x86, mrst: remove Moorestown specific serial drivers

Intel Moorestown platform support was removed few years ago. This is a follow
up which removes Moorestown specific code for the serial devices. It includes
mrst_max3110 and earlyprintk bits.

This was used on SFI (Medfield, Clovertrail) based platforms as well, though
new ones use normal serial interface for the console service.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 909 deletions

diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c
deleted file mode 100644
index 77239d5e620..00000000000
--- a/drivers/tty/serial/mrst_max3110.c
+++ /dev/null
@@ -1,909 +0,0 @@
-/*
- *  mrst_max3110.c - spi uart protocol driver for Maxim 3110
- *
- * Copyright (c) 2008-2010, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-/*
- * Note:
- * 1. From Max3110 spec, the Rx FIFO has 8 words, while the Tx FIFO only has
- *    1 word. If SPI master controller doesn't support sclk frequency change,
- *    then the char need be sent out one by one with some delay
- *
- * 2. Currently only RX available interrupt is used, no need for waiting TXE
- *    interrupt for a low speed UART device
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#ifdef CONFIG_MAGIC_SYSRQ
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/irq.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial_reg.h>
-
-#include <linux/kthread.h>
-#include <linux/spi/spi.h>
-#include <linux/pm.h>
-
-#include "mrst_max3110.h"
-
-#define UART_TX_NEEDED 1
-#define CON_TX_NEEDED  2
-#define BIT_IRQ_PENDING    3
-
-struct uart_max3110 {
-	struct uart_port port;
-	struct spi_device *spi;
-	char name[SPI_NAME_SIZE];
-
-	wait_queue_head_t wq;
-	struct task_struct *main_thread;
-	struct task_struct *read_thread;
-	struct mutex thread_mutex;
-	struct mutex io_mutex;
-
-	u32 baud;
-	u16 cur_conf;
-	u8 clock;
-	u8 parity, word_7bits;
-	u16 irq;
-
-	unsigned long uart_flags;
-
-	/* console related */
-	struct circ_buf con_xmit;
-};
-
-/* global data structure, may need be removed */
-static struct uart_max3110 *pmax;
-
-static int receive_chars(struct uart_max3110 *max,
-				unsigned short *str, int len);
-static int max3110_read_multi(struct uart_max3110 *max);
-static void max3110_con_receive(struct uart_max3110 *max);
-
-static int max3110_write_then_read(struct uart_max3110 *max,
-		const void *txbuf, void *rxbuf, unsigned len, int always_fast)
-{
-	struct spi_device *spi = max->spi;
-	struct spi_message	message;
-	struct spi_transfer	x;
-	int ret;
-
-	mutex_lock(&max->io_mutex);
-	spi_message_init(&message);
-	memset(&x, 0, sizeof x);
-	x.len = len;
-	x.tx_buf = txbuf;
-	x.rx_buf = rxbuf;
-	spi_message_add_tail(&x, &message);
-
-	if (always_fast)
-		x.speed_hz = spi->max_speed_hz;
-	else if (max->baud)
-		x.speed_hz = max->baud;
-
-	/* Do the i/o */
-	ret = spi_sync(spi, &message);
-	mutex_unlock(&max->io_mutex);
-	return ret;
-}
-
-/* Write a 16b word to the device */
-static int max3110_out(struct uart_max3110 *max, const u16 out)
-{
-	void *buf;
-	u16 *obuf, *ibuf;
-	int ret;
-
-	buf = kzalloc(8, GFP_KERNEL | GFP_DMA);
-	if (!buf)
-		return -ENOMEM;
-
-	obuf = buf;
-	ibuf = buf + 4;
-	*obuf = out;
-	ret = max3110_write_then_read(max, obuf, ibuf, 2, 1);
-	if (ret) {
-		pr_warn("%s: get err msg %d when sending 0x%x\n",
-			__func__, ret, out);
-		goto exit;
-	}
-
-	receive_chars(max, ibuf, 1);
-
-exit:
-	kfree(buf);
-	return ret;
-}
-
-/*
- * This is usually used to read data from SPIC RX FIFO, which doesn't
- * need any delay like flushing character out.
- *
- * Return how many valide bytes are read back
- */
-static int max3110_read_multi(struct uart_max3110 *max)
-{
-	void *buf;
-	u16 *obuf, *ibuf;
-	int ret, blen;
-
-	blen = M3110_RX_FIFO_DEPTH * sizeof(u16);
-	buf = kzalloc(blen * 2, GFP_KERNEL | GFP_DMA);
-	if (!buf)
-		return 0;
-
-	/* tx/rx always have the same length */
-	obuf = buf;
-	ibuf = buf + blen;
-
-	if (max3110_write_then_read(max, obuf, ibuf, blen, 1)) {
-		kfree(buf);
-		return 0;
-	}
-
-	ret = receive_chars(max, ibuf, M3110_RX_FIFO_DEPTH);
-
-	kfree(buf);
-	return ret;
-}
-
-static void serial_m3110_con_putchar(struct uart_port *port, int ch)
-{
-	struct uart_max3110 *max =
-		container_of(port, struct uart_max3110, port);
-	struct circ_buf *xmit = &max->con_xmit;
-
-	if (uart_circ_chars_free(xmit)) {
-		xmit->buf[xmit->head] = (char)ch;
-		xmit->head = (xmit->head + 1) & (PAGE_SIZE - 1);
-	}
-}
-
-/*
- * Print a string to the serial port trying not to disturb
- * any possible real use of the port...
- *
- *	The console_lock must be held when we get here.
- */
-static void serial_m3110_con_write(struct console *co,
-				const char *s, unsigned int count)
-{
-	if (!pmax)
-		return;
-
-	uart_console_write(&pmax->port, s, count, serial_m3110_con_putchar);
-
-	if (!test_and_set_bit(CON_TX_NEEDED, &pmax->uart_flags))
-		wake_up(&pmax->wq);
-}
-
-static int __init
-serial_m3110_con_setup(struct console *co, char *options)
-{
-	struct uart_max3110 *max = pmax;
-	int baud = 115200;
-	int bits = 8;
-	int parity = 'n';
-	int flow = 'n';
-
-	pr_info("setting up console\n");
-
-	if (co->index == -1)
-		co->index = 0;
-
-	if (!max) {
-		pr_err("pmax is NULL, return\n");
-		return -ENODEV;
-	}
-
-	if (options)
-		uart_parse_options(options, &baud, &parity, &bits, &flow);
-
-	return uart_set_options(&max->port, co, baud, parity, bits, flow);
-}
-
-static struct tty_driver *serial_m3110_con_device(struct console *co,
-							int *index)
-{
-	struct uart_driver *p = co->data;
-	*index = co->index;
-	return p->tty_driver;
-}
-
-static struct uart_driver serial_m3110_reg;
-static struct console serial_m3110_console = {
-	.name		= "ttyS",
-	.write		= serial_m3110_con_write,
-	.device		= serial_m3110_con_device,
-	.setup		= serial_m3110_con_setup,
-	.flags		= CON_PRINTBUFFER,
-	.index		= -1,
-	.data		= &serial_m3110_reg,
-};
-
-static unsigned int serial_m3110_tx_empty(struct uart_port *port)
-{
-	return 1;
-}
-
-static void serial_m3110_stop_tx(struct uart_port *port)
-{
-	return;
-}
-
-/* stop_rx will be called in spin_lock env */
-static void serial_m3110_stop_rx(struct uart_port *port)
-{
-	return;
-}
-
-#define WORDS_PER_XFER	128
-static void send_circ_buf(struct uart_max3110 *max,
-				struct circ_buf *xmit)
-{
-	void *buf;
-	u16 *obuf, *ibuf;
-	int i, len, blen, dma_size, left, ret = 0;
-
-
-	dma_size = WORDS_PER_XFER * sizeof(u16) * 2;
-	buf = kzalloc(dma_size, GFP_KERNEL | GFP_DMA);
-	if (!buf)
-		return;
-	obuf = buf;
-	ibuf = buf + dma_size/2;
-
-	while (!uart_circ_empty(xmit)) {
-		left = uart_circ_chars_pending(xmit);
-		while (left) {
-			len = min(left, WORDS_PER_XFER);
-			blen = len * sizeof(u16);
-			memset(ibuf, 0, blen);
-
-			for (i = 0; i < len; i++) {
-				obuf[i] = (u8)xmit->buf[xmit->tail] | WD_TAG;
-				xmit->tail = (xmit->tail + 1) &
-						(UART_XMIT_SIZE - 1);
-			}
-
-			/* Fail to send msg to console is not very critical */
-
-			ret = max3110_write_then_read(max, obuf, ibuf, blen, 0);
-			if (ret)
-				pr_warn("%s: get err msg %d\n", __func__, ret);
-
-			receive_chars(max, ibuf, len);
-
-			max->port.icount.tx += len;
-			left -= len;
-		}
-	}
-
-	kfree(buf);
-}
-
-static void transmit_char(struct uart_max3110 *max)
-{
-	struct uart_port *port = &max->port;
-	struct circ_buf *xmit = &port->state->xmit;
-
-	if (uart_circ_empty(xmit) || uart_tx_stopped(port))
-		return;
-
-	send_circ_buf(max, xmit);
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-
-	if (uart_circ_empty(xmit))
-		serial_m3110_stop_tx(port);
-}
-
-/*
- * This will be called by uart_write() and tty_write, can't
- * go to sleep
- */
-static void serial_m3110_start_tx(struct uart_port *port)
-{
-	struct uart_max3110 *max =
-		container_of(port, struct uart_max3110, port);
-
-	if (!test_and_set_bit(UART_TX_NEEDED, &max->uart_flags))
-		wake_up(&max->wq);
-}
-
-static int
-receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
-{
-	struct uart_port *port = &max->port;
-	struct tty_port *tport;
-	char buf[M3110_RX_FIFO_DEPTH];
-	int r, w, usable;
-
-	/* If uart is not opened, just return */
-	if (!port->state)
-		return 0;
-
-	tport = &port->state->port;
-
-	for (r = 0, w = 0; r < len; r++) {
-		if (str[r] & MAX3110_BREAK &&
-		    uart_handle_break(port))
-			continue;
-
-		if (str[r] & MAX3110_READ_DATA_AVAILABLE) {
-			if (uart_handle_sysrq_char(port, str[r] & 0xff))
-				continue;
-
-			buf[w++] = str[r] & 0xff;
-		}
-	}
-
-	if (!w)
-		return 0;
-
-	for (r = 0; w; r += usable, w -= usable) {
-		usable = tty_buffer_request_room(tport, w);
-		if (usable) {
-			tty_insert_flip_string(tport, buf + r, usable);
-			port->icount.rx += usable;
-		}
-	}
-	tty_flip_buffer_push(tport);
-
-	return r;
-}
-
-/*
- * This routine will be used in read_thread or RX IRQ handling,
- * it will first do one round buffer read(8 words), if there is some
- * valid RX data, will try to read 5 more rounds till all data
- * is read out.
- *
- * Use stack space as data buffer to save some system load, and chose
- * 504 Btyes as a threadhold to do a bulk push to upper tty layer when
- * receiving bulk data, a much bigger buffer may cause stack overflow
- */
-static void max3110_con_receive(struct uart_max3110 *max)
-{
-	int loop = 1, num;
-
-	do {
-		num = max3110_read_multi(max);
-
-		if (num) {
-			loop = 5;
-		}
-	} while (--loop);
-}
-
-static int max3110_main_thread(void *_max)
-{
-	struct uart_max3110 *max = _max;
-	wait_queue_head_t *wq = &max->wq;
-	int ret = 0;
-	struct circ_buf *xmit = &max->con_xmit;
-
-	pr_info("start main thread\n");
-
-	do {
-		wait_event_interruptible(*wq,
-				max->uart_flags || kthread_should_stop());
-
-		mutex_lock(&max->thread_mutex);
-
-		if (test_and_clear_bit(BIT_IRQ_PENDING, &max->uart_flags))
-			max3110_con_receive(max);
-
-		/* first handle console output */
-		if (test_and_clear_bit(CON_TX_NEEDED, &max->uart_flags))
-			send_circ_buf(max, xmit);
-
-		/* handle uart output */
-		if (test_and_clear_bit(UART_TX_NEEDED, &max->uart_flags))
-			transmit_char(max);
-
-		mutex_unlock(&max->thread_mutex);
-
-	} while (!kthread_should_stop());
-
-	return ret;
-}
-
-static irqreturn_t serial_m3110_irq(int irq, void *dev_id)
-{
-	struct uart_max3110 *max = dev_id;
-
-	/* max3110's irq is a falling edge, not level triggered,
-	 * so no need to disable the irq */
-
-	if (!test_and_set_bit(BIT_IRQ_PENDING, &max->uart_flags))
-		wake_up(&max->wq);
-
-	return IRQ_HANDLED;
-}
-
-/* if don't use RX IRQ, then need a thread to polling read */
-static int max3110_read_thread(void *_max)
-{
-	struct uart_max3110 *max = _max;
-
-	pr_info("start read thread\n");
-	do {
-		/*
-		 * If can't acquire the mutex, it means the main thread
-		 * is running which will also perform the rx job
-		 */
-		if (mutex_trylock(&max->thread_mutex)) {
-			max3110_con_receive(max);
-			mutex_unlock(&max->thread_mutex);
-		}
-
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(HZ / 20);
-	} while (!kthread_should_stop());
-
-	return 0;
-}
-
-static int serial_m3110_startup(struct uart_port *port)
-{
-	struct uart_max3110 *max =
-		container_of(port, struct uart_max3110, port);
-	u16 config = 0;
-	int ret = 0;
-
-	if (port->line != 0) {
-		pr_err("uart port startup failed\n");
-		return -1;
-	}
-
-	/* Disable all IRQ and config it to 115200, 8n1 */
-	config = WC_TAG | WC_FIFO_ENABLE
-			| WC_1_STOPBITS
-			| WC_8BIT_WORD
-			| WC_BAUD_DR2;
-
-	/* as we use thread to handle tx/rx, need set low latency */
-	port->state->port.low_latency = 1;
-
-	if (max->irq) {
-		/* Enable RX IRQ only */
-		config |= WC_RXA_IRQ_ENABLE;
-	} else {
-		/* If IRQ is disabled, start a read thread for input data */
-		max->read_thread =
-			kthread_run(max3110_read_thread, max, "max3110_read");
-		if (IS_ERR(max->read_thread)) {
-			ret = PTR_ERR(max->read_thread);
-			max->read_thread = NULL;
-			pr_err("Can't create read thread!\n");
-			return ret;
-		}
-	}
-
-	ret = max3110_out(max, config);
-	if (ret) {
-		if (max->read_thread)
-			kthread_stop(max->read_thread);
-		max->read_thread = NULL;
-		return ret;
-	}
-
-	max->cur_conf = config;
-	return 0;
-}
-
-static void serial_m3110_shutdown(struct uart_port *port)
-{
-	struct uart_max3110 *max =
-		container_of(port, struct uart_max3110, port);
-	u16 config;
-
-	if (max->read_thread) {
-		kthread_stop(max->read_thread);
-		max->read_thread = NULL;
-	}
-
-	/* Disable interrupts from this port */
-	config = WC_TAG | WC_SW_SHDI;
-	max3110_out(max, config);
-}
-
-static void serial_m3110_release_port(struct uart_port *port)
-{
-}
-
-static int serial_m3110_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
-static void serial_m3110_config_port(struct uart_port *port, int flags)
-{
-	port->type = PORT_MAX3100;
-}
-
-static int
-serial_m3110_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
-	/* we don't want the core code to modify any port params */
-	return -EINVAL;
-}
-
-
-static const char *serial_m3110_type(struct uart_port *port)
-{
-	struct uart_max3110 *max =
-		container_of(port, struct uart_max3110, port);
-	return max->name;
-}
-
-static void
-serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios,
-		       struct ktermios *old)
-{
-	struct uart_max3110 *max =
-		container_of(port, struct uart_max3110, port);
-	unsigned char cval;
-	unsigned int baud, parity = 0;
-	int clk_div = -1;
-	u16 new_conf = max->cur_conf;
-
-	switch (termios->c_cflag & CSIZE) {
-	case CS7:
-		cval = UART_LCR_WLEN7;
-		new_conf |= WC_7BIT_WORD;
-		break;
-	default:
-		/* We only support CS7 & CS8 */
-		termios->c_cflag &= ~CSIZE;
-		termios->c_cflag |= CS8;
-	case CS8:
-		cval = UART_LCR_WLEN8;
-		new_conf |= WC_8BIT_WORD;
-		break;
-	}
-
-	baud = uart_get_baud_rate(port, termios, old, 0, 230400);
-
-	/* First calc the div for 1.8MHZ clock case */
-	switch (baud) {
-	case 300:
-		clk_div = WC_BAUD_DR384;
-		break;
-	case 600:
-		clk_div = WC_BAUD_DR192;
-		break;
-	case 1200:
-		clk_div = WC_BAUD_DR96;
-		break;
-	case 2400:
-		clk_div = WC_BAUD_DR48;
-		break;
-	case 4800:
-		clk_div = WC_BAUD_DR24;
-		break;
-	case 9600:
-		clk_div = WC_BAUD_DR12;
-		break;
-	case 19200:
-		clk_div = WC_BAUD_DR6;
-		break;
-	case 38400:
-		clk_div = WC_BAUD_DR3;
-		break;
-	case 57600:
-		clk_div = WC_BAUD_DR2;
-		break;
-	case 115200:
-		clk_div = WC_BAUD_DR1;
-		break;
-	case 230400:
-		if (max->clock & MAX3110_HIGH_CLK)
-			break;
-	default:
-		/* Pick the previous baud rate */
-		baud = max->baud;
-		clk_div = max->cur_conf & WC_BAUD_DIV_MASK;
-		tty_termios_encode_baud_rate(termios, baud, baud);
-	}
-
-	if (max->clock & MAX3110_HIGH_CLK) {
-		clk_div += 1;
-		/* High clk version max3110 doesn't support B300 */
-		if (baud == 300) {
-			baud = 600;
-			clk_div = WC_BAUD_DR384;
-		}
-		if (baud == 230400)
-			clk_div = WC_BAUD_DR1;
-		tty_termios_encode_baud_rate(termios, baud, baud);
-	}
-
-	new_conf = (new_conf & ~WC_BAUD_DIV_MASK) | clk_div;
-
-	if (unlikely(termios->c_cflag & CMSPAR))
-		termios->c_cflag &= ~CMSPAR;
-
-	if (termios->c_cflag & CSTOPB)
-		new_conf |= WC_2_STOPBITS;
-	else
-		new_conf &= ~WC_2_STOPBITS;
-
-	if (termios->c_cflag & PARENB) {
-		new_conf |= WC_PARITY_ENABLE;
-		parity |= UART_LCR_PARITY;
-	} else
-		new_conf &= ~WC_PARITY_ENABLE;
-
-	if (!(termios->c_cflag & PARODD))
-		parity |= UART_LCR_EPAR;
-	max->parity = parity;
-
-	uart_update_timeout(port, termios->c_cflag, baud);
-
-	new_conf |= WC_TAG;
-	if (new_conf != max->cur_conf) {
-		if (!max3110_out(max, new_conf)) {
-			max->cur_conf = new_conf;
-			max->baud = baud;
-		}
-	}
-}
-
-/* Don't handle hw handshaking */
-static unsigned int serial_m3110_get_mctrl(struct uart_port *port)
-{
-	return TIOCM_DSR | TIOCM_CAR | TIOCM_DSR;
-}
-
-static void serial_m3110_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-}
-
-static void serial_m3110_break_ctl(struct uart_port *port, int break_state)
-{
-}
-
-static void serial_m3110_pm(struct uart_port *port, unsigned int state,
-			unsigned int oldstate)
-{
-}
-
-static struct uart_ops serial_m3110_ops = {
-	.tx_empty	= serial_m3110_tx_empty,
-	.set_mctrl	= serial_m3110_set_mctrl,
-	.get_mctrl	= serial_m3110_get_mctrl,
-	.stop_tx	= serial_m3110_stop_tx,
-	.start_tx	= serial_m3110_start_tx,
-	.stop_rx	= serial_m3110_stop_rx,
-	.break_ctl	= serial_m3110_break_ctl,
-	.startup	= serial_m3110_startup,
-	.shutdown	= serial_m3110_shutdown,
-	.set_termios	= serial_m3110_set_termios,
-	.pm		= serial_m3110_pm,
-	.type		= serial_m3110_type,
-	.release_port	= serial_m3110_release_port,
-	.request_port	= serial_m3110_request_port,
-	.config_port	= serial_m3110_config_port,
-	.verify_port	= serial_m3110_verify_port,
-};
-
-static struct uart_driver serial_m3110_reg = {
-	.owner		= THIS_MODULE,
-	.driver_name	= "MRST serial",
-	.dev_name	= "ttyS",
-	.major		= TTY_MAJOR,
-	.minor		= 64,
-	.nr		= 1,
-	.cons		= &serial_m3110_console,
-};
-
-#ifdef CONFIG_PM_SLEEP
-static int serial_m3110_suspend(struct device *dev)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	struct uart_max3110 *max = spi_get_drvdata(spi);
-
-	if (max->irq > 0)
-		disable_irq(max->irq);
-	uart_suspend_port(&serial_m3110_reg, &max->port);
-	max3110_out(max, max->cur_conf | WC_SW_SHDI);
-	return 0;
-}
-
-static int serial_m3110_resume(struct device *dev)
-{
-	struct spi_device *spi = to_spi_device(dev);
-	struct uart_max3110 *max = spi_get_drvdata(spi);
-
-	max3110_out(max, max->cur_conf);
-	uart_resume_port(&serial_m3110_reg, &max->port);
-	if (max->irq > 0)
-		enable_irq(max->irq);
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(serial_m3110_pm_ops, serial_m3110_suspend,
-			serial_m3110_resume);
-#define SERIAL_M3110_PM_OPS (&serial_m3110_pm_ops)
-
-#else
-#define SERIAL_M3110_PM_OPS NULL
-#endif
-
-static int serial_m3110_probe(struct spi_device *spi)
-{
-	struct uart_max3110 *max;
-	void *buffer;
-	u16 res;
-	int ret = 0;
-
-	max = kzalloc(sizeof(*max), GFP_KERNEL);
-	if (!max)
-		return -ENOMEM;
-
-	/* Set spi info */
-	spi->bits_per_word = 16;
-	max->clock = MAX3110_HIGH_CLK;
-
-	spi_setup(spi);
-
-	max->port.type = PORT_MAX3100;
-	max->port.fifosize = 2;		/* Only have 16b buffer */
-	max->port.ops = &serial_m3110_ops;
-	max->port.line = 0;
-	max->port.dev = &spi->dev;
-	max->port.uartclk = 115200;
-
-	max->spi = spi;
-	strcpy(max->name, spi->modalias);
-	max->irq = (u16)spi->irq;
-
-	mutex_init(&max->thread_mutex);
-	mutex_init(&max->io_mutex);
-
-	max->word_7bits = 0;
-	max->parity = 0;
-	max->baud = 0;
-
-	max->cur_conf = 0;
-	max->uart_flags = 0;
-
-	/* Check if reading configuration register returns something sane */
-
-	res = RC_TAG;
-	ret = max3110_write_then_read(max, (u8 *)&res, (u8 *)&res, 2, 0);
-	if (ret < 0 || res == 0 || res == 0xffff) {
-		dev_dbg(&spi->dev, "MAX3111 deemed not present (conf reg %04x)",
-									res);
-		ret = -ENODEV;
-		goto err_get_page;
-	}
-
-	buffer = (void *)__get_free_page(GFP_KERNEL);
-	if (!buffer) {
-		ret = -ENOMEM;
-		goto err_get_page;
-	}
-	max->con_xmit.buf = buffer;
-	max->con_xmit.head = 0;
-	max->con_xmit.tail = 0;
-
-	init_waitqueue_head(&max->wq);
-
-	max->main_thread = kthread_run(max3110_main_thread,
-					max, "max3110_main");
-	if (IS_ERR(max->main_thread)) {
-		ret = PTR_ERR(max->main_thread);
-		goto err_kthread;
-	}
-
-	if (max->irq) {
-		ret = request_irq(max->irq, serial_m3110_irq,
-				IRQ_TYPE_EDGE_FALLING, "max3110", max);
-		if (ret) {
-			max->irq = 0;
-			dev_warn(&spi->dev,
-			"unable to allocate IRQ, will use polling method\n");
-		}
-	}
-
-	spi_set_drvdata(spi, max);
-	pmax = max;
-
-	/* Give membase a psudo value to pass serial_core's check */
-	max->port.membase = (unsigned char __iomem *)0xff110000;
-	uart_add_one_port(&serial_m3110_reg, &max->port);
-
-	return 0;
-
-err_kthread:
-	free_page((unsigned long)buffer);
-err_get_page:
-	kfree(max);
-	return ret;
-}
-
-static int serial_m3110_remove(struct spi_device *dev)
-{
-	struct uart_max3110 *max = spi_get_drvdata(dev);
-
-	if (!max)
-		return 0;
-
-	uart_remove_one_port(&serial_m3110_reg, &max->port);
-
-	free_page((unsigned long)max->con_xmit.buf);
-
-	if (max->irq)
-		free_irq(max->irq, max);
-
-	if (max->main_thread)
-		kthread_stop(max->main_thread);
-
-	kfree(max);
-	return 0;
-}
-
-static struct spi_driver uart_max3110_driver = {
-	.driver = {
-			.name	= "spi_max3111",
-			.owner	= THIS_MODULE,
-			.pm	= SERIAL_M3110_PM_OPS,
-	},
-	.probe		= serial_m3110_probe,
-	.remove		= serial_m3110_remove,
-};
-
-static int __init serial_m3110_init(void)
-{
-	int ret = 0;
-
-	ret = uart_register_driver(&serial_m3110_reg);
-	if (ret)
-		return ret;
-
-	ret = spi_register_driver(&uart_max3110_driver);
-	if (ret)
-		uart_unregister_driver(&serial_m3110_reg);
-
-	return ret;
-}
-
-static void __exit serial_m3110_exit(void)
-{
-	spi_unregister_driver(&uart_max3110_driver);
-	uart_unregister_driver(&serial_m3110_reg);
-}
-
-module_init(serial_m3110_init);
-module_exit(serial_m3110_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:max3110-uart");