/************************************************************************
* Copyright 2003 Digi International (www.digi.com)
*
* Copyright (C) 2004 IBM Corporation. All rights reserved.
*
* 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, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
* Contact Information:
* Scott H Kilau <Scott_Kilau@digi.com>
* Ananda Venkatarman <mansarov@us.ibm.com>
* Modifications:
* 01/19/06: changed jsm_input routine to use the dynamically allocated
* tty_buffer changes. Contributors: Scott Kilau and Ananda V.
***********************************************************************/
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_reg.h>
#include <linux/delay.h> /* For udelay */
#include <linux/pci.h>
#include "jsm.h"
static DECLARE_BITMAP(linemap, MAXLINES);
static void jsm_carrier(struct jsm_channel *ch);
static inline int jsm_get_mstat(struct jsm_channel *ch)
{
unsigned char mstat;
unsigned result;
jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "start\n");
mstat = (ch->ch_mostat | ch->ch_mistat);
result = 0;
if (mstat & UART_MCR_DTR)
result |= TIOCM_DTR;
if (mstat & UART_MCR_RTS)
result |= TIOCM_RTS;
if (mstat & UART_MSR_CTS)
result |= TIOCM_CTS;
if (mstat & UART_MSR_DSR)
result |= TIOCM_DSR;
if (mstat & UART_MSR_RI)
result |= TIOCM_RI;
if (mstat & UART_MSR_DCD)
result |= TIOCM_CD;
jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n");
return result;
}
static unsigned int jsm_tty_tx_empty(struct uart_port *port)
{
return TIOCSER_TEMT;
}
/*
* Return modem signals to ld.
*/
static unsigned int jsm_tty_get_mctrl(struct uart_port *port)
{
int result;
struct jsm_channel *channel = (struct jsm_channel *)port;
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
result = jsm_get_mstat(channel);
if (result < 0)
return -ENXIO;
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
return result;
}
/*
* jsm_set_modem_info()
*
* Set modem signals, called by ld.
*/
static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
struct jsm_channel *channel = (struct jsm_channel *)port;
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
if (mctrl & TIOCM_RTS)
channel->ch_mostat |= UART_MCR_RTS;
else
channel->ch_mostat &= ~UART_MCR_RTS;
if (mctrl & TIOCM_DTR)
channel->ch_mostat |= UART_MCR_DTR;
else
channel->ch_mostat &= ~UART_MCR_DTR;
channel->ch_bd->bd_ops->assert_modem_signals(channel);
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
udelay(10);
}
static void jsm_tty_start_tx(struct uart_port *port)
{
struct jsm_channel *channel = (struct jsm_channel *)port;
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
channel->ch_flags &= ~(CH_STOP);
jsm_tty_write(port);
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
}
static void jsm_tty_stop_tx(struct uart_port *port)
{
struct jsm_channel *channel = (struct jsm_channel *)port;
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
channel->ch_flags |= (CH_STOP);
jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
}
static void jsm_tty_send_xchar(struct uart_port *port, char ch)
{
unsigned long lock_flags;
struct jsm_channel *channel = (struct jsm_channel *)port;
struct ktermios *termios;
spin_lock_irqsave(&port->lock, lock_flags);
termios = port->state->port.tty->termios;
if (ch == termios->c_cc[VSTART])
channel->ch_bd->bd_ops->send_start_character(channel);
if (ch == termios->c_cc[VSTOP])
channel->ch_bd->bd_ops->send_stop_character(channel);
spin_unlock_irqrestore(&port->lock, lock_flags);
}
static void jsm_tty_stop_rx(struct uart_port *port)
{
struct jsm_channel *channel = (struct jsm_channel *