#include <linux/major.h>
#include <linux/wait.h>
#include <linux/device.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/firmware.h>
#include <linux/platform_device.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+static DEFINE_MUTEX(ip2_mutex);
static const struct file_operations ip2mem_proc_fops;
static const struct file_operations ip2_proc_fops;
static int ip2_tiocmget(struct tty_struct *tty, struct file *file);
static int ip2_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
+static int ip2_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount);
static void set_irq(int, int);
static void ip2_interrupt_bh(struct work_struct *work);
.write = ip2_ipl_write,
.unlocked_ioctl = ip2_ipl_ioctl,
.open = ip2_ipl_open,
+ .llseek = noop_llseek,
};
static unsigned long irq_counter;
.hangup = ip2_hangup,
.tiocmget = ip2_tiocmget,
.tiocmset = ip2_tiocmset,
+ .get_icount = ip2_get_icount,
.proc_fops = &ip2_proc_fops,
};
i2ChanStrPtr pCh = DevTable[tty->index];
i2eBordStrPtr pB;
struct async_icount cprev, cnow; /* kernel counter temps */
- struct serial_icounter_struct __user *p_cuser;
int rc = 0;
unsigned long flags;
void __user *argp = (void __user *)arg;
return rc;
break;
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for RI where
- * only 0->1 is counted. The controller is quite capable of counting
- * both, but this done to preserve compatibility with the standard
- * serial driver.
- */
- case TIOCGICOUNT:
- ip2trace (CHANN, ITRC_IOCTL, 11, 1, rc );
-
- write_lock_irqsave(&pB->read_fifo_spinlock, flags);
- cnow = pCh->icount;
- write_unlock_irqrestore(&pB->read_fifo_spinlock, flags);
- p_cuser = argp;
- rc = put_user(cnow.cts, &p_cuser->cts);
- rc = put_user(cnow.dsr, &p_cuser->dsr);
- rc = put_user(cnow.rng, &p_cuser->rng);
- rc = put_user(cnow.dcd, &p_cuser->dcd);
- rc = put_user(cnow.rx, &p_cuser->rx);
- rc = put_user(cnow.tx, &p_cuser->tx);
- rc = put_user(cnow.frame, &p_cuser->frame);
- rc = put_user(cnow.overrun, &p_cuser->overrun);
- rc = put_user(cnow.parity, &p_cuser->parity);
- rc = put_user(cnow.brk, &p_cuser->brk);
- rc = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
- break;
-
/*
* The rest are not supported by this driver. By returning -ENOIOCTLCMD they
* will be passed to the line discipline for it to handle.
return rc;
}
+static int ip2_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ i2ChanStrPtr pCh = DevTable[tty->index];
+ i2eBordStrPtr pB;
+ struct async_icount cnow; /* kernel counter temp */
+ unsigned long flags;
+
+ if ( pCh == NULL )
+ return -ENODEV;
+
+ pB = pCh->pMyBord;
+
+ /*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for RI where
+ * only 0->1 is counted. The controller is quite capable of counting
+ * both, but this done to preserve compatibility with the standard
+ * serial driver.
+ */
+
+ write_lock_irqsave(&pB->read_fifo_spinlock, flags);
+ cnow = pCh->icount;
+ write_unlock_irqrestore(&pB->read_fifo_spinlock, flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
/******************************************************************************/
/* Function: GetSerialInfo() */
/* Parameters: Pointer to channel structure */
printk (KERN_DEBUG "IP2IPL: ioctl cmd %d, arg %ld\n", cmd, arg );
#endif
- lock_kernel();
+ mutex_lock(&ip2_mutex);
switch ( iplminor ) {
case 0: // IPL device
rc = -ENODEV;
break;
}
- unlock_kernel();
+ mutex_unlock(&ip2_mutex);
return rc;
}
#ifdef IP2DEBUG_IPL
printk (KERN_DEBUG "IP2IPL: open\n" );
#endif
- cycle_kernel_lock();
return 0;
}