tty: move drivers/serial/ to drivers/tty/serial/

The serial drivers are really just tty drivers, so move them to
drivers/tty/ to make things a bit neater overall.

This is part of the tty/serial driver movement proceedure as proposed by
Arnd Bergmann and approved by everyone involved a number of months ago.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl>
Cc: Michael H. Warfield <mhw@wittsend.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 1808 deletions

diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
deleted file mode 100644
index 3892666b5fbd..000000000000
--- a/drivers/serial/atmel_serial.c
+++ /dev/null
@@ -1,1808 +0,0 @@
-/*
- *  linux/drivers/char/atmel_serial.c
- *
- *  Driver for Atmel AT91 / AT32 Serial ports
- *  Copyright (C) 2003 Rick Bronson
- *
- *  Based on drivers/char/serial_sa1100.c, by Deep Blue Solutions Ltd.
- *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
- *
- *  DMA support added by Chip Coldwell.
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; 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
- *
- */
-#include <linux/module.h>
-#include <linux/tty.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/serial.h>
-#include <linux/clk.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/tty_flip.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <linux/atmel_pdc.h>
-#include <linux/atmel_serial.h>
-#include <linux/uaccess.h>
-
-#include <asm/io.h>
-#include <asm/ioctls.h>
-
-#include <asm/mach/serial_at91.h>
-#include <mach/board.h>
-
-#ifdef CONFIG_ARM
-#include <mach/cpu.h>
-#include <mach/gpio.h>
-#endif
-
-#define PDC_BUFFER_SIZE		512
-/* Revisit: We should calculate this based on the actual port settings */
-#define PDC_RX_TIMEOUT		(3 * 10)		/* 3 bytes */
-
-#if defined(CONFIG_SERIAL_ATMEL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/serial_core.h>
-
-static void atmel_start_rx(struct uart_port *port);
-static void atmel_stop_rx(struct uart_port *port);
-
-#ifdef CONFIG_SERIAL_ATMEL_TTYAT
-
-/* Use device name ttyAT, major 204 and minor 154-169.  This is necessary if we
- * should coexist with the 8250 driver, such as if we have an external 16C550
- * UART. */
-#define SERIAL_ATMEL_MAJOR	204
-#define MINOR_START		154
-#define ATMEL_DEVICENAME	"ttyAT"
-
-#else
-
-/* Use device name ttyS, major 4, minor 64-68.  This is the usual serial port
- * name, but it is legally reserved for the 8250 driver. */
-#define SERIAL_ATMEL_MAJOR	TTY_MAJOR
-#define MINOR_START		64
-#define ATMEL_DEVICENAME	"ttyS"
-
-#endif
-
-#define ATMEL_ISR_PASS_LIMIT	256
-
-/* UART registers. CR is write-only, hence no GET macro */
-#define UART_PUT_CR(port,v)	__raw_writel(v, (port)->membase + ATMEL_US_CR)
-#define UART_GET_MR(port)	__raw_readl((port)->membase + ATMEL_US_MR)
-#define UART_PUT_MR(port,v)	__raw_writel(v, (port)->membase + ATMEL_US_MR)
-#define UART_PUT_IER(port,v)	__raw_writel(v, (port)->membase + ATMEL_US_IER)
-#define UART_PUT_IDR(port,v)	__raw_writel(v, (port)->membase + ATMEL_US_IDR)
-#define UART_GET_IMR(port)	__raw_readl((port)->membase + ATMEL_US_IMR)
-#define UART_GET_CSR(port)	__raw_readl((port)->membase + ATMEL_US_CSR)
-#define UART_GET_CHAR(port)	__raw_readl((port)->membase + ATMEL_US_RHR)
-#define UART_PUT_CHAR(port,v)	__raw_writel(v, (port)->membase + ATMEL_US_THR)
-#define UART_GET_BRGR(port)	__raw_readl((port)->membase + ATMEL_US_BRGR)
-#define UART_PUT_BRGR(port,v)	__raw_writel(v, (port)->membase + ATMEL_US_BRGR)
-#define UART_PUT_RTOR(port,v)	__raw_writel(v, (port)->membase + ATMEL_US_RTOR)
-#define UART_PUT_TTGR(port, v)	__raw_writel(v, (port)->membase + ATMEL_US_TTGR)
-
- /* PDC registers */
-#define UART_PUT_PTCR(port,v)	__raw_writel(v, (port)->membase + ATMEL_PDC_PTCR)
-#define UART_GET_PTSR(port)	__raw_readl((port)->membase + ATMEL_PDC_PTSR)
-
-#define UART_PUT_RPR(port,v)	__raw_writel(v, (port)->membase + ATMEL_PDC_RPR)
-#define UART_GET_RPR(port)	__raw_readl((port)->membase + ATMEL_PDC_RPR)
-#define UART_PUT_RCR(port,v)	__raw_writel(v, (port)->membase + ATMEL_PDC_RCR)
-#define UART_PUT_RNPR(port,v)	__raw_writel(v, (port)->membase + ATMEL_PDC_RNPR)
-#define UART_PUT_RNCR(port,v)	__raw_writel(v, (port)->membase + ATMEL_PDC_RNCR)
-
-#define UART_PUT_TPR(port,v)	__raw_writel(v, (port)->membase + ATMEL_PDC_TPR)
-#define UART_PUT_TCR(port,v)	__raw_writel(v, (port)->membase + ATMEL_PDC_TCR)
-#define UART_GET_TCR(port)	__raw_readl((port)->membase + ATMEL_PDC_TCR)
-
-static int (*atmel_open_hook)(struct uart_port *);
-static void (*atmel_close_hook)(struct uart_port *);
-
-struct atmel_dma_buffer {
-	unsigned char	*buf;
-	dma_addr_t	dma_addr;
-	unsigned int	dma_size;
-	unsigned int	ofs;
-};
-
-struct atmel_uart_char {
-	u16		status;
-	u16		ch;
-};
-
-#define ATMEL_SERIAL_RINGSIZE 1024
-
-/*
- * We wrap our port structure around the generic uart_port.
- */
-struct atmel_uart_port {
-	struct uart_port	uart;		/* uart */
-	struct clk		*clk;		/* uart clock */
-	int			may_wakeup;	/* cached value of device_may_wakeup for times we need to disable it */
-	u32			backup_imr;	/* IMR saved during suspend */
-	int			break_active;	/* break being received */
-
-	short			use_dma_rx;	/* enable PDC receiver */
-	short			pdc_rx_idx;	/* current PDC RX buffer */
-	struct atmel_dma_buffer	pdc_rx[2];	/* PDC receier */
-
-	short			use_dma_tx;	/* enable PDC transmitter */
-	struct atmel_dma_buffer	pdc_tx;		/* PDC transmitter */
-
-	struct tasklet_struct	tasklet;
-	unsigned int		irq_status;
-	unsigned int		irq_status_prev;
-
-	struct circ_buf		rx_ring;
-
-	struct serial_rs485	rs485;		/* rs485 settings */
-	unsigned int		tx_done_mask;
-};
-
-static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
-
-#ifdef SUPPORT_SYSRQ
-static struct console atmel_console;
-#endif
-
-static inline struct atmel_uart_port *
-to_atmel_uart_port(struct uart_port *uart)
-{
-	return container_of(uart, struct atmel_uart_port, uart);
-}
-
-#ifdef CONFIG_SERIAL_ATMEL_PDC
-static bool atmel_use_dma_rx(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	return atmel_port->use_dma_rx;
-}
-
-static bool atmel_use_dma_tx(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	return atmel_port->use_dma_tx;
-}
-#else
-static bool atmel_use_dma_rx(struct uart_port *port)
-{
-	return false;
-}
-
-static bool atmel_use_dma_tx(struct uart_port *port)
-{
-	return false;
-}
-#endif
-
-/* Enable or disable the rs485 support */
-void atmel_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	unsigned int mode;
-
-	spin_lock(&port->lock);
-
-	/* Disable interrupts */
-	UART_PUT_IDR(port, atmel_port->tx_done_mask);
-
-	mode = UART_GET_MR(port);
-
-	/* Resetting serial mode to RS232 (0x0) */
-	mode &= ~ATMEL_US_USMODE;
-
-	atmel_port->rs485 = *rs485conf;
-
-	if (rs485conf->flags & SER_RS485_ENABLED) {
-		dev_dbg(port->dev, "Setting UART to RS485\n");
-		atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
-		if (rs485conf->flags & SER_RS485_RTS_AFTER_SEND)
-			UART_PUT_TTGR(port, rs485conf->delay_rts_after_send);
-		mode |= ATMEL_US_USMODE_RS485;
-	} else {
-		dev_dbg(port->dev, "Setting UART to RS232\n");
-		if (atmel_use_dma_tx(port))
-			atmel_port->tx_done_mask = ATMEL_US_ENDTX |
-				ATMEL_US_TXBUFE;
-		else
-			atmel_port->tx_done_mask = ATMEL_US_TXRDY;
-	}
-	UART_PUT_MR(port, mode);
-
-	/* Enable interrupts */
-	UART_PUT_IER(port, atmel_port->tx_done_mask);
-
-	spin_unlock(&port->lock);
-
-}
-
-/*
- * Return TIOCSER_TEMT when transmitter FIFO and Shift register is empty.
- */
-static u_int atmel_tx_empty(struct uart_port *port)
-{
-	return (UART_GET_CSR(port) & ATMEL_US_TXEMPTY) ? TIOCSER_TEMT : 0;
-}
-
-/*
- * Set state of the modem control output lines
- */
-static void atmel_set_mctrl(struct uart_port *port, u_int mctrl)
-{
-	unsigned int control = 0;
-	unsigned int mode;
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-#ifdef CONFIG_ARCH_AT91RM9200
-	if (cpu_is_at91rm9200()) {
-		/*
-		 * AT91RM9200 Errata #39: RTS0 is not internally connected
-		 * to PA21. We need to drive the pin manually.
-		 */
-		if (port->mapbase == AT91RM9200_BASE_US0) {
-			if (mctrl & TIOCM_RTS)
-				at91_set_gpio_value(AT91_PIN_PA21, 0);
-			else
-				at91_set_gpio_value(AT91_PIN_PA21, 1);
-		}
-	}
-#endif
-
-	if (mctrl & TIOCM_RTS)
-		control |= ATMEL_US_RTSEN;
-	else
-		control |= ATMEL_US_RTSDIS;
-
-	if (mctrl & TIOCM_DTR)
-		control |= ATMEL_US_DTREN;
-	else
-		control |= ATMEL_US_DTRDIS;
-
-	UART_PUT_CR(port, control);
-
-	/* Local loopback mode? */
-	mode = UART_GET_MR(port) & ~ATMEL_US_CHMODE;
-	if (mctrl & TIOCM_LOOP)
-		mode |= ATMEL_US_CHMODE_LOC_LOOP;
-	else
-		mode |= ATMEL_US_CHMODE_NORMAL;
-
-	/* Resetting serial mode to RS232 (0x0) */
-	mode &= ~ATMEL_US_USMODE;
-
-	if (atmel_port->rs485.flags & SER_RS485_ENABLED) {
-		dev_dbg(port->dev, "Setting UART to RS485\n");
-		if (atmel_port->rs485.flags & SER_RS485_RTS_AFTER_SEND)
-			UART_PUT_TTGR(port,
-					atmel_port->rs485.delay_rts_after_send);
-		mode |= ATMEL_US_USMODE_RS485;
-	} else {
-		dev_dbg(port->dev, "Setting UART to RS232\n");
-	}
-	UART_PUT_MR(port, mode);
-}
-
-/*
- * Get state of the modem control input lines
- */
-static u_int atmel_get_mctrl(struct uart_port *port)
-{
-	unsigned int status, ret = 0;
-
-	status = UART_GET_CSR(port);
-
-	/*
-	 * The control signals are active low.
-	 */
-	if (!(status & ATMEL_US_DCD))
-		ret |= TIOCM_CD;
-	if (!(status & ATMEL_US_CTS))
-		ret |= TIOCM_CTS;
-	if (!(status & ATMEL_US_DSR))
-		ret |= TIOCM_DSR;
-	if (!(status & ATMEL_US_RI))
-		ret |= TIOCM_RI;
-
-	return ret;
-}
-
-/*
- * Stop transmitting.
- */
-static void atmel_stop_tx(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (atmel_use_dma_tx(port)) {
-		/* disable PDC transmit */
-		UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
-	}
-	/* Disable interrupts */
-	UART_PUT_IDR(port, atmel_port->tx_done_mask);
-
-	if (atmel_port->rs485.flags & SER_RS485_ENABLED)
-		atmel_start_rx(port);
-}
-
-/*
- * Start transmitting.
- */
-static void atmel_start_tx(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (atmel_use_dma_tx(port)) {
-		if (UART_GET_PTSR(port) & ATMEL_PDC_TXTEN)
-			/* The transmitter is already running.  Yes, we
-			   really need this.*/
-			return;
-
-		if (atmel_port->rs485.flags & SER_RS485_ENABLED)
-			atmel_stop_rx(port);
-
-		/* re-enable PDC transmit */
-		UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
-	}
-	/* Enable interrupts */
-	UART_PUT_IER(port, atmel_port->tx_done_mask);
-}
-
-/*
- * start receiving - port is in process of being opened.
- */
-static void atmel_start_rx(struct uart_port *port)
-{
-	UART_PUT_CR(port, ATMEL_US_RSTSTA);  /* reset status and receiver */
-
-	if (atmel_use_dma_rx(port)) {
-		/* enable PDC controller */
-		UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT |
-			port->read_status_mask);
-		UART_PUT_PTCR(port, ATMEL_PDC_RXTEN);
-	} else {
-		UART_PUT_IER(port, ATMEL_US_RXRDY);
-	}
-}
-
-/*
- * Stop receiving - port is in process of being closed.
- */
-static void atmel_stop_rx(struct uart_port *port)
-{
-	if (atmel_use_dma_rx(port)) {
-		/* disable PDC receive */
-		UART_PUT_PTCR(port, ATMEL_PDC_RXTDIS);
-		UART_PUT_IDR(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT |
-			port->read_status_mask);
-	} else {
-		UART_PUT_IDR(port, ATMEL_US_RXRDY);
-	}
-}
-
-/*
- * Enable modem status interrupts
- */
-static void atmel_enable_ms(struct uart_port *port)
-{
-	UART_PUT_IER(port, ATMEL_US_RIIC | ATMEL_US_DSRIC
-			| ATMEL_US_DCDIC | ATMEL_US_CTSIC);
-}
-
-/*
- * Control the transmission of a break signal
- */
-static void atmel_break_ctl(struct uart_port *port, int break_state)
-{
-	if (break_state != 0)
-		UART_PUT_CR(port, ATMEL_US_STTBRK);	/* start break */
-	else
-		UART_PUT_CR(port, ATMEL_US_STPBRK);	/* stop break */
-}
-
-/*
- * Stores the incoming character in the ring buffer
- */
-static void
-atmel_buffer_rx_char(struct uart_port *port, unsigned int status,
-		     unsigned int ch)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	struct circ_buf *ring = &atmel_port->rx_ring;
-	struct atmel_uart_char *c;
-
-	if (!CIRC_SPACE(ring->head, ring->tail, ATMEL_SERIAL_RINGSIZE))
-		/* Buffer overflow, ignore char */
-		return;
-
-	c = &((struct atmel_uart_char *)ring->buf)[ring->head];
-	c->status	= status;
-	c->ch		= ch;
-
-	/* Make sure the character is stored before we update head. */
-	smp_wmb();
-
-	ring->head = (ring->head + 1) & (ATMEL_SERIAL_RINGSIZE - 1);
-}
-
-/*
- * Deal with parity, framing and overrun errors.
- */
-static void atmel_pdc_rxerr(struct uart_port *port, unsigned int status)
-{
-	/* clear error */
-	UART_PUT_CR(port, ATMEL_US_RSTSTA);
-
-	if (status & ATMEL_US_RXBRK) {
-		/* ignore side-effect */
-		status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME);
-		port->icount.brk++;
-	}
-	if (status & ATMEL_US_PARE)
-		port->icount.parity++;
-	if (status & ATMEL_US_FRAME)
-		port->icount.frame++;
-	if (status & ATMEL_US_OVRE)
-		port->icount.overrun++;
-}
-
-/*
- * Characters received (called from interrupt handler)
- */
-static void atmel_rx_chars(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	unsigned int status, ch;
-
-	status = UART_GET_CSR(port);
-	while (status & ATMEL_US_RXRDY) {
-		ch = UART_GET_CHAR(port);
-
-		/*
-		 * note that the error handling code is
-		 * out of the main execution path
-		 */
-		if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME
-				       | ATMEL_US_OVRE | ATMEL_US_RXBRK)
-			     || atmel_port->break_active)) {
-
-			/* clear error */
-			UART_PUT_CR(port, ATMEL_US_RSTSTA);
-
-			if (status & ATMEL_US_RXBRK
-			    && !atmel_port->break_active) {
-				atmel_port->break_active = 1;
-				UART_PUT_IER(port, ATMEL_US_RXBRK);
-			} else {
-				/*
-				 * This is either the end-of-break
-				 * condition or we've received at
-				 * least one character without RXBRK
-				 * being set. In both cases, the next
-				 * RXBRK will indicate start-of-break.
-				 */
-				UART_PUT_IDR(port, ATMEL_US_RXBRK);
-				status &= ~ATMEL_US_RXBRK;
-				atmel_port->break_active = 0;
-			}
-		}
-
-		atmel_buffer_rx_char(port, status, ch);
-		status = UART_GET_CSR(port);
-	}
-
-	tasklet_schedule(&atmel_port->tasklet);
-}
-
-/*
- * Transmit characters (called from tasklet with TXRDY interrupt
- * disabled)
- */
-static void atmel_tx_chars(struct uart_port *port)
-{
-	struct circ_buf *xmit = &port->state->xmit;
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (port->x_char && UART_GET_CSR(port) & atmel_port->tx_done_mask) {
-		UART_PUT_CHAR(port, port->x_char);
-		port->icount.tx++;
-		port->x_char = 0;
-	}
-	if (uart_circ_empty(xmit) || uart_tx_stopped(port))
-		return;
-
-	while (UART_GET_CSR(port) & atmel_port->tx_done_mask) {
-		UART_PUT_CHAR(port, xmit->buf[xmit->tail]);
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		port->icount.tx++;
-		if (uart_circ_empty(xmit))
-			break;
-	}
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-
-	if (!uart_circ_empty(xmit))
-		/* Enable interrupts */
-		UART_PUT_IER(port, atmel_port->tx_done_mask);
-}
-
-/*
- * receive interrupt handler.
- */
-static void
-atmel_handle_receive(struct uart_port *port, unsigned int pending)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (atmel_use_dma_rx(port)) {
-		/*
-		 * PDC receive. Just schedule the tasklet and let it
-		 * figure out the details.
-		 *
-		 * TODO: We're not handling error flags correctly at
-		 * the moment.
-		 */
-		if (pending & (ATMEL_US_ENDRX | ATMEL_US_TIMEOUT)) {
-			UART_PUT_IDR(port, (ATMEL_US_ENDRX
-						| ATMEL_US_TIMEOUT));
-			tasklet_schedule(&atmel_port->tasklet);
-		}
-
-		if (pending & (ATMEL_US_RXBRK | ATMEL_US_OVRE |
-				ATMEL_US_FRAME | ATMEL_US_PARE))
-			atmel_pdc_rxerr(port, pending);
-	}
-
-	/* Interrupt receive */
-	if (pending & ATMEL_US_RXRDY)
-		atmel_rx_chars(port);
-	else if (pending & ATMEL_US_RXBRK) {
-		/*
-		 * End of break detected. If it came along with a
-		 * character, atmel_rx_chars will handle it.
-		 */
-		UART_PUT_CR(port, ATMEL_US_RSTSTA);
-		UART_PUT_IDR(port, ATMEL_US_RXBRK);
-		atmel_port->break_active = 0;
-	}
-}
-
-/*
- * transmit interrupt handler. (Transmit is IRQF_NODELAY safe)
- */
-static void
-atmel_handle_transmit(struct uart_port *port, unsigned int pending)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (pending & atmel_port->tx_done_mask) {
-		/* Either PDC or interrupt transmission */
-		UART_PUT_IDR(port, atmel_port->tx_done_mask);
-		tasklet_schedule(&atmel_port->tasklet);
-	}
-}
-
-/*
- * status flags interrupt handler.
- */
-static void
-atmel_handle_status(struct uart_port *port, unsigned int pending,
-		    unsigned int status)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (pending & (ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC
-				| ATMEL_US_CTSIC)) {
-		atmel_port->irq_status = status;
-		tasklet_schedule(&atmel_port->tasklet);
-	}
-}
-
-/*
- * Interrupt handler
- */
-static irqreturn_t atmel_interrupt(int irq, void *dev_id)
-{
-	struct uart_port *port = dev_id;
-	unsigned int status, pending, pass_counter = 0;
-
-	do {
-		status = UART_GET_CSR(port);
-		pending = status & UART_GET_IMR(port);
-		if (!pending)
-			break;
-
-		atmel_handle_receive(port, pending);
-		atmel_handle_status(port, pending, status);
-		atmel_handle_transmit(port, pending);
-	} while (pass_counter++ < ATMEL_ISR_PASS_LIMIT);
-
-	return pass_counter ? IRQ_HANDLED : IRQ_NONE;
-}
-
-/*
- * Called from tasklet with ENDTX and TXBUFE interrupts disabled.
- */
-static void atmel_tx_dma(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	struct circ_buf *xmit = &port->state->xmit;
-	struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
-	int count;
-
-	/* nothing left to transmit? */
-	if (UART_GET_TCR(port))
-		return;
-
-	xmit->tail += pdc->ofs;
-	xmit->tail &= UART_XMIT_SIZE - 1;
-
-	port->icount.tx += pdc->ofs;
-	pdc->ofs = 0;
-
-	/* more to transmit - setup next transfer */
-
-	/* disable PDC transmit */
-	UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
-
-	if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
-		dma_sync_single_for_device(port->dev,
-					   pdc->dma_addr,
-					   pdc->dma_size,
-					   DMA_TO_DEVICE);
-
-		count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
-		pdc->ofs = count;
-
-		UART_PUT_TPR(port, pdc->dma_addr + xmit->tail);
-		UART_PUT_TCR(port, count);
-		/* re-enable PDC transmit */
-		UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
-		/* Enable interrupts */
-		UART_PUT_IER(port, atmel_port->tx_done_mask);
-	} else {
-		if (atmel_port->rs485.flags & SER_RS485_ENABLED) {
-			/* DMA done, stop TX, start RX for RS485 */
-			atmel_start_rx(port);
-		}
-	}
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-}
-
-static void atmel_rx_from_ring(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	struct circ_buf *ring = &atmel_port->rx_ring;
-	unsigned int flg;
-	unsigned int status;
-
-	while (ring->head != ring->tail) {
-		struct atmel_uart_char c;
-
-		/* Make sure c is loaded after head. */
-		smp_rmb();
-
-		c = ((struct atmel_uart_char *)ring->buf)[ring->tail];
-
-		ring->tail = (ring->tail + 1) & (ATMEL_SERIAL_RINGSIZE - 1);
-
-		port->icount.rx++;
-		status = c.status;
-		flg = TTY_NORMAL;
-
-		/*
-		 * note that the error handling code is
-		 * out of the main execution path
-		 */
-		if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME
-				       | ATMEL_US_OVRE | ATMEL_US_RXBRK))) {
-			if (status & ATMEL_US_RXBRK) {
-				/* ignore side-effect */
-				status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME);
-
-				port->icount.brk++;
-				if (uart_handle_break(port))
-					continue;
-			}
-			if (status & ATMEL_US_PARE)
-				port->icount.parity++;
-			if (status & ATMEL_US_FRAME)
-				port->icount.frame++;
-			if (status & ATMEL_US_OVRE)
-				port->icount.overrun++;
-
-			status &= port->read_status_mask;
-
-			if (status & ATMEL_US_RXBRK)
-				flg = TTY_BREAK;
-			else if (status & ATMEL_US_PARE)
-				flg = TTY_PARITY;
-			else if (status & ATMEL_US_FRAME)
-				flg = TTY_FRAME;
-		}
-
-
-		if (uart_handle_sysrq_char(port, c.ch))
-			continue;
-
-		uart_insert_char(port, status, ATMEL_US_OVRE, c.ch, flg);
-	}
-
-	/*
-	 * Drop the lock here since it might end up calling
-	 * uart_start(), which takes the lock.
-	 */
-	spin_unlock(&port->lock);
-	tty_flip_buffer_push(port->state->port.tty);
-	spin_lock(&port->lock);
-}
-
-static void atmel_rx_from_dma(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	struct tty_struct *tty = port->state->port.tty;
-	struct atmel_dma_buffer *pdc;
-	int rx_idx = atmel_port->pdc_rx_idx;
-	unsigned int head;
-	unsigned int tail;
-	unsigned int count;
-
-	do {
-		/* Reset the UART timeout early so that we don't miss one */
-		UART_PUT_CR(port, ATMEL_US_STTTO);
-
-		pdc = &atmel_port->pdc_rx[rx_idx];
-		head = UART_GET_RPR(port) - pdc->dma_addr;
-		tail = pdc->ofs;
-
-		/* If the PDC has switched buffers, RPR won't contain
-		 * any address within the current buffer. Since head
-		 * is unsigned, we just need a one-way comparison to
-		 * find out.
-		 *
-		 * In this case, we just need to consume the entire
-		 * buffer and resubmit it for DMA. This will clear the
-		 * ENDRX bit as well, so that we can safely re-enable
-		 * all interrupts below.
-		 */
-		head = min(head, pdc->dma_size);
-
-		if (likely(head != tail)) {
-			dma_sync_single_for_cpu(port->dev, pdc->dma_addr,
-					pdc->dma_size, DMA_FROM_DEVICE);
-
-			/*
-			 * head will only wrap around when we recycle
-			 * the DMA buffer, and when that happens, we
-			 * explicitly set tail to 0. So head will
-			 * always be greater than tail.
-			 */
-			count = head - tail;
-
-			tty_insert_flip_string(tty, pdc->buf + pdc->ofs, count);
-
-			dma_sync_single_for_device(port->dev, pdc->dma_addr,
-					pdc->dma_size, DMA_FROM_DEVICE);
-
-			port->icount.rx += count;
-			pdc->ofs = head;
-		}
-
-		/*
-		 * If the current buffer is full, we need to check if
-		 * the next one contains any additional data.
-		 */
-		if (head >= pdc->dma_size) {
-			pdc->ofs = 0;
-			UART_PUT_RNPR(port, pdc->dma_addr);
-			UART_PUT_RNCR(port, pdc->dma_size);
-
-			rx_idx = !rx_idx;
-			atmel_port->pdc_rx_idx = rx_idx;
-		}
-	} while (head >= pdc->dma_size);
-
-	/*
-	 * Drop the lock here since it might end up calling
-	 * uart_start(), which takes the lock.
-	 */
-	spin_unlock(&port->lock);
-	tty_flip_buffer_push(tty);
-	spin_lock(&port->lock);
-
-	UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
-}
-
-/*
- * tasklet handling tty stuff outside the interrupt handler.
- */
-static void atmel_tasklet_func(unsigned long data)
-{
-	struct uart_port *port = (struct uart_port *)data;
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	unsigned int status;
-	unsigned int status_change;
-
-	/* The interrupt handler does not take the lock */
-	spin_lock(&port->lock);
-
-	if (atmel_use_dma_tx(port))
-		atmel_tx_dma(port);
-	else
-		atmel_tx_chars(port);
-
-	status = atmel_port->irq_status;
-	status_change = status ^ atmel_port->irq_status_prev;
-
-	if (status_change & (ATMEL_US_RI | ATMEL_US_DSR
-				| ATMEL_US_DCD | ATMEL_US_CTS)) {
-		/* TODO: All reads to CSR will clear these interrupts! */
-		if (status_change & ATMEL_US_RI)
-			port->icount.rng++;
-		if (status_change & ATMEL_US_DSR)
-			port->icount.dsr++;
-		if (status_change & ATMEL_US_DCD)
-			uart_handle_dcd_change(port, !(status & ATMEL_US_DCD));
-		if (status_change & ATMEL_US_CTS)
-			uart_handle_cts_change(port, !(status & ATMEL_US_CTS));
-
-		wake_up_interruptible(&port->state->port.delta_msr_wait);
-
-		atmel_port->irq_status_prev = status;
-	}
-
-	if (atmel_use_dma_rx(port))
-		atmel_rx_from_dma(port);
-	else
-		atmel_rx_from_ring(port);
-
-	spin_unlock(&port->lock);
-}
-
-/*
- * Perform initialization and enable port for reception
- */
-static int atmel_startup(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	struct tty_struct *tty = port->state->port.tty;
-	int retval;
-
-	/*
-	 * Ensure that no interrupts are enabled otherwise when
-	 * request_irq() is called we could get stuck trying to
-	 * handle an unexpected interrupt
-	 */
-	UART_PUT_IDR(port, -1);
-
-	/*
-	 * Allocate the IRQ
-	 */
-	retval = request_irq(port->irq, atmel_interrupt, IRQF_SHARED,
-			tty ? tty->name : "atmel_serial", port);
-	if (retval) {
-		printk("atmel_serial: atmel_startup - Can't get irq\n");
-		return retval;
-	}
-
-	/*
-	 * Initialize DMA (if necessary)
-	 */
-	if (atmel_use_dma_rx(port)) {
-		int i;
-
-		for (i = 0; i < 2; i++) {
-			struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i];
-
-			pdc->buf = kmalloc(PDC_BUFFER_SIZE, GFP_KERNEL);
-			if (pdc->buf == NULL) {
-				if (i != 0) {
-					dma_unmap_single(port->dev,
-						atmel_port->pdc_rx[0].dma_addr,
-						PDC_BUFFER_SIZE,
-						DMA_FROM_DEVICE);
-					kfree(atmel_port->pdc_rx[0].buf);
-				}
-				free_irq(port->irq, port);
-				return -ENOMEM;
-			}
-			pdc->dma_addr = dma_map_single(port->dev,
-						       pdc->buf,
-						       PDC_BUFFER_SIZE,
-						       DMA_FROM_DEVICE);
-			pdc->dma_size = PDC_BUFFER_SIZE;
-			pdc->ofs = 0;
-		}
-
-		atmel_port->pdc_rx_idx = 0;
-
-		UART_PUT_RPR(port, atmel_port->pdc_rx[0].dma_addr);
-		UART_PUT_RCR(port, PDC_BUFFER_SIZE);
-
-		UART_PUT_RNPR(port, atmel_port->pdc_rx[1].dma_addr);
-		UART_PUT_RNCR(port, PDC_BUFFER_SIZE);
-	}
-	if (atmel_use_dma_tx(port)) {
-		struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
-		struct circ_buf *xmit = &port->state->xmit;
-
-		pdc->buf = xmit->buf;
-		pdc->dma_addr = dma_map_single(port->dev,
-					       pdc->buf,
-					       UART_XMIT_SIZE,
-					       DMA_TO_DEVICE);
-		pdc->dma_size = UART_XMIT_SIZE;
-		pdc->ofs = 0;
-	}
-
-	/*
-	 * If there is a specific "open" function (to register
-	 * control line interrupts)
-	 */
-	if (atmel_open_hook) {
-		retval = atmel_open_hook(port);
-		if (retval) {
-			free_irq(port->irq, port);
-			return retval;
-		}
-	}
-
-	/* Save current CSR for comparison in atmel_tasklet_func() */
-	atmel_port->irq_status_prev = UART_GET_CSR(port);
-	atmel_port->irq_status = atmel_port->irq_status_prev;
-
-	/*
-	 * Finally, enable the serial port
-	 */
-	UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
-	/* enable xmit & rcvr */
-	UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
-
-	if (atmel_use_dma_rx(port)) {
-		/* set UART timeout */
-		UART_PUT_RTOR(port, PDC_RX_TIMEOUT);
-		UART_PUT_CR(port, ATMEL_US_STTTO);
-
-		UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
-		/* enable PDC controller */
-		UART_PUT_PTCR(port, ATMEL_PDC_RXTEN);
-	} else {
-		/* enable receive only */
-		UART_PUT_IER(port, ATMEL_US_RXRDY);
-	}
-
-	return 0;
-}
-
-/*
- * Disable the port
- */
-static void atmel_shutdown(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	/*
-	 * Ensure everything is stopped.
-	 */
-	atmel_stop_rx(port);
-	atmel_stop_tx(port);
-
-	/*
-	 * Shut-down the DMA.
-	 */
-	if (atmel_use_dma_rx(port)) {
-		int i;
-
-		for (i = 0; i < 2; i++) {
-			struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i];
-
-			dma_unmap_single(port->dev,
-					 pdc->dma_addr,
-					 pdc->dma_size,
-					 DMA_FROM_DEVICE);
-			kfree(pdc->buf);
-		}
-	}
-	if (atmel_use_dma_tx(port)) {
-		struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
-
-		dma_unmap_single(port->dev,
-				 pdc->dma_addr,
-				 pdc->dma_size,
-				 DMA_TO_DEVICE);
-	}
-
-	/*
-	 * Disable all interrupts, port and break condition.
-	 */
-	UART_PUT_CR(port, ATMEL_US_RSTSTA);
-	UART_PUT_IDR(port, -1);
-
-	/*
-	 * Free the interrupt
-	 */
-	free_irq(port->irq, port);
-
-	/*
-	 * If there is a specific "close" function (to unregister
-	 * control line interrupts)
-	 */
-	if (atmel_close_hook)
-		atmel_close_hook(port);
-}
-
-/*
- * Flush any TX data submitted for DMA. Called when the TX circular
- * buffer is reset.
- */
-static void atmel_flush_buffer(struct uart_port *port)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (atmel_use_dma_tx(port)) {
-		UART_PUT_TCR(port, 0);
-		atmel_port->pdc_tx.ofs = 0;
-	}
-}
-
-/*
- * Power / Clock management.
- */
-static void atmel_serial_pm(struct uart_port *port, unsigned int state,
-			    unsigned int oldstate)
-{
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	switch (state) {
-	case 0:
-		/*
-		 * Enable the peripheral clock for this serial port.
-		 * This is called on uart_open() or a resume event.
-		 */
-		clk_enable(atmel_port->clk);
-
-		/* re-enable interrupts if we disabled some on suspend */
-		UART_PUT_IER(port, atmel_port->backup_imr);
-		break;
-	case 3:
-		/* Back up the interrupt mask and disable all interrupts */
-		atmel_port->backup_imr = UART_GET_IMR(port);
-		UART_PUT_IDR(port, -1);
-
-		/*
-		 * Disable the peripheral clock for this serial port.
-		 * This is called on uart_close() or a suspend event.
-		 */
-		clk_disable(atmel_port->clk);
-		break;
-	default:
-		printk(KERN_ERR "atmel_serial: unknown pm %d\n", state);
-	}
-}
-
-/*
- * Change the port parameters
- */
-static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
-			      struct ktermios *old)
-{
-	unsigned long flags;
-	unsigned int mode, imr, quot, baud;
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	/* Get current mode register */
-	mode = UART_GET_MR(port) & ~(ATMEL_US_USCLKS | ATMEL_US_CHRL
-					| ATMEL_US_NBSTOP | ATMEL_US_PAR
-					| ATMEL_US_USMODE);
-
-	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
-	quot = uart_get_divisor(port, baud);
-
-	if (quot > 65535) {	/* BRGR is 16-bit, so switch to slower clock */
-		quot /= 8;
-		mode |= ATMEL_US_USCLKS_MCK_DIV8;
-	}
-
-	/* byte size */
-	switch (termios->c_cflag & CSIZE) {
-	case CS5:
-		mode |= ATMEL_US_CHRL_5;
-		break;
-	case CS6:
-		mode |= ATMEL_US_CHRL_6;
-		break;
-	case CS7:
-		mode |= ATMEL_US_CHRL_7;
-		break;
-	default:
-		mode |= ATMEL_US_CHRL_8;
-		break;
-	}
-
-	/* stop bits */
-	if (termios->c_cflag & CSTOPB)
-		mode |= ATMEL_US_NBSTOP_2;
-
-	/* parity */
-	if (termios->c_cflag & PARENB) {
-		/* Mark or Space parity */
-		if (termios->c_cflag & CMSPAR) {
-			if (termios->c_cflag & PARODD)
-				mode |= ATMEL_US_PAR_MARK;
-			else
-				mode |= ATMEL_US_PAR_SPACE;
-		} else if (termios->c_cflag & PARODD)
-			mode |= ATMEL_US_PAR_ODD;
-		else
-			mode |= ATMEL_US_PAR_EVEN;
-	} else
-		mode |= ATMEL_US_PAR_NONE;
-
-	/* hardware handshake (RTS/CTS) */
-	if (termios->c_cflag & CRTSCTS)
-		mode |= ATMEL_US_USMODE_HWHS;
-	else
-		mode |= ATMEL_US_USMODE_NORMAL;
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	port->read_status_mask = ATMEL_US_OVRE;
-	if (termios->c_iflag & INPCK)
-		port->read_status_mask |= (ATMEL_US_FRAME | ATMEL_US_PARE);
-	if (termios->c_iflag & (BRKINT | PARMRK))
-		port->read_status_mask |= ATMEL_US_RXBRK;
-
-	if (atmel_use_dma_rx(port))
-		/* need to enable error interrupts */
-		UART_PUT_IER(port, port->read_status_mask);
-
-	/*
-	 * Characters to ignore
-	 */
-	port->ignore_status_mask = 0;
-	if (termios->c_iflag & IGNPAR)
-		port->ignore_status_mask |= (ATMEL_US_FRAME | ATMEL_US_PARE);
-	if (termios->c_iflag & IGNBRK) {
-		port->ignore_status_mask |= ATMEL_US_RXBRK;
-		/*
-		 * If we're ignoring parity and break indicators,
-		 * ignore overruns too (for real raw support).
-		 */
-		if (termios->c_iflag & IGNPAR)
-			port->ignore_status_mask |= ATMEL_US_OVRE;
-	}
-	/* TODO: Ignore all characters if CREAD is set.*/
-
-	/* update the per-port timeout */
-	uart_update_timeout(port, termios->c_cflag, baud);
-
-	/*
-	 * save/disable interrupts. The tty layer will ensure that the
-	 * transmitter is empty if requested by the caller, so there's
-	 * no need to wait for it here.
-	 */
-	imr = UART_GET_IMR(port);
-	UART_PUT_IDR(port, -1);
-
-	/* disable receiver and transmitter */
-	UART_PUT_CR(port, ATMEL_US_TXDIS | ATMEL_US_RXDIS);
-
-	/* Resetting serial mode to RS232 (0x0) */
-	mode &= ~ATMEL_US_USMODE;
-
-	if (atmel_port->rs485.flags & SER_RS485_ENABLED) {
-		dev_dbg(port->dev, "Setting UART to RS485\n");
-		if (atmel_port->rs485.flags & SER_RS485_RTS_AFTER_SEND)
-			UART_PUT_TTGR(port,
-					atmel_port->rs485.delay_rts_after_send);
-		mode |= ATMEL_US_USMODE_RS485;
-	} else {
-		dev_dbg(port->dev, "Setting UART to RS232\n");
-	}
-
-	/* set the parity, stop bits and data size */
-	UART_PUT_MR(port, mode);
-
-	/* set the baud rate */
-	UART_PUT_BRGR(port, quot);
-	UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
-	UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
-
-	/* restore interrupts */
-	UART_PUT_IER(port, imr);
-
-	/* CTS flow-control and modem-status interrupts */
-	if (UART_ENABLE_MS(port, termios->c_cflag))
-		port->ops->enable_ms(port);
-
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/*
- * Return string describing the specified port
- */
-static const char *atmel_type(struct uart_port *port)
-{
-	return (port->type == PORT_ATMEL) ? "ATMEL_SERIAL" : NULL;
-}
-
-/*
- * Release the memory region(s) being used by 'port'.
- */
-static void atmel_release_port(struct uart_port *port)
-{
-	struct platform_device *pdev = to_platform_device(port->dev);
-	int size = pdev->resource[0].end - pdev->resource[0].start + 1;
-
-	release_mem_region(port->mapbase, size);
-
-	if (port->flags & UPF_IOREMAP) {
-		iounmap(port->membase);
-		port->membase = NULL;
-	}
-}
-
-/*
- * Request the memory region(s) being used by 'port'.
- */
-static int atmel_request_port(struct uart_port *port)
-{
-	struct platform_device *pdev = to_platform_device(port->dev);
-	int size = pdev->resource[0].end - pdev->resource[0].start + 1;
-
-	if (!request_mem_region(port->mapbase, size, "atmel_serial"))
-		return -EBUSY;
-
-	if (port->flags & UPF_IOREMAP) {
-		port->membase = ioremap(port->mapbase, size);
-		if (port->membase == NULL) {
-			release_mem_region(port->mapbase, size);
-			return -ENOMEM;
-		}
-	}
-
-	return 0;
-}
-
-/*
- * Configure/autoconfigure the port.
- */
-static void atmel_config_port(struct uart_port *port, int flags)
-{
-	if (flags & UART_CONFIG_TYPE) {
-		port->type = PORT_ATMEL;
-		atmel_request_port(port);
-	}
-}
-
-/*
- * Verify the new serial_struct (for TIOCSSERIAL).
- */
-static int atmel_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
-	int ret = 0;
-	if (ser->type != PORT_UNKNOWN && ser->type != PORT_ATMEL)
-		ret = -EINVAL;
-	if (port->irq != ser->irq)
-		ret = -EINVAL;
-	if (ser->io_type != SERIAL_IO_MEM)
-		ret = -EINVAL;
-	if (port->uartclk / 16 != ser->baud_base)
-		ret = -EINVAL;
-	if ((void *)port->mapbase != ser->iomem_base)
-		ret = -EINVAL;
-	if (port->iobase != ser->port)
-		ret = -EINVAL;
-	if (ser->hub6 != 0)
-		ret = -EINVAL;
-	return ret;
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-static int atmel_poll_get_char(struct uart_port *port)
-{
-	while (!(UART_GET_CSR(port) & ATMEL_US_RXRDY))
-		cpu_relax();
-
-	return UART_GET_CHAR(port);
-}
-
-static void atmel_poll_put_char(struct uart_port *port, unsigned char ch)
-{
-	while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY))
-		cpu_relax();
-
-	UART_PUT_CHAR(port, ch);
-}
-#endif
-
-static int
-atmel_ioctl(struct uart_port *port, unsigned int cmd, unsigned long arg)
-{
-	struct serial_rs485 rs485conf;
-
-	switch (cmd) {
-	case TIOCSRS485:
-		if (copy_from_user(&rs485conf, (struct serial_rs485 *) arg,
-					sizeof(rs485conf)))
-			return -EFAULT;
-
-		atmel_config_rs485(port, &rs485conf);
-		break;
-
-	case TIOCGRS485:
-		if (copy_to_user((struct serial_rs485 *) arg,
-					&(to_atmel_uart_port(port)->rs485),
-					sizeof(rs485conf)))
-			return -EFAULT;
-		break;
-
-	default:
-		return -ENOIOCTLCMD;
-	}
-	return 0;
-}
-
-
-
-static struct uart_ops atmel_pops = {
-	.tx_empty	= atmel_tx_empty,
-	.set_mctrl	= atmel_set_mctrl,
-	.get_mctrl	= atmel_get_mctrl,
-	.stop_tx	= atmel_stop_tx,
-	.start_tx	= atmel_start_tx,
-	.stop_rx	= atmel_stop_rx,
-	.enable_ms	= atmel_enable_ms,
-	.break_ctl	= atmel_break_ctl,
-	.startup	= atmel_startup,
-	.shutdown	= atmel_shutdown,
-	.flush_buffer	= atmel_flush_buffer,
-	.set_termios	= atmel_set_termios,
-	.type		= atmel_type,
-	.release_port	= atmel_release_port,
-	.request_port	= atmel_request_port,
-	.config_port	= atmel_config_port,
-	.verify_port	= atmel_verify_port,
-	.pm		= atmel_serial_pm,
-	.ioctl		= atmel_ioctl,
-#ifdef CONFIG_CONSOLE_POLL
-	.poll_get_char	= atmel_poll_get_char,
-	.poll_put_char	= atmel_poll_put_char,
-#endif
-};
-
-/*
- * Configure the port from the platform device resource info.
- */
-static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port,
-				      struct platform_device *pdev)
-{
-	struct uart_port *port = &atmel_port->uart;
-	struct atmel_uart_data *data = pdev->dev.platform_data;
-
-	port->iotype		= UPIO_MEM;
-	port->flags		= UPF_BOOT_AUTOCONF;
-	port->ops		= &atmel_pops;
-	port->fifosize		= 1;
-	port->line		= pdev->id;
-	port->dev		= &pdev->dev;
-	port->mapbase	= pdev->resource[0].start;
-	port->irq	= pdev->resource[1].start;
-
-	tasklet_init(&atmel_port->tasklet, atmel_tasklet_func,
-			(unsigned long)port);
-
-	memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));
-
-	if (data->regs)
-		/* Already mapped by setup code */
-		port->membase = data->regs;
-	else {
-		port->flags	|= UPF_IOREMAP;
-		port->membase	= NULL;
-	}
-
-	/* for console, the clock could already be configured */
-	if (!atmel_port->clk) {
-		atmel_port->clk = clk_get(&pdev->dev, "usart");
-		clk_enable(atmel_port->clk);
-		port->uartclk = clk_get_rate(atmel_port->clk);
-		clk_disable(atmel_port->clk);
-		/* only enable clock when USART is in use */
-	}
-
-	atmel_port->use_dma_rx = data->use_dma_rx;
-	atmel_port->use_dma_tx = data->use_dma_tx;
-	atmel_port->rs485	= data->rs485;
-	/* Use TXEMPTY for interrupt when rs485 else TXRDY or ENDTX|TXBUFE */
-	if (atmel_port->rs485.flags & SER_RS485_ENABLED)
-		atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
-	else if (atmel_use_dma_tx(port)) {
-		port->fifosize = PDC_BUFFER_SIZE;
-		atmel_port->tx_done_mask = ATMEL_US_ENDTX | ATMEL_US_TXBUFE;
-	} else {
-		atmel_port->tx_done_mask = ATMEL_US_TXRDY;
-	}
-}
-
-/*
- * Register board-specific modem-control line handlers.
- */
-void __init atmel_register_uart_fns(struct atmel_port_fns *fns)
-{
-	if (fns->enable_ms)
-		atmel_pops.enable_ms = fns->enable_ms;
-	if (fns->get_mctrl)
-		atmel_pops.get_mctrl = fns->get_mctrl;
-	if (fns->set_mctrl)
-		atmel_pops.set_mctrl = fns->set_mctrl;
-	atmel_open_hook		= fns->open;
-	atmel_close_hook	= fns->close;
-	atmel_pops.pm		= fns->pm;
-	atmel_pops.set_wake	= fns->set_wake;
-}
-
-#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
-static void atmel_console_putchar(struct uart_port *port, int ch)
-{
-	while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY))
-		cpu_relax();
-	UART_PUT_CHAR(port, ch);
-}
-
-/*
- * Interrupts are disabled on entering
- */
-static void atmel_console_write(struct console *co, const char *s, u_int count)
-{
-	struct uart_port *port = &atmel_ports[co->index].uart;
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	unsigned int status, imr;
-	unsigned int pdc_tx;
-
-	/*
-	 * First, save IMR and then disable interrupts
-	 */
-	imr = UART_GET_IMR(port);
-	UART_PUT_IDR(port, ATMEL_US_RXRDY | atmel_port->tx_done_mask);
-
-	/* Store PDC transmit status and disable it */
-	pdc_tx = UART_GET_PTSR(port) & ATMEL_PDC_TXTEN;
-	UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
-
-	uart_console_write(port, s, count, atmel_console_putchar);
-
-	/*
-	 * Finally, wait for transmitter to become empty
-	 * and restore IMR
-	 */
-	do {
-		status = UART_GET_CSR(port);
-	} while (!(status & ATMEL_US_TXRDY));
-
-	/* Restore PDC transmit status */
-	if (pdc_tx)
-		UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
-
-	/* set interrupts back the way they were */
-	UART_PUT_IER(port, imr);
-}
-
-/*
- * If the port was already initialised (eg, by a boot loader),
- * try to determine the current setup.
- */
-static void __init atmel_console_get_options(struct uart_port *port, int *baud,
-					     int *parity, int *bits)
-{
-	unsigned int mr, quot;
-
-	/*
-	 * If the baud rate generator isn't running, the port wasn't
-	 * initialized by the boot loader.
-	 */
-	quot = UART_GET_BRGR(port) & ATMEL_US_CD;
-	if (!quot)
-		return;
-
-	mr = UART_GET_MR(port) & ATMEL_US_CHRL;
-	if (mr == ATMEL_US_CHRL_8)
-		*bits = 8;
-	else
-		*bits = 7;
-
-	mr = UART_GET_MR(port) & ATMEL_US_PAR;
-	if (mr == ATMEL_US_PAR_EVEN)
-		*parity = 'e';
-	else if (mr == ATMEL_US_PAR_ODD)
-		*parity = 'o';
-
-	/*
-	 * The serial core only rounds down when matching this to a
-	 * supported baud rate. Make sure we don't end up slightly
-	 * lower than one of those, as it would make us fall through
-	 * to a much lower baud rate than we really want.
-	 */
-	*baud = port->uartclk / (16 * (quot - 1));
-}
-
-static int __init atmel_console_setup(struct console *co, char *options)
-{
-	struct uart_port *port = &atmel_ports[co->index].uart;
-	int baud = 115200;
-	int bits = 8;
-	int parity = 'n';
-	int flow = 'n';
-
-	if (port->membase == NULL) {
-		/* Port not initialized yet - delay setup */
-		return -ENODEV;
-	}
-
-	clk_enable(atmel_ports[co->index].clk);
-
-	UART_PUT_IDR(port, -1);
-	UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
-	UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
-
-	if (options)
-		uart_parse_options(options, &baud, &parity, &bits, &flow);
-	else
-		atmel_console_get_options(port, &baud, &parity, &bits);
-
-	return uart_set_options(port, co, baud, parity, bits, flow);
-}
-
-static struct uart_driver atmel_uart;
-
-static struct console atmel_console = {
-	.name		= ATMEL_DEVICENAME,
-	.write		= atmel_console_write,
-	.device		= uart_console_device,
-	.setup		= atmel_console_setup,
-	.flags		= CON_PRINTBUFFER,
-	.index		= -1,
-	.data		= &atmel_uart,
-};
-
-#define ATMEL_CONSOLE_DEVICE	(&atmel_console)
-
-/*
- * Early console initialization (before VM subsystem initialized).
- */
-static int __init atmel_console_init(void)
-{
-	if (atmel_default_console_device) {
-		add_preferred_console(ATMEL_DEVICENAME,
-				      atmel_default_console_device->id, NULL);
-		atmel_init_port(&atmel_ports[atmel_default_console_device->id],
-				atmel_default_console_device);
-		register_console(&atmel_console);
-	}
-
-	return 0;
-}
-
-console_initcall(atmel_console_init);
-
-/*
- * Late console initialization.
- */
-static int __init atmel_late_console_init(void)
-{
-	if (atmel_default_console_device
-	    && !(atmel_console.flags & CON_ENABLED))
-		register_console(&atmel_console);
-
-	return 0;
-}
-
-core_initcall(atmel_late_console_init);
-
-static inline bool atmel_is_console_port(struct uart_port *port)
-{
-	return port->cons && port->cons->index == port->line;
-}
-
-#else
-#define ATMEL_CONSOLE_DEVICE	NULL
-
-static inline bool atmel_is_console_port(struct uart_port *port)
-{
-	return false;
-}
-#endif
-
-static struct uart_driver atmel_uart = {
-	.owner		= THIS_MODULE,
-	.driver_name	= "atmel_serial",
-	.dev_name	= ATMEL_DEVICENAME,
-	.major		= SERIAL_ATMEL_MAJOR,
-	.minor		= MINOR_START,
-	.nr		= ATMEL_MAX_UART,
-	.cons		= ATMEL_CONSOLE_DEVICE,
-};
-
-#ifdef CONFIG_PM
-static bool atmel_serial_clk_will_stop(void)
-{
-#ifdef CONFIG_ARCH_AT91
-	return at91_suspend_entering_slow_clock();
-#else
-	return false;
-#endif
-}
-
-static int atmel_serial_suspend(struct platform_device *pdev,
-				pm_message_t state)
-{
-	struct uart_port *port = platform_get_drvdata(pdev);
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	if (atmel_is_console_port(port) && console_suspend_enabled) {
-		/* Drain the TX shifter */
-		while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY))
-			cpu_relax();
-	}
-
-	/* we can not wake up if we're running on slow clock */
-	atmel_port->may_wakeup = device_may_wakeup(&pdev->dev);
-	if (atmel_serial_clk_will_stop())
-		device_set_wakeup_enable(&pdev->dev, 0);
-
-	uart_suspend_port(&atmel_uart, port);
-
-	return 0;
-}
-
-static int atmel_serial_resume(struct platform_device *pdev)
-{
-	struct uart_port *port = platform_get_drvdata(pdev);
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-
-	uart_resume_port(&atmel_uart, port);
-	device_set_wakeup_enable(&pdev->dev, atmel_port->may_wakeup);
-
-	return 0;
-}
-#else
-#define atmel_serial_suspend NULL
-#define atmel_serial_resume NULL
-#endif
-
-static int __devinit atmel_serial_probe(struct platform_device *pdev)
-{
-	struct atmel_uart_port *port;
-	void *data;
-	int ret;
-
-	BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1));
-
-	port = &atmel_ports[pdev->id];
-	port->backup_imr = 0;
-
-	atmel_init_port(port, pdev);
-
-	if (!atmel_use_dma_rx(&port->uart)) {
-		ret = -ENOMEM;
-		data = kmalloc(sizeof(struct atmel_uart_char)
-				* ATMEL_SERIAL_RINGSIZE, GFP_KERNEL);
-		if (!data)
-			goto err_alloc_ring;
-		port->rx_ring.buf = data;
-	}
-
-	ret = uart_add_one_port(&atmel_uart, &port->uart);
-	if (ret)
-		goto err_add_port;
-
-#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
-	if (atmel_is_console_port(&port->uart)
-			&& ATMEL_CONSOLE_DEVICE->flags & CON_ENABLED) {
-		/*
-		 * The serial core enabled the clock for us, so undo
-		 * the clk_enable() in atmel_console_setup()
-		 */
-		clk_disable(port->clk);
-	}
-#endif
-
-	device_init_wakeup(&pdev->dev, 1);
-	platform_set_drvdata(pdev, port);
-
-	return 0;
-
-err_add_port:
-	kfree(port->rx_ring.buf);
-	port->rx_ring.buf = NULL;
-err_alloc_ring:
-	if (!atmel_is_console_port(&port->uart)) {
-		clk_put(port->clk);
-		port->clk = NULL;
-	}
-
-	return ret;
-}
-
-static int __devexit atmel_serial_remove(struct platform_device *pdev)
-{
-	struct uart_port *port = platform_get_drvdata(pdev);
-	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
-	int ret = 0;
-
-	device_init_wakeup(&pdev->dev, 0);
-	platform_set_drvdata(pdev, NULL);
-
-	ret = uart_remove_one_port(&atmel_uart, port);
-
-	tasklet_kill(&atmel_port->tasklet);
-	kfree(atmel_port->rx_ring.buf);
-
-	/* "port" is allocated statically, so we shouldn't free it */
-
-	clk_put(atmel_port->clk);
-
-	return ret;
-}
-
-static struct platform_driver atmel_serial_driver = {
-	.probe		= atmel_serial_probe,
-	.remove		= __devexit_p(atmel_serial_remove),
-	.suspend	= atmel_serial_suspend,
-	.resume		= atmel_serial_resume,
-	.driver		= {
-		.name	= "atmel_usart",
-		.owner	= THIS_MODULE,
-	},
-};
-
-static int __init atmel_serial_init(void)
-{
-	int ret;
-
-	ret = uart_register_driver(&atmel_uart);
-	if (ret)
-		return ret;
-
-	ret = platform_driver_register(&atmel_serial_driver);
-	if (ret)
-		uart_unregister_driver(&atmel_uart);
-
-	return ret;
-}
-
-static void __exit atmel_serial_exit(void)
-{
-	platform_driver_unregister(&atmel_serial_driver);
-	uart_unregister_driver(&atmel_uart);
-}
-
-module_init(atmel_serial_init);
-module_exit(atmel_serial_exit);
-
-MODULE_AUTHOR("Rick Bronson");
-MODULE_DESCRIPTION("Atmel AT91 / AT32 serial port driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:atmel_usart");