예제 #1
0
static void
sa1100_rx_chars(struct sa1100_port *sport, struct pt_regs *regs)
{
	struct tty_struct *tty = sport->port.info->tty;
	unsigned int status, ch, flg;

	status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
		 UTSR0_TO_SM(UART_GET_UTSR0(sport));
	while (status & UTSR1_TO_SM(UTSR1_RNE)) {
		ch = UART_GET_CHAR(sport);

		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
			goto ignore_char;
		sport->port.icount.rx++;

		flg = TTY_NORMAL;

		/*
		 * note that the error handling code is
		 * out of the main execution path
		 */
		if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) {
			if (status & UTSR1_TO_SM(UTSR1_PRE))
				sport->port.icount.parity++;
			else if (status & UTSR1_TO_SM(UTSR1_FRE))
				sport->port.icount.frame++;
			if (status & UTSR1_TO_SM(UTSR1_ROR))
				sport->port.icount.overrun++;

			status &= sport->port.read_status_mask;

			if (status & UTSR1_TO_SM(UTSR1_PRE))
				flg = TTY_PARITY;
			else if (status & UTSR1_TO_SM(UTSR1_FRE))
				flg = TTY_FRAME;

#ifdef SUPPORT_SYSRQ
			sport->port.sysrq = 0;
#endif
		}

		if (uart_handle_sysrq_char(&sport->port, ch, regs))
			goto ignore_char;

		uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg);

	ignore_char:
		status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
			 UTSR0_TO_SM(UART_GET_UTSR0(sport));
	}
	tty_flip_buffer_push(tty);
}
예제 #2
0
static void
sa1100_rx_chars(struct sa1100_port *sport)
{
	struct tty_struct *tty = sport->port.state->port.tty;
	unsigned int status, ch, flg;

	status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
		 UTSR0_TO_SM(UART_GET_UTSR0(sport));
	while (status & UTSR1_TO_SM(UTSR1_RNE)) {
		ch = UART_GET_CHAR(sport);

		sport->port.icount.rx++;

		flg = TTY_NORMAL;

		
		if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) {
			if (status & UTSR1_TO_SM(UTSR1_PRE))
				sport->port.icount.parity++;
			else if (status & UTSR1_TO_SM(UTSR1_FRE))
				sport->port.icount.frame++;
			if (status & UTSR1_TO_SM(UTSR1_ROR))
				sport->port.icount.overrun++;

			status &= sport->port.read_status_mask;

			if (status & UTSR1_TO_SM(UTSR1_PRE))
				flg = TTY_PARITY;
			else if (status & UTSR1_TO_SM(UTSR1_FRE))
				flg = TTY_FRAME;

#ifdef SUPPORT_SYSRQ
			sport->port.sysrq = 0;
#endif
		}

		if (uart_handle_sysrq_char(&sport->port, ch))
			goto ignore_char;

		uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg);

	ignore_char:
		status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
			 UTSR0_TO_SM(UART_GET_UTSR0(sport));
	}
	tty_flip_buffer_push(tty);
}
예제 #3
0
/*
 * port locked and interrupts disabled
 */
static void sa1100_start_tx(struct uart_port *port)
{
	struct sa1100_port *sport = (struct sa1100_port *)port;
	u32 utcr3;

	utcr3 = UART_GET_UTCR3(sport);
	sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS);
	UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE);
}
예제 #4
0
/*
 * interrupts may not be disabled on entry
 */
static void sa1100_start_tx(struct uart_port *port, unsigned int tty_start)
{
	struct sa1100_port *sport = (struct sa1100_port *)port;
	unsigned long flags;
	u32 utcr3;

	spin_lock_irqsave(&sport->port.lock, flags);
	utcr3 = UART_GET_UTCR3(sport);
	sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS);
	UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE);
	spin_unlock_irqrestore(&sport->port.lock, flags);
}
예제 #5
0
/*
 * interrupts may not be disabled on entry
 */
static void sa1100_start_tx(struct uart_port *port, u_int nonempty, u_int from_tty)
{
	if (nonempty) {
		unsigned long flags;
		u32 utcr3;

		local_irq_save(flags);
		utcr3 = UART_GET_UTCR3(port);
		port->read_status_mask |= UTSR0_TO_SM(UTSR0_TFS);
		UART_PUT_UTCR3(port, utcr3 | UTCR3_TIE);
		local_irq_restore(flags);
	}
}
예제 #6
0
static void
sa1100_set_termios(struct uart_port *port, struct ktermios *termios,
		   struct ktermios *old)
{
	struct sa1100_port *sport = (struct sa1100_port *)port;
	unsigned long flags;
	unsigned int utcr0, old_utcr3, baud, quot;
	unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;

	/*
	 * We only support CS7 and CS8.
	 */
	while ((termios->c_cflag & CSIZE) != CS7 &&
	       (termios->c_cflag & CSIZE) != CS8) {
		termios->c_cflag &= ~CSIZE;
		termios->c_cflag |= old_csize;
		old_csize = CS8;
	}

	if ((termios->c_cflag & CSIZE) == CS8)
		utcr0 = UTCR0_DSS;
	else
		utcr0 = 0;

	if (termios->c_cflag & CSTOPB)
		utcr0 |= UTCR0_SBS;
	if (termios->c_cflag & PARENB) {
		utcr0 |= UTCR0_PE;
		if (!(termios->c_cflag & PARODD))
			utcr0 |= UTCR0_OES;
	}

	/*
	 * Ask the core to calculate the divisor for us.
	 */
	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); 
	quot = uart_get_divisor(port, baud);

	spin_lock_irqsave(&sport->port.lock, flags);

	sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
	sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
	if (termios->c_iflag & INPCK)
		sport->port.read_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (termios->c_iflag & (BRKINT | PARMRK))
		sport->port.read_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);

	/*
	 * Characters to ignore
	 */
	sport->port.ignore_status_mask = 0;
	if (termios->c_iflag & IGNPAR)
		sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (termios->c_iflag & IGNBRK) {
		sport->port.ignore_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
		/*
		 * If we're ignoring parity and break indicators,
		 * ignore overruns too (for real raw support).
		 */
		if (termios->c_iflag & IGNPAR)
			sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_ROR);
	}

	del_timer_sync(&sport->timer);

	/*
	 * Update the per-port timeout.
	 */
	uart_update_timeout(port, termios->c_cflag, baud);

	/*
	 * disable interrupts and drain transmitter
	 */
	old_utcr3 = UART_GET_UTCR3(sport);
	UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE));

	while (UART_GET_UTSR1(sport) & UTSR1_TBY)
		barrier();

	/* then, disable everything */
	UART_PUT_UTCR3(sport, 0);

	/* set the parity, stop bits and data size */
	UART_PUT_UTCR0(sport, utcr0);

	/* set the baud rate */
	quot -= 1;
	UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8));
	UART_PUT_UTCR2(sport, (quot & 0xff));

	UART_PUT_UTSR0(sport, -1);

	UART_PUT_UTCR3(sport, old_utcr3);

	if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
		sa1100_enable_ms(&sport->port);

	spin_unlock_irqrestore(&sport->port.lock, flags);
}
예제 #7
0
static void
ip3106_set_termios(struct uart_port *port, struct termios *termios,
		   struct termios *old)
{
	struct ip3106_port *sport = (struct ip3106_port *)port;
	unsigned long flags;
	unsigned int lcr_fcr, old_ien, baud, quot;
	unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;

	/*
	 * We only support CS7 and CS8.
	 */
	while ((termios->c_cflag & CSIZE) != CS7 &&
	       (termios->c_cflag & CSIZE) != CS8) {
		termios->c_cflag &= ~CSIZE;
		termios->c_cflag |= old_csize;
		old_csize = CS8;
	}

	if ((termios->c_cflag & CSIZE) == CS8)
		lcr_fcr = IP3106_UART_LCR_8BIT;
	else
		lcr_fcr = 0;

	if (termios->c_cflag & CSTOPB)
		lcr_fcr |= IP3106_UART_LCR_2STOPB;
	if (termios->c_cflag & PARENB) {
		lcr_fcr |= IP3106_UART_LCR_PAREN;
		if (!(termios->c_cflag & PARODD))
			lcr_fcr |= IP3106_UART_LCR_PAREVN;
	}

	/*
	 * Ask the core to calculate the divisor for us.
	 */
	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
	quot = uart_get_divisor(port, baud);

	spin_lock_irqsave(&sport->port.lock, flags);

#if	0	/* REVISIT */
	sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
	sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
	if (termios->c_iflag & INPCK)
		sport->port.read_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (termios->c_iflag & (BRKINT | PARMRK))
		sport->port.read_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);

	/*
	 * Characters to ignore
	 */
	sport->port.ignore_status_mask = 0;
	if (termios->c_iflag & IGNPAR)
		sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (termios->c_iflag & IGNBRK) {
		sport->port.ignore_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
		/*
		 * If we're ignoring parity and break indicators,
		 * ignore overruns too (for real raw support).
		 */
		if (termios->c_iflag & IGNPAR)
			sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_ROR);
	}
#endif

	del_timer_sync(&sport->timer);

	/*
	 * Update the per-port timeout.
	 */
	uart_update_timeout(port, termios->c_cflag, baud);

	/*
	 * disable interrupts and drain transmitter
	 */
	old_ien = serial_in(sport, IP3106_IEN);
	serial_out(sport, IP3106_IEN, old_ien & ~(IP3106_UART_INT_ALLTX |
					IP3106_UART_INT_ALLRX));

	while (serial_in(sport, IP3106_FIFO) & IP3106_UART_FIFO_TXFIFO_STA)
		barrier();

	/* then, disable everything */
	serial_out(sport, IP3106_IEN, 0);

	/* Reset the Rx and Tx FIFOs too */
	lcr_fcr |= IP3106_UART_LCR_TX_RST;
	lcr_fcr |= IP3106_UART_LCR_RX_RST;

	/* set the parity, stop bits and data size */
	serial_out(sport, IP3106_LCR, lcr_fcr);

	/* set the baud rate */
	quot -= 1;
	serial_out(sport, IP3106_BAUD, quot);

	serial_out(sport, IP3106_ICLR, -1);

	serial_out(sport, IP3106_IEN, old_ien);

	if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
		ip3106_enable_ms(&sport->port);

	spin_unlock_irqrestore(&sport->port.lock, flags);
}
예제 #8
0
static void
sa1100_set_termios(struct uart_port *port, struct ktermios *termios,
		   struct ktermios *old)
{
	struct sa1100_port *sport = (struct sa1100_port *)port;
	unsigned long flags;
	unsigned int utcr0, old_utcr3, baud, quot;
	unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;

	
	while ((termios->c_cflag & CSIZE) != CS7 &&
	       (termios->c_cflag & CSIZE) != CS8) {
		termios->c_cflag &= ~CSIZE;
		termios->c_cflag |= old_csize;
		old_csize = CS8;
	}

	if ((termios->c_cflag & CSIZE) == CS8)
		utcr0 = UTCR0_DSS;
	else
		utcr0 = 0;

	if (termios->c_cflag & CSTOPB)
		utcr0 |= UTCR0_SBS;
	if (termios->c_cflag & PARENB) {
		utcr0 |= UTCR0_PE;
		if (!(termios->c_cflag & PARODD))
			utcr0 |= UTCR0_OES;
	}

	
	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); 
	quot = uart_get_divisor(port, baud);

	spin_lock_irqsave(&sport->port.lock, flags);

	sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
	sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
	if (termios->c_iflag & INPCK)
		sport->port.read_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (termios->c_iflag & (BRKINT | PARMRK))
		sport->port.read_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);

	
	sport->port.ignore_status_mask = 0;
	if (termios->c_iflag & IGNPAR)
		sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (termios->c_iflag & IGNBRK) {
		sport->port.ignore_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
		
		if (termios->c_iflag & IGNPAR)
			sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_ROR);
	}

	del_timer_sync(&sport->timer);

	
	uart_update_timeout(port, termios->c_cflag, baud);

	
	old_utcr3 = UART_GET_UTCR3(sport);
	UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE));

	while (UART_GET_UTSR1(sport) & UTSR1_TBY)
		barrier();

	
	UART_PUT_UTCR3(sport, 0);

	
	UART_PUT_UTCR0(sport, utcr0);

	
	quot -= 1;
	UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8));
	UART_PUT_UTCR2(sport, (quot & 0xff));

	UART_PUT_UTSR0(sport, -1);

	UART_PUT_UTCR3(sport, old_utcr3);

	if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
		sa1100_enable_ms(&sport->port);

	spin_unlock_irqrestore(&sport->port.lock, flags);
}
예제 #9
0
static void sa1100_change_speed(struct uart_port *port, unsigned int cflag, unsigned int iflag, unsigned int quot)
{
	struct sa1100_port *sport = (struct sa1100_port *)port;
	unsigned long flags;
	unsigned int utcr0, old_utcr3;

	if ((cflag & CSIZE) == CS8)
		utcr0 = UTCR0_DSS;
	else
		utcr0 = 0;

	if (cflag & CSTOPB)
		utcr0 |= UTCR0_SBS;
	if (cflag & PARENB) {
		utcr0 |= UTCR0_PE;
		if (!(cflag & PARODD))
			utcr0 |= UTCR0_OES;
	}

	spin_lock_irqsave(&sport->port.lock, flags);

	sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
	sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
	if (iflag & INPCK)
		sport->port.read_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (iflag & (BRKINT | PARMRK))
		sport->port.read_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);

	/*
	 * Characters to ignore
	 */
	sport->port.ignore_status_mask = 0;
	if (iflag & IGNPAR)
		sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (iflag & IGNBRK) {
		sport->port.ignore_status_mask |=
				UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
		/*
		 * If we're ignoring parity and break indicators,
		 * ignore overruns too (for real raw support).
		 */
		if (iflag & IGNPAR)
			sport->port.ignore_status_mask |=
				UTSR1_TO_SM(UTSR1_ROR);
	}

	del_timer_sync(&sport->timer);

	/*
	 * disable interrupts and drain transmitter
	 */
	old_utcr3 = UART_GET_UTCR3(sport);
	UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE));

	while (UART_GET_UTSR1(sport) & UTSR1_TBY)
		barrier();

	/* then, disable everything */
	UART_PUT_UTCR3(sport, 0);

	/* set the parity, stop bits and data size */
	UART_PUT_UTCR0(sport, utcr0);

	/* set the baud rate */
	quot -= 1;
	UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8));
	UART_PUT_UTCR2(sport, (quot & 0xff));

	UART_PUT_UTSR0(sport, -1);

	UART_PUT_UTCR3(sport, old_utcr3);

	if (UART_ENABLE_MS(&sport->port, cflag))
		sa1100_enable_ms(&sport->port);

	spin_unlock_irqrestore(&sport->port.lock, flags);
}
예제 #10
0
static void
sa1100_rx_chars(struct sa1100_port *sport, struct pt_regs *regs)
{
	struct tty_struct *tty = sport->port.info->tty;
	unsigned int status, ch, flg, ignored = 0;

	status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
		 UTSR0_TO_SM(UART_GET_UTSR0(sport));
	while (status & UTSR1_TO_SM(UTSR1_RNE)) {
		ch = UART_GET_CHAR(sport);

		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
			goto ignore_char;
		sport->port.icount.rx++;

		flg = TTY_NORMAL;

		/*
		 * note that the error handling code is
		 * out of the main execution path
		 */
		if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR))
			goto handle_error;

		if (uart_handle_sysrq_char(&sport->port, ch, regs))
			goto ignore_char;

	error_return:
		*tty->flip.flag_buf_ptr++ = flg;
		*tty->flip.char_buf_ptr++ = ch;
		tty->flip.count++;
	ignore_char:
		status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
			 UTSR0_TO_SM(UART_GET_UTSR0(sport));
	}
 out:
	tty_flip_buffer_push(tty);
	return;

 handle_error:
	if (status & UTSR1_TO_SM(UTSR1_PRE))
		sport->port.icount.parity++;
	else if (status & UTSR1_TO_SM(UTSR1_FRE))
		sport->port.icount.frame++;
	if (status & UTSR1_TO_SM(UTSR1_ROR))
		sport->port.icount.overrun++;

	if (status & sport->port.ignore_status_mask) {
		if (++ignored > 100)
			goto out;
		goto ignore_char;
	}

	status &= sport->port.read_status_mask;

	if (status & UTSR1_TO_SM(UTSR1_PRE))
		flg = TTY_PARITY;
	else if (status & UTSR1_TO_SM(UTSR1_FRE))
		flg = TTY_FRAME;

	if (status & UTSR1_TO_SM(UTSR1_ROR)) {
		/*
		 * overrun does *not* affect the character
		 * we read from the FIFO
		 */
		*tty->flip.flag_buf_ptr++ = flg;
		*tty->flip.char_buf_ptr++ = ch;
		tty->flip.count++;
		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
			goto ignore_char;
		ch = 0;
		flg = TTY_OVERRUN;
	}
#ifdef SUPPORT_SYSRQ
	sport->port.sysrq = 0;
#endif
	goto error_return;
}
예제 #11
0
static void sa1100_change_speed(struct uart_port *port, u_int cflag, u_int iflag, u_int quot)
{
	unsigned long flags;
	u_int utcr0, old_utcr3;

	/* byte size and parity */
	switch (cflag & CSIZE) {
	case CS7:	utcr0 = 0;		break;
	default:	utcr0 = UTCR0_DSS;	break;
	}
	if (cflag & CSTOPB)
		utcr0 |= UTCR0_SBS;
	if (cflag & PARENB) {
		utcr0 |= UTCR0_PE;
		if (!(cflag & PARODD))
			utcr0 |= UTCR0_OES;
	}

	port->read_status_mask &= UTSR0_TO_SM(UTSR0_TFS);
	port->read_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
	if (iflag & INPCK)
		port->read_status_mask |= UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (iflag & (BRKINT | PARMRK))
		port->read_status_mask |= UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);

	/*
	 * Characters to ignore
	 */
	port->ignore_status_mask = 0;
	if (iflag & IGNPAR)
		port->ignore_status_mask |= UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE);
	if (iflag & IGNBRK) {
		port->ignore_status_mask |= UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB);
		/*
		 * If we're ignoring parity and break indicators,
		 * ignore overruns too (for real raw support).
		 */
		if (iflag & IGNPAR)
			port->ignore_status_mask |= UTSR1_TO_SM(UTSR1_ROR);
	}

	/* first, disable interrupts and drain transmitter */
	local_irq_save(flags);
	old_utcr3 = UART_GET_UTCR3(port);
	UART_PUT_UTCR3(port, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE));
	local_irq_restore(flags);
	while (UART_GET_UTSR1(port) & UTSR1_TBY);

	/* then, disable everything */
	UART_PUT_UTCR3(port, 0);

	/* set the parity, stop bits and data size */
	UART_PUT_UTCR0(port, utcr0);

	/* set the baud rate */
	quot -= 1;
	UART_PUT_UTCR1(port, ((quot & 0xf00) >> 8));
	UART_PUT_UTCR2(port, (quot & 0xff));

	UART_PUT_UTSR0(port, -1);

	UART_PUT_UTCR3(port, old_utcr3);
}