diff options
Diffstat (limited to 'drivers/char/isicom.c')
| -rw-r--r-- | drivers/char/isicom.c | 1951 |
1 files changed, 1951 insertions, 0 deletions
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c new file mode 100644 index 000000000..58ce881b3 --- /dev/null +++ b/drivers/char/isicom.c @@ -0,0 +1,1951 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Original driver code supplied by Multi-Tech + * + * Changes + * 1/9/98 alan@redhat.com Merge to 2.0.x kernel tree + * Obtain and use official major/minors + * Loader switched to a misc device + * (fixed range check bug as a side effect) + * Printk clean up + * 9/12/98 alan@redhat.com Rough port to 2.1.x + */ + +#include <linux/module.h> +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/tty.h> +#include <linux/termios.h> +#include <linux/fs.h> +#include <linux/sched.h> +#include <linux/serial.h> +#include <linux/mm.h> +#include <linux/miscdevice.h> +#include <linux/interrupt.h> +#include <linux/timer.h> +#include <linux/ioport.h> + +#include <asm/segment.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/system.h> + +#include <linux/isicom.h> + +static int isicom_refcount = 0; +static int prev_card = 3; /* start servicing isi_card[0] */ +static struct isi_board * irq_to_board[16] = { NULL, }; +static struct tty_driver isicom_normal, isicom_callout; +static struct tty_struct * isicom_table[PORT_COUNT] = { NULL, }; +static struct termios * isicom_termios[PORT_COUNT] = { NULL, }; +static struct termios * isicom_termios_locked[PORT_COUNT] = { NULL, }; + +static struct isi_board isi_card[BOARD_COUNT]; +static struct isi_port isi_ports[PORT_COUNT]; + +DECLARE_TASK_QUEUE(tq_isicom); + +static struct timer_list tx; +static char re_schedule = 1; +#ifdef ISICOM_DEBUG +static unsigned long tx_count = 0; +#endif + +static int ISILoad_open(struct inode *inode, struct file *filp); +static int ISILoad_release(struct inode *inode, struct file *filp); +static int ISILoad_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); + +static void isicom_tx(unsigned long _data); +static void isicom_start(struct tty_struct * tty); + +static unsigned char * tmp_buf = 0; +static struct semaphore tmp_buf_sem = MUTEX; + +/* baud index mappings from linux defns to isi */ + +static char linuxb_to_isib[] = { + -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, + 18, 19 +}; + +/* + * Firmware loader driver specific routines + * + */ + +static struct file_operations ISILoad_fops = { + NULL, /* lseek */ + NULL, /* read */ + NULL, /* write */ + NULL, /* readdir */ + NULL, /* select */ + ISILoad_ioctl, + NULL, /* mmap */ + ISILoad_open, + NULL, /* flush */ + ISILoad_release, + NULL, /* fsync */ + NULL, /* fasync */ + NULL, /* check_media_change */ + NULL, /* revalidate */ +}; + +struct miscdevice isiloader_device = { + ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops +}; + + +extern inline int WaitTillCardIsFree(unsigned short base) +{ + unsigned long count=0; + while( (!(inw(base+0xe) & 0x1)) && (count++ < 6000000)); + if (inw(base+0xe)&0x1) + return 0; + else + return 1; +} + +static int ISILoad_open(struct inode *inode, struct file *filp) +{ +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISILoad:Firmware loader Opened!!!\n"); +#endif + return 0; +} + +static int ISILoad_release(struct inode *inode, struct file *filp) +{ +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISILoad:Firmware loader Close(Release)d\n",); +#endif + return 0; +} + +static int ISILoad_ioctl(struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg) +{ + unsigned int card, i, j, signature, status; + unsigned short word_count, base; + bin_frame frame; + /* exec_record exec_rec; */ + + if(get_user(card, (int *)arg)) + return -EFAULT; + + if(card < 0 || card >= BOARD_COUNT) + return -ENXIO; + + base=isi_card[card].base; + + if(base==0) + return -ENXIO; /* disabled or not used */ + + switch(cmd) { + case MIOCTL_RESET_CARD: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%x ",card+1,base); + + inw(base+0x8); + + for(i=jiffies+HZ/100;time_before(jiffies, i);); + + outw(0,base+0x8); /* Reset */ + + for(j=1;j<=3;j++) { + for(i=jiffies+HZ;time_before(jiffies, i);); + printk("."); + } + signature=(inw(base+0x4)) & 0xff; + + if (!(inw(base+0xe) & 0x1) || (inw(base+0x2))) { +#ifdef ISICOM_DEBUG + printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe)); +#endif + printk("\nISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base); + return -EIO; + } + + switch(signature) { + case 0xa5: + case 0xbb: + case 0xdd: isi_card[card].port_count = 8; + isi_card[card].shift_count = 12; + break; + + case 0xcc: isi_card[card].port_count = 16; + isi_card[card].shift_count = 11; + break; + + default: printk("ISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base); +#ifdef ISICOM_DEBUG + printk("Sig=0x%x\n",signature); +#endif + return -EIO; + } + printk("-Done\n"); + return put_user(signature,(unsigned int*)arg); + + case MIOCTL_LOAD_FIRMWARE: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if(copy_from_user(&frame, (void *) arg, sizeof(bin_frame))) + return -EFAULT; + + if (WaitTillCardIsFree(base)) + return -EIO; + + outw(0xf0,base); /* start upload sequence */ + outw(0x00,base); + outw((frame.addr), base);/* lsb of adderess */ + + word_count=(frame.count >> 1) + frame.count % 2; + outw(word_count, base); + InterruptTheCard(base); + + for(i=0;i<=0x2f;i++); /* a wee bit of delay */ + + if (WaitTillCardIsFree(base)) + return -EIO; + + if ((status=inw(base+0x4))!=0) { + printk(KERN_WARNING "ISILoad:Card%d rejected load header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n", + card+1, frame.addr, frame.count, status); + return -EIO; + } + outsw(base, (void *) frame.bin_data, word_count); + + InterruptTheCard(base); + + for(i=0;i<=0x0f;i++); /* another wee bit of delay */ + + if (WaitTillCardIsFree(base)) + return -EIO; + + if ((status=inw(base+0x4))!=0) { + printk(KERN_ERR "ISILoad:Card%d got out of sync.Card Status:0x%x\n",card+1, status); + return -EIO; + } + return 0; + + case MIOCTL_READ_FIRMWARE: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if(copy_from_user(&frame, (void *) arg, sizeof(bin_header))) + return -EFAULT; + + if (WaitTillCardIsFree(base)) + return -EIO; + + outw(0xf1,base); /* start download sequence */ + outw(0x00,base); + outw((frame.addr), base);/* lsb of adderess */ + + word_count=(frame.count >> 1) + frame.count % 2; + outw(word_count+1, base); + InterruptTheCard(base); + + for(i=0;i<=0xf;i++); /* a wee bit of delay */ + + if (WaitTillCardIsFree(base)) + return -EIO; + + if ((status=inw(base+0x4))!=0) { + printk(KERN_WARNING "ISILoad:Card%d rejected verify header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n", + card+1, frame.addr, frame.count, status); + return -EIO; + } + + inw(base); + insw(base, frame.bin_data, word_count); + InterruptTheCard(base); + + for(i=0;i<=0x0f;i++); /* another wee bit of delay */ + + if (WaitTillCardIsFree(base)) + return -EIO; + + if ((status=inw(base+0x4))!=0) { + printk(KERN_ERR "ISILoad:Card%d verify got out of sync.Card Status:0x%x\n",card+1, status); + return -EIO; + } + + if(copy_to_user((void *) arg, &frame, sizeof(bin_frame))) + return -EFAULT; + return 0; + + case MIOCTL_XFER_CTRL: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + if (WaitTillCardIsFree(base)) + return -EIO; + + outw(0xf2, base); + outw(0x800, base); + outw(0x0, base); + outw(0x0, base); + InterruptTheCard(base); + + isi_card[card].status |= FIRMWARE_LOADED; + return 0; + + default: +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISILoad: Received Ioctl cmd 0x%x.\n", cmd); +#endif + return -ENOIOCTLCMD; + + } + +} + + +/* + * ISICOM Driver specific routines ... + * + */ + +static inline int isicom_paranoia_check(struct isi_port const * port, kdev_t dev, + const char * routine) +{ +#ifdef ISICOM_DEBUG + static const char * badmagic = + KERN_WARNING "ISICOM: Warning: bad isicom magic for dev %s in %s.\n"; + static const char * badport = + KERN_WARNING "ISICOM: Warning: NULL isicom port for dev %s in %s.\n"; + if (!port) { + printk(badport, kdevname(dev), routine); + return 1; + } + if (port->magic != ISICOM_MAGIC) { + printk(badmagic, kdevname(dev), routine); + return 1; + } +#endif + return 0; +} + +extern inline void schedule_bh(struct isi_port * port) +{ + queue_task(&port->bh_tqueue, &tq_isicom); + mark_bh(ISICOM_BH); +} + +/* Transmitter */ + +static void isicom_tx(unsigned long _data) +{ + short count = (BOARD_COUNT-1), card, base; + short txcount, wait, wrd, residue, word_count, cnt; + struct isi_port * port; + struct tty_struct * tty; + unsigned long flags; + +#ifdef ISICOM_DEBUG + ++tx_count; +#endif + + /* find next active board */ + card = (prev_card + 1) & 0x0003; + while(count-- > 0) { + if (isi_card[card].status & BOARD_ACTIVE) + break; + card = (card + 1) & 0x0003; + } + if (!(isi_card[card].status & BOARD_ACTIVE)) + goto sched_again; + + prev_card = card; + + count = isi_card[card].port_count; + port = isi_card[card].ports; + base = isi_card[card].base; + for (;count > 0;count--, port++) { + /* port not active or tx disabled to force flow control */ + if (!(port->status & ISI_TXOK)) + continue; + + tty = port->tty; + save_flags(flags); cli(); + txcount = MIN(TX_SIZE, port->xmit_cnt); + if ((txcount <= 0) || tty->stopped || tty->hw_stopped) { + restore_flags(flags); + 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 + 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 + continue; + } +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: txing %d bytes, port%d.\n", + txcount, port->channel+1); +#endif + outw((port->channel << isi_card[card].shift_count) | txcount + , base); + residue = NO; + wrd = 0; + while (1) { + cnt = MIN(txcount, (SERIAL_XMIT_SIZE - port->xmit_tail)); + if (residue == YES) { + residue = NO; + if (cnt > 0) { + wrd |= (port->xmit_buf[port->xmit_tail] << 8); + port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); + port->xmit_cnt--; + txcount--; + cnt--; + outw(wrd, base); + } + else { + outw(wrd, base); + break; + } + } + if (cnt <= 0) break; + word_count = cnt >> 1; + outsw(base, port->xmit_buf+port->xmit_tail, word_count); + port->xmit_tail = (port->xmit_tail + (word_count << 1)) & + (SERIAL_XMIT_SIZE - 1); + txcount -= (word_count << 1); + port->xmit_cnt -= (word_count << 1); + if (cnt & 0x0001) { + residue = YES; + wrd = port->xmit_buf[port->xmit_tail]; + port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); + port->xmit_cnt--; + txcount--; + } + } +/* + * Replaced the code below with hopefully a faster loop - sameer + */ + +/* + while (1) { + wrd = port->xmit_buf[port->xmit_tail++]; + port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); + port->xmit_cnt--; + if (--txcount > 0) { + wrd |= (port->xmit_buf[port->xmit_tail++] << 8); + port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); + port->xmit_cnt--; + outw(wrd, base); + if (--txcount <= 0) break; + } + else { + outw(wrd, base); + break; + } + } +*/ + InterruptTheCard(base); + if (port->xmit_cnt <= 0) + port->status &= ~ISI_TXOK; + if (port->xmit_cnt <= WAKEUP_CHARS) + schedule_bh(port); + restore_flags(flags); + } + + /* schedule another tx for hopefully in about 10ms */ +sched_again: + if (!re_schedule) + return; + init_timer(&tx); + tx.expires = jiffies + HZ/100; + tx.data = 0; + tx.function = isicom_tx; + add_timer(&tx); + + return; +} + +/* Interrupt handlers */ + +static void do_isicom_bh(void) +{ + run_task_queue(&tq_isicom); +} + + + +static void isicom_bottomhalf(void * data) +{ + struct isi_port * port = (struct isi_port *) data; + struct tty_struct * tty = port->tty; + + if (!tty) + return; + + if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && + tty->ldisc.write_wakeup) + (tty->ldisc.write_wakeup)(tty); + wake_up_interruptible(&tty->write_wait); +} + +/* main interrupt handler routine */ +static void isicom_interrupt(int irq, void * dev_id, struct pt_regs * regs) +{ + struct isi_board * card; + struct isi_port * port; + struct tty_struct * tty; + unsigned short base, header, word_count, count; + unsigned char channel; + short byte_count; + + card = irq_to_board[irq]; + if (!card || !(card->status & FIRMWARE_LOADED)) { + printk(KERN_DEBUG "ISICOM: interrupt: not handling irq%d!.\n", irq); + return; + } + base = card->base; + + inw(base); /* get the dummy word out */ + 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) { + printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%x): %d(channel) > port_count.\n", + base, channel+1); + ClearInterrupt(base); + return; + } + port = card->ports + channel; + if (!(port->flags & ASYNC_INITIALIZED)) { + ClearInterrupt(base); + return; + } + + tty = port->tty; + + if (header & 0x8000) { /* Status Packet */ + header = inw(base); + switch(header & 0xff) { + case 0: /* Change in EIA signals */ + + if (port->flags & ASYNC_CHECK_CD) { + if (port->status & ISI_DCD) { + if (!(header & ISI_DCD)) { + /* Carrier has been lost */ +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: interrupt: DCD->low.\n"); +#endif + port->status &= ~ISI_DCD; + if (!((port->flags & ASYNC_CALLOUT_ACTIVE) && + (port->flags & ASYNC_CALLOUT_NOHUP))) + queue_task(&port->hangup_tq, + &tq_scheduler); + } + } + else { + if (header & ISI_DCD) { + /* Carrier has been detected */ +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: interrupt: DCD->high.\n"); +#endif + port->status |= ISI_DCD; + wake_up_interruptible(&port->open_wait); + } + } + } + else { + if (header & ISI_DCD) + port->status |= ISI_DCD; + else + port->status &= ~ISI_DCD; + } + + if (port->flags & ASYNC_CTS_FLOW) { + if (port->tty->hw_stopped) { + if (header & ISI_CTS) { + port->tty->hw_stopped = 0; + /* start tx ing */ + port->status |= (ISI_TXOK | ISI_CTS); + schedule_bh(port); + } + } + else { + if (!(header & ISI_CTS)) { + port->tty->hw_stopped = 1; + /* stop tx ing */ + port->status &= ~(ISI_TXOK | ISI_CTS); + } + } + } + else { + if (header & ISI_CTS) + port->status |= ISI_CTS; + else + port->status &= ~ISI_CTS; + } + + if (header & ISI_DSR) + port->status |= ISI_DSR; + else + port->status &= ~ISI_DSR; + + if (header & ISI_RI) + port->status |= ISI_RI; + else + port->status &= ~ISI_RI; + + break; + + case 1: /* Received Break !!! */ + if (tty->flip.count >= TTY_FLIPBUF_SIZE) + break; + *tty->flip.flag_buf_ptr++ = TTY_BREAK; + /* dunno if this is right */ + *tty->flip.char_buf_ptr++ = 0; + tty->flip.count++; + if (port->flags & ASYNC_SAK) + do_SAK(tty); + queue_task(&tty->flip.tqueue, &tq_timer); + break; + + case 2: /* Statistics */ + printk(KERN_DEBUG "ISICOM: isicom_interrupt: stats!!!.\n"); + break; + + default: + printk(KERN_WARNING "ISICOM: Intr: Unknown code in status packet.\n"); + break; + } + } + else { /* Data Packet */ + count = MIN(byte_count, (TTY_FLIPBUF_SIZE - tty->flip.count)); +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: Intr: Can rx %d of %d bytes.\n", + count, byte_count); +#endif + word_count = count >> 1; + insw(base, tty->flip.char_buf_ptr, word_count); + tty->flip.char_buf_ptr += (word_count << 1); + byte_count -= (word_count << 1); + if (count & 0x0001) { + *tty->flip.char_buf_ptr++ = (char)(inw(base) & 0xff); + byte_count -= 2; + } + memset(tty->flip.flag_buf_ptr, 0, count); + tty->flip.flag_buf_ptr += count; + tty->flip.count += count; + + if (byte_count > 0) { + printk(KERN_DEBUG "ISICOM: Intr(0x%x:%d): Flip buffer overflow! dropping bytes...\n", + base, channel+1); + while(byte_count > 0) { /* drain out unread xtra data */ + inw(base); + byte_count -= 2; + } + } + queue_task(&tty->flip.tqueue, &tq_timer); + } + ClearInterrupt(base); + return; +} + + /* 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 = port->channel, shift_count = card->shift_count; + unsigned char flow_ctrl; + + if (!(tty = port->tty) || !tty->termios) + return; + baud = C_BAUD(tty); + if (baud & CBAUDEX) { + baud &= ~CBAUDEX; + + /* if CBAUDEX bit is on and the baud is set to either 50 or 75 + * then the card is programmed for 57.6Kbps or 115Kbps + * respectively. + */ + + if (baud < 1 || baud > 2) + port->tty->termios->c_cflag &= ~CBAUDEX; + else + baud += 15; + } + if (baud == 15) { + + /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set + * by the set_serial_info ioctl ... this is done by + * the 'setserial' utility. + */ + + if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) + baud++; /* 57.6 Kbps */ + if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) + baud +=2; /* 115 Kbps */ + } + if (linuxb_to_isib[baud] == -1) { + /* hang up */ + drop_dtr(port); + return; + } + 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 (C_CLOCAL(tty)) + port->flags &= ~ASYNC_CHECK_CD; + else + port->flags |= ASYNC_CHECK_CD; + + /* flow control settings ...*/ + flow_ctrl = 0; + port->flags &= ~ASYNC_CTS_FLOW; + if (C_CRTSCTS(tty)) { + port->flags |= ASYNC_CTS_FLOW; + flow_ctrl |= ISICOM_CTSRTS; + } + if (I_IXON(tty)) + flow_ctrl |= ISICOM_RESPOND_XONXOFF; + 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); + + /* 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 */ + +extern inline void isicom_setup_board(struct isi_board * bp) +{ + int channel; + struct isi_port * port; + unsigned long flags; + + if (bp->status & BOARD_ACTIVE) + 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 + + bp->status |= BOARD_ACTIVE; + MOD_INC_USE_COUNT; + return; +} + +static int isicom_setup_port(struct isi_port * port) +{ + struct isi_board * card = port->card; + unsigned long flags; + + if (port->flags & ASYNC_INITIALIZED) + return 0; + if (!port->xmit_buf) { + unsigned long page; + + if (!(page = get_free_page(GFP_KERNEL))) + return -ENOMEM; + + if (port->xmit_buf) { + free_page(page); + return -ERESTARTSYS; + } + port->xmit_buf = (unsigned char *) page; + } + save_flags(flags); cli(); + if (port->tty) + clear_bit(TTY_IO_ERROR, &port->tty->flags); + if (port->count == 1) + card->count++; + + port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; + + /* discard any residual data */ + kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX); + + isicom_config_port(port); + port->flags |= ASYNC_INITIALIZED; + + restore_flags(flags); + + return 0; +} + +static int block_til_ready(struct tty_struct * tty, struct file * filp, struct isi_port * port) +{ + int do_clocal = 0, retval; + struct wait_queue wait = { current, NULL }; + + /* block if port is in the process of being closed */ + + if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: block_til_ready: close in progress.\n"); +#endif + interruptible_sleep_on(&port->close_wait); + if (port->flags & ASYNC_HUP_NOTIFY) + return -EAGAIN; + else + return -ERESTARTSYS; + } + + /* trying to open a callout device... check for constraints */ + + if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) { +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: bl_ti_rdy: callout open.\n"); +#endif + if (port->flags & ASYNC_NORMAL_ACTIVE) + return -EBUSY; + if ((port->flags & ASYNC_CALLOUT_ACTIVE) && + (port->flags & ASYNC_SESSION_LOCKOUT) && + (port->session != current->session)) + return -EBUSY; + + if ((port->flags & ASYNC_CALLOUT_ACTIVE) && + (port->flags & ASYNC_PGRP_LOCKOUT) && + (port->pgrp != current->pgrp)) + return -EBUSY; + port->flags |= ASYNC_CALLOUT_ACTIVE; + cli(); + raise_dtr_rts(port); + sti(); + return 0; + } + + /* if non-blocking mode is set ... */ + + if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: block_til_ready: non-block mode.\n"); +#endif + if (port->flags & ASYNC_CALLOUT_ACTIVE) + return -EBUSY; + port->flags |= ASYNC_NORMAL_ACTIVE; + return 0; + } + + if (port->flags & ASYNC_CALLOUT_ACTIVE) { + if (port->normal_termios.c_cflag & CLOCAL) + do_clocal = 1; + } else { + 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(); + port->blocked_open++; +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: block_til_ready: waiting for DCD...\n"); +#endif + while (1) { + cli(); + if (!(port->flags & ASYNC_CALLOUT_ACTIVE)) + raise_dtr_rts(port); + + sti(); + 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_CALLOUT_ACTIVE) && + !(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; + } + schedule(); + } + current->state = TASK_RUNNING; + remove_wait_queue(&port->open_wait, &wait); + if (!tty_hung_up_p(filp)) + port->count++; + port->blocked_open--; + if (retval) + return retval; + port->flags |= ASYNC_NORMAL_ACTIVE; + return 0; +} + +static int isicom_open(struct tty_struct * tty, struct file * filp) +{ + struct isi_port * port; + struct isi_board * card; + unsigned int line, board; + unsigned long flags; + int error; + +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: open start!!!.\n"); +#endif + line = MINOR(tty->device) - tty->driver.minor_start; + +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "line = %d.\n", line); +#endif + + 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 + return -ENODEV; + } + + /* open on higher 8 dev files on a 8 port card !!! */ + if (card->port_count == 8) + if (line > ((board * 16)+7)) { + printk(KERN_ERR "ISICOM: Opened >8 on a 8 port card.\n"); + return -ENODEV; + } + port = &isi_ports[line]; + if (isicom_paranoia_check(port, tty->device, "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; + + if ((port->count == 1) && (port->flags & ASYNC_SPLIT_TERMIOS)) { + if (tty->driver.subtype == SERIAL_TYPE_NORMAL) + *tty->termios = port->normal_termios; + else + *tty->termios = port->callout_termios; + save_flags(flags); cli(); + isicom_config_port(port); + restore_flags(flags); + } + + port->session = current->session; + port->pgrp = current->pgrp; +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: open end!!!.\n"); +#endif + return 0; +} + +/* close et all */ + +extern 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); + } + MOD_DEC_USE_COUNT; +} + +static void isicom_shutdown_port(struct isi_port * port) +{ + struct isi_board * card = port->card; + struct tty_struct * tty; + + if (!(port->flags & ASYNC_INITIALIZED)) + return; + if (port->xmit_buf) { + free_page((unsigned long) port->xmit_buf); + port->xmit_buf = NULL; + } + 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", + card->base, card->count); + card->count = 0; + } + + /* last port was closed , shutdown that boad too */ + if (!card->count) + isicom_shutdown_board(card); +} + +static void isicom_close(struct tty_struct * tty, struct file * filp) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + struct isi_board * card = port->card; + unsigned long flags; + + if (!port) + return; + if (isicom_paranoia_check(port, tty->device, "isicom_close")) + return; + +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: Close start!!!.\n"); +#endif + + save_flags(flags); cli(); + if (tty_hung_up_p(filp)) { + restore_flags(flags); + return; + } + + 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); + port->count = 1; + } + if (--port->count < 0) { + printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count for" + "channel%d = %d", card->base, port->channel, + port->count); + port->count = 0; + } + + if (port->count) { + restore_flags(flags); + return; + } + port->flags |= ASYNC_CLOSING; + /* + * save termios struct since callout and dialin termios may be + * different. + */ + if (port->flags & ASYNC_NORMAL_ACTIVE) + port->normal_termios = *tty->termios; + if (port->flags & ASYNC_CALLOUT_ACTIVE) + port->callout_termios = *tty->termios; + + tty->closing = 1; + 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 */ + if (port->flags & ASYNC_INITIALIZED) { + card->port_status &= ~(1 << port->channel); + outw(card->port_status, card->base + 0x02); + } + isicom_shutdown_port(port); + if (tty->driver.flush_buffer) + tty->driver.flush_buffer(tty); + if (tty->ldisc.flush_buffer) + tty->ldisc.flush_buffer(tty); + tty->closing = 0; + port->tty = 0; + if (port->blocked_open) { + if (port->close_delay) { + current->state = TASK_INTERRUPTIBLE; +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: scheduling until time out.\n"); +#endif + schedule_timeout(port->close_delay); + } + wake_up_interruptible(&port->open_wait); + } + port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE | + ASYNC_CLOSING); + wake_up_interruptible(&port->close_wait); + 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, int from_user, + const unsigned char * buf, int count) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + 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->device, "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); + while(1) { + cli(); + cnt = MIN(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(); + copy_from_user(tmp_buf, buf, cnt); + cli(); + cnt = MIN(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; + restore_flags(flags); +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: isicom_write %d bytes written.\n", total); +#endif + return total; +} + +/* put_char et all */ +static void isicom_put_char(struct tty_struct * tty, unsigned char ch) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + unsigned long flags; + + if (isicom_paranoia_check(port, tty->device, "isicom_put_char")) + return; + + 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); + return; + } + + port->xmit_buf[port->xmit_head++] = ch; + port->xmit_head &= (SERIAL_XMIT_SIZE - 1); + port->xmit_cnt++; + restore_flags(flags); +} + +/* flush_chars et all */ +static void isicom_flush_chars(struct tty_struct * tty) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + + if (isicom_paranoia_check(port, tty->device, "isicom_flush_chars")) + return; + + if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || + !port->xmit_buf) + return; + + /* this tells the transmitter to consider this port for + data output to the card ... that's the best we can do. */ + port->status |= ISI_TXOK; +} + +/* write_room et all */ +static int isicom_write_room(struct tty_struct * tty) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + int free; + if (isicom_paranoia_check(port, tty->device, "isicom_write_room")) + return 0; + + free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; + if (free < 0) + free = 0; + return free; +} + +/* chars_in_buffer et all */ +static int isicom_chars_in_buffer(struct tty_struct * tty) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + if (isicom_paranoia_check(port, tty->device, "isicom_chars_in_buffer")) + return 0; + return port->xmit_cnt; +} + +/* ioctl et all */ +extern 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"); + return; + } + outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); + outw((length & 0xff) << 8 | 0x00, base); + outw((length & 0xff00), base); + InterruptTheCard(base); + restore_flags(flags); +} + +static int isicom_get_modem_info(struct isi_port * port, unsigned int * value) +{ + /* just send the port status */ + unsigned int info; + unsigned short status = port->status; + + info = ((status & ISI_RTS) ? TIOCM_RTS : 0) | + ((status & ISI_DTR) ? TIOCM_DTR : 0) | + ((status & ISI_DCD) ? TIOCM_CAR : 0) | + ((status & ISI_DSR) ? TIOCM_DSR : 0) | + ((status & ISI_CTS) ? TIOCM_CTS : 0) | + ((status & ISI_RI ) ? TIOCM_RI : 0); + put_user(info, (unsigned long *) value); + return 0; +} + +static int isicom_set_modem_info(struct isi_port * port, unsigned int cmd, + unsigned int * value) +{ + unsigned int arg; + unsigned long flags; + + if(get_user(arg, value)) + return -EFAULT; + + save_flags(flags); cli(); + + switch(cmd) { + case TIOCMBIS: + if (arg & TIOCM_RTS) + raise_rts(port); + if (arg & TIOCM_DTR) + raise_dtr(port); + break; + + case TIOCMBIC: + if (arg & TIOCM_RTS) + drop_rts(port); + if (arg & TIOCM_DTR) + drop_dtr(port); + break; + + case TIOCMSET: + if (arg & TIOCM_RTS) + raise_rts(port); + else + drop_rts(port); + + if (arg & TIOCM_DTR) + raise_dtr(port); + else + drop_dtr(port); + break; + + default: + restore_flags(flags); + return -EINVAL; + } + restore_flags(flags); + return 0; +} + +static int isicom_set_serial_info(struct isi_port * port, + struct serial_struct * info) +{ + struct serial_struct newinfo; + unsigned long flags; + int reconfig_port; + + if(copy_from_user(&newinfo, info, sizeof(newinfo))) + return -EFAULT; + + reconfig_port = ((port->flags & ASYNC_SPD_MASK) != + (newinfo.flags & ASYNC_SPD_MASK)); + + if (!suser()) { + if ((newinfo.close_delay != port->close_delay) || + (newinfo.closing_wait != port->closing_wait) || + ((newinfo.flags & ~ASYNC_USR_MASK) != + (port->flags & ~ASYNC_USR_MASK))) + return -EPERM; + port->flags = ((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) | + (newinfo.flags & ASYNC_FLAGS)); + } + if (reconfig_port) { + save_flags(flags); cli(); + isicom_config_port(port); + restore_flags(flags); + } + return 0; +} + +static int isicom_get_serial_info(struct isi_port * port, + struct serial_struct * info) +{ + struct serial_struct out_info; + + 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.baud_base = ? */ + out_info.close_delay = port->close_delay; + out_info.closing_wait = port->closing_wait; + if(copy_to_user(info, &out_info, sizeof(out_info))) + return -EFAULT; + return 0; +} + +static int isicom_ioctl(struct tty_struct * tty, struct file * filp, + unsigned int cmd, unsigned long arg) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + int retval; + + if (isicom_paranoia_check(port, tty->device, "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 *) arg); + + case TIOCSSOFTCAR: + if(get_user(arg, (unsigned long *) arg)) + return -EFAULT; + tty->termios->c_cflag = + ((tty->termios->c_cflag & ~CLOCAL) | + (arg ? CLOCAL : 0)); + return 0; + + case TIOCMGET: + return isicom_get_modem_info(port, (unsigned int*) arg); + + case TIOCMBIS: + case TIOCMBIC: + case TIOCMSET: + return isicom_set_modem_info(port, cmd, + (unsigned int *) arg); + + case TIOCGSERIAL: + return isicom_get_serial_info(port, + (struct serial_struct *) arg); + + case TIOCSSERIAL: + return isicom_set_serial_info(port, + (struct serial_struct *) arg); + + default: + return -ENOIOCTLCMD; + } + return 0; +} + +/* set_termios et all */ +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->device, "isicom_set_termios")) + return; + + if (tty->termios->c_cflag == old_termios->c_cflag && + 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)) { + tty->hw_stopped = 0; + isicom_start(tty); + } +} + +/* throttle et all */ +static void isicom_throttle(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->device, "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 */ +static void isicom_unthrottle(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->device, "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 */ +static void isicom_stop(struct tty_struct * tty) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + + if (isicom_paranoia_check(port, tty->device, "isicom_stop")) + return; + + /* this tells the transmitter not to consider this port for + data output to the card. */ + port->status &= ~ISI_TXOK; +} + +/* start et all */ +static void isicom_start(struct tty_struct * tty) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + + if (isicom_paranoia_check(port, tty->device, "isicom_start")) + return; + + /* this tells the transmitter to consider this port for + data output to the card. */ + port->status |= ISI_TXOK; +} + +/* hangup et all */ +static void do_isicom_hangup(void * data) +{ + struct isi_port * port = (struct isi_port *) data; + struct tty_struct * tty; + + tty = port->tty; + if (!tty) + return; + + tty_hangup(tty); +} + +static void isicom_hangup(struct tty_struct * tty) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + + if (isicom_paranoia_check(port, tty->device, "isicom_hangup")) + return; + + isicom_shutdown_port(port); + port->count = 0; + port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE); + port->tty = 0; + wake_up_interruptible(&port->open_wait); +} + +/* flush_buffer et all */ +static void isicom_flush_buffer(struct tty_struct * tty) +{ + struct isi_port * port = (struct isi_port *) tty->driver_data; + unsigned long flags; + + if (isicom_paranoia_check(port, tty->device, "isicom_flush_buffer")) + return; + + save_flags(flags); cli(); + port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; + restore_flags(flags); + + wake_up_interruptible(&tty->write_wait); + if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && + tty->ldisc.write_wakeup) + (tty->ldisc.write_wakeup)(tty); +} + + +static int register_ioregion(void) +{ + int count, done=0; + for (count=0; count < BOARD_COUNT; count++ ) { + if (isi_card[count].base) { + if (check_region(isi_card[count].base,16)) { + printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x is busy. Card%d will be disabled.\n", + isi_card[count].base,isi_card[count].base+15,count+1); + isi_card[count].base=0; + } + else { + request_region(isi_card[count].base,16,ISICOM_NAME); +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x requested for Card%d.\n",isi_card[count].base,isi_card[count].base+15,count+1); +#endif + done++; + } + } + } + return done; +} + +static void unregister_ioregion(void) +{ + int count; + for (count=0; count < BOARD_COUNT; count++ ) + if (isi_card[count].base) { + release_region(isi_card[count].base,16); +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x released for Card%d.\n",isi_card[count].base,isi_card[count].base+15,count+1); +#endif + } +} + +static int register_drivers(void) +{ + int error; + + /* tty driver structure initialization */ + memset(&isicom_normal, 0, sizeof(struct tty_driver)); + isicom_normal.magic = TTY_DRIVER_MAGIC; + isicom_normal.name = "ttyM"; + isicom_normal.major = ISICOM_NMAJOR; + isicom_normal.minor_start = 0; + isicom_normal.num = PORT_COUNT; + isicom_normal.type = TTY_DRIVER_TYPE_SERIAL; + isicom_normal.subtype = SERIAL_TYPE_NORMAL; + isicom_normal.init_termios = tty_std_termios; + isicom_normal.init_termios.c_cflag = + B9600 | CS8 | CREAD | HUPCL |CLOCAL; + isicom_normal.flags = TTY_DRIVER_REAL_RAW; + isicom_normal.refcount = &isicom_refcount; + + isicom_normal.table = isicom_table; + isicom_normal.termios = isicom_termios; + isicom_normal.termios_locked = isicom_termios_locked; + + isicom_normal.open = isicom_open; + isicom_normal.close = isicom_close; + isicom_normal.write = isicom_write; + isicom_normal.put_char = isicom_put_char; + isicom_normal.flush_chars = isicom_flush_chars; + isicom_normal.write_room = isicom_write_room; + isicom_normal.chars_in_buffer = isicom_chars_in_buffer; + isicom_normal.ioctl = isicom_ioctl; + isicom_normal.set_termios = isicom_set_termios; + isicom_normal.throttle = isicom_throttle; + isicom_normal.unthrottle = isicom_unthrottle; + isicom_normal.stop = isicom_stop; + isicom_normal.start = isicom_start; + isicom_normal.hangup = isicom_hangup; + isicom_normal.flush_buffer = isicom_flush_buffer; + + /* callout device */ + + isicom_callout = isicom_normal; + isicom_callout.name = "cum"; + isicom_callout.major = ISICOM_CMAJOR; + isicom_callout.subtype = SERIAL_TYPE_CALLOUT; + + if ((error=tty_register_driver(&isicom_normal))!=0) { + printk(KERN_DEBUG "ISICOM: Couldn't register the dialin driver, error=%d\n", + error); + return error; + } + if ((error=tty_register_driver(&isicom_callout))!=0) { + tty_unregister_driver(&isicom_normal); + printk(KERN_DEBUG "ISICOM: Couldn't register the callout driver, error=%d\n", + error); + return error; + } + return 0; +} + +static void unregister_drivers(void) +{ + int error; + if ((error=tty_unregister_driver(&isicom_callout))!=0) + printk(KERN_DEBUG "ISICOM: couldn't unregister callout driver error=%d.\n",error); + if (tty_unregister_driver(&isicom_normal)) + printk(KERN_DEBUG "ISICOM: couldn't unregister normal driver error=%d.\n",error); +} + +static int register_isr(void) +{ + int count, done=0; + for (count=0; count < BOARD_COUNT; count++ ) { + if (isi_card[count].base) { + if (request_irq(isi_card[count].irq, isicom_interrupt, SA_INTERRUPT, 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++; + } + } + } + return done; +} + +static void unregister_isr(void) +{ + int count; + for (count=0; count < BOARD_COUNT; count++ ) + if (isi_card[count].base) { + 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 isicom_init(void) +{ + int card, channel, base; + struct isi_port * port; + unsigned long page; + + if (!tmp_buf) { + page = get_free_page(GFP_KERNEL); + if (!page) { +#ifdef ISICOM_DEBUG + printk(KERN_DEBUG "ISICOM: Couldn't allocate page for tmp_buf.\n"); +#else + printk(KERN_ERR "ISICOM: Not enough memory...\n"); +#endif + return 0; + } + tmp_buf = (unsigned char *) page; + } + + if (!register_ioregion()) + { + printk(KERN_ERR "ISICOM: All required I/O space found busy.\n"); + free_page((unsigned long)tmp_buf); + return 0; + } + if (register_drivers()) + { + unregister_ioregion(); + free_page((unsigned long)tmp_buf); + return 0; + } + if (!register_isr()) + { + unregister_drivers(); + /* ioports already uregistered in register_isr */ + free_page((unsigned long)tmp_buf); + return 0; + } + + /* initialize bottom half */ + init_bh(ISICOM_BH, do_isicom_bh); + + + memset(isi_ports, 0, sizeof(isi_ports)); + for (card = 0; card < BOARD_COUNT; card++) { + port = &isi_ports[card * 16]; + isi_card[card].ports = port; + 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->normal_termios = isicom_normal.init_termios; + port->callout_termios = isicom_callout.init_termios; + port->close_delay = 50 * HZ/100; + port->closing_wait = 3000 * HZ/100; + port->hangup_tq.routine = do_isicom_hangup; + port->hangup_tq.data = port; + port->bh_tqueue.routine = isicom_bottomhalf; + port->bh_tqueue.data = port; + port->status = 0; + + /* . . . */ + } + } + + return 1; +} + +/* + * Insmod can set static symbols so keep these static + */ + +static int io[4]; +static int irq[4]; + +MODULE_AUTHOR("MultiTech"); +MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); +MODULE_PARM(io, "1-4i"); +MODULE_PARM_DESC(io, "I/O ports for the cards"); +MODULE_PARM(irq, "1-4i"); +MODULE_PARM_DESC(irq, "Interrupts for the cards"); + +int init_module(void) +{ + int retval, card; + + for(card=0; card < BOARD_COUNT; card++) + { + isi_card[card].base=io[card]; + isi_card[card].irq=irq[card]; + } + + for (card=0 ;card < BOARD_COUNT; card++) { + if (!((isi_card[card].irq==2)||(isi_card[card].irq==3)|| + (isi_card[card].irq==4)||(isi_card[card].irq==5)|| + (isi_card[card].irq==7)||(isi_card[card].irq==10)|| + (isi_card[card].irq==11)||(isi_card[card].irq==12)|| + (isi_card[card].irq==15))) { + + if (isi_card[card].base) { + printk(KERN_ERR "ISICOM: Irq %d unsupported. Disabling Card%d...\n", + isi_card[card].irq, card+1); + isi_card[card].base=0; + } + } + } + + if (!(isi_card[0].base || isi_card[1].base || isi_card[2].base || isi_card[3].base)) { + printk(KERN_ERR "ISICOM: No valid card configuration. Driver cannot be initialized...\n"); + return -EIO; + } + retval=misc_register(&isiloader_device); + if (retval<0) { + printk(KERN_ERR "ISICOM: Unable to register firmware loader driver.\n"); + return -EIO; + } + + if (!isicom_init()) { + if (misc_deregister(&isiloader_device)) + printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n"); + return -EIO; + } + + init_timer(&tx); + tx.expires = jiffies + 1; + tx.data = 0; + tx.function = isicom_tx; + re_schedule = 1; + add_timer(&tx); + + return 0; +} + +void cleanup_module(void) +{ + re_schedule = 0; + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(HZ); + disable_bh(ISICOM_BH); + +#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 (misc_deregister(&isiloader_device)) + printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n"); +} |