "ISICOM: Close end!!!.\n");
-#endif
+ spin_unlock_irqrestore(&card->card_lock, flags);
}
/* write et all */
-static int isicom_write(struct tty_struct * tty, int from_user,
+static int isicom_write(struct tty_struct * tty,
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 */
- save_flags(flags);
+ spin_lock_irqsave(&card->card_lock, 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;
- 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);
+ 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;
- restore_flags(flags);
-#ifdef ISICOM_DEBUG
- printk(KERN_DEBUG "ISICOM: isicom_write %d bytes written.\n", total);
-#endif
+ spin_unlock_irqrestore(&card->card_lock, flags);
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;
-#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);
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
return;
}
port->xmit_buf[port->xmit_head++] = ch;
port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
port->xmit_cnt++;
- restore_flags(flags);
+ spin_unlock_irqrestore(&card->card_lock, 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;
- 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;
- }
+ if(!lock_card(card))
+ return;
+
outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
outw((length & 0xff) << 8 | 0x00, base);
outw((length & 0xff00), base);
InterruptTheCard(base);
-out: restore_flags(flags);
+
+ unlock_card(card);
}
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); /* FIXME: module removal race here - AKPM */
+ tty_hangup(tty);
}
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;
- save_flags(flags); cli();
+ spin_lock_irqsave(&card->card_lock, flags);
port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
- restore_flags(flags);
+ spin_unlock_irqrestore(&card->card_lock, flags);
wake_up_interruptible(&tty->write_wait);
tty_wakeup(tty);
}
-static int register_ioregion(void)
+static int __init register_ioregion(void)
{
int count, done=0;
for (count=0; count < BOARD_COUNT; count++ ) {
return done;
}
-static void unregister_ioregion(void)
+static void __exit unregister_ioregion(void)
{
int count;
for (count=0; count < BOARD_COUNT; count++ )
.tiocmset = isicom_tiocmset,
};
-static int register_drivers(void)
+static int __init register_drivers(void)
{
int error;
return 0;
}
-static void unregister_drivers(void)
+static void __exit unregister_drivers(void)
{
int error = tty_unregister_driver(isicom_normal);
if (error)
put_tty_driver(isicom_normal);
}
-static int register_isr(void)
+static int __init register_isr(void)
{
- int count, done=0, card;
- int flag;
- unsigned char request;
+ int count, done=0;
+ unsigned long irqflags;
+
for (count=0; count < BOARD_COUNT; count++ ) {
if (isi_card[count].base) {
- /*
- * 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.
- */
+ 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);
+
release_region(isi_card[count].base,16);
- 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++;
- }
+ isi_card[count].base=0;
}
+ else
+ done++;
}
}
return done;
}
-static void unregister_isr(void)
+static void __exit unregister_isr(void)
{
- int count, card;
- unsigned char freeirq;
+ int count;
+
for (count=0; count < BOARD_COUNT; 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
- }
- }
+ if (isi_card[count].base)
+ free_irq(isi_card[count].irq, &isi_card[count]);
}
}
-static int isicom_init(void)
+static int __init 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_PARM(io, "1-4i");
+module_param_array(io, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O ports for the cards");
-MODULE_PARM(irq, "1-4i");
+module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(irq, "Interrupts for the cards");
-int init_module(void)
+static int __devinit isicom_setup(void)
{
struct pci_dev *dev = NULL;
int retval, card, idx, count;
return 0;
}
-void cleanup_module(void)
+static void __exit isicom_exit(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();
-
-#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(tmp_buf)
+ free_page((unsigned long)tmp_buf);
if (misc_deregister(&isiloader_device))
printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
}
+
+module_init(isicom_setup);
+module_exit(isicom_exit);
git://git.onelab.eu / linux-2.6.git / blobdiff