patch-2.0.36 linux/drivers/char/isicom.c
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- Lines: 1982
- Date:
Sun Nov 15 10:32:54 1998
- Orig file:
v2.0.35/linux/drivers/char/isicom.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.0.35/linux/drivers/char/isicom.c linux/drivers/char/isicom.c
@@ -0,0 +1,1981 @@
+/*
+ * 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
+ */
+
+/*
+ * Currently ISICOM_BH is hard coded to 16 in isicom.h, cannot
+ * ask the kernel for a free slot as of 2.0.x - sameer
+ */
+
+
+#include <linux/config.h>
+#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/system.h>
+#include <asm/io.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
+unsigned long tx_count = 0;
+#endif
+
+static int ISILoad_open(struct inode *inode, struct file *filp);
+static void 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,
+ 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 void ISILoad_release(struct inode *inode, struct file *filp)
+{
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISILoad:Firmware loader Close(Release)d\n",);
+#endif
+}
+
+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 error, word_count, base;
+ bin_frame frame;
+ /* exec_record exec_rec; */
+
+ /* Added this check to avoid oopses on an ioctl with no
+ * args - sameer
+ */
+ error=verify_area(VERIFY_READ, (void *) arg, sizeof(int));
+ if (error)
+ return error;
+ card=get_user((int *)arg);
+ 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 (!suser())
+ return -EPERM;
+ error=verify_area(VERIFY_WRITE, (void *) arg, sizeof(int));
+ if (error)
+ return error;
+
+ printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%x ",card+1,base);
+
+ inw(base+0x8);
+
+ for(i=jiffies+HZ/100;i>jiffies;);
+
+ outw(0,base+0x8); /* Reset */
+
+ for(j=1;j<=3;j++) {
+ for(i=jiffies+HZ;i>jiffies;);
+ 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");
+ put_user(signature,(unsigned int*)arg);
+ return 0;
+
+ case MIOCTL_LOAD_FIRMWARE:
+ if (!suser())
+ return -EPERM;
+ error=verify_area(VERIFY_READ, (void *) arg, sizeof(bin_frame));
+ if (error)
+ return error;
+
+ memcpy_fromfs(&frame, (void *) arg, sizeof(bin_frame));
+
+ 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 (!suser())
+ return -EPERM;
+ error=verify_area(VERIFY_READ, (void *) arg, sizeof(bin_header));
+ if (error)
+ return error;
+
+ memcpy_fromfs(&frame, (void *) arg, sizeof(bin_header));
+
+ 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;
+ }
+ error=verify_area(VERIFY_WRITE, (void *) arg, sizeof(bin_frame));
+ if (error)
+ return error;
+ memcpy_tofs((void *) arg, &frame, sizeof(bin_frame));
+
+ return 0;
+
+ case MIOCTL_XFER_CTRL:
+ if (!suser())
+ 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_irq_off(&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_irq_off(&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_irq_off(&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_irq_off(&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 (current->signal & ~current->blocked) {
+#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;
+ current->timeout = jiffies + port->close_delay;
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: scheduling until time out.\n");
+#endif
+ schedule();
+ }
+ 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(); */
+ memcpy_fromfs(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;
+
+ arg = get_user(value);
+ 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;
+
+ memcpy_fromfs(&newinfo, info, sizeof(newinfo));
+ 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;
+ memcpy_tofs(info, &out_info, sizeof(out_info));
+ 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, error;
+
+ 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:
+ error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long));
+ if (error)
+ return error;
+ put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg);
+ return 0;
+
+ case TIOCSSOFTCAR:
+ error = verify_area(VERIFY_READ, (void *) arg, sizeof(long));
+ if (error)
+ return error;
+ arg = get_user((unsigned long *) arg);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ return 0;
+
+ case TIOCMGET:
+ error = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(unsigned int));
+ if (error)
+ return error;
+ return isicom_get_modem_info(port, (unsigned int*) arg);
+
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ error = verify_area(VERIFY_READ, (void *) arg,
+ sizeof(unsigned int));
+ if (error)
+ return error;
+ return isicom_set_modem_info(port, cmd,
+ (unsigned int *) arg);
+
+ case TIOCGSERIAL:
+ error = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(struct serial_struct));
+ if (error)
+ return error;
+ return isicom_get_serial_info(port,
+ (struct serial_struct *) arg);
+
+ case TIOCSSERIAL:
+ error = verify_area(VERIFY_READ, (void *) arg,
+ sizeof(struct serial_struct));
+ if (error)
+ return error;
+ 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 ISIBase1=0, ISIBase2=0, ISIBase3=0, ISIBase4=0;
+static int Irq1=0, Irq2=0, Irq3=0, Irq4=0;
+
+int init_module(void)
+{
+ int retval, card;
+
+ isi_card[0].base=ISIBase1;
+ isi_card[1].base=ISIBase2;
+ isi_card[2].base=ISIBase3;
+ isi_card[3].base=ISIBase4;
+
+ isi_card[0].irq=Irq1;
+ isi_card[1].irq=Irq2;
+ isi_card[2].irq=Irq3;
+ isi_card[3].irq=Irq4;
+
+ 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;
+ current->timeout = jiffies + HZ;
+ schedule();
+ 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");
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov