Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[pandora-kernel.git] / drivers / char / isicom.c
index eba2883..8f7cc19 100644 (file)
 #include <linux/delay.h>
 #include <linux/ioport.h>
 
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
 #include <asm/system.h>
 
 #include <linux/pci.h>
@@ -189,7 +189,7 @@ struct      isi_board {
        unsigned short          status;
        unsigned short          port_status; /* each bit for each port */
        unsigned short          shift_count;
-       struct isi_port         * ports;
+       struct isi_port         *ports;
        signed char             count;
        spinlock_t              card_lock; /* Card wide lock 11/5/00 -sameer */
        unsigned long           flags;
@@ -198,18 +198,11 @@ struct    isi_board {
 
 struct isi_port {
        unsigned short          magic;
-       unsigned int            flags;
-       int                     count;
-       int                     blocked_open;
-       int                     close_delay;
+       struct tty_port         port;
        u16                     channel;
        u16                     status;
-       u16                     closing_wait;
-       struct isi_board        * card;
-       struct tty_struct       * tty;
-       wait_queue_head_t       close_wait;
-       wait_queue_head_t       open_wait;
-       unsigned char           * xmit_buf;
+       struct isi_board        *card;
+       unsigned char           *xmit_buf;
        int                     xmit_head;
        int                     xmit_tail;
        int                     xmit_cnt;
@@ -405,7 +398,7 @@ static void isicom_tx(unsigned long _data)
 
        /*      find next active board  */
        card = (prev_card + 1) & 0x0003;
-       while(count-- > 0) {
+       while (count-- > 0) {
                if (isi_card[card].status & BOARD_ACTIVE)
                        break;
                card = (card + 1) & 0x0003;
@@ -428,13 +421,13 @@ static void isicom_tx(unsigned long _data)
        if (retries >= 100)
                goto unlock;
 
-       for (;count > 0;count--, port++) {
+       for (; count > 0; count--, port++) {
                /* port not active or tx disabled to force flow control */
-               if (!(port->flags & ASYNC_INITIALIZED) ||
+               if (!(port->port.flags & ASYNC_INITIALIZED) ||
                                !(port->status & ISI_TXOK))
                        continue;
 
-               tty = port->tty;
+               tty = port->port.tty;
 
                if (tty == NULL)
                        continue;
@@ -458,7 +451,7 @@ static void isicom_tx(unsigned long _data)
                        if (residue == YES) {
                                residue = NO;
                                if (cnt > 0) {
-                                       wrd |= (port->xmit_buf[port->xmit_tail]
+                                       wrd |= (port->port.xmit_buf[port->xmit_tail]
                                                                        << 8);
                                        port->xmit_tail = (port->xmit_tail + 1)
                                                & (SERIAL_XMIT_SIZE - 1);
@@ -471,16 +464,17 @@ static void isicom_tx(unsigned long _data)
                                        break;
                                }
                        }
-                       if (cnt <= 0) break;
+                       if (cnt <= 0)
+                               break;
                        word_count = cnt >> 1;
-                       outsw(base, port->xmit_buf+port->xmit_tail,word_count);
+                       outsw(base, port->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];
+                               wrd = port->port.xmit_buf[port->xmit_tail];
                                port->xmit_tail = (port->xmit_tail + 1)
                                        & (SERIAL_XMIT_SIZE - 1);
                                port->xmit_cnt--;
@@ -547,16 +541,16 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
                return IRQ_HANDLED;
        }
        port = card->ports + channel;
-       if (!(port->flags & ASYNC_INITIALIZED)) {
+       if (!(port->port.flags & ASYNC_INITIALIZED)) {
                outw(0x0000, base+0x04); /* enable interrupts */
                spin_unlock(&card->card_lock);
                return IRQ_HANDLED;
        }
 
-       tty = port->tty;
+       tty = port->port.tty;
        if (tty == NULL) {
                word_count = byte_count >> 1;
-               while(byte_count > 1) {
+               while (byte_count > 1) {
                        inw(base);
                        byte_count -= 2;
                }
@@ -569,9 +563,9 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 
        if (header & 0x8000) {          /* Status Packet */
                header = inw(base);
-               switch(header & 0xff) {
+               switch (header & 0xff) {
                case 0: /* Change in EIA signals */
-                       if (port->flags & ASYNC_CHECK_CD) {
+                       if (port->port.flags & ASYNC_CHECK_CD) {
                                if (port->status & ISI_DCD) {
                                        if (!(header & ISI_DCD)) {
                                        /* Carrier has been lost  */
@@ -584,7 +578,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
                                /* Carrier has been detected */
                                        pr_dbg("interrupt: DCD->high.\n");
                                        port->status |= ISI_DCD;
-                                       wake_up_interruptible(&port->open_wait);
+                                       wake_up_interruptible(&port->port.open_wait);
                                }
                        } else {
                                if (header & ISI_DCD)
@@ -593,17 +587,17 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
                                        port->status &= ~ISI_DCD;
                        }
 
-                       if (port->flags & ASYNC_CTS_FLOW) {
-                               if (port->tty->hw_stopped) {
+                       if (port->port.flags & ASYNC_CTS_FLOW) {
+                               if (port->port.tty->hw_stopped) {
                                        if (header & ISI_CTS) {
-                                               port->tty->hw_stopped = 0;
+                                               port->port.tty->hw_stopped = 0;
                                                /* start tx ing */
                                                port->status |= (ISI_TXOK
                                                        | ISI_CTS);
                                                tty_wakeup(tty);
                                        }
                                } else if (!(header & ISI_CTS)) {
-                                       port->tty->hw_stopped = 1;
+                                       port->port.tty->hw_stopped = 1;
                                        /* stop tx ing */
                                        port->status &= ~(ISI_TXOK | ISI_CTS);
                                }
@@ -628,7 +622,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 
                case 1: /* Received Break !!! */
                        tty_insert_flip_char(tty, 0, TTY_BREAK);
-                       if (port->flags & ASYNC_SAK)
+                       if (port->port.flags & ASYNC_SAK)
                                do_SAK(tty);
                        tty_flip_buffer_push(tty);
                        break;
@@ -656,7 +650,8 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
                if (byte_count > 0) {
                        pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
                                "bytes...\n", base, channel + 1);
-                       while(byte_count > 0) { /* drain out unread xtra data */
+               /* drain out unread xtra data */
+               while (byte_count > 0) {
                                inw(base);
                                byte_count -= 2;
                        }
@@ -679,8 +674,11 @@ static void isicom_config_port(struct isi_port *port)
                shift_count = card->shift_count;
        unsigned char flow_ctrl;
 
-       if (!(tty = port->tty) || !tty->termios)
+       tty = port->port.tty;
+
+       if (tty == NULL)
                return;
+       /* FIXME: Switch to new tty baud API */
        baud = C_BAUD(tty);
        if (baud & CBAUDEX) {
                baud &= ~CBAUDEX;
@@ -692,7 +690,7 @@ static void isicom_config_port(struct isi_port *port)
 
                /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
                if (baud < 1 || baud > 4)
-                       port->tty->termios->c_cflag &= ~CBAUDEX;
+                       port->port.tty->termios->c_cflag &= ~CBAUDEX;
                else
                        baud += 15;
        }
@@ -703,28 +701,27 @@ static void isicom_config_port(struct isi_port *port)
                 *  the 'setserial' utility.
                 */
 
-               if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+               if ((port->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 ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+               if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+                       baud += 2; /*  115  Kbps */
+               if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
                        baud += 3; /* 230 kbps*/
-               if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+               if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
                        baud += 4; /* 460 kbps*/
        }
        if (linuxb_to_isib[baud] == -1) {
                /* hang up */
                drop_dtr(port);
                return;
-       }
-       else
+       } else
                raise_dtr(port);
 
        if (WaitTillCardIsFree(base) == 0) {
-               outw(0x8000 | (channel << shift_count) |0x03, base);
+               outw(0x8000 | (channel << shift_count) | 0x03, base);
                outw(linuxb_to_isib[baud] << 8 | 0x03, base);
                channel_setup = 0;
-               switch(C_CSIZE(tty)) {
+               switch (C_CSIZE(tty)) {
                case CS5:
                        channel_setup |= ISICOM_CS5;
                        break;
@@ -750,15 +747,15 @@ static void isicom_config_port(struct isi_port *port)
                InterruptTheCard(base);
        }
        if (C_CLOCAL(tty))
-               port->flags &= ~ASYNC_CHECK_CD;
+               port->port.flags &= ~ASYNC_CHECK_CD;
        else
-               port->flags |= ASYNC_CHECK_CD;
+               port->port.flags |= ASYNC_CHECK_CD;
 
        /* flow control settings ...*/
        flow_ctrl = 0;
-       port->flags &= ~ASYNC_CTS_FLOW;
+       port->port.flags &= ~ASYNC_CTS_FLOW;
        if (C_CRTSCTS(tty)) {
-               port->flags |= ASYNC_CTS_FLOW;
+               port->port.flags |= ASYNC_CTS_FLOW;
                flow_ctrl |= ISICOM_CTSRTS;
        }
        if (I_IXON(tty))
@@ -767,7 +764,7 @@ static void isicom_config_port(struct isi_port *port)
                flow_ctrl |= ISICOM_INITIATE_XONXOFF;
 
        if (WaitTillCardIsFree(base) == 0) {
-               outw(0x8000 | (channel << shift_count) |0x04, base);
+               outw(0x8000 | (channel << shift_count) | 0x04, base);
                outw(flow_ctrl << 8 | 0x05, base);
                outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
                InterruptTheCard(base);
@@ -805,26 +802,15 @@ static int isicom_setup_port(struct isi_port *port)
        struct isi_board *card = port->card;
        unsigned long flags;
 
-       if (port->flags & ASYNC_INITIALIZED) {
+       if (port->port.flags & ASYNC_INITIALIZED)
                return 0;
-       }
-       if (!port->xmit_buf) {
-               unsigned long page;
-
-               if (!(page = get_zeroed_page(GFP_KERNEL)))
-                       return -ENOMEM;
-
-               if (port->xmit_buf) {
-                       free_page(page);
-                       return -ERESTARTSYS;
-               }
-               port->xmit_buf = (unsigned char *) page;
-       }
+       if (tty_port_alloc_xmit_buf(&port->port) < 0)
+               return -ENOMEM;
 
        spin_lock_irqsave(&card->card_lock, flags);
-       if (port->tty)
-               clear_bit(TTY_IO_ERROR, &port->tty->flags);
-       if (port->count == 1)
+       if (port->port.tty)
+               clear_bit(TTY_IO_ERROR, &port->port.tty->flags);
+       if (port->port.count == 1)
                card->count++;
 
        port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
@@ -838,7 +824,7 @@ static int isicom_setup_port(struct isi_port *port)
        }
 
        isicom_config_port(port);
-       port->flags |= ASYNC_INITIALIZED;
+       port->port.flags |= ASYNC_INITIALIZED;
        spin_unlock_irqrestore(&card->card_lock, flags);
 
        return 0;
@@ -854,10 +840,10 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 
        /* block if port is in the process of being closed */
 
-       if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
+       if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
                pr_dbg("block_til_ready: close in progress.\n");
-               interruptible_sleep_on(&port->close_wait);
-               if (port->flags & ASYNC_HUP_NOTIFY)
+               interruptible_sleep_on(&port->port.close_wait);
+               if (port->port.flags & ASYNC_HUP_NOTIFY)
                        return -EAGAIN;
                else
                        return -ERESTARTSYS;
@@ -868,7 +854,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
        if ((filp->f_flags & O_NONBLOCK) ||
                        (tty->flags & (1 << TTY_IO_ERROR))) {
                pr_dbg("block_til_ready: non-block mode.\n");
-               port->flags |= ASYNC_NORMAL_ACTIVE;
+               port->port.flags |= ASYNC_NORMAL_ACTIVE;
                return 0;
        }
 
@@ -878,26 +864,26 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
        /* block waiting for DCD to be asserted, and while
                                                callout dev is busy */
        retval = 0;
-       add_wait_queue(&port->open_wait, &wait);
+       add_wait_queue(&port->port.open_wait, &wait);
 
        spin_lock_irqsave(&card->card_lock, flags);
        if (!tty_hung_up_p(filp))
-               port->count--;
-       port->blocked_open++;
+               port->port.count--;
+       port->port.blocked_open++;
        spin_unlock_irqrestore(&card->card_lock, flags);
 
        while (1) {
                raise_dtr_rts(port);
 
                set_current_state(TASK_INTERRUPTIBLE);
-               if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
-                       if (port->flags & ASYNC_HUP_NOTIFY)
+               if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
+                       if (port->port.flags & ASYNC_HUP_NOTIFY)
                                retval = -EAGAIN;
                        else
                                retval = -ERESTARTSYS;
                        break;
                }
-               if (!(port->flags & ASYNC_CLOSING) &&
+               if (!(port->port.flags & ASYNC_CLOSING) &&
                                (do_clocal || (port->status & ISI_DCD))) {
                        break;
                }
@@ -908,15 +894,15 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
                schedule();
        }
        set_current_state(TASK_RUNNING);
-       remove_wait_queue(&port->open_wait, &wait);
+       remove_wait_queue(&port->port.open_wait, &wait);
        spin_lock_irqsave(&card->card_lock, flags);
        if (!tty_hung_up_p(filp))
-               port->count++;
-       port->blocked_open--;
+               port->port.count++;
+       port->port.blocked_open--;
        spin_unlock_irqrestore(&card->card_lock, flags);
        if (retval)
                return retval;
-       port->flags |= ASYNC_NORMAL_ACTIVE;
+       port->port.flags |= ASYNC_NORMAL_ACTIVE;
        return 0;
 }
 
@@ -946,24 +932,21 @@ static int isicom_open(struct tty_struct *tty, struct file *filp)
 
        isicom_setup_board(card);
 
-       port->count++;
+       port->port.count++;
        tty->driver_data = port;
-       port->tty = tty;
-       if ((error = isicom_setup_port(port))!=0)
-               return error;
-       if ((error = block_til_ready(tty, filp, port))!=0)
-               return error;
-
-       return 0;
+       port->port.tty = tty;
+       error = isicom_setup_port(port);
+       if (error == 0)
+               error = block_til_ready(tty, filp, port);
+       return error;
 }
 
 /* close et all */
 
 static inline void isicom_shutdown_board(struct isi_board *bp)
 {
-       if (bp->status & BOARD_ACTIVE) {
+       if (bp->status & BOARD_ACTIVE)
                bp->status &= ~BOARD_ACTIVE;
-       }
 }
 
 /* card->lock HAS to be held */
@@ -972,18 +955,15 @@ static void isicom_shutdown_port(struct isi_port *port)
        struct isi_board *card = port->card;
        struct tty_struct *tty;
 
-       tty = port->tty;
+       tty = port->port.tty;
 
-       if (!(port->flags & ASYNC_INITIALIZED))
+       if (!(port->port.flags & ASYNC_INITIALIZED))
                return;
 
-       if (port->xmit_buf) {
-               free_page((unsigned long) port->xmit_buf);
-               port->xmit_buf = NULL;
-       }
-       port->flags &= ~ASYNC_INITIALIZED;
+       tty_port_free_xmit_buf(&port->port);
+       port->port.flags &= ~ASYNC_INITIALIZED;
        /* 3rd October 2000 : Vinayak P Risbud */
-       port->tty = NULL;
+       port->port.tty = NULL;
 
        /*Fix done by Anil .S on 30-04-2001
        remote login through isi port has dtr toggle problem
@@ -1012,6 +992,22 @@ static void isicom_shutdown_port(struct isi_port *port)
        }
 }
 
+static void isicom_flush_buffer(struct tty_struct *tty)
+{
+       struct isi_port *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);
+       port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+       spin_unlock_irqrestore(&card->card_lock, flags);
+
+       tty_wakeup(tty);
+}
+
 static void isicom_close(struct tty_struct *tty, struct file *filp)
 {
        struct isi_port *port = tty->driver_data;
@@ -1032,58 +1028,57 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
                return;
        }
 
-       if (tty->count == 1 && port->count != 1) {
+       if (tty->count == 1 && port->port.count != 1) {
                printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
                        "count tty->count = 1 port count = %d.\n",
-                       card->base, port->count);
-               port->count = 1;
+                       card->base, port->port.count);
+               port->port.count = 1;
        }
-       if (--port->count < 0) {
+       if (--port->port.count < 0) {
                printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
                        "count for channel%d = %d", card->base, port->channel,
-                       port->count);
-               port->count = 0;
+                       port->port.count);
+               port->port.count = 0;
        }
 
-       if (port->count) {
+       if (port->port.count) {
                spin_unlock_irqrestore(&card->card_lock, flags);
                return;
        }
-       port->flags |= ASYNC_CLOSING;
+       port->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);
+       if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
+               tty_wait_until_sent(tty, port->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) {
+       if (port->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);
+       isicom_flush_buffer(tty);
        tty_ldisc_flush(tty);
 
        spin_lock_irqsave(&card->card_lock, flags);
        tty->closing = 0;
 
-       if (port->blocked_open) {
+       if (port->port.blocked_open) {
                spin_unlock_irqrestore(&card->card_lock, flags);
-               if (port->close_delay) {
+               if (port->port.close_delay) {
                        pr_dbg("scheduling until time out.\n");
                        msleep_interruptible(
-                               jiffies_to_msecs(port->close_delay));
+                               jiffies_to_msecs(port->port.close_delay));
                }
                spin_lock_irqsave(&card->card_lock, flags);
-               wake_up_interruptible(&port->open_wait);
+               wake_up_interruptible(&port->port.open_wait);
        }
-       port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
-       wake_up_interruptible(&port->close_wait);
+       port->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+       wake_up_interruptible(&port->port.close_wait);
        spin_unlock_irqrestore(&card->card_lock, flags);
 }
 
@@ -1099,18 +1094,15 @@ static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
        if (isicom_paranoia_check(port, tty->name, "isicom_write"))
                return 0;
 
-       if (!port->xmit_buf)
-               return 0;
-
        spin_lock_irqsave(&card->card_lock, flags);
 
-       while(1) {
+       while (1) {
                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);
+               memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
                port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
                        - 1);
                port->xmit_cnt += cnt;
@@ -1125,28 +1117,26 @@ static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
 }
 
 /* put_char et all */
-static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
+static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 {
        struct isi_port *port = tty->driver_data;
        struct isi_board *card = port->card;
        unsigned long flags;
 
        if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
-               return;
-
-       if (!port->xmit_buf)
-               return;
+               return 0;
 
        spin_lock_irqsave(&card->card_lock, flags);
        if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
                spin_unlock_irqrestore(&card->card_lock, flags);
-               return;
+               return 0;
        }
 
-       port->xmit_buf[port->xmit_head++] = ch;
+       port->port.xmit_buf[port->xmit_head++] = ch;
        port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
        port->xmit_cnt++;
        spin_unlock_irqrestore(&card->card_lock, flags);
+       return 1;
 }
 
 /* flush_chars et all */
@@ -1158,7 +1148,7 @@ static void isicom_flush_chars(struct tty_struct *tty)
                return;
 
        if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
-                       !port->xmit_buf)
+                       !port->port.xmit_buf)
                return;
 
        /* this tells the transmitter to consider this port for
@@ -1191,14 +1181,17 @@ static int isicom_chars_in_buffer(struct tty_struct *tty)
 }
 
 /* ioctl et all */
-static inline void isicom_send_break(struct isi_port *port,
-       unsigned long length)
+static int isicom_send_break(struct tty_struct *tty, int length)
 {
+       struct isi_port *port = tty->driver_data;
        struct isi_board *card = port->card;
        unsigned long base = card->base;
 
+       if (length == -1)
+               return -EOPNOTSUPP;
+
        if (!lock_card(card))
-               return;
+               return -EINVAL;
 
        outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
        outw((length & 0xff) << 8 | 0x00, base);
@@ -1206,6 +1199,7 @@ static inline void isicom_send_break(struct isi_port *port,
        InterruptTheCard(base);
 
        unlock_card(card);
+       return 0;
 }
 
 static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
@@ -1258,22 +1252,25 @@ static int isicom_set_serial_info(struct isi_port *port,
        if (copy_from_user(&newinfo, info, sizeof(newinfo)))
                return -EFAULT;
 
-       reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
+       lock_kernel();
+
+       reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
                (newinfo.flags & ASYNC_SPD_MASK));
 
        if (!capable(CAP_SYS_ADMIN)) {
-               if ((newinfo.close_delay != port->close_delay) ||
-                               (newinfo.closing_wait != port->closing_wait) ||
+               if ((newinfo.close_delay != port->port.close_delay) ||
+                               (newinfo.closing_wait != port->port.closing_wait) ||
                                ((newinfo.flags & ~ASYNC_USR_MASK) !=
-                               (port->flags & ~ASYNC_USR_MASK)))
+                               (port->port.flags & ~ASYNC_USR_MASK))) {
+                       unlock_kernel();
                        return -EPERM;
-               port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
+               }
+               port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
                                (newinfo.flags & ASYNC_USR_MASK));
-       }
-       else {
-               port->close_delay = newinfo.close_delay;
-               port->closing_wait = newinfo.closing_wait;
-               port->flags = ((port->flags & ~ASYNC_FLAGS) |
+       } else {
+               port->port.close_delay = newinfo.close_delay;
+               port->port.closing_wait = newinfo.closing_wait;
+               port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
                                (newinfo.flags & ASYNC_FLAGS));
        }
        if (reconfig_port) {
@@ -1282,6 +1279,7 @@ static int isicom_set_serial_info(struct isi_port *port,
                isicom_config_port(port);
                spin_unlock_irqrestore(&port->card->card_lock, flags);
        }
+       unlock_kernel();
        return 0;
 }
 
@@ -1290,15 +1288,17 @@ static int isicom_get_serial_info(struct isi_port *port,
 {
        struct serial_struct out_info;
 
+       lock_kernel();
        memset(&out_info, 0, sizeof(out_info));
 /*     out_info.type = ? */
        out_info.line = port - isi_ports;
        out_info.port = port->card->base;
        out_info.irq = port->card->irq;
-       out_info.flags = port->flags;
+       out_info.flags = port->port.flags;
 /*     out_info.baud_base = ? */
-       out_info.close_delay = port->close_delay;
-       out_info.closing_wait = port->closing_wait;
+       out_info.close_delay = port->port.close_delay;
+       out_info.closing_wait = port->port.closing_wait;
+       unlock_kernel();
        if (copy_to_user(info, &out_info, sizeof(out_info)))
                return -EFAULT;
        return 0;
@@ -1309,41 +1309,11 @@ static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
 {
        struct isi_port *port = tty->driver_data;
        void __user *argp = (void __user *)arg;
-       int retval;
 
        if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
                return -ENODEV;
 
-       switch(cmd) {
-       case TCSBRK:
-               retval = tty_check_change(tty);
-               if (retval)
-                       return retval;
-               tty_wait_until_sent(tty, 0);
-               if (!arg)
-                       isicom_send_break(port, HZ/4);
-               return 0;
-
-       case TCSBRKP:
-               retval = tty_check_change(tty);
-               if (retval)
-                       return retval;
-               tty_wait_until_sent(tty, 0);
-               isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
-               return 0;
-
-       case TIOCGSOFTCAR:
-               return put_user(C_CLOCAL(tty) ? 1 : 0,
-                               (unsigned long __user *)argp);
-
-       case TIOCSSOFTCAR:
-               if (get_user(arg, (unsigned long __user *) argp))
-                       return -EFAULT;
-               tty->termios->c_cflag =
-                       ((tty->termios->c_cflag & ~CLOCAL) |
-                       (arg ? CLOCAL : 0));
-               return 0;
-
+       switch (cmd) {
        case TIOCGSERIAL:
                return isicom_get_serial_info(port, argp);
 
@@ -1447,28 +1417,12 @@ static void isicom_hangup(struct tty_struct *tty)
        isicom_shutdown_port(port);
        spin_unlock_irqrestore(&port->card->card_lock, flags);
 
-       port->count = 0;
-       port->flags &= ~ASYNC_NORMAL_ACTIVE;
-       port->tty = NULL;
-       wake_up_interruptible(&port->open_wait);
+       port->port.count = 0;
+       port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+       port->port.tty = NULL;
+       wake_up_interruptible(&port->port.open_wait);
 }
 
-/* flush_buffer et all */
-static void isicom_flush_buffer(struct tty_struct *tty)
-{
-       struct isi_port *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);
-       port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
-       spin_unlock_irqrestore(&card->card_lock, flags);
-
-       tty_wakeup(tty);
-}
 
 /*
  * Driver init and deinit functions
@@ -1492,6 +1446,7 @@ static const struct tty_operations isicom_ops = {
        .flush_buffer           = isicom_flush_buffer,
        .tiocmget               = isicom_tiocmget,
        .tiocmset               = isicom_tiocmset,
+       .break_ctl              = isicom_send_break,
 };
 
 static int __devinit reset_card(struct pci_dev *pdev,
@@ -1592,7 +1547,7 @@ static int __devinit load_firmware(struct pci_dev *pdev,
        default:
                dev_err(&pdev->dev, "Unknown signature.\n");
                goto end;
-       }
+       }
 
        retval = request_firmware(&fw, name, &pdev->dev);
        if (retval)
@@ -1620,7 +1575,8 @@ static int __devinit load_firmware(struct pci_dev *pdev,
                if (WaitTillCardIsFree(base))
                        goto errrelfw;
 
-               if ((status = inw(base + 0x4)) != 0) {
+               status = inw(base + 0x4);
+               if (status != 0) {
                        dev_warn(&pdev->dev, "Card%d rejected load header:\n"
                                KERN_WARNING "Address:0x%x\n"
                                KERN_WARNING "Count:0x%x\n"
@@ -1637,12 +1593,13 @@ static int __devinit load_firmware(struct pci_dev *pdev,
                if (WaitTillCardIsFree(base))
                        goto errrelfw;
 
-               if ((status = inw(base + 0x4)) != 0) {
+               status = inw(base + 0x4);
+               if (status != 0) {
                        dev_err(&pdev->dev, "Card%d got out of sync.Card "
                                "Status:0x%x\n", index + 1, status);
                        goto errrelfw;
                }
-       }
+       }
 
 /* XXX: should we test it by reading it back and comparing with original like
  * in load firmware package? */
@@ -1666,7 +1623,8 @@ static int __devinit load_firmware(struct pci_dev *pdev,
                if (WaitTillCardIsFree(base))
                        goto errrelfw;
 
-               if ((status = inw(base + 0x4)) != 0) {
+               status = inw(base + 0x4);
+               if (status != 0) {
                        dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
                                KERN_WARNING "Address:0x%x\n"
                                KERN_WARNING "Count:0x%x\n"
@@ -1699,7 +1657,8 @@ static int __devinit load_firmware(struct pci_dev *pdev,
                if (WaitTillCardIsFree(base))
                        goto errrelfw;
 
-               if ((status = inw(base + 0x4)) != 0) {
+               status = inw(base + 0x4);
+               if (status != 0) {
                        dev_err(&pdev->dev, "Card%d verify got out of sync. "
                                "Card Status:0x%x\n", index + 1, status);
                        goto errrelfw;
@@ -1741,6 +1700,12 @@ static int __devinit isicom_probe(struct pci_dev *pdev,
        if (card_count >= BOARD_COUNT)
                goto err;
 
+       retval = pci_enable_device(pdev);
+       if (retval) {
+               dev_err(&pdev->dev, "failed to enable\n");
+               goto err;
+       }
+
        dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
 
        /* allot the first empty slot in the array */
@@ -1764,7 +1729,7 @@ static int __devinit isicom_probe(struct pci_dev *pdev,
                        index + 1);
                retval = -EBUSY;
                goto errdec;
-       }
+       }
 
        retval = request_irq(board->irq, isicom_interrupt,
                        IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
@@ -1795,6 +1760,7 @@ errunrr:
 errdec:
        board->base = 0;
        card_count--;
+       pci_disable_device(pdev);
 err:
        return retval;
 }
@@ -1811,6 +1777,7 @@ static void __devexit isicom_remove(struct pci_dev *pdev)
        pci_release_region(pdev, 3);
        board->base = 0;
        card_count--;
+       pci_disable_device(pdev);
 }
 
 static int __init isicom_init(void)
@@ -1818,21 +1785,20 @@ static int __init isicom_init(void)
        int retval, idx, channel;
        struct isi_port *port;
 
-       for(idx = 0; idx < BOARD_COUNT; idx++) {
+       for (idx = 0; idx < BOARD_COUNT; idx++) {
                port = &isi_ports[idx * 16];
                isi_card[idx].ports = port;
                spin_lock_init(&isi_card[idx].card_lock);
                for (channel = 0; channel < 16; channel++, port++) {
+                       tty_port_init(&port->port);
                        port->magic = ISICOM_MAGIC;
                        port->card = &isi_card[idx];
                        port->channel = channel;
-                       port->close_delay = 50 * HZ/100;
-                       port->closing_wait = 3000 * HZ/100;
+                       port->port.close_delay = 50 * HZ/100;
+                       port->port.closing_wait = 3000 * HZ/100;
                        port->status = 0;
-                       init_waitqueue_head(&port->open_wait);
-                       init_waitqueue_head(&port->close_wait);
                        /*  . . .  */
-               }
+               }
                isi_card[idx].base = 0;
                isi_card[idx].irq = 0;
        }
@@ -1854,7 +1820,7 @@ static int __init isicom_init(void)
        isicom_normal->init_termios.c_cflag     = B9600 | CS8 | CREAD | HUPCL |
                CLOCAL;
        isicom_normal->flags                    = TTY_DRIVER_REAL_RAW |
-               TTY_DRIVER_DYNAMIC_DEV;
+               TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
        tty_set_operations(isicom_normal, &isicom_ops);
 
        retval = tty_register_driver(isicom_normal);