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-rw-r--r--drivers/char/isicom.c2079
1 files changed, 2079 insertions, 0 deletions
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
new file mode 100644
index 000000000000..601c7fccb4cf
--- /dev/null
+++ b/drivers/char/isicom.c
@@ -0,0 +1,2079 @@
+/*
+ * 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
+ *
+ * 10/6/99 sameer Merged the ISA and PCI drivers to
+ * a new unified driver.
+ *
+ * 3/9/99 sameer Added support for ISI4616 cards.
+ *
+ * 16/9/99 sameer We do not force RTS low anymore.
+ * This is to prevent the firmware
+ * from getting confused.
+ *
+ * 26/10/99 sameer Cosmetic changes:The driver now
+ * dumps the Port Count information
+ * along with I/O address and IRQ.
+ *
+ * 13/12/99 sameer Fixed the problem with IRQ sharing.
+ *
+ * 10/5/00 sameer Fixed isicom_shutdown_board()
+ * to not lower DTR on all the ports
+ * when the last port on the card is
+ * closed.
+ *
+ * 10/5/00 sameer Signal mask setup command added
+ * to isicom_setup_port and
+ * isicom_shutdown_port.
+ *
+ * 24/5/00 sameer The driver is now SMP aware.
+ *
+ *
+ * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
+ *
+ *
+ * 03/01/01 anil .s Added support for resetting the
+ * internal modems on ISI cards.
+ *
+ * 08/02/01 anil .s Upgraded the driver for kernel
+ * 2.4.x
+ *
+ * 11/04/01 Kevin Fixed firmware load problem with
+ * ISIHP-4X card
+ *
+ * 30/04/01 anil .s Fixed the remote login through
+ * ISI port problem. Now the link
+ * does not go down before password
+ * prompt.
+ *
+ * 03/05/01 anil .s Fixed the problem with IRQ sharing
+ * among ISI-PCI cards.
+ *
+ * 03/05/01 anil .s Added support to display the version
+ * info during insmod as well as module
+ * listing by lsmod.
+ *
+ * 10/05/01 anil .s Done the modifications to the source
+ * file and Install script so that the
+ * same installation can be used for
+ * 2.2.x and 2.4.x kernel.
+ *
+ * 06/06/01 anil .s Now we drop both dtr and rts during
+ * shutdown_port as well as raise them
+ * during isicom_config_port.
+ *
+ * 09/06/01 acme@conectiva.com.br use capable, not suser, do
+ * restore_flags on failure in
+ * isicom_send_break, verify put_user
+ * result
+ *
+ * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
+ * Baud index extended to 21
+ *
+ * 20/03/03 ranjeeth Made to work for Linux Advanced server.
+ * Taken care of license warning.
+ *
+ * 10/12/03 Ravindra Made to work for Fedora Core 1 of
+ * Red Hat Distribution
+ *
+ * 06/01/05 Alan Cox Merged the ISI and base kernel strands
+ * into a single 2.6 driver
+ *
+ * ***********************************************************
+ *
+ * To use this driver you also need the support package. You
+ * can find this in RPM format on
+ * ftp://ftp.linux.org.uk/pub/linux/alan
+ *
+ * You can find the original tools for this direct from Multitech
+ * ftp://ftp.multitech.com/ISI-Cards/
+ *
+ * Having installed the cards the module options (/etc/modprobe.conf)
+ *
+ * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
+ *
+ * Omit those entries for boards you don't have installed.
+ *
+ * TODO
+ * Hotplug
+ * Merge testing
+ * 64-bit verification
+ */
+
+#include <linux/module.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/delay.h>
+#include <linux/ioport.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include <linux/pci.h>
+
+#include <linux/isicom.h>
+
+static struct pci_device_id isicom_pci_tbl[] = {
+ { VENDOR_ID, 0x2028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2052, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2054, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { VENDOR_ID, 0x2058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
+
+static int prev_card = 3; /* start servicing isi_card[0] */
+static struct tty_driver *isicom_normal;
+
+static struct timer_list tx;
+static char re_schedule = 1;
+#ifdef ISICOM_DEBUG
+static unsigned long tx_count = 0;
+#endif
+
+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;
+static DECLARE_MUTEX(tmp_buf_sem);
+
+/* baud index mappings from linux defns to isi */
+
+static signed char linuxb_to_isib[] = {
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17,
+ 18, 19
+};
+
+struct isi_board {
+ unsigned short base;
+ unsigned char irq;
+ unsigned char port_count;
+ unsigned short status;
+ unsigned short port_status; /* each bit represents a single port */
+ unsigned short shift_count;
+ struct isi_port * ports;
+ signed char count;
+ unsigned char isa;
+ spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
+ unsigned long flags;
+};
+
+struct isi_port {
+ unsigned short magic;
+ unsigned int flags;
+ int count;
+ int blocked_open;
+ int close_delay;
+ unsigned short channel;
+ unsigned short status;
+ unsigned short closing_wait;
+ struct isi_board * card;
+ struct tty_struct * tty;
+ wait_queue_head_t close_wait;
+ wait_queue_head_t open_wait;
+ struct work_struct hangup_tq;
+ struct work_struct bh_tqueue;
+ unsigned char * xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+};
+
+static struct isi_board isi_card[BOARD_COUNT];
+static struct isi_port isi_ports[PORT_COUNT];
+
+/*
+ * Locking functions for card level locking. We need to own both
+ * the kernel lock for the card and have the card in a position that
+ * it wants to talk.
+ */
+
+static int lock_card(struct isi_board *card)
+{
+ char retries;
+ unsigned short base = card->base;
+
+ for (retries = 0; retries < 100; retries++) {
+ spin_lock_irqsave(&card->card_lock, card->flags);
+ if (inw(base + 0xe) & 0x1) {
+ return 1;
+ } else {
+ spin_unlock_irqrestore(&card->card_lock, card->flags);
+ udelay(1000); /* 1ms */
+ }
+ }
+ printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%x)\n", card->base);
+ return 0; /* Failed to aquire the card! */
+}
+
+static int lock_card_at_interrupt(struct isi_board *card)
+{
+ unsigned char retries;
+ unsigned short base = card->base;
+
+ for (retries = 0; retries < 200; retries++) {
+ spin_lock_irqsave(&card->card_lock, card->flags);
+
+ if (inw(base + 0xe) & 0x1)
+ return 1;
+ else
+ spin_unlock_irqrestore(&card->card_lock, card->flags);
+ }
+ /* Failing in interrupt is an acceptable event */
+ return 0; /* Failed to aquire the card! */
+}
+
+static void unlock_card(struct isi_board *card)
+{
+ spin_unlock_irqrestore(&card->card_lock, card->flags);
+}
+
+/*
+ * ISI Card specific ops ...
+ */
+
+static void raise_dtr(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+ unsigned char channel = port->channel;
+
+ if (!lock_card(card))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
+ outw(0x0504, base);
+ InterruptTheCard(base);
+ port->status |= ISI_DTR;
+ unlock_card(card);
+}
+
+static inline void drop_dtr(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+ unsigned char channel = port->channel;
+
+ if (!lock_card(card))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
+ outw(0x0404, base);
+ InterruptTheCard(base);
+ port->status &= ~ISI_DTR;
+ unlock_card(card);
+}
+
+static inline void raise_rts(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+ unsigned char channel = port->channel;
+
+ if (!lock_card(card))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
+ outw(0x0a04, base);
+ InterruptTheCard(base);
+ port->status |= ISI_RTS;
+ unlock_card(card);
+}
+static inline void drop_rts(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+ unsigned char channel = port->channel;
+
+ if (!lock_card(card))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
+ outw(0x0804, base);
+ InterruptTheCard(base);
+ port->status &= ~ISI_RTS;
+ unlock_card(card);
+}
+
+static inline void raise_dtr_rts(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+ unsigned char channel = port->channel;
+
+ if (!lock_card(card))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
+ outw(0x0f04, base);
+ InterruptTheCard(base);
+ port->status |= (ISI_DTR | ISI_RTS);
+ unlock_card(card);
+}
+
+static void drop_dtr_rts(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+ unsigned char channel = port->channel;
+
+ if (!lock_card(card))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
+ outw(0x0c04, base);
+ InterruptTheCard(base);
+ port->status &= ~(ISI_RTS | ISI_DTR);
+ unlock_card(card);
+}
+
+static inline void kill_queue(struct isi_port * port, short queue)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+ unsigned char channel = port->channel;
+
+ if (!lock_card(card))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02 , base);
+ outw((queue << 8) | 0x06, base);
+ InterruptTheCard(base);
+ unlock_card(card);
+}
+
+
+/*
+ * Firmware loader driver specific routines. This needs to mostly die
+ * and be replaced with request_firmware.
+ */
+
+static struct file_operations ISILoad_fops = {
+ .owner = THIS_MODULE,
+ .ioctl = ISILoad_ioctl,
+};
+
+static struct miscdevice isiloader_device = {
+ ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops
+};
+
+
+static 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_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ unsigned int card, i, j, signature, status, portcount = 0;
+ unsigned long t;
+ unsigned short word_count, base;
+ bin_frame frame;
+ void __user *argp = (void __user *)arg;
+ /* exec_record exec_rec; */
+
+ if(get_user(card, (int __user *)argp))
+ 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(t=jiffies+HZ/100;time_before(jiffies, t););
+
+ outw(0,base+0x8); /* Reset */
+
+ for(j=1;j<=3;j++) {
+ for(t=jiffies+HZ;time_before(jiffies, t););
+ printk(".");
+ }
+ signature=(inw(base+0x4)) & 0xff;
+ if (isi_card[card].isa) {
+
+ 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:ISA Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
+ return -EIO;
+ }
+ }
+ else {
+ portcount = inw(base+0x2);
+ if (!(inw(base+0xe) & 0x1) || ((portcount!=0) && (portcount!=4) && (portcount!=8))) {
+#ifdef ISICOM_DEBUG
+ printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
+#endif
+ printk("\nISILoad:PCI 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:
+ if (isi_card[card].isa)
+ isi_card[card].port_count = 8;
+ else {
+ if (portcount == 4)
+ isi_card[card].port_count = 4;
+ else
+ 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 __user *)argp);
+
+ case MIOCTL_LOAD_FIRMWARE:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if(copy_from_user(&frame, argp, 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, argp, 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(argp, &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);
+ outw(0x0, base+0x4); /* for ISI4608 cards */
+
+ 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, char *name,
+ 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, name, routine);
+ return 1;
+ }
+ if (port->magic != ISICOM_MAGIC) {
+ printk(badmagic, name, routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+/*
+ * Transmitter.
+ *
+ * We shovel data into the card buffers on a regular basis. The card
+ * will do the rest of the work for us.
+ */
+
+static void isicom_tx(unsigned long _data)
+{
+ short count = (BOARD_COUNT-1), card, base;
+ short txcount, wrd, residue, word_count, cnt;
+ struct isi_port * port;
+ struct tty_struct * tty;
+
+#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++) {
+ if (!lock_card_at_interrupt(&isi_card[card]))
+ continue;
+ /* port not active or tx disabled to force flow control */
+ if (!(port->flags & ASYNC_INITIALIZED) ||
+ !(port->status & ISI_TXOK))
+ unlock_card(&isi_card[card]);
+ continue;
+
+ tty = port->tty;
+
+
+ if(tty == NULL) {
+ unlock_card(&isi_card[card]);
+ continue;
+ }
+
+ txcount = min_t(short, TX_SIZE, port->xmit_cnt);
+ if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
+ unlock_card(&isi_card[card]);
+ continue;
+ }
+ if (!(inw(base + 0x02) & (1 << port->channel))) {
+ unlock_card(&isi_card[card]);
+ 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_t(int, 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--;
+ }
+ }
+
+ InterruptTheCard(base);
+ if (port->xmit_cnt <= 0)
+ port->status &= ~ISI_TXOK;
+ if (port->xmit_cnt <= WAKEUP_CHARS)
+ schedule_work(&port->bh_tqueue);
+ unlock_card(&isi_card[card]);
+ }
+
+ /* 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 isicom_bottomhalf(void * data)
+{
+ struct isi_port * port = (struct isi_port *) data;
+ struct tty_struct * tty = port->tty;
+
+ if (!tty)
+ return;
+
+ tty_wakeup(tty);
+ wake_up_interruptible(&tty->write_wait);
+}
+
+/*
+ * Main interrupt handler routine
+ */
+
+static irqreturn_t 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 = (struct isi_board *) dev_id;
+
+ if (!card || !(card->status & FIRMWARE_LOADED))
+ return IRQ_NONE;
+
+ base = card->base;
+ spin_lock(&card->card_lock);
+
+ if (card->isa == NO) {
+ /*
+ * disable any interrupts from the PCI card and lower the
+ * interrupt line
+ */
+ outw(0x8000, base+0x04);
+ ClearInterrupt(base);
+ }
+
+ inw(base); /* get the dummy word out */
+ header = inw(base);
+ channel = (header & 0x7800) >> card->shift_count;
+ byte_count = header & 0xff;
+
+ if (channel + 1 > card->port_count) {
+ printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%x): %d(channel) > port_count.\n",
+ base, channel+1);
+ if (card->isa)
+ ClearInterrupt(base);
+ else
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+ port = card->ports + channel;
+ if (!(port->flags & ASYNC_INITIALIZED)) {
+ if (card->isa)
+ ClearInterrupt(base);
+ else
+ outw(0x0000, base+0x04); /* enable interrupts */
+ return IRQ_HANDLED;
+ }
+
+ tty = port->tty;
+ if (tty == NULL) {
+ word_count = byte_count >> 1;
+ while(byte_count > 1) {
+ inw(base);
+ byte_count -= 2;
+ }
+ if (byte_count & 0x01)
+ inw(base);
+ if (card->isa == YES)
+ ClearInterrupt(base);
+ else
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+
+ if (header & 0x8000) { /* Status Packet */
+ header = inw(base);
+ 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;
+ schedule_work(&port->hangup_tq);
+ }
+ }
+ 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_work(&port->bh_tqueue);
+ }
+ }
+ 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;
+ *tty->flip.char_buf_ptr++ = 0;
+ tty->flip.count++;
+ if (port->flags & ASYNC_SAK)
+ do_SAK(tty);
+ schedule_delayed_work(&tty->flip.work, 1);
+ 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_t(unsigned short, 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;
+ }
+ }
+ schedule_delayed_work(&tty->flip.work, 1);
+ }
+ if (card->isa == YES)
+ ClearInterrupt(base);
+ else
+ outw(0x0000, base+0x04); /* enable interrupts */
+ return IRQ_HANDLED;
+}
+
+static void isicom_config_port(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ struct tty_struct * tty;
+ unsigned long baud;
+ unsigned short channel_setup, base = card->base;
+ unsigned short channel = 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);
+
+ if (lock_card(card)) {
+ outw(0x8000 | (channel << shift_count) |0x03, base);
+ outw(linuxb_to_isib[baud] << 8 | 0x03, base);
+ channel_setup = 0;
+ switch(C_CSIZE(tty)) {
+ case CS5:
+ channel_setup |= ISICOM_CS5;
+ break;
+ case CS6:
+ channel_setup |= ISICOM_CS6;
+ break;
+ case CS7:
+ channel_setup |= ISICOM_CS7;
+ break;
+ case CS8:
+ channel_setup |= ISICOM_CS8;
+ break;
+ }
+
+ if (C_CSTOPB(tty))
+ channel_setup |= ISICOM_2SB;
+ if (C_PARENB(tty)) {
+ channel_setup |= ISICOM_EVPAR;
+ if (C_PARODD(tty))
+ channel_setup |= ISICOM_ODPAR;
+ }
+ outw(channel_setup, base);
+ InterruptTheCard(base);
+ unlock_card(card);
+ }
+ if (C_CLOCAL(tty))
+ port->flags &= ~ASYNC_CHECK_CD;
+ else
+ 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;
+
+ if (lock_card(card)) {
+ outw(0x8000 | (channel << shift_count) |0x04, base);
+ outw(flow_ctrl << 8 | 0x05, base);
+ outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
+ InterruptTheCard(base);
+ unlock_card(card);
+ }
+
+ /* rx enabled -> enable port for rx on the card */
+ if (C_CREAD(tty)) {
+ card->port_status |= (1 << channel);
+ outw(card->port_status, base + 0x02);
+ }
+}
+
+/* open et all */
+
+static inline void isicom_setup_board(struct isi_board * bp)
+{
+ int channel;
+ struct isi_port * port;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bp->card_lock, flags);
+ if (bp->status & BOARD_ACTIVE) {
+ spin_unlock_irqrestore(&bp->card_lock, flags);
+ return;
+ }
+ port = bp->ports;
+ bp->status |= BOARD_ACTIVE;
+ spin_unlock_irqrestore(&bp->card_lock, flags);
+ for(channel = 0; channel < bp->port_count; channel++, port++)
+ drop_dtr_rts(port);
+ return;
+}
+
+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_zeroed_page(GFP_KERNEL)))
+ return -ENOMEM;
+
+ if (port->xmit_buf) {
+ free_page(page);
+ return -ERESTARTSYS;
+ }
+ port->xmit_buf = (unsigned char *) page;
+ }
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ 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;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ return 0;
+}
+
+static int block_til_ready(struct tty_struct * tty, struct file * filp, struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ int do_clocal = 0, retval;
+ unsigned long flags;
+ DECLARE_WAITQUEUE(wait, current);
+
+ /* block if port is in the process of being closed */
+
+ if (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;
+ }
+
+ /* 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
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ if (C_CLOCAL(tty))
+ do_clocal = 1;
+
+ /* block waiting for DCD to be asserted, and while
+ callout dev is busy */
+ retval = 0;
+ add_wait_queue(&port->open_wait, &wait);
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (!tty_hung_up_p(filp))
+ port->count--;
+ port->blocked_open++;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ while (1) {
+ raise_dtr_rts(port);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
+ if (port->flags & ASYNC_HUP_NOTIFY)
+ retval = -EAGAIN;
+ else
+ retval = -ERESTARTSYS;
+ break;
+ }
+ if (!(port->flags & ASYNC_CLOSING) &&
+ (do_clocal || (port->status & ISI_DCD))) {
+ break;
+ }
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+ schedule();
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->open_wait, &wait);
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (!tty_hung_up_p(filp))
+ port->count++;
+ port->blocked_open--;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ if (retval)
+ return retval;
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ 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;
+ int error;
+
+ line = tty->index;
+ if (line < 0 || line > PORT_COUNT-1)
+ return -ENODEV;
+ board = BOARD(line);
+ card = &isi_card[board];
+
+ if (!(card->status & FIRMWARE_LOADED))
+ return -ENODEV;
+
+ /* open on a port greater than the port count for the card !!! */
+ if (line > ((board * 16) + card->port_count - 1))
+ return -ENODEV;
+
+ port = &isi_ports[line];
+ if (isicom_paranoia_check(port, tty->name, "isicom_open"))
+ return -ENODEV;
+
+ isicom_setup_board(card);
+
+ port->count++;
+ tty->driver_data = port;
+ port->tty = tty;
+ if ((error = isicom_setup_port(port))!=0)
+ return error;
+ if ((error = block_til_ready(tty, filp, port))!=0)
+ return error;
+
+ return 0;
+}
+
+/* close et all */
+
+static inline void isicom_shutdown_board(struct isi_board * bp)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&bp->card_lock, flags);
+ if (bp->status & BOARD_ACTIVE) {
+ bp->status &= ~BOARD_ACTIVE;
+ }
+ spin_unlock_irqrestore(&bp->card_lock, flags);
+}
+
+static void isicom_shutdown_port(struct isi_port * port)
+{
+ struct isi_board * card = port->card;
+ struct tty_struct * tty;
+ unsigned long flags;
+
+ tty = port->tty;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (!(port->flags & ASYNC_INITIALIZED)) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return;
+ }
+ if (port->xmit_buf) {
+ free_page((unsigned long) port->xmit_buf);
+ port->xmit_buf = NULL;
+ }
+ port->flags &= ~ASYNC_INITIALIZED;
+ /* 3rd October 2000 : Vinayak P Risbud */
+ port->tty = NULL;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ /*Fix done by Anil .S on 30-04-2001
+ remote login through isi port has dtr toggle problem
+ due to which the carrier drops before the password prompt
+ appears on the remote end. Now we drop the dtr only if the
+ HUPCL(Hangup on close) flag is set for the tty*/
+
+ if (C_HUPCL(tty))
+ /* drop dtr on this port */
+ drop_dtr(port);
+
+ /* any other port uninits */
+ if (tty)
+ set_bit(TTY_IO_ERROR, &tty->flags);
+
+ 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(C_HUPCL(tty)) {
+ 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->name, "isicom_close"))
+ return;
+
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: Close start!!!.\n");
+#endif
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (tty_hung_up_p(filp)) {
+ spin_unlock_irqrestore(&card->card_lock, 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) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return;
+ }
+ port->flags |= ASYNC_CLOSING;
+ tty->closing = 1;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent(tty, port->closing_wait);
+ /* indicate to the card that no more data can be received
+ on this port */
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (port->flags & ASYNC_INITIALIZED) {
+ card->port_status &= ~(1 << port->channel);
+ outw(card->port_status, card->base + 0x02);
+ }
+ isicom_shutdown_port(port);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ tty_ldisc_flush(tty);
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ tty->closing = 0;
+
+ if (port->blocked_open) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ if (port->close_delay) {
+#ifdef ISICOM_DEBUG
+ printk(KERN_DEBUG "ISICOM: scheduling until time out.\n");
+#endif
+ msleep_interruptible(jiffies_to_msecs(port->close_delay));
+ }
+ spin_lock_irqsave(&card->card_lock, flags);
+ wake_up_interruptible(&port->open_wait);
+ }
+ port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+ wake_up_interruptible(&port->close_wait);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+/* write et all */
+static int isicom_write(struct tty_struct * tty,
+ const unsigned char * buf, int count)
+{
+ struct isi_port * port = (struct isi_port *) tty->driver_data;
+ struct isi_board * card = port->card;
+ unsigned long flags;
+ int cnt, total = 0;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_write"))
+ return 0;
+
+ if (!tty || !port->xmit_buf || !tmp_buf)
+ return 0;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ while(1) {
+ cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - port->xmit_head));
+ if (cnt <= 0)
+ break;
+
+ memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
+ port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt += cnt;
+ buf += cnt;
+ count -= cnt;
+ total += cnt;
+ }
+ if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
+ port->status |= ISI_TXOK;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ 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;
+ struct isi_board * card = port->card;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
+ return;
+
+ if (!tty || !port->xmit_buf)
+ return;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return;
+ }
+
+ port->xmit_buf[port->xmit_head++] = ch;
+ port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt++;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+/* 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->name, "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->name, "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->name, "isicom_chars_in_buffer"))
+ return 0;
+ return port->xmit_cnt;
+}
+
+/* ioctl et all */
+static inline void isicom_send_break(struct isi_port * port, unsigned long length)
+{
+ struct isi_board * card = port->card;
+ unsigned short base = card->base;
+
+ if(!lock_card(card))
+ return;
+
+ outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
+ outw((length & 0xff) << 8 | 0x00, base);
+ outw((length & 0xff00), base);
+ InterruptTheCard(base);
+
+ unlock_card(card);
+}
+
+static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct isi_port * port = (struct isi_port *) tty->driver_data;
+ /* just send the port status */
+ unsigned short status = port->status;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ return ((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);
+}
+
+static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct isi_port * port = (struct isi_port *) tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ if (set & TIOCM_RTS)
+ raise_rts(port);
+ if (set & TIOCM_DTR)
+ raise_dtr(port);
+
+ if (clear & TIOCM_RTS)
+ drop_rts(port);
+ if (clear & TIOCM_DTR)
+ drop_dtr(port);
+
+ return 0;
+}
+
+static int isicom_set_serial_info(struct isi_port * port,
+ struct serial_struct __user *info)
+{
+ struct serial_struct newinfo;
+ 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 (!capable(CAP_SYS_ADMIN)) {
+ 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) {
+ isicom_config_port(port);
+ }
+ return 0;
+}
+
+static int isicom_get_serial_info(struct isi_port * port,
+ struct serial_struct __user *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;
+ void __user *argp = (void __user *)arg;
+ int retval;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ switch(cmd) {
+ case TCSBRK:
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ tty_wait_until_sent(tty, 0);
+ if (!arg)
+ isicom_send_break(port, HZ/4);
+ return 0;
+
+ case TCSBRKP:
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ tty_wait_until_sent(tty, 0);
+ isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
+ return 0;
+
+ case TIOCGSOFTCAR:
+ return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
+
+ case TIOCSSOFTCAR:
+ if(get_user(arg, (unsigned long __user *) argp))
+ return -EFAULT;
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ return 0;
+
+ case TIOCGSERIAL:
+ return isicom_get_serial_info(port, argp);
+
+ case TIOCSSERIAL:
+ return isicom_set_serial_info(port, argp);
+
+ 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;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
+ return;
+
+ if (tty->termios->c_cflag == old_termios->c_cflag &&
+ tty->termios->c_iflag == old_termios->c_iflag)
+ return;
+
+ isicom_config_port(port);
+
+ 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;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
+ return;
+
+ /* tell the card that this port cannot handle any more data for now */
+ card->port_status &= ~(1 << port->channel);
+ outw(card->port_status, card->base + 0x02);
+}
+
+/* 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;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
+ return;
+
+ /* tell the card that this port is ready to accept more data */
+ card->port_status |= (1 << port->channel);
+ outw(card->port_status, card->base + 0x02);
+}
+
+/* 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->name, "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->name, "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)
+ 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->name, "isicom_hangup"))
+ return;
+
+ isicom_shutdown_port(port);
+ port->count = 0;
+ port->flags &= ~ASYNC_NORMAL_ACTIVE;
+ port->tty = NULL;
+ 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;
+ struct isi_board * card = port->card;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ wake_up_interruptible(&tty->write_wait);
+ tty_wakeup(tty);
+}
+
+
+static int __init register_ioregion(void)
+{
+ int count, done=0;
+ for (count=0; count < BOARD_COUNT; count++ ) {
+ if (isi_card[count].base)
+ if (!request_region(isi_card[count].base,16,ISICOM_NAME)) {
+ 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;
+ done++;
+ }
+ }
+ return done;
+}
+
+static void __exit 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 struct tty_operations isicom_ops = {
+ .open = isicom_open,
+ .close = isicom_close,
+ .write = isicom_write,
+ .put_char = isicom_put_char,
+ .flush_chars = isicom_flush_chars,
+ .write_room = isicom_write_room,
+ .chars_in_buffer = isicom_chars_in_buffer,
+ .ioctl = isicom_ioctl,
+ .set_termios = isicom_set_termios,
+ .throttle = isicom_throttle,
+ .unthrottle = isicom_unthrottle,
+ .stop = isicom_stop,
+ .start = isicom_start,
+ .hangup = isicom_hangup,
+ .flush_buffer = isicom_flush_buffer,
+ .tiocmget = isicom_tiocmget,
+ .tiocmset = isicom_tiocmset,
+};
+
+static int __init register_drivers(void)
+{
+ int error;
+
+ /* tty driver structure initialization */
+ isicom_normal = alloc_tty_driver(PORT_COUNT);
+ if (!isicom_normal)
+ return -ENOMEM;
+
+ isicom_normal->owner = THIS_MODULE;
+ isicom_normal->name = "ttyM";
+ isicom_normal->devfs_name = "isicom/";
+ isicom_normal->major = ISICOM_NMAJOR;
+ isicom_normal->minor_start = 0;
+ 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;
+ tty_set_operations(isicom_normal, &isicom_ops);
+
+ if ((error=tty_register_driver(isicom_normal))!=0) {
+ printk(KERN_DEBUG "ISICOM: Couldn't register the dialin driver, error=%d\n",
+ error);
+ put_tty_driver(isicom_normal);
+ return error;
+ }
+ return 0;
+}
+
+static void __exit unregister_drivers(void)
+{
+ int error = tty_unregister_driver(isicom_normal);
+ if (error)
+ printk(KERN_DEBUG "ISICOM: couldn't unregister normal driver error=%d.\n",error);
+ put_tty_driver(isicom_normal);
+}
+
+static int __init register_isr(void)
+{
+ int count, done=0;
+ unsigned long irqflags;
+
+ for (count=0; count < BOARD_COUNT; count++ ) {
+ if (isi_card[count].base) {
+ irqflags = (isi_card[count].isa == YES) ?
+ SA_INTERRUPT :
+ (SA_INTERRUPT | SA_SHIRQ);
+
+ if (request_irq(isi_card[count].irq,
+ isicom_interrupt,
+ irqflags,
+ ISICOM_NAME, &isi_card[count])) {
+
+ printk(KERN_WARNING "ISICOM: Could not"
+ " install handler at Irq %d."
+ " Card%d will be disabled.\n",
+ isi_card[count].irq, count+1);
+
+ release_region(isi_card[count].base,16);
+ isi_card[count].base=0;
+ }
+ else
+ done++;
+ }
+ }
+ return done;
+}
+
+static void __exit unregister_isr(void)
+{
+ int count;
+
+ for (count=0; count < BOARD_COUNT; count++ ) {
+ if (isi_card[count].base)
+ free_irq(isi_card[count].irq, &isi_card[count]);
+ }
+}
+
+static int __init isicom_init(void)
+{
+ int card, channel, base;
+ struct isi_port * port;
+ unsigned long page;
+
+ if (!tmp_buf) {
+ page = get_zeroed_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;
+ }
+
+ memset(isi_ports, 0, sizeof(isi_ports));
+ for (card = 0; card < BOARD_COUNT; card++) {
+ port = &isi_ports[card * 16];
+ isi_card[card].ports = port;
+ spin_lock_init(&isi_card[card].card_lock);
+ base = isi_card[card].base;
+ for (channel = 0; channel < 16; channel++, port++) {
+ port->magic = ISICOM_MAGIC;
+ port->card = &isi_card[card];
+ port->channel = channel;
+ port->close_delay = 50 * HZ/100;
+ port->closing_wait = 3000 * HZ/100;
+ INIT_WORK(&port->hangup_tq, do_isicom_hangup, port);
+ INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port);
+ port->status = 0;
+ init_waitqueue_head(&port->open_wait);
+ init_waitqueue_head(&port->close_wait);
+ /* . . . */
+ }
+ }
+
+ 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_LICENSE("GPL");
+module_param_array(io, int, NULL, 0);
+MODULE_PARM_DESC(io, "I/O ports for the cards");
+module_param_array(irq, int, NULL, 0);
+MODULE_PARM_DESC(irq, "Interrupts for the cards");
+
+static int __devinit isicom_setup(void)
+{
+ struct pci_dev *dev = NULL;
+ int retval, card, idx, count;
+ unsigned char pciirq;
+ unsigned int ioaddr;
+
+ card = 0;
+ for(idx=0; idx < BOARD_COUNT; idx++) {
+ if (io[idx]) {
+ isi_card[idx].base=io[idx];
+ isi_card[idx].irq=irq[idx];
+ isi_card[idx].isa=YES;
+ card++;
+ }
+ else {
+ isi_card[idx].base = 0;
+ isi_card[idx].irq = 0;
+ }
+ }
+
+ for (idx=0 ;idx < card; idx++) {
+ if (!((isi_card[idx].irq==2)||(isi_card[idx].irq==3)||
+ (isi_card[idx].irq==4)||(isi_card[idx].irq==5)||
+ (isi_card[idx].irq==7)||(isi_card[idx].irq==10)||
+ (isi_card[idx].irq==11)||(isi_card[idx].irq==12)||
+ (isi_card[idx].irq==15))) {
+
+ if (isi_card[idx].base) {
+ printk(KERN_ERR "ISICOM: Irq %d unsupported. Disabling Card%d...\n",
+ isi_card[idx].irq, idx+1);
+ isi_card[idx].base=0;
+ card--;
+ }
+ }
+ }
+
+ if (card < BOARD_COUNT) {
+ for (idx=0; idx < DEVID_COUNT; idx++) {
+ dev = NULL;
+ for (;;){
+ if (!(dev = pci_find_device(VENDOR_ID, isicom_pci_tbl[idx].device, dev)))
+ break;
+ if (card >= BOARD_COUNT)
+ break;
+
+ if (pci_enable_device(dev))
+ break;
+
+ /* found a PCI ISI card! */
+ ioaddr = pci_resource_start (dev, 3); /* i.e at offset 0x1c in the
+ * PCI configuration register
+ * space.
+ */
+ pciirq = dev->irq;
+ printk(KERN_INFO "ISI PCI Card(Device ID 0x%x)\n", isicom_pci_tbl[idx].device);
+ /*
+ * allot the first empty slot in the array
+ */
+ for (count=0; count < BOARD_COUNT; count++) {
+ if (isi_card[count].base == 0) {
+ isi_card[count].base = ioaddr;
+ isi_card[count].irq = pciirq;
+ isi_card[count].isa = NO;
+ card++;
+ break;
+ }
+ }
+ }
+ if (card >= BOARD_COUNT) break;
+ }
+ }
+
+ 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 retval;
+ }
+
+ 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;
+}
+
+static void __exit isicom_exit(void)
+{
+ re_schedule = 0;
+ /* FIXME */
+ msleep(1000);
+ unregister_isr();
+ unregister_drivers();
+ unregister_ioregion();
+ if(tmp_buf)
+ free_page((unsigned long)tmp_buf);
+ if (misc_deregister(&isiloader_device))
+ printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
+}
+
+module_init(isicom_setup);
+module_exit(isicom_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 12:42:01 +0100