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, 1519 deletions

diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c
deleted file mode 100644
index e76d7d00012..00000000000
--- a/drivers/serial/amba-pl011.c
+++ /dev/null
@@ -1,1519 +0,0 @@
-/*
- *  linux/drivers/char/amba.c
- *
- *  Driver for AMBA serial ports
- *
- *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
- *
- *  Copyright 1999 ARM Limited
- *  Copyright (C) 2000 Deep Blue Solutions Ltd.
- *  Copyright (C) 2010 ST-Ericsson SA
- *
- * 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
- *
- * This is a generic driver for ARM AMBA-type serial ports.  They
- * have a lot of 16550-like features, but are not register compatible.
- * Note that although they do have CTS, DCD and DSR inputs, they do
- * not have an RI input, nor do they have DTR or RTS outputs.  If
- * required, these have to be supplied via some other means (eg, GPIO)
- * and hooked into this driver.
- */
-
-#if defined(CONFIG_SERIAL_AMBA_PL011_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/device.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial.h>
-#include <linux/amba/bus.h>
-#include <linux/amba/serial.h>
-#include <linux/clk.h>
-#include <linux/slab.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/scatterlist.h>
-
-#include <asm/io.h>
-#include <asm/sizes.h>
-
-#define UART_NR			14
-
-#define SERIAL_AMBA_MAJOR	204
-#define SERIAL_AMBA_MINOR	64
-#define SERIAL_AMBA_NR		UART_NR
-
-#define AMBA_ISR_PASS_LIMIT	256
-
-#define UART_DR_ERROR		(UART011_DR_OE|UART011_DR_BE|UART011_DR_PE|UART011_DR_FE)
-#define UART_DUMMY_DR_RX	(1 << 16)
-
-/* There is by now at least one vendor with differing details, so handle it */
-struct vendor_data {
-	unsigned int		ifls;
-	unsigned int		fifosize;
-	unsigned int		lcrh_tx;
-	unsigned int		lcrh_rx;
-	bool			oversampling;
-	bool			dma_threshold;
-};
-
-static struct vendor_data vendor_arm = {
-	.ifls			= UART011_IFLS_RX4_8|UART011_IFLS_TX4_8,
-	.fifosize		= 16,
-	.lcrh_tx		= UART011_LCRH,
-	.lcrh_rx		= UART011_LCRH,
-	.oversampling		= false,
-	.dma_threshold		= false,
-};
-
-static struct vendor_data vendor_st = {
-	.ifls			= UART011_IFLS_RX_HALF|UART011_IFLS_TX_HALF,
-	.fifosize		= 64,
-	.lcrh_tx		= ST_UART011_LCRH_TX,
-	.lcrh_rx		= ST_UART011_LCRH_RX,
-	.oversampling		= true,
-	.dma_threshold		= true,
-};
-
-/* Deals with DMA transactions */
-struct pl011_dmatx_data {
-	struct dma_chan		*chan;
-	struct scatterlist	sg;
-	char			*buf;
-	bool			queued;
-};
-
-/*
- * We wrap our port structure around the generic uart_port.
- */
-struct uart_amba_port {
-	struct uart_port	port;
-	struct clk		*clk;
-	const struct vendor_data *vendor;
-	unsigned int		dmacr;		/* dma control reg */
-	unsigned int		im;		/* interrupt mask */
-	unsigned int		old_status;
-	unsigned int		fifosize;	/* vendor-specific */
-	unsigned int		lcrh_tx;	/* vendor-specific */
-	unsigned int		lcrh_rx;	/* vendor-specific */
-	bool			autorts;
-	char			type[12];
-#ifdef CONFIG_DMA_ENGINE
-	/* DMA stuff */
-	bool			using_dma;
-	struct pl011_dmatx_data	dmatx;
-#endif
-};
-
-/*
- * All the DMA operation mode stuff goes inside this ifdef.
- * This assumes that you have a generic DMA device interface,
- * no custom DMA interfaces are supported.
- */
-#ifdef CONFIG_DMA_ENGINE
-
-#define PL011_DMA_BUFFER_SIZE PAGE_SIZE
-
-static void pl011_dma_probe_initcall(struct uart_amba_port *uap)
-{
-	/* DMA is the sole user of the platform data right now */
-	struct amba_pl011_data *plat = uap->port.dev->platform_data;
-	struct dma_slave_config tx_conf = {
-		.dst_addr = uap->port.mapbase + UART01x_DR,
-		.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,
-		.direction = DMA_TO_DEVICE,
-		.dst_maxburst = uap->fifosize >> 1,
-	};
-	struct dma_chan *chan;
-	dma_cap_mask_t mask;
-
-	/* We need platform data */
-	if (!plat || !plat->dma_filter) {
-		dev_info(uap->port.dev, "no DMA platform data\n");
-		return;
-	}
-
-	/* Try to acquire a generic DMA engine slave channel */
-	dma_cap_zero(mask);
-	dma_cap_set(DMA_SLAVE, mask);
-
-	chan = dma_request_channel(mask, plat->dma_filter, plat->dma_tx_param);
-	if (!chan) {
-		dev_err(uap->port.dev, "no TX DMA channel!\n");
-		return;
-	}
-
-	dmaengine_slave_config(chan, &tx_conf);
-	uap->dmatx.chan = chan;
-
-	dev_info(uap->port.dev, "DMA channel TX %s\n",
-		 dma_chan_name(uap->dmatx.chan));
-}
-
-#ifndef MODULE
-/*
- * Stack up the UARTs and let the above initcall be done at device
- * initcall time, because the serial driver is called as an arch
- * initcall, and at this time the DMA subsystem is not yet registered.
- * At this point the driver will switch over to using DMA where desired.
- */
-struct dma_uap {
-	struct list_head node;
-	struct uart_amba_port *uap;
-};
-
-static LIST_HEAD(pl011_dma_uarts);
-
-static int __init pl011_dma_initcall(void)
-{
-	struct list_head *node, *tmp;
-
-	list_for_each_safe(node, tmp, &pl011_dma_uarts) {
-		struct dma_uap *dmau = list_entry(node, struct dma_uap, node);
-		pl011_dma_probe_initcall(dmau->uap);
-		list_del(node);
-		kfree(dmau);
-	}
-	return 0;
-}
-
-device_initcall(pl011_dma_initcall);
-
-static void pl011_dma_probe(struct uart_amba_port *uap)
-{
-	struct dma_uap *dmau = kzalloc(sizeof(struct dma_uap), GFP_KERNEL);
-	if (dmau) {
-		dmau->uap = uap;
-		list_add_tail(&dmau->node, &pl011_dma_uarts);
-	}
-}
-#else
-static void pl011_dma_probe(struct uart_amba_port *uap)
-{
-	pl011_dma_probe_initcall(uap);
-}
-#endif
-
-static void pl011_dma_remove(struct uart_amba_port *uap)
-{
-	/* TODO: remove the initcall if it has not yet executed */
-	if (uap->dmatx.chan)
-		dma_release_channel(uap->dmatx.chan);
-}
-
-
-/* Forward declare this for the refill routine */
-static int pl011_dma_tx_refill(struct uart_amba_port *uap);
-
-/*
- * The current DMA TX buffer has been sent.
- * Try to queue up another DMA buffer.
- */
-static void pl011_dma_tx_callback(void *data)
-{
-	struct uart_amba_port *uap = data;
-	struct pl011_dmatx_data *dmatx = &uap->dmatx;
-	unsigned long flags;
-	u16 dmacr;
-
-	spin_lock_irqsave(&uap->port.lock, flags);
-	if (uap->dmatx.queued)
-		dma_unmap_sg(dmatx->chan->device->dev, &dmatx->sg, 1,
-			     DMA_TO_DEVICE);
-
-	dmacr = uap->dmacr;
-	uap->dmacr = dmacr & ~UART011_TXDMAE;
-	writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-
-	/*
-	 * If TX DMA was disabled, it means that we've stopped the DMA for
-	 * some reason (eg, XOFF received, or we want to send an X-char.)
-	 *
-	 * Note: we need to be careful here of a potential race between DMA
-	 * and the rest of the driver - if the driver disables TX DMA while
-	 * a TX buffer completing, we must update the tx queued status to
-	 * get further refills (hence we check dmacr).
-	 */
-	if (!(dmacr & UART011_TXDMAE) || uart_tx_stopped(&uap->port) ||
-	    uart_circ_empty(&uap->port.state->xmit)) {
-		uap->dmatx.queued = false;
-		spin_unlock_irqrestore(&uap->port.lock, flags);
-		return;
-	}
-
-	if (pl011_dma_tx_refill(uap) <= 0) {
-		/*
-		 * We didn't queue a DMA buffer for some reason, but we
-		 * have data pending to be sent.  Re-enable the TX IRQ.
-		 */
-		uap->im |= UART011_TXIM;
-		writew(uap->im, uap->port.membase + UART011_IMSC);
-	}
-	spin_unlock_irqrestore(&uap->port.lock, flags);
-}
-
-/*
- * Try to refill the TX DMA buffer.
- * Locking: called with port lock held and IRQs disabled.
- * Returns:
- *   1 if we queued up a TX DMA buffer.
- *   0 if we didn't want to handle this by DMA
- *  <0 on error
- */
-static int pl011_dma_tx_refill(struct uart_amba_port *uap)
-{
-	struct pl011_dmatx_data *dmatx = &uap->dmatx;
-	struct dma_chan *chan = dmatx->chan;
-	struct dma_device *dma_dev = chan->device;
-	struct dma_async_tx_descriptor *desc;
-	struct circ_buf *xmit = &uap->port.state->xmit;
-	unsigned int count;
-
-	/*
-	 * Try to avoid the overhead involved in using DMA if the
-	 * transaction fits in the first half of the FIFO, by using
-	 * the standard interrupt handling.  This ensures that we
-	 * issue a uart_write_wakeup() at the appropriate time.
-	 */
-	count = uart_circ_chars_pending(xmit);
-	if (count < (uap->fifosize >> 1)) {
-		uap->dmatx.queued = false;
-		return 0;
-	}
-
-	/*
-	 * Bodge: don't send the last character by DMA, as this
-	 * will prevent XON from notifying us to restart DMA.
-	 */
-	count -= 1;
-
-	/* Else proceed to copy the TX chars to the DMA buffer and fire DMA */
-	if (count > PL011_DMA_BUFFER_SIZE)
-		count = PL011_DMA_BUFFER_SIZE;
-
-	if (xmit->tail < xmit->head)
-		memcpy(&dmatx->buf[0], &xmit->buf[xmit->tail], count);
-	else {
-		size_t first = UART_XMIT_SIZE - xmit->tail;
-		size_t second = xmit->head;
-
-		memcpy(&dmatx->buf[0], &xmit->buf[xmit->tail], first);
-		if (second)
-			memcpy(&dmatx->buf[first], &xmit->buf[0], second);
-	}
-
-	dmatx->sg.length = count;
-
-	if (dma_map_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE) != 1) {
-		uap->dmatx.queued = false;
-		dev_dbg(uap->port.dev, "unable to map TX DMA\n");
-		return -EBUSY;
-	}
-
-	desc = dma_dev->device_prep_slave_sg(chan, &dmatx->sg, 1, DMA_TO_DEVICE,
-					     DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-	if (!desc) {
-		dma_unmap_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE);
-		uap->dmatx.queued = false;
-		/*
-		 * If DMA cannot be used right now, we complete this
-		 * transaction via IRQ and let the TTY layer retry.
-		 */
-		dev_dbg(uap->port.dev, "TX DMA busy\n");
-		return -EBUSY;
-	}
-
-	/* Some data to go along to the callback */
-	desc->callback = pl011_dma_tx_callback;
-	desc->callback_param = uap;
-
-	/* All errors should happen at prepare time */
-	dmaengine_submit(desc);
-
-	/* Fire the DMA transaction */
-	dma_dev->device_issue_pending(chan);
-
-	uap->dmacr |= UART011_TXDMAE;
-	writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-	uap->dmatx.queued = true;
-
-	/*
-	 * Now we know that DMA will fire, so advance the ring buffer
-	 * with the stuff we just dispatched.
-	 */
-	xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
-	uap->port.icount.tx += count;
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(&uap->port);
-
-	return 1;
-}
-
-/*
- * We received a transmit interrupt without a pending X-char but with
- * pending characters.
- * Locking: called with port lock held and IRQs disabled.
- * Returns:
- *   false if we want to use PIO to transmit
- *   true if we queued a DMA buffer
- */
-static bool pl011_dma_tx_irq(struct uart_amba_port *uap)
-{
-	if (!uap->using_dma)
-		return false;
-
-	/*
-	 * If we already have a TX buffer queued, but received a
-	 * TX interrupt, it will be because we've just sent an X-char.
-	 * Ensure the TX DMA is enabled and the TX IRQ is disabled.
-	 */
-	if (uap->dmatx.queued) {
-		uap->dmacr |= UART011_TXDMAE;
-		writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-		uap->im &= ~UART011_TXIM;
-		writew(uap->im, uap->port.membase + UART011_IMSC);
-		return true;
-	}
-
-	/*
-	 * We don't have a TX buffer queued, so try to queue one.
-	 * If we succesfully queued a buffer, mask the TX IRQ.
-	 */
-	if (pl011_dma_tx_refill(uap) > 0) {
-		uap->im &= ~UART011_TXIM;
-		writew(uap->im, uap->port.membase + UART011_IMSC);
-		return true;
-	}
-	return false;
-}
-
-/*
- * Stop the DMA transmit (eg, due to received XOFF).
- * Locking: called with port lock held and IRQs disabled.
- */
-static inline void pl011_dma_tx_stop(struct uart_amba_port *uap)
-{
-	if (uap->dmatx.queued) {
-		uap->dmacr &= ~UART011_TXDMAE;
-		writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-	}
-}
-
-/*
- * Try to start a DMA transmit, or in the case of an XON/OFF
- * character queued for send, try to get that character out ASAP.
- * Locking: called with port lock held and IRQs disabled.
- * Returns:
- *   false if we want the TX IRQ to be enabled
- *   true if we have a buffer queued
- */
-static inline bool pl011_dma_tx_start(struct uart_amba_port *uap)
-{
-	u16 dmacr;
-
-	if (!uap->using_dma)
-		return false;
-
-	if (!uap->port.x_char) {
-		/* no X-char, try to push chars out in DMA mode */
-		bool ret = true;
-
-		if (!uap->dmatx.queued) {
-			if (pl011_dma_tx_refill(uap) > 0) {
-				uap->im &= ~UART011_TXIM;
-				ret = true;
-			} else {
-				uap->im |= UART011_TXIM;
-				ret = false;
-			}
-			writew(uap->im, uap->port.membase + UART011_IMSC);
-		} else if (!(uap->dmacr & UART011_TXDMAE)) {
-			uap->dmacr |= UART011_TXDMAE;
-			writew(uap->dmacr,
-				       uap->port.membase + UART011_DMACR);
-		}
-		return ret;
-	}
-
-	/*
-	 * We have an X-char to send.  Disable DMA to prevent it loading
-	 * the TX fifo, and then see if we can stuff it into the FIFO.
-	 */
-	dmacr = uap->dmacr;
-	uap->dmacr &= ~UART011_TXDMAE;
-	writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-
-	if (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) {
-		/*
-		 * No space in the FIFO, so enable the transmit interrupt
-		 * so we know when there is space.  Note that once we've
-		 * loaded the character, we should just re-enable DMA.
-		 */
-		return false;
-	}
-
-	writew(uap->port.x_char, uap->port.membase + UART01x_DR);
-	uap->port.icount.tx++;
-	uap->port.x_char = 0;
-
-	/* Success - restore the DMA state */
-	uap->dmacr = dmacr;
-	writew(dmacr, uap->port.membase + UART011_DMACR);
-
-	return true;
-}
-
-/*
- * Flush the transmit buffer.
- * Locking: called with port lock held and IRQs disabled.
- */
-static void pl011_dma_flush_buffer(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	if (!uap->using_dma)
-		return;
-
-	/* Avoid deadlock with the DMA engine callback */
-	spin_unlock(&uap->port.lock);
-	dmaengine_terminate_all(uap->dmatx.chan);
-	spin_lock(&uap->port.lock);
-	if (uap->dmatx.queued) {
-		dma_unmap_sg(uap->dmatx.chan->device->dev, &uap->dmatx.sg, 1,
-			     DMA_TO_DEVICE);
-		uap->dmatx.queued = false;
-		uap->dmacr &= ~UART011_TXDMAE;
-		writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-	}
-}
-
-
-static void pl011_dma_startup(struct uart_amba_port *uap)
-{
-	if (!uap->dmatx.chan)
-		return;
-
-	uap->dmatx.buf = kmalloc(PL011_DMA_BUFFER_SIZE, GFP_KERNEL);
-	if (!uap->dmatx.buf) {
-		dev_err(uap->port.dev, "no memory for DMA TX buffer\n");
-		uap->port.fifosize = uap->fifosize;
-		return;
-	}
-
-	sg_init_one(&uap->dmatx.sg, uap->dmatx.buf, PL011_DMA_BUFFER_SIZE);
-
-	/* The DMA buffer is now the FIFO the TTY subsystem can use */
-	uap->port.fifosize = PL011_DMA_BUFFER_SIZE;
-	uap->using_dma = true;
-
-	/* Turn on DMA error (RX/TX will be enabled on demand) */
-	uap->dmacr |= UART011_DMAONERR;
-	writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-
-	/*
-	 * ST Micro variants has some specific dma burst threshold
-	 * compensation. Set this to 16 bytes, so burst will only
-	 * be issued above/below 16 bytes.
-	 */
-	if (uap->vendor->dma_threshold)
-		writew(ST_UART011_DMAWM_RX_16 | ST_UART011_DMAWM_TX_16,
-			       uap->port.membase + ST_UART011_DMAWM);
-}
-
-static void pl011_dma_shutdown(struct uart_amba_port *uap)
-{
-	if (!uap->using_dma)
-		return;
-
-	/* Disable RX and TX DMA */
-	while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY)
-		barrier();
-
-	spin_lock_irq(&uap->port.lock);
-	uap->dmacr &= ~(UART011_DMAONERR | UART011_RXDMAE | UART011_TXDMAE);
-	writew(uap->dmacr, uap->port.membase + UART011_DMACR);
-	spin_unlock_irq(&uap->port.lock);
-
-	/* In theory, this should already be done by pl011_dma_flush_buffer */
-	dmaengine_terminate_all(uap->dmatx.chan);
-	if (uap->dmatx.queued) {
-		dma_unmap_sg(uap->dmatx.chan->device->dev, &uap->dmatx.sg, 1,
-			     DMA_TO_DEVICE);
-		uap->dmatx.queued = false;
-	}
-
-	kfree(uap->dmatx.buf);
-
-	uap->using_dma = false;
-}
-
-#else
-/* Blank functions if the DMA engine is not available */
-static inline void pl011_dma_probe(struct uart_amba_port *uap)
-{
-}
-
-static inline void pl011_dma_remove(struct uart_amba_port *uap)
-{
-}
-
-static inline void pl011_dma_startup(struct uart_amba_port *uap)
-{
-}
-
-static inline void pl011_dma_shutdown(struct uart_amba_port *uap)
-{
-}
-
-static inline bool pl011_dma_tx_irq(struct uart_amba_port *uap)
-{
-	return false;
-}
-
-static inline void pl011_dma_tx_stop(struct uart_amba_port *uap)
-{
-}
-
-static inline bool pl011_dma_tx_start(struct uart_amba_port *uap)
-{
-	return false;
-}
-
-#define pl011_dma_flush_buffer	NULL
-#endif
-
-
-static void pl011_stop_tx(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	uap->im &= ~UART011_TXIM;
-	writew(uap->im, uap->port.membase + UART011_IMSC);
-	pl011_dma_tx_stop(uap);
-}
-
-static void pl011_start_tx(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	if (!pl011_dma_tx_start(uap)) {
-		uap->im |= UART011_TXIM;
-		writew(uap->im, uap->port.membase + UART011_IMSC);
-	}
-}
-
-static void pl011_stop_rx(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	uap->im &= ~(UART011_RXIM|UART011_RTIM|UART011_FEIM|
-		     UART011_PEIM|UART011_BEIM|UART011_OEIM);
-	writew(uap->im, uap->port.membase + UART011_IMSC);
-}
-
-static void pl011_enable_ms(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	uap->im |= UART011_RIMIM|UART011_CTSMIM|UART011_DCDMIM|UART011_DSRMIM;
-	writew(uap->im, uap->port.membase + UART011_IMSC);
-}
-
-static void pl011_rx_chars(struct uart_amba_port *uap)
-{
-	struct tty_struct *tty = uap->port.state->port.tty;
-	unsigned int status, ch, flag, max_count = 256;
-
-	status = readw(uap->port.membase + UART01x_FR);
-	while ((status & UART01x_FR_RXFE) == 0 && max_count--) {
-		ch = readw(uap->port.membase + UART01x_DR) | UART_DUMMY_DR_RX;
-		flag = TTY_NORMAL;
-		uap->port.icount.rx++;
-
-		/*
-		 * Note that the error handling code is
-		 * out of the main execution path
-		 */
-		if (unlikely(ch & UART_DR_ERROR)) {
-			if (ch & UART011_DR_BE) {
-				ch &= ~(UART011_DR_FE | UART011_DR_PE);
-				uap->port.icount.brk++;
-				if (uart_handle_break(&uap->port))
-					goto ignore_char;
-			} else if (ch & UART011_DR_PE)
-				uap->port.icount.parity++;
-			else if (ch & UART011_DR_FE)
-				uap->port.icount.frame++;
-			if (ch & UART011_DR_OE)
-				uap->port.icount.overrun++;
-
-			ch &= uap->port.read_status_mask;
-
-			if (ch & UART011_DR_BE)
-				flag = TTY_BREAK;
-			else if (ch & UART011_DR_PE)
-				flag = TTY_PARITY;
-			else if (ch & UART011_DR_FE)
-				flag = TTY_FRAME;
-		}
-
-		if (uart_handle_sysrq_char(&uap->port, ch & 255))
-			goto ignore_char;
-
-		uart_insert_char(&uap->port, ch, UART011_DR_OE, ch, flag);
-
-	ignore_char:
-		status = readw(uap->port.membase + UART01x_FR);
-	}
-	spin_unlock(&uap->port.lock);
-	tty_flip_buffer_push(tty);
-	spin_lock(&uap->port.lock);
-}
-
-static void pl011_tx_chars(struct uart_amba_port *uap)
-{
-	struct circ_buf *xmit = &uap->port.state->xmit;
-	int count;
-
-	if (uap->port.x_char) {
-		writew(uap->port.x_char, uap->port.membase + UART01x_DR);
-		uap->port.icount.tx++;
-		uap->port.x_char = 0;
-		return;
-	}
-	if (uart_circ_empty(xmit) || uart_tx_stopped(&uap->port)) {
-		pl011_stop_tx(&uap->port);
-		return;
-	}
-
-	/* If we are using DMA mode, try to send some characters. */
-	if (pl011_dma_tx_irq(uap))
-		return;
-
-	count = uap->fifosize >> 1;
-	do {
-		writew(xmit->buf[xmit->tail], uap->port.membase + UART01x_DR);
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		uap->port.icount.tx++;
-		if (uart_circ_empty(xmit))
-			break;
-	} while (--count > 0);
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(&uap->port);
-
-	if (uart_circ_empty(xmit))
-		pl011_stop_tx(&uap->port);
-}
-
-static void pl011_modem_status(struct uart_amba_port *uap)
-{
-	unsigned int status, delta;
-
-	status = readw(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
-
-	delta = status ^ uap->old_status;
-	uap->old_status = status;
-
-	if (!delta)
-		return;
-
-	if (delta & UART01x_FR_DCD)
-		uart_handle_dcd_change(&uap->port, status & UART01x_FR_DCD);
-
-	if (delta & UART01x_FR_DSR)
-		uap->port.icount.dsr++;
-
-	if (delta & UART01x_FR_CTS)
-		uart_handle_cts_change(&uap->port, status & UART01x_FR_CTS);
-
-	wake_up_interruptible(&uap->port.state->port.delta_msr_wait);
-}
-
-static irqreturn_t pl011_int(int irq, void *dev_id)
-{
-	struct uart_amba_port *uap = dev_id;
-	unsigned long flags;
-	unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
-	int handled = 0;
-
-	spin_lock_irqsave(&uap->port.lock, flags);
-
-	status = readw(uap->port.membase + UART011_MIS);
-	if (status) {
-		do {
-			writew(status & ~(UART011_TXIS|UART011_RTIS|
-					  UART011_RXIS),
-			       uap->port.membase + UART011_ICR);
-
-			if (status & (UART011_RTIS|UART011_RXIS))
-				pl011_rx_chars(uap);
-			if (status & (UART011_DSRMIS|UART011_DCDMIS|
-				      UART011_CTSMIS|UART011_RIMIS))
-				pl011_modem_status(uap);
-			if (status & UART011_TXIS)
-				pl011_tx_chars(uap);
-
-			if (pass_counter-- == 0)
-				break;
-
-			status = readw(uap->port.membase + UART011_MIS);
-		} while (status != 0);
-		handled = 1;
-	}
-
-	spin_unlock_irqrestore(&uap->port.lock, flags);
-
-	return IRQ_RETVAL(handled);
-}
-
-static unsigned int pl01x_tx_empty(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned int status = readw(uap->port.membase + UART01x_FR);
-	return status & (UART01x_FR_BUSY|UART01x_FR_TXFF) ? 0 : TIOCSER_TEMT;
-}
-
-static unsigned int pl01x_get_mctrl(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned int result = 0;
-	unsigned int status = readw(uap->port.membase + UART01x_FR);
-
-#define TIOCMBIT(uartbit, tiocmbit)	\
-	if (status & uartbit)		\
-		result |= tiocmbit
-
-	TIOCMBIT(UART01x_FR_DCD, TIOCM_CAR);
-	TIOCMBIT(UART01x_FR_DSR, TIOCM_DSR);
-	TIOCMBIT(UART01x_FR_CTS, TIOCM_CTS);
-	TIOCMBIT(UART011_FR_RI, TIOCM_RNG);
-#undef TIOCMBIT
-	return result;
-}
-
-static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned int cr;
-
-	cr = readw(uap->port.membase + UART011_CR);
-
-#define	TIOCMBIT(tiocmbit, uartbit)		\
-	if (mctrl & tiocmbit)		\
-		cr |= uartbit;		\
-	else				\
-		cr &= ~uartbit
-
-	TIOCMBIT(TIOCM_RTS, UART011_CR_RTS);
-	TIOCMBIT(TIOCM_DTR, UART011_CR_DTR);
-	TIOCMBIT(TIOCM_OUT1, UART011_CR_OUT1);
-	TIOCMBIT(TIOCM_OUT2, UART011_CR_OUT2);
-	TIOCMBIT(TIOCM_LOOP, UART011_CR_LBE);
-
-	if (uap->autorts) {
-		/* We need to disable auto-RTS if we want to turn RTS off */
-		TIOCMBIT(TIOCM_RTS, UART011_CR_RTSEN);
-	}
-#undef TIOCMBIT
-
-	writew(cr, uap->port.membase + UART011_CR);
-}
-
-static void pl011_break_ctl(struct uart_port *port, int break_state)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned long flags;
-	unsigned int lcr_h;
-
-	spin_lock_irqsave(&uap->port.lock, flags);
-	lcr_h = readw(uap->port.membase + uap->lcrh_tx);
-	if (break_state == -1)
-		lcr_h |= UART01x_LCRH_BRK;
-	else
-		lcr_h &= ~UART01x_LCRH_BRK;
-	writew(lcr_h, uap->port.membase + uap->lcrh_tx);
-	spin_unlock_irqrestore(&uap->port.lock, flags);
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-static int pl010_get_poll_char(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned int status;
-
-	status = readw(uap->port.membase + UART01x_FR);
-	if (status & UART01x_FR_RXFE)
-		return NO_POLL_CHAR;
-
-	return readw(uap->port.membase + UART01x_DR);
-}
-
-static void pl010_put_poll_char(struct uart_port *port,
-			 unsigned char ch)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF)
-		barrier();
-
-	writew(ch, uap->port.membase + UART01x_DR);
-}
-
-#endif /* CONFIG_CONSOLE_POLL */
-
-static int pl011_startup(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned int cr;
-	int retval;
-
-	/*
-	 * Try to enable the clock producer.
-	 */
-	retval = clk_enable(uap->clk);
-	if (retval)
-		goto out;
-
-	uap->port.uartclk = clk_get_rate(uap->clk);
-
-	/*
-	 * Allocate the IRQ
-	 */
-	retval = request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap);
-	if (retval)
-		goto clk_dis;
-
-	writew(uap->vendor->ifls, uap->port.membase + UART011_IFLS);
-
-	/*
-	 * Provoke TX FIFO interrupt into asserting.
-	 */
-	cr = UART01x_CR_UARTEN | UART011_CR_TXE | UART011_CR_LBE;
-	writew(cr, uap->port.membase + UART011_CR);
-	writew(0, uap->port.membase + UART011_FBRD);
-	writew(1, uap->port.membase + UART011_IBRD);
-	writew(0, uap->port.membase + uap->lcrh_rx);
-	if (uap->lcrh_tx != uap->lcrh_rx) {
-		int i;
-		/*
-		 * Wait 10 PCLKs before writing LCRH_TX register,
-		 * to get this delay write read only register 10 times
-		 */
-		for (i = 0; i < 10; ++i)
-			writew(0xff, uap->port.membase + UART011_MIS);
-		writew(0, uap->port.membase + uap->lcrh_tx);
-	}
-	writew(0, uap->port.membase + UART01x_DR);
-	while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY)
-		barrier();
-
-	cr = UART01x_CR_UARTEN | UART011_CR_RXE | UART011_CR_TXE;
-	writew(cr, uap->port.membase + UART011_CR);
-
-	/* Clear pending error interrupts */
-	writew(UART011_OEIS | UART011_BEIS | UART011_PEIS | UART011_FEIS,
-	       uap->port.membase + UART011_ICR);
-
-	/*
-	 * initialise the old status of the modem signals
-	 */
-	uap->old_status = readw(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
-
-	/* Startup DMA */
-	pl011_dma_startup(uap);
-
-	/*
-	 * Finally, enable interrupts
-	 */
-	spin_lock_irq(&uap->port.lock);
-	uap->im = UART011_RXIM | UART011_RTIM;
-	writew(uap->im, uap->port.membase + UART011_IMSC);
-	spin_unlock_irq(&uap->port.lock);
-
-	return 0;
-
- clk_dis:
-	clk_disable(uap->clk);
- out:
-	return retval;
-}
-
-static void pl011_shutdown_channel(struct uart_amba_port *uap,
-					unsigned int lcrh)
-{
-      unsigned long val;
-
-      val = readw(uap->port.membase + lcrh);
-      val &= ~(UART01x_LCRH_BRK | UART01x_LCRH_FEN);
-      writew(val, uap->port.membase + lcrh);
-}
-
-static void pl011_shutdown(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	/*
-	 * disable all interrupts
-	 */
-	spin_lock_irq(&uap->port.lock);
-	uap->im = 0;
-	writew(uap->im, uap->port.membase + UART011_IMSC);
-	writew(0xffff, uap->port.membase + UART011_ICR);
-	spin_unlock_irq(&uap->port.lock);
-
-	pl011_dma_shutdown(uap);
-
-	/*
-	 * Free the interrupt
-	 */
-	free_irq(uap->port.irq, uap);
-
-	/*
-	 * disable the port
-	 */
-	uap->autorts = false;
-	writew(UART01x_CR_UARTEN | UART011_CR_TXE, uap->port.membase + UART011_CR);
-
-	/*
-	 * disable break condition and fifos
-	 */
-	pl011_shutdown_channel(uap, uap->lcrh_rx);
-	if (uap->lcrh_rx != uap->lcrh_tx)
-		pl011_shutdown_channel(uap, uap->lcrh_tx);
-
-	/*
-	 * Shut down the clock producer
-	 */
-	clk_disable(uap->clk);
-}
-
-static void
-pl011_set_termios(struct uart_port *port, struct ktermios *termios,
-		     struct ktermios *old)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned int lcr_h, old_cr;
-	unsigned long flags;
-	unsigned int baud, quot, clkdiv;
-
-	if (uap->vendor->oversampling)
-		clkdiv = 8;
-	else
-		clkdiv = 16;
-
-	/*
-	 * Ask the core to calculate the divisor for us.
-	 */
-	baud = uart_get_baud_rate(port, termios, old, 0,
-				  port->uartclk / clkdiv);
-
-	if (baud > port->uartclk/16)
-		quot = DIV_ROUND_CLOSEST(port->uartclk * 8, baud);
-	else
-		quot = DIV_ROUND_CLOSEST(port->uartclk * 4, baud);
-
-	switch (termios->c_cflag & CSIZE) {
-	case CS5:
-		lcr_h = UART01x_LCRH_WLEN_5;
-		break;
-	case CS6:
-		lcr_h = UART01x_LCRH_WLEN_6;
-		break;
-	case CS7:
-		lcr_h = UART01x_LCRH_WLEN_7;
-		break;
-	default: // CS8
-		lcr_h = UART01x_LCRH_WLEN_8;
-		break;
-	}
-	if (termios->c_cflag & CSTOPB)
-		lcr_h |= UART01x_LCRH_STP2;
-	if (termios->c_cflag & PARENB) {
-		lcr_h |= UART01x_LCRH_PEN;
-		if (!(termios->c_cflag & PARODD))
-			lcr_h |= UART01x_LCRH_EPS;
-	}
-	if (uap->fifosize > 1)
-		lcr_h |= UART01x_LCRH_FEN;
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	/*
-	 * Update the per-port timeout.
-	 */
-	uart_update_timeout(port, termios->c_cflag, baud);
-
-	port->read_status_mask = UART011_DR_OE | 255;
-	if (termios->c_iflag & INPCK)
-		port->read_status_mask |= UART011_DR_FE | UART011_DR_PE;
-	if (termios->c_iflag & (BRKINT | PARMRK))
-		port->read_status_mask |= UART011_DR_BE;
-
-	/*
-	 * Characters to ignore
-	 */
-	port->ignore_status_mask = 0;
-	if (termios->c_iflag & IGNPAR)
-		port->ignore_status_mask |= UART011_DR_FE | UART011_DR_PE;
-	if (termios->c_iflag & IGNBRK) {
-		port->ignore_status_mask |= UART011_DR_BE;
-		/*
-		 * If we're ignoring parity and break indicators,
-		 * ignore overruns too (for real raw support).
-		 */
-		if (termios->c_iflag & IGNPAR)
-			port->ignore_status_mask |= UART011_DR_OE;
-	}
-
-	/*
-	 * Ignore all characters if CREAD is not set.
-	 */
-	if ((termios->c_cflag & CREAD) == 0)
-		port->ignore_status_mask |= UART_DUMMY_DR_RX;
-
-	if (UART_ENABLE_MS(port, termios->c_cflag))
-		pl011_enable_ms(port);
-
-	/* first, disable everything */
-	old_cr = readw(port->membase + UART011_CR);
-	writew(0, port->membase + UART011_CR);
-
-	if (termios->c_cflag & CRTSCTS) {
-		if (old_cr & UART011_CR_RTS)
-			old_cr |= UART011_CR_RTSEN;
-
-		old_cr |= UART011_CR_CTSEN;
-		uap->autorts = true;
-	} else {
-		old_cr &= ~(UART011_CR_CTSEN | UART011_CR_RTSEN);
-		uap->autorts = false;
-	}
-
-	if (uap->vendor->oversampling) {
-		if (baud > port->uartclk / 16)
-			old_cr |= ST_UART011_CR_OVSFACT;
-		else
-			old_cr &= ~ST_UART011_CR_OVSFACT;
-	}
-
-	/* Set baud rate */
-	writew(quot & 0x3f, port->membase + UART011_FBRD);
-	writew(quot >> 6, port->membase + UART011_IBRD);
-
-	/*
-	 * ----------v----------v----------v----------v-----
-	 * NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L
-	 * ----------^----------^----------^----------^-----
-	 */
-	writew(lcr_h, port->membase + uap->lcrh_rx);
-	if (uap->lcrh_rx != uap->lcrh_tx) {
-		int i;
-		/*
-		 * Wait 10 PCLKs before writing LCRH_TX register,
-		 * to get this delay write read only register 10 times
-		 */
-		for (i = 0; i < 10; ++i)
-			writew(0xff, uap->port.membase + UART011_MIS);
-		writew(lcr_h, port->membase + uap->lcrh_tx);
-	}
-	writew(old_cr, port->membase + UART011_CR);
-
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static const char *pl011_type(struct uart_port *port)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	return uap->port.type == PORT_AMBA ? uap->type : NULL;
-}
-
-/*
- * Release the memory region(s) being used by 'port'
- */
-static void pl010_release_port(struct uart_port *port)
-{
-	release_mem_region(port->mapbase, SZ_4K);
-}
-
-/*
- * Request the memory region(s) being used by 'port'
- */
-static int pl010_request_port(struct uart_port *port)
-{
-	return request_mem_region(port->mapbase, SZ_4K, "uart-pl011")
-			!= NULL ? 0 : -EBUSY;
-}
-
-/*
- * Configure/autoconfigure the port.
- */
-static void pl010_config_port(struct uart_port *port, int flags)
-{
-	if (flags & UART_CONFIG_TYPE) {
-		port->type = PORT_AMBA;
-		pl010_request_port(port);
-	}
-}
-
-/*
- * verify the new serial_struct (for TIOCSSERIAL).
- */
-static int pl010_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
-	int ret = 0;
-	if (ser->type != PORT_UNKNOWN && ser->type != PORT_AMBA)
-		ret = -EINVAL;
-	if (ser->irq < 0 || ser->irq >= nr_irqs)
-		ret = -EINVAL;
-	if (ser->baud_base < 9600)
-		ret = -EINVAL;
-	return ret;
-}
-
-static struct uart_ops amba_pl011_pops = {
-	.tx_empty	= pl01x_tx_empty,
-	.set_mctrl	= pl011_set_mctrl,
-	.get_mctrl	= pl01x_get_mctrl,
-	.stop_tx	= pl011_stop_tx,
-	.start_tx	= pl011_start_tx,
-	.stop_rx	= pl011_stop_rx,
-	.enable_ms	= pl011_enable_ms,
-	.break_ctl	= pl011_break_ctl,
-	.startup	= pl011_startup,
-	.shutdown	= pl011_shutdown,
-	.flush_buffer	= pl011_dma_flush_buffer,
-	.set_termios	= pl011_set_termios,
-	.type		= pl011_type,
-	.release_port	= pl010_release_port,
-	.request_port	= pl010_request_port,
-	.config_port	= pl010_config_port,
-	.verify_port	= pl010_verify_port,
-#ifdef CONFIG_CONSOLE_POLL
-	.poll_get_char = pl010_get_poll_char,
-	.poll_put_char = pl010_put_poll_char,
-#endif
-};
-
-static struct uart_amba_port *amba_ports[UART_NR];
-
-#ifdef CONFIG_SERIAL_AMBA_PL011_CONSOLE
-
-static void pl011_console_putchar(struct uart_port *port, int ch)
-{
-	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-
-	while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF)
-		barrier();
-	writew(ch, uap->port.membase + UART01x_DR);
-}
-
-static void
-pl011_console_write(struct console *co, const char *s, unsigned int count)
-{
-	struct uart_amba_port *uap = amba_ports[co->index];
-	unsigned int status, old_cr, new_cr;
-
-	clk_enable(uap->clk);
-
-	/*
-	 *	First save the CR then disable the interrupts
-	 */
-	old_cr = readw(uap->port.membase + UART011_CR);
-	new_cr = old_cr & ~UART011_CR_CTSEN;
-	new_cr |= UART01x_CR_UARTEN | UART011_CR_TXE;
-	writew(new_cr, uap->port.membase + UART011_CR);
-
-	uart_console_write(&uap->port, s, count, pl011_console_putchar);
-
-	/*
-	 *	Finally, wait for transmitter to become empty
-	 *	and restore the TCR
-	 */
-	do {
-		status = readw(uap->port.membase + UART01x_FR);
-	} while (status & UART01x_FR_BUSY);
-	writew(old_cr, uap->port.membase + UART011_CR);
-
-	clk_disable(uap->clk);
-}
-
-static void __init
-pl011_console_get_options(struct uart_amba_port *uap, int *baud,
-			     int *parity, int *bits)
-{
-	if (readw(uap->port.membase + UART011_CR) & UART01x_CR_UARTEN) {
-		unsigned int lcr_h, ibrd, fbrd;
-
-		lcr_h = readw(uap->port.membase + uap->lcrh_tx);
-
-		*parity = 'n';
-		if (lcr_h & UART01x_LCRH_PEN) {
-			if (lcr_h & UART01x_LCRH_EPS)
-				*parity = 'e';
-			else
-				*parity = 'o';
-		}
-
-		if ((lcr_h & 0x60) == UART01x_LCRH_WLEN_7)
-			*bits = 7;
-		else
-			*bits = 8;
-
-		ibrd = readw(uap->port.membase + UART011_IBRD);
-		fbrd = readw(uap->port.membase + UART011_FBRD);
-
-		*baud = uap->port.uartclk * 4 / (64 * ibrd + fbrd);
-
-		if (uap->vendor->oversampling) {
-			if (readw(uap->port.membase + UART011_CR)
-				  & ST_UART011_CR_OVSFACT)
-				*baud *= 2;
-		}
-	}
-}
-
-static int __init pl011_console_setup(struct console *co, char *options)
-{
-	struct uart_amba_port *uap;
-	int baud = 38400;
-	int bits = 8;
-	int parity = 'n';
-	int flow = 'n';
-
-	/*
-	 * Check whether an invalid uart number has been specified, and
-	 * if so, search for the first available port that does have
-	 * console support.
-	 */
-	if (co->index >= UART_NR)
-		co->index = 0;
-	uap = amba_ports[co->index];
-	if (!uap)
-		return -ENODEV;
-
-	uap->port.uartclk = clk_get_rate(uap->clk);
-
-	if (options)
-		uart_parse_options(options, &baud, &parity, &bits, &flow);
-	else
-		pl011_console_get_options(uap, &baud, &parity, &bits);
-
-	return uart_set_options(&uap->port, co, baud, parity, bits, flow);
-}
-
-static struct uart_driver amba_reg;
-static struct console amba_console = {
-	.name		= "ttyAMA",
-	.write		= pl011_console_write,
-	.device		= uart_console_device,
-	.setup		= pl011_console_setup,
-	.flags		= CON_PRINTBUFFER,
-	.index		= -1,
-	.data		= &amba_reg,
-};
-
-#define AMBA_CONSOLE	(&amba_console)
-#else
-#define AMBA_CONSOLE	NULL
-#endif
-
-static struct uart_driver amba_reg = {
-	.owner			= THIS_MODULE,
-	.driver_name		= "ttyAMA",
-	.dev_name		= "ttyAMA",
-	.major			= SERIAL_AMBA_MAJOR,
-	.minor			= SERIAL_AMBA_MINOR,
-	.nr			= UART_NR,
-	.cons			= AMBA_CONSOLE,
-};
-
-static int pl011_probe(struct amba_device *dev, struct amba_id *id)
-{
-	struct uart_amba_port *uap;
-	struct vendor_data *vendor = id->data;
-	void __iomem *base;
-	int i, ret;
-
-	for (i = 0; i < ARRAY_SIZE(amba_ports); i++)
-		if (amba_ports[i] == NULL)
-			break;
-
-	if (i == ARRAY_SIZE(amba_ports)) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	uap = kzalloc(sizeof(struct uart_amba_port), GFP_KERNEL);
-	if (uap == NULL) {
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	base = ioremap(dev->res.start, resource_size(&dev->res));
-	if (!base) {
-		ret = -ENOMEM;
-		goto free;
-	}
-
-	uap->clk = clk_get(&dev->dev, NULL);
-	if (IS_ERR(uap->clk)) {
-		ret = PTR_ERR(uap->clk);
-		goto unmap;
-	}
-
-	uap->vendor = vendor;
-	uap->lcrh_rx = vendor->lcrh_rx;
-	uap->lcrh_tx = vendor->lcrh_tx;
-	uap->fifosize = vendor->fifosize;
-	uap->port.dev = &dev->dev;
-	uap->port.mapbase = dev->res.start;
-	uap->port.membase = base;
-	uap->port.iotype = UPIO_MEM;
-	uap->port.irq = dev->irq[0];
-	uap->port.fifosize = uap->fifosize;
-	uap->port.ops = &amba_pl011_pops;
-	uap->port.flags = UPF_BOOT_AUTOCONF;
-	uap->port.line = i;
-	pl011_dma_probe(uap);
-
-	snprintf(uap->type, sizeof(uap->type), "PL011 rev%u", amba_rev(dev));
-
-	amba_ports[i] = uap;
-
-	amba_set_drvdata(dev, uap);
-	ret = uart_add_one_port(&amba_reg, &uap->port);
-	if (ret) {
-		amba_set_drvdata(dev, NULL);
-		amba_ports[i] = NULL;
-		pl011_dma_remove(uap);
-		clk_put(uap->clk);
- unmap:
-		iounmap(base);
- free:
-		kfree(uap);
-	}
- out:
-	return ret;
-}
-
-static int pl011_remove(struct amba_device *dev)
-{
-	struct uart_amba_port *uap = amba_get_drvdata(dev);
-	int i;
-
-	amba_set_drvdata(dev, NULL);
-
-	uart_remove_one_port(&amba_reg, &uap->port);
-
-	for (i = 0; i < ARRAY_SIZE(amba_ports); i++)
-		if (amba_ports[i] == uap)
-			amba_ports[i] = NULL;
-
-	pl011_dma_remove(uap);
-	iounmap(uap->port.membase);
-	clk_put(uap->clk);
-	kfree(uap);
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int pl011_suspend(struct amba_device *dev, pm_message_t state)
-{
-	struct uart_amba_port *uap = amba_get_drvdata(dev);
-
-	if (!uap)
-		return -EINVAL;
-
-	return uart_suspend_port(&amba_reg, &uap->port);
-}
-
-static int pl011_resume(struct amba_device *dev)
-{
-	struct uart_amba_port *uap = amba_get_drvdata(dev);
-
-	if (!uap)
-		return -EINVAL;
-
-	return uart_resume_port(&amba_reg, &uap->port);
-}
-#endif
-
-static struct amba_id pl011_ids[] = {
-	{
-		.id	= 0x00041011,
-		.mask	= 0x000fffff,
-		.data	= &vendor_arm,
-	},
-	{
-		.id	= 0x00380802,
-		.mask	= 0x00ffffff,
-		.data	= &vendor_st,
-	},
-	{ 0, 0 },
-};
-
-static struct amba_driver pl011_driver = {
-	.drv = {
-		.name	= "uart-pl011",
-	},
-	.id_table	= pl011_ids,
-	.probe		= pl011_probe,
-	.remove		= pl011_remove,
-#ifdef CONFIG_PM
-	.suspend	= pl011_suspend,
-	.resume		= pl011_resume,
-#endif
-};
-
-static int __init pl011_init(void)
-{
-	int ret;
-	printk(KERN_INFO "Serial: AMBA PL011 UART driver\n");
-
-	ret = uart_register_driver(&amba_reg);
-	if (ret == 0) {
-		ret = amba_driver_register(&pl011_driver);
-		if (ret)
-			uart_unregister_driver(&amba_reg);
-	}
-	return ret;
-}
-
-static void __exit pl011_exit(void)
-{
-	amba_driver_unregister(&pl011_driver);
-	uart_unregister_driver(&amba_reg);
-}
-
-/*
- * While this can be a module, if builtin it's most likely the console
- * So let's leave module_exit but move module_init to an earlier place
- */
-arch_initcall(pl011_init);
-module_exit(pl011_exit);
-
-MODULE_AUTHOR("ARM Ltd/Deep Blue Solutions Ltd");
-MODULE_DESCRIPTION("ARM AMBA serial port driver");
-MODULE_LICENSE("GPL");