path: root/target/linux/storm/patches/008-serial.patch

--- /dev/null
+++ b/drivers/serial/it8712.c
@@ -0,0 +1,858 @@
+/*
+ *  linux/drivers/char/serial_uart00.c
+ *
+ *  Driver for UART00 serial ports
+ *
+ *  Based on drivers/char/serial_amba.c, by ARM Limited &
+ *                                          Deep Blue Solutions Ltd.
+ *  Copyright 2001 Altera Corporation
+ *
+ * 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
+ *
+ *  $Id: it8712.c,v 1.2 2006/06/06 06:36:04 middle Exp $
+ *
+ */
+#include <linux/module.h>
+#include <linux/tty.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/serial.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <asm/hardware.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
+#include <asm/sizes.h>
+
+#if defined(CONFIG_SERIAL_IT8712_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <linux/serial_core.h>
+#include <asm/arch/sl2312.h>
+#include <asm/arch/int_ctrl.h>
+#include <asm/arch/it8712.h>
+#include "it8712.h"
+
+//#define DEBUG           1
+#define UART_NR		1
+
+#define SERIAL_IT8712_NAME	"ttySI"
+#define SERIAL_IT8712_MAJOR	204
+#define SERIAL_IT8712_MINOR	41      /* Temporary - will change in future */
+#define SERIAL_IT8712_NR	UART_NR
+#define UART_PORT_SIZE 0x50
+#define LPC_HOST_CONTINUE_MODE	0x00000040
+
+#define IT8712_NO_PORTS         UART_NR
+#define IT8712_ISR_PASS_LIMIT	256
+
+#define LPC_BUS_CTRL	*(unsigned int*)(IO_ADDRESS(SL2312_LPC_HOST_BASE + 4))
+#define LPC_BUS_STATUS	*(unsigned int*)(IO_ADDRESS(SL2312_LPC_HOST_BASE + 4))
+#define LPC_SERIAL_IRQ_CTRL	*(unsigned int*)(IO_ADDRESS(SL2312_LPC_HOST_BASE + 8))
+#define LPC_SERIAL_IRQ_STATUS	*(unsigned int*)(IO_ADDRESS(SL2312_LPC_HOST_BASE + 0x0c))
+#define LPC_SERIAL_IRQ_TRITYPE *(unsigned int*)(IO_ADDRESS(SL2312_LPC_HOST_BASE + 0x10))
+#define LPC_SERIAL_IRQ_POLARITY	*(unsigned int*)(IO_ADDRESS(SL2312_LPC_HOST_BASE + 0x14))
+#define LPC_SERIAL_IRQ_ENABLE	*(unsigned int*)(IO_ADDRESS(SL2312_LPC_HOST_BASE + 0x18))
+
+
+
+
+/*
+ * Access macros for the SL2312 UARTs
+ */
+#define UART_GET_INT_STATUS(p)	(inb(((p)->membase+UART_IIR)) & 0x0F)  // interrupt identification
+#define UART_PUT_IER(p, c)      outb(c,((p)->membase+UART_IER))         // interrupt enable
+#define UART_GET_IER(p)         inb(((p)->membase+UART_IER))
+#define UART_PUT_CHAR(p, c)     outb(c,((p)->membase+UART_TX))         // transmitter holding
+#define UART_GET_CHAR(p)        inb(((p)->membase+UART_RX))            // receive buffer
+#define UART_GET_LSR(p)         inb(((p)->membase+UART_LSR))            // line status
+#define UART_GET_MSR(p)         inb(((p)->membase+UART_MSR))            // modem status
+#define UART_GET_MCR(p)         inb(((p)->membase+UART_MCR))            // modem control
+#define UART_PUT_MCR(p, c)      outb(c,((p)->membase+UART_MCR))
+#define UART_GET_LCR(p)         inb(((p)->membase+UART_LCR))       // mode control
+#define UART_PUT_LCR(p, c)      outb(c,((p)->membase+UART_LCR))
+#define UART_PUT_FCR(p, c)      outb(c,((p)->membase+UART_FCR))       // fifo control
+#define UART_GET_DIV_HI(p)	inb(((p)->membase+UART_DLM))
+#define UART_PUT_DIV_HI(p, c)	outb(c,((p)->membase+UART_DLM))
+#define UART_GET_DIV_LO(p)	inb(((p)->membase+UART_DLL))
+#define UART_PUT_DIV_LO(p, c)	outb(c,((p)->membase+UART_DLL))
+#define UART_PUT_MDR(p, c)      outb(c,UART_MDR((p)->membase))
+#define UART_RX_DATA(s)		((s) & UART_LSR_DR)
+#define UART_TX_READY(s)	((s) & UART_LSR_THRE)
+
+static void it8712_stop_tx(struct uart_port *port, u_int from_tty)
+{
+        unsigned int reg;
+
+        //printk("it8712 stop tx : \n");
+        reg = UART_GET_IER(port);
+        reg &= ~(UART_IER_THRI);
+	UART_PUT_IER(port, reg);
+}
+
+static void it8712_stop_rx(struct uart_port *port)
+{
+        unsigned int reg;
+
+        //printk("it8712 stop rx : \n");
+        reg = UART_GET_IER(port);
+        reg &= ~(UART_IER_RDI);
+	UART_PUT_IER(port, reg);
+
+}
+
+static void it8712_enable_ms(struct uart_port *port)
+{
+        unsigned int reg;
+
+        //printk("it8712 enable ms : \n");
+
+        reg = UART_GET_IER(port);
+        reg |= (UART_IER_MSI);
+	UART_PUT_IER(port, reg);
+
+}
+
+static void it8712_rx_chars(struct uart_port *port, struct pt_regs *regs)
+{
+	struct tty_struct *tty = port->info->tty;
+	unsigned int status, mask, ch, flg, ignored = 0;
+
+ //       printk("it8712_rx_chars : \n");
+	status = UART_GET_LSR(port);
+	while (UART_RX_DATA(status)) {
+
+		/*
+		 * We need to read rds before reading the
+		 * character from the fifo
+		 */
+		ch = UART_GET_CHAR(port);
+		port->icount.rx++;
+
+		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+			goto ignore_char;
+
+		flg = TTY_NORMAL;
+
+		/*
+		 * Note that the error handling code is
+		 * out of the main execution path
+		 */
+
+		if (status & (UART_LSR_OE|UART_LSR_PE|UART_LSR_FE|UART_LSR_BI|UART_LSR_DE))
+			goto handle_error;
+		if (uart_handle_sysrq_char(port, ch, regs))
+			goto ignore_char;
+
+	error_return:
+		*tty->flip.flag_buf_ptr++ = flg;
+		*tty->flip.char_buf_ptr++ = ch;
+		tty->flip.count++;
+	ignore_char:
+		status = UART_GET_LSR(port);
+	} // end of while
+out:
+	tty_flip_buffer_push(tty);
+	return;
+
+handle_error:
+	if (status & UART_LSR_BI) {
+		status &= ~(UART_LSR_FE);
+		port->icount.brk++;
+
+#ifdef SUPPORT_SYSRQ
+		if (uart_handle_break(port))
+			goto ignore_char;
+#endif
+	} else if (status & UART_LSR_PE)
+		port->icount.parity++;
+	else if (status & UART_LSR_FE)
+		port->icount.frame++;
+
+	if (status & UART_LSR_OE)
+		port->icount.overrun++;
+
+	if (status & port->ignore_status_mask) {
+		if (++ignored > 100)
+			goto out;
+		goto ignore_char;
+	}
+
+	mask = status & port->read_status_mask;
+
+	if (mask & UART_LSR_BI)
+		flg = TTY_BREAK;
+	else if (mask & UART_LSR_PE)
+		flg = TTY_PARITY;
+	else if (mask & UART_LSR_FE)
+		flg = TTY_FRAME;
+
+	if (status & UART_LSR_OE) {
+		/*
+		 * CHECK: does overrun affect the current character?
+		 * ASSUMPTION: it does not.
+		 */
+		*tty->flip.flag_buf_ptr++ = flg;
+		*tty->flip.char_buf_ptr++ = ch;
+		tty->flip.count++;
+		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+			goto ignore_char;
+		ch = 0;
+		flg = TTY_OVERRUN;
+	}
+#ifdef SUPPORT_SYSRQ
+	port->sysrq = 0;
+#endif
+	goto error_return;
+}
+
+static void it8712_tx_chars(struct uart_port *port)
+{
+        struct circ_buf *xmit = &port->info->xmit;
+	int count;
+
+	if (port->x_char) {
+		while(!(UART_GET_LSR(port)&UART_LSR_THRE));
+		UART_PUT_CHAR(port, port->x_char);
+		port->icount.tx++;
+		port->x_char = 0;
+
+		return;
+	}
+	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+		it8712_stop_tx(port, 0);
+		return;
+	}
+
+	count = port->fifosize >> 1;
+	do {
+		while(!(UART_GET_LSR(port)&UART_LSR_THRE));
+		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;
+	} while (--count > 0);
+
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(port);
+
+	if (uart_circ_empty(xmit))
+		it8712_stop_tx(port, 0);
+}
+
+static void it8712_start_tx(struct uart_port *port, unsigned int tty_start)
+{
+        unsigned int reg;
+
+        //printk("it8712 start tx : \n");
+        reg = UART_GET_IER(port);
+        reg |= (UART_IER_THRI);
+	UART_PUT_IER(port, reg);
+	it8712_tx_chars(port);
+}
+
+static void it8712_modem_status(struct uart_port *port)
+{
+	unsigned int status;
+
+//        printk("it8712 modem status : \n");
+
+	status = UART_GET_MSR(port);
+
+	if (!(status & (UART_MSR_DCTS | UART_MSR_DDSR |
+		       UART_MSR_TERI | UART_MSR_DDCD)))
+		return;
+
+        if (status & UART_MSR_DDCD)
+                uart_handle_dcd_change(port, status & UART_MSR_DCD);
+
+        if (status & UART_MSR_DDSR)
+                port->icount.dsr++;
+
+        if (status & UART_MSR_DCTS)
+                uart_handle_cts_change(port, status & UART_MSR_CTS);
+
+	wake_up_interruptible(&port->info->delta_msr_wait);
+
+}
+
+static irqreturn_t  it8712_int(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct uart_port *port = dev_id;
+	unsigned int status, pass_counter = 0, data;
+
+
+		data = LPC_SERIAL_IRQ_STATUS;
+	if((data&0x10)==0x10)
+	{
+		status = UART_GET_INT_STATUS(port);
+		do {
+//			     printk("it8712_int: status %x \n", status);
+			switch(status)
+			{
+			   case UART_IIR_RDI:
+			   case UART_IIR_RLSI:
+			   case UART_IIR_RCTO:
+				it8712_rx_chars(port, regs);
+			   break;
+			   case UART_IIR_THRI:
+				it8712_tx_chars(port);
+			   break;
+			   case UART_IIR_MSI:
+				it8712_modem_status(port);
+			   break;
+			   default:
+			   break;
+			}
+			if (pass_counter++ > IT8712_ISR_PASS_LIMIT)
+				break;
+
+			status = UART_GET_INT_STATUS(port);
+		} while (status);
+	}
+
+		status = 0;
+        status |= (IRQ_LPC_MASK);
+        *((volatile unsigned int *)IRQ_CLEAR(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = status;
+
+	//cnt=0;
+	//do{
+	//	data = LPC_SERIAL_IRQ_STATUS;
+		LPC_SERIAL_IRQ_STATUS = data;
+	//	cnt++;
+	//}while(data);
+	//if(cnt>2)
+	//	printf("it8712_uart_Isr clear LPC_SERIAL_IRQ_STATUS %x \n", cnt);
+        return IRQ_HANDLED;
+}
+
+static u_int it8712_tx_empty(struct uart_port *port)
+{
+//        printk("it8712 tx empty : \n");
+
+	return ((UART_GET_LSR(port) & UART_LSR_THRE)? TIOCSER_TEMT : 0);
+}
+
+static u_int it8712_get_mctrl(struct uart_port *port)
+{
+	unsigned int result = 0;
+	unsigned int status;
+
+//        printk("it8712 get mctrl : \n");
+
+	status = UART_GET_MSR(port);
+	if (status & UART_MSR_DCD)
+		result |= TIOCM_CAR;
+	if (status & UART_MSR_DSR)
+		result |= TIOCM_DSR;
+	if (status & UART_MSR_CTS)
+		result |= TIOCM_CTS;
+	if (status & UART_MSR_RI)
+		result |= TIOCM_RI;
+
+	return result;
+}
+
+static void it8712_set_mctrl_null(struct uart_port *port, u_int mctrl)
+{
+}
+
+static void it8712_break_ctl(struct uart_port *port, int break_state)
+{
+	unsigned int lcr;
+
+//        printk("it8712 break ctl : \n");
+
+	lcr = UART_GET_LCR(port);
+	if (break_state == -1)
+		lcr |= UART_LCR_SBC;
+	else
+		lcr &= ~UART_LCR_SBC;
+	UART_PUT_LCR(port, lcr);
+}
+
+static inline u_int uart_calculate_quot(struct uart_port *port, u_int baud)
+{
+	u_int quot;
+
+	/* Special case: B0 rate */
+	if (!baud)
+		baud = 9600;
+
+	quot = (port->uartclk/(16 * baud)) ;
+
+	return quot;
+}
+static void it8712_set_termios(struct uart_port *port, struct termios *termios,
+                               struct termios *old)
+{
+	unsigned int  uart_mc, old_ier, baud, quot;
+	unsigned long flags;
+
+        termios->c_cflag |= CREAD;
+        termios->c_cflag |= CLOCAL;
+#ifdef DEBUG
+	printk("it8712_set_cflag(0x%x) called\n", cflag);
+#endif
+        baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
+        quot = uart_get_divisor(port, baud);
+
+	/* byte size and parity */
+	switch (termios->c_cflag & CSIZE) {
+	case CS5:
+              uart_mc = UART_LCR_WLEN5;
+              break;
+	case CS6:
+              uart_mc = UART_LCR_WLEN6;
+              break;
+	case CS7:
+              uart_mc = UART_LCR_WLEN7;
+              break;
+	default: // CS8
+              uart_mc = UART_LCR_WLEN8;
+              break;
+	}
+
+	if (termios->c_cflag & CSTOPB)
+		uart_mc|= UART_LCR_STOP;
+	if (termios->c_cflag & PARENB) {
+		uart_mc |= UART_LCR_EVEN;
+		if (!(termios->c_cflag & PARODD))
+			uart_mc |= UART_LCR_ODD;
+	}
+
+        spin_lock_irqsave(&port->lock, flags);
+        /*
+         * Update the per-port timeout
+         */
+        uart_update_timeout(port, termios->c_cflag, baud);
+	port->read_status_mask = UART_LSR_OE;
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (termios->c_iflag & (BRKINT | PARMRK))
+		port->read_status_mask |= UART_LSR_BI;
+
+	/*
+	 * Characters to ignore
+	 */
+	port->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (termios->c_iflag & IGNBRK) {
+		port->ignore_status_mask |= UART_LSR_BI;
+		/*
+		 * If we're ignoring parity and break indicators,
+		 * ignore overruns to (for real raw support).
+		 */
+		if (termios->c_iflag & IGNPAR)
+			port->ignore_status_mask |= UART_LSR_OE;
+	}
+
+	old_ier = UART_GET_IER(port);
+
+        if(UART_ENABLE_MS(port, termios->c_cflag))
+             old_ier |= UART_IER_MSI;
+
+	/* Set baud rate */
+	quot = quot / 13;
+	UART_PUT_LCR(port, UART_LCR_DLAB);
+	UART_PUT_DIV_LO(port, (quot & 0xff));
+	UART_PUT_DIV_HI(port, ((quot & 0xf00) >> 8));
+
+	UART_PUT_LCR(port, uart_mc);
+//	UART_PUT_LCR(port, 0x07); // ???? it is wired
+        UART_PUT_MCR(port, 0x08);
+        UART_PUT_FCR(port, 0x01);
+	UART_PUT_IER(port, 0x07);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static int it8712_startup(struct uart_port *port)
+{
+	int retval, i;
+	unsigned int regs;
+
+        //printk("it8712 startup : \n");
+
+	/*
+	 * Use iobase to store a pointer to info. We need this to start a
+	 * transmission as the tranmittr interrupt is only generated on
+	 * the transition to the idle state
+	 */
+
+	//	regs = 0;
+    //    regs |= (IRQ_LPC_MASK);
+    //    *((volatile unsigned int *)IRQ_CLEAR(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = regs;
+
+	/*
+	 * Allocate the IRQ
+	 */
+	retval = request_irq(port->irq, it8712_int, SA_INTERRUPT, "it8712", port);
+	if (retval)
+		return retval;
+
+	//printk("Init LPC int...........\n");
+        /* setup interrupt controller  */
+        regs = *((volatile unsigned int *)IRQ_TMODE(IO_ADDRESS(SL2312_INTERRUPT_BASE)));
+        regs &= ~(IRQ_LPC_MASK);
+        *((volatile unsigned int *)IRQ_TMODE(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = regs;
+        regs = *((volatile unsigned int *)IRQ_TLEVEL(IO_ADDRESS(SL2312_INTERRUPT_BASE)));
+        regs &= ~(IRQ_LPC_MASK);
+        *((volatile unsigned int *)IRQ_TLEVEL(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = regs;
+        *((volatile unsigned int *)IRQ_MASK(IO_ADDRESS(SL2312_INTERRUPT_BASE))) |= (unsigned int)(IRQ_LPC_MASK);
+
+	LPC_SERIAL_IRQ_POLARITY = 0x10; //0x10; //0x02;
+	LPC_SERIAL_IRQ_TRITYPE = 0x10; //0x10;//
+	LPC_SERIAL_IRQ_ENABLE = 0x10;
+
+	LPC_BUS_CTRL = 0xc0;
+	LPC_SERIAL_IRQ_CTRL = 0xc0;
+	for(i=0;i<1000;i++) ;
+	LPC_SERIAL_IRQ_CTRL = 0x80;
+	/*
+	 * Finally, enable interrupts. Use the TII interrupt to minimise
+	 * the number of interrupts generated. If higher performance is
+	 * needed, consider using the TI interrupt with a suitable FIFO
+	 * threshold
+	 */
+	//UART_PUT_IER(port, (UART_IER_RDI|UART_IER_THRI));
+	UART_PUT_IER(port, (UART_IER_RDI|UART_IER_THRI|UART_IER_RLSI));//middle
+
+	return 0;
+}
+
+static void it8712_shutdown(struct uart_port *port)
+{
+        //printk("it8712 shutdown : \n");
+
+	/*
+	 * disable all interrupts, disable the port
+	 */
+	UART_PUT_IER(port, 0x0);
+
+	/* disable break condition and fifos */
+//	UART_PUT_MCR(port, (UART_GET_MCR(port)&UART_MCR_MASK));
+
+	/*
+	 * Free the interrupt
+	 */
+	free_irq(port->irq, port);
+}
+
+static const char *it8712_type(struct uart_port *port)
+{
+	return port->type == PORT_IT8712 ? "IT8712" : NULL;
+}
+
+/*
+ * Release the memory region(s) being used by 'port'
+ */
+static void it8712_release_port(struct uart_port *port)
+{
+//        printk("it8712 release port : \n");
+
+	release_mem_region(port->mapbase, UART_PORT_SIZE);
+}
+
+/*
+ * Request the memory region(s) being used by 'port'
+ */
+static int it8712_request_port(struct uart_port *port)
+{
+	return request_mem_region(port->mapbase, UART_PORT_SIZE,
+				    "serial_it8712") != NULL ? 0 : -EBUSY;
+}
+
+/*
+ * Configure/autoconfigure the port.
+ */
+static void it8712_config_port(struct uart_port *port, int flags)
+{
+
+	if (flags & UART_CONFIG_TYPE) {
+		if (it8712_request_port(port) == 0)
+			port->type = PORT_IT8712;
+	}
+}
+
+/*
+ * verify the new serial_struct (for TIOCSSERIAL).
+ */
+static int it8712_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+	int ret = 0;
+
+	if (ser->type != PORT_UNKNOWN && ser->type != PORT_UART00)
+		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 it8712_pops = {
+	.tx_empty	= it8712_tx_empty,
+	.set_mctrl	= it8712_set_mctrl_null,
+	.get_mctrl	= it8712_get_mctrl,
+	.stop_tx	= it8712_stop_tx,
+	.start_tx	= it8712_start_tx,
+	.stop_rx	= it8712_stop_rx,
+	.enable_ms	= it8712_enable_ms,
+	.break_ctl	= it8712_break_ctl,
+	.startup	= it8712_startup,
+	.shutdown	= it8712_shutdown,
+	.set_termios	= it8712_set_termios,
+	.type		= it8712_type,
+	.release_port	= it8712_release_port,
+	.request_port	= it8712_request_port,
+	.config_port	= it8712_config_port,
+	.verify_port	= it8712_verify_port,
+};
+
+#ifdef CONFIG_ARCH_SL2312
+
+static struct uart_port it8712_ports[UART_NR] = {
+	{
+		membase:	(void *)0,
+		mapbase:	0,
+		iotype:		SERIAL_IO_MEM,
+		irq:		0,
+		uartclk:	UART_CLK/2,
+		fifosize:	16,
+		ops:		&it8712_pops,
+		flags:		ASYNC_BOOT_AUTOCONF,
+	}
+};
+
+#endif
+
+#ifdef CONFIG_SERIAL_IT8712_CONSOLE
+#ifdef used_and_not_const_char_pointer
+static int it8712_console_read(struct uart_port *port, char *s, u_int count)
+{
+	unsigned int status;
+	int c;
+#ifdef DEBUG
+	printk("it8712_console_read() called\n");
+#endif
+
+	c = 0;
+	while (c < count) {
+		status = UART_GET_LSR(port);
+ 		if (UART_RX_DATA(status)) {
+			*s++ = UART_GET_CHAR(port);
+			c++;
+		} else {
+			// nothing more to get, return
+			return c;
+		}
+	}
+	// return the count
+	return c;
+}
+#endif
+static void it8712_console_write(struct console *co, const char *s, unsigned count)
+{
+#ifdef CONFIG_ARCH_SL2312
+	struct uart_port *port = it8712_ports + co->index;
+	unsigned int status, old_ies;
+	int i;
+
+	/*
+	 *	First save the CR then disable the interrupts
+	 */
+	old_ies = UART_GET_IER(port);
+	//if(old_ies!=7)
+	//{
+	//
+	//	printk("old_ies = %x\n",old_ies);
+	//	old_ies = 7;
+	//}
+	UART_PUT_IER(port,0x0);
+
+	/*
+	 *	Now, do each character
+	 */
+	for (i = 0; i < count; i++) {
+		do {
+			status = UART_GET_LSR(port);
+		} while (!UART_TX_READY(status));
+		UART_PUT_CHAR(port, s[i]);
+		if (s[i] == '\n') {
+			do {
+				status = UART_GET_LSR(port);
+			} while (!UART_TX_READY(status));
+			UART_PUT_CHAR(port, '\r');
+		}
+	}
+
+	/*
+	 *	Finally, wait for transmitter to become empty
+	 *	and restore the IES
+	 */
+	do {
+		status = UART_GET_LSR(port);
+	} while (!(status&UART_LSR_THRE));
+	UART_PUT_IER(port, old_ies);
+#endif
+}
+
+static void /*__init*/ it8712_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
+{
+	//printk("it8712 console get options : \n");
+
+	u_int uart_mc, quot;
+	uart_mc= UART_GET_MCR(port);
+
+	*parity = 'n';
+	if (uart_mc & UART_LCR_PARITY) {
+		if (uart_mc & UART_LCR_EVEN)
+			*parity = 'e';
+		else
+			*parity = 'o';
+	}
+
+	switch (uart_mc & UART_LCR_MSK){
+
+	case UART_LCR_WLEN5:
+		*bits = 5;
+		break;
+	case UART_LCR_WLEN6:
+		*bits = 6;
+		break;
+	case UART_LCR_WLEN7:
+		*bits = 7;
+		break;
+	case UART_LCR_WLEN8:
+		*bits = 8;
+		break;
+	}
+	UART_PUT_MCR(port,UART_LCR_DLAB);
+	quot = UART_GET_DIV_LO(port) | (UART_GET_DIV_HI(port) << 8);
+	UART_PUT_MCR(port,uart_mc);
+	*baud = (port->uartclk / (16 *quot));
+}
+
+static int __init it8712_console_setup(struct console *co, char *options)
+{
+	struct uart_port *port;
+	int baud = 38400;
+	int bits = 8;
+	int parity = 'n';
+	int flow= 'n';
+	int base;//, irq;
+	int i ;
+
+	printk("it8712 console setup : \n");
+
+	LPCSetConfig(0, 0x02, 0x01);
+        LPCSetConfig(LDN_SERIAL1, 0x30, 0x1);
+        LPCSetConfig(LDN_SERIAL1, 0x23, 0x0);
+	base = IT8712_IO_BASE;
+	base += ((LPCGetConfig(LDN_SERIAL1, 0x60) << 8) + LPCGetConfig(LDN_SERIAL1, 0x61));
+	it8712_ports[0].mapbase = base;
+	it8712_ports[0].membase = (void *)IO_ADDRESS(base);
+	it8712_ports[0].irq = IRQ_LPC_OFFSET;
+    //   	irq = LPCGetConfig(LDN_SERIAL1, 0x70);
+	//it8712_ports[0].irq += irq;
+
+	//printk("it8712 irq is %x \n", it8712_ports[0].irq);
+
+	// setup LPC Host 'quiet mode'
+	//*((volatile unsigned int *)IO_ADDRESS((SL2312_LPC_HOST_BASE+0x04))) |= LPC_HOST_CONTINUE_MODE ;
+	//for(i=0;i<1000;i++) ;						// delay
+	//*((volatile unsigned int *)IO_ADDRESS((SL2312_LPC_HOST_BASE+0x04))) &= ~(LPC_HOST_CONTINUE_MODE) ;
+	LPC_BUS_CTRL = 0xc0;
+	LPC_SERIAL_IRQ_CTRL = 0xc0;
+	for(i=0;i<1000;i++) ;
+	LPC_SERIAL_IRQ_CTRL = 0x80;
+
+#ifdef CONFIG_ARCH_SL2312
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	port = uart_get_console(it8712_ports,IT8712_NO_PORTS,co);
+#else
+	return -ENODEV;
+#endif
+
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+	else
+		it8712_console_get_options(port, &baud, &parity, &bits);
+
+	return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+extern struct uart_driver it8712_reg;
+static struct console it8712_console = {
+	.name           = SERIAL_IT8712_NAME,
+	.write		= it8712_console_write,
+	.device		= uart_console_device,
+        .setup          = it8712_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= 0,
+        .data           = &it8712_reg,
+};
+
+static int __init it8712_console_init(void)
+{
+	register_console(&it8712_console);
+        return 0;
+}
+
+console_initcall(it8712_console_init);
+
+#define IT8712_CONSOLE	&it8712_console
+#else
+#define IT8712_CONSOLE	NULL
+#endif
+
+static struct uart_driver it8712_reg = {
+	.owner                  = NULL,
+	.driver_name		= SERIAL_IT8712_NAME,
+	.dev_name		= SERIAL_IT8712_NAME,
+        .major                  = SERIAL_IT8712_MAJOR,
+	.minor			= SERIAL_IT8712_MINOR,
+	.nr			= UART_NR,
+	.cons			= IT8712_CONSOLE,
+};
+
+static int __init it8712_init(void)
+{
+        int result;
+	//printk("serial_it8712: it871212_init \n");
+
+
+        result = uart_register_driver(&it8712_reg);
+        if(result)
+             return result;
+	result = uart_add_one_port(&it8712_reg, &it8712_ports[0]);
+
+        return result;
+
+}
+
+
+__initcall(it8712_init);
--- /dev/null
+++ b/drivers/serial/it8712.h
@@ -0,0 +1,135 @@
+#define UART_RX		0	/* In:  Receive buffer (DLAB=0) */
+#define UART_TX		0	/* Out: Transmit buffer (DLAB=0) */
+#define UART_DLL	0	/* Out: Divisor Latch Low (DLAB=1) */
+#define UART_TRG	0	/* (LCR=BF) FCTR bit 7 selects Rx or Tx
+				 * In: Fifo count
+				 * Out: Fifo custom trigger levels
+				 * XR16C85x only */
+
+#define UART_DLM	1	/* Out: Divisor Latch High (DLAB=1) */
+#define UART_IER	1	/* Out: Interrupt Enable Register */
+#define UART_FCTR	1	/* (LCR=BF) Feature Control Register
+				 * XR16C85x only */
+
+#define UART_IIR	2	/* In:  Interrupt ID Register */
+#define UART_FCR	2	/* Out: FIFO Control Register */
+#define UART_EFR	2	/* I/O: Extended Features Register */
+				/* (DLAB=1, 16C660 only) */
+
+#define UART_LCR	3	/* Out: Line Control Register */
+#define UART_MCR	4	/* Out: Modem Control Register */
+#define UART_LSR	5	/* In:  Line Status Register */
+#define UART_MSR	6	/* In:  Modem Status Register */
+#define UART_SCR	7	/* I/O: Scratch Register */
+#define UART_EMSR	7	/* (LCR=BF) Extended Mode Select Register
+				 * FCTR bit 6 selects SCR or EMSR
+				 * XR16c85x only */
+
+/*
+ * These are the definitions for the FIFO Control Register
+ * (16650 only)
+ */
+#define UART_FCR_ENABLE_FIFO	0x01 /* Enable the FIFO */
+#define UART_FCR_CLEAR_RCVR	0x02 /* Clear the RCVR FIFO */
+#define UART_FCR_CLEAR_XMIT	0x04 /* Clear the XMIT FIFO */
+#define UART_FCR_DMA_SELECT	0x08 /* For DMA applications */
+#define UART_FCR_TRIGGER_MASK	0xC0 /* Mask for the FIFO trigger range */
+#define UART_FCR_TRIGGER_1	0x00 /* Mask for trigger set at 1 */
+#define UART_FCR_TRIGGER_4	0x40 /* Mask for trigger set at 4 */
+#define UART_FCR_TRIGGER_8	0x80 /* Mask for trigger set at 8 */
+#define UART_FCR_TRIGGER_14	0xC0 /* Mask for trigger set at 14 */
+/* 16650 redefinitions */
+#define UART_FCR6_R_TRIGGER_8	0x00 /* Mask for receive trigger set at 1 */
+#define UART_FCR6_R_TRIGGER_16	0x40 /* Mask for receive trigger set at 4 */
+#define UART_FCR6_R_TRIGGER_24  0x80 /* Mask for receive trigger set at 8 */
+#define UART_FCR6_R_TRIGGER_28	0xC0 /* Mask for receive trigger set at 14 */
+#define UART_FCR6_T_TRIGGER_16	0x00 /* Mask for transmit trigger set at 16 */
+#define UART_FCR6_T_TRIGGER_8	0x10 /* Mask for transmit trigger set at 8 */
+#define UART_FCR6_T_TRIGGER_24  0x20 /* Mask for transmit trigger set at 24 */
+#define UART_FCR6_T_TRIGGER_30	0x30 /* Mask for transmit trigger set at 30 */
+/* TI 16750 definitions */
+#define UART_FCR7_64BYTE	0x20 /* Go into 64 byte mode */
+
+/*
+ * These are the definitions for the Line Control Register
+ *
+ * Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
+ * UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
+ */
+#define UART_LCR_DLAB	0x80	/* Divisor latch access bit */
+#define UART_LCR_SBC	0x40	/* Set break control */
+#define UART_LCR_SPAR	0x20	/* Stick parity (?) */
+#define UART_LCR_EPAR	0x10	/* Even parity select */
+#define UART_LCR_PARITY	0x08	/* Parity Enable */
+#define UART_LCR_STOP	0x04	/* Stop bits: 0=1 stop bit, 1= 2 stop bits */
+#define UART_LCR_WLEN5  0x00	/* Wordlength: 5 bits */
+#define UART_LCR_WLEN6  0x01	/* Wordlength: 6 bits */
+#define UART_LCR_WLEN7  0x02	/* Wordlength: 7 bits */
+#define UART_LCR_WLEN8  0x03	/* Wordlength: 8 bits */
+#define UART_LCR_EVEN   0x18    /* Even parity */
+#define UART_LCR_ODD    0x08    /* Odd parity */
+#define UART_LCR_MSK    0x03
+/*
+ * These are the definitions for the Line Status Register
+ */
+#define UART_LSR_DE     0x80    /* FIFO Data Error */
+#define UART_LSR_TEMT	0x40	/* Transmitter empty */
+#define UART_LSR_THRE	0x20	/* Transmit-hold-register empty */
+#define UART_LSR_BI	0x10	/* Break interrupt indicator */
+#define UART_LSR_FE	0x08	/* Frame error indicator */
+#define UART_LSR_PE	0x04	/* Parity error indicator */
+#define UART_LSR_OE	0x02	/* Overrun error indicator */
+#define UART_LSR_DR	0x01	/* Receiver data ready */
+
+/*
+ * These are the definitions for the Interrupt Identification Register
+ */
+#define UART_IIR_NO_INT	0x01	/* No interrupts pending */
+#define UART_IIR_ID	0x06	/* Mask for the interrupt ID */
+
+#define UART_IIR_MSI	0x00	/* Modem status interrupt */
+#define UART_IIR_THRI	0x02	/* Transmitter holding register empty */
+#define UART_IIR_RDI	0x04	/* Receiver data interrupt */
+#define UART_IIR_RLSI	0x06	/* Receiver line status interrupt */
+#define UART_IIR_RCTO	0x0c	/* Receiver character timeout interrupt */
+/*
+ * These are the definitions for the Interrupt Enable Register
+ */
+#define UART_IER_MSI	0x08	/* Enable Modem status interrupt */
+#define UART_IER_RLSI	0x04	/* Enable receiver line status interrupt */
+#define UART_IER_THRI	0x02	/* Enable Transmitter holding register int. */
+#define UART_IER_RDI	0x01	/* Enable receiver data interrupt */
+/*
+ * Sleep mode for ST16650 and TI16750.
+ * Note that for 16650, EFR-bit 4 must be selected as well.
+ */
+#define UART_IERX_SLEEP  0x10	/* Enable sleep mode */
+
+/*
+ * These are the definitions for the Modem Control Register
+ */
+#define UART_MCR_LOOP	0x10	/* Enable loopback test mode */
+#define UART_MCR_OUT2	0x08	/* Out2 complement */
+#define UART_MCR_OUT1	0x04	/* Out1 complement */
+#define UART_MCR_RTS	0x02	/* RTS complement */
+#define UART_MCR_DTR	0x01	/* DTR complement */
+
+/*
+ * These are the definitions for the Modem Status Register
+ */
+#define UART_MSR_DCD	0x80	/* Data Carrier Detect */
+#define UART_MSR_RI	0x40	/* Ring Indicator */
+#define UART_MSR_DSR	0x20	/* Data Set Ready */
+#define UART_MSR_CTS	0x10	/* Clear to Send */
+#define UART_MSR_DDCD	0x08	/* Delta DCD */
+#define UART_MSR_TERI	0x04	/* Trailing edge ring indicator */
+#define UART_MSR_DDSR	0x02	/* Delta DSR */
+#define UART_MSR_DCTS	0x01	/* Delta CTS */
+#define UART_MSR_ANY_DELTA 0x0F	/* Any of the delta bits! */
+
+#define UART_PARITY_NONE	0x00
+#define UART_PARITY_ODD		0x01
+#define UART_PARITY_EVEN	0x02
+
+
+
--- /dev/null
+++ b/drivers/serial/serial_it8712.c
@@ -0,0 +1,876 @@
+/*
+ *  linux/drivers/char/serial_uart00.c
+ *
+ *  Driver for UART00 serial ports
+ *
+ *  Based on drivers/char/serial_amba.c, by ARM Limited &
+ *                                          Deep Blue Solutions Ltd.
+ *  Copyright 2001 Altera Corporation
+ *
+ * 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
+ *
+ *  $Id: serial_it8712.c,v 1.1.1.1 2006/04/03 08:41:00 amos_lee Exp $
+ *
+ */
+#include <linux/module.h>
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/circ_buf.h>
+#include <linux/serial.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
+#include <asm/sizes.h>
+
+#if defined(CONFIG_SERIAL_IT8712_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <linux/serial_core.h>
+#include <asm/arch/sl2312.h>
+#include <asm/arch/int_ctrl.h>
+#include <asm/arch/it8712.h>
+#include "serial_it8712.h"
+
+//#define DEBUG           1
+#define UART_NR		1
+
+#define SERIAL_IT8712_NAME	"ttySI"
+#define SERIAL_IT8712_MAJOR	204
+#define SERIAL_IT8712_MINOR	41      /* Temporary - will change in future */
+#define SERIAL_IT8712_NR	UART_NR
+#define UART_PORT_SIZE 0x50
+
+#define CALLOUT_IT8712_NAME	"cuaslI"
+#define CALLOUT_IT8712_MAJOR	205
+#define CALLOUT_IT8712_MINOR	41      /* Temporary - will change in future */
+#define CALLOUT_IT8712_NR	UART_NR
+#define LPC_HOST_CONTINUE_MODE	0x00000040
+
+#define IT8712_NO_PORTS         UART_NR
+
+static struct tty_driver normal, callout;
+static struct tty_struct *it8712_table[UART_NR];
+static struct termios *it8712_termios[UART_NR], *it8712_termios_locked[UART_NR];
+static struct console it8712_console;
+
+#define IT8712_ISR_PASS_LIMIT	256
+
+/*
+ * Access macros for the SL2312 UARTs
+ */
+#define UART_GET_INT_STATUS(p)	(inb(((p)->membase+UART_IIR)) & 0x0F)  // interrupt identification
+#define UART_PUT_IER(p, c)      outb(c,((p)->membase+UART_IER))         // interrupt enable
+#define UART_GET_IER(p)         inb(((p)->membase+UART_IER))
+#define UART_PUT_CHAR(p, c)     outb(c,((p)->membase+UART_TX))         // transmitter holding
+#define UART_GET_CHAR(p)        inb(((p)->membase+UART_RX))            // receive buffer
+#define UART_GET_LSR(p)         inb(((p)->membase+UART_LSR))            // line status
+#define UART_GET_MSR(p)         inb(((p)->membase+UART_MSR))            // modem status
+#define UART_GET_MCR(p)         inb(((p)->membase+UART_MCR))            // modem control
+#define UART_PUT_MCR(p, c)      outb(c,((p)->membase+UART_MCR))
+#define UART_GET_LCR(p)         inb(((p)->membase+UART_LCR))       // mode control
+#define UART_PUT_LCR(p, c)      outb(c,((p)->membase+UART_LCR))
+#define UART_PUT_FCR(p, c)      outb(c,((p)->membase+UART_FCR))       // fifo control
+#define UART_GET_DIV_HI(p)	inb(((p)->membase+UART_DLM))
+#define UART_PUT_DIV_HI(p, c)	outb(c,((p)->membase+UART_DLM))
+#define UART_GET_DIV_LO(p)	inb(((p)->membase+UART_DLL))
+#define UART_PUT_DIV_LO(p, c)	outb(c,((p)->membase+UART_DLL))
+#define UART_PUT_MDR(p, c)      outb(c,UART_MDR((p)->membase))
+#define UART_RX_DATA(s)		((s) & UART_LSR_DR)
+#define UART_TX_READY(s)	((s) & UART_LSR_THRE)
+
+static void it8712_stop_tx(struct uart_port *port, u_int from_tty)
+{
+        unsigned int reg;
+
+//        printk("it8712 stop tx : \n");
+        reg = UART_GET_IER(port);
+        reg &= ~(UART_IER_THRI);
+	UART_PUT_IER(port, reg);
+}
+
+static void it8712_stop_rx(struct uart_port *port)
+{
+        unsigned int reg;
+
+//        printk("it8712 stop rx : \n");
+        reg = UART_GET_IER(port);
+        reg &= ~(UART_IER_RDI);
+	UART_PUT_IER(port, reg);
+
+}
+
+static void it8712_enable_ms(struct uart_port *port)
+{
+        unsigned int reg;
+
+//        printk("it8712 enable ms : \n");
+
+        reg = UART_GET_IER(port);
+        reg |= (UART_IER_MSI);
+	UART_PUT_IER(port, reg);
+
+}
+
+static void
+it8712_rx_chars(struct uart_info *info, struct pt_regs *regs)
+{
+	struct tty_struct *tty = info->tty;
+	unsigned int status, mask, ch, flg, ignored = 0;
+	struct uart_port *port = info->port;
+
+ //       printk("it8712_rx_chars : \n");
+	status = UART_GET_LSR(port);
+	while (UART_RX_DATA(status)) {
+
+		/*
+		 * We need to read rds before reading the
+		 * character from the fifo
+		 */
+		ch = UART_GET_CHAR(port);
+		port->icount.rx++;
+
+		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+			goto ignore_char;
+
+		flg = TTY_NORMAL;
+
+		/*
+		 * Note that the error handling code is
+		 * out of the main execution path
+		 */
+
+		if (status & (UART_LSR_OE|UART_LSR_PE|UART_LSR_FE|UART_LSR_BI|UART_LSR_DE))
+			goto handle_error;
+		if (uart_handle_sysrq_char(info, ch, regs))
+			goto ignore_char;
+
+	error_return:
+		*tty->flip.flag_buf_ptr++ = flg;
+		*tty->flip.char_buf_ptr++ = ch;
+		tty->flip.count++;
+	ignore_char:
+		status = UART_GET_LSR(port);
+	} // end of while
+out:
+	tty_flip_buffer_push(tty);
+	return;
+
+handle_error:
+	if (status & UART_LSR_BI) {
+		status &= ~(UART_LSR_FE);
+		port->icount.brk++;
+
+#ifdef SUPPORT_SYSRQ
+		if (uart_handle_break(info, &it8712_console))
+			goto ignore_char;
+#endif
+	} else if (status & UART_LSR_PE)
+		port->icount.parity++;
+	else if (status & UART_LSR_FE)
+		port->icount.frame++;
+
+	if (status & UART_LSR_OE)
+		port->icount.overrun++;
+
+	if (status & port->ignore_status_mask) {
+		if (++ignored > 100)
+			goto out;
+		goto ignore_char;
+	}
+
+	mask = status & port->read_status_mask;
+
+	if (mask & UART_LSR_BI)
+		flg = TTY_BREAK;
+	else if (mask & UART_LSR_PE)
+		flg = TTY_PARITY;
+	else if (mask & UART_LSR_FE)
+		flg = TTY_FRAME;
+
+	if (status & UART_LSR_OE) {
+		/*
+		 * CHECK: does overrun affect the current character?
+		 * ASSUMPTION: it does not.
+		 */
+		*tty->flip.flag_buf_ptr++ = flg;
+		*tty->flip.char_buf_ptr++ = ch;
+		tty->flip.count++;
+		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+			goto ignore_char;
+		ch = 0;
+		flg = TTY_OVERRUN;
+	}
+#ifdef SUPPORT_SYSRQ
+	info->sysrq = 0;
+#endif
+	goto error_return;
+}
+
+static void it8712_tx_chars(struct uart_info *info)
+{
+	int count;
+	struct uart_port *port=info->port;
+
+	if (port->x_char) {
+		while(!(UART_GET_LSR(port)&UART_LSR_THRE));
+		UART_PUT_CHAR(port, port->x_char);
+		port->icount.tx++;
+		port->x_char = 0;
+
+		return;
+	}
+	if (info->xmit.head == info->xmit.tail
+	    || info->tty->stopped
+	    || info->tty->hw_stopped) {
+		it8712_stop_tx(info->port, 0);
+		return;
+	}
+
+	count = port->fifosize >> 1;
+	do {
+		while(!(UART_GET_LSR(port)&UART_LSR_THRE));
+		UART_PUT_CHAR(port, info->xmit.buf[info->xmit.tail]);
+		info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1);
+		port->icount.tx++;
+		if (info->xmit.head == info->xmit.tail)
+			break;
+	} while (--count > 0);
+
+	if (CIRC_CNT(info->xmit.head,
+		     info->xmit.tail,
+		     UART_XMIT_SIZE) < WAKEUP_CHARS)
+		uart_event(info, EVT_WRITE_WAKEUP);
+
+	if (info->xmit.head == info->xmit.tail)
+		it8712_stop_tx(info->port, 0);
+}
+
+static void it8712_start_tx(struct uart_port *port, u_int nonempty, u_int from_tty)
+{
+        unsigned int reg;
+	struct uart_info *info=(struct uart_info*)(port->iobase);
+
+//        printk("it8712 start tx : \n");
+        reg = UART_GET_IER(port);
+        reg |= (UART_IER_THRI);
+	UART_PUT_IER(port, reg);
+	it8712_tx_chars(info);
+}
+
+static void it8712_modem_status(struct uart_info *info)
+{
+	unsigned int status;
+	struct uart_icount *icount = &info->port->icount;
+
+//        printk("it8712 modem status : \n");
+
+	status = UART_GET_MSR(info->port);
+
+	if (!(status & (UART_MSR_DCTS | UART_MSR_DDSR |
+		       UART_MSR_TERI | UART_MSR_DDCD)))
+		return;
+
+	if (status & UART_MSR_DCD) {
+		icount->dcd++;
+#ifdef CONFIG_HARD_PPS
+		if ((info->flags & ASYNC_HARDPPS_CD) &&
+		    (status & UART_MSR_DCD_MSK))
+			hardpps();
+#endif
+		if (info->flags & ASYNC_CHECK_CD) {
+			if (status & UART_MSR_DCD)
+				wake_up_interruptible(&info->open_wait);
+			else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
+				   (info->flags & ASYNC_CALLOUT_NOHUP))) {
+				if (info->tty)
+					tty_hangup(info->tty);
+			}
+		}
+	}
+
+	if (status & UART_MSR_DDSR)
+		icount->dsr++;
+
+	if (status & UART_MSR_DCTS) {
+		icount->cts++;
+
+		if (info->flags & ASYNC_CTS_FLOW) {
+			status &= UART_MSR_CTS;
+
+			if (info->tty->hw_stopped) {
+				if (status) {
+					info->tty->hw_stopped = 0;
+					info->ops->start_tx(info->port, 1, 0);
+					uart_event(info, EVT_WRITE_WAKEUP);
+				}
+			} else {
+				if (!status) {
+					info->tty->hw_stopped = 1;
+					info->ops->stop_tx(info->port, 0);
+				}
+			}
+		}
+	}
+	wake_up_interruptible(&info->delta_msr_wait);
+
+}
+
+static void it8712_int(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct uart_info *info = dev_id;
+	unsigned int status, pass_counter = 0;
+
+	status = UART_GET_INT_STATUS(info->port);
+	do {
+//		     printk("it8712_int: status %x \n", status);
+		switch(status)
+		{
+		   case UART_IIR_RDI:
+		   case UART_IIR_RLSI:
+		   case UART_IIR_RCTO:
+			it8712_rx_chars(info, regs);
+		   break;
+		   case UART_IIR_THRI:
+			it8712_tx_chars(info);
+		   break;
+		   case UART_IIR_MSI:
+			it8712_modem_status(info);
+		   break;
+		   default:
+		   break;
+		}
+		if (pass_counter++ > IT8712_ISR_PASS_LIMIT)
+			break;
+
+		status = UART_GET_INT_STATUS(info->port);
+	} while (status);
+}
+
+static u_int it8712_tx_empty(struct uart_port *port)
+{
+//        printk("it8712 tx empty : \n");
+
+	return ((UART_GET_LSR(port) & UART_LSR_THRE)? TIOCSER_TEMT : 0);
+}
+
+static u_int it8712_get_mctrl(struct uart_port *port)
+{
+	unsigned int result = 0;
+	unsigned int status;
+
+//        printk("it8712 get mctrl : \n");
+
+	status = UART_GET_MSR(port);
+	if (status & UART_MSR_DCD)
+		result |= TIOCM_CAR;
+	if (status & UART_MSR_DSR)
+		result |= TIOCM_DSR;
+	if (status & UART_MSR_CTS)
+		result |= TIOCM_CTS;
+	if (status & UART_MSR_RI)
+		result |= TIOCM_RI;
+
+	return result;
+}
+
+static void it8712_set_mctrl_null(struct uart_port *port, u_int mctrl)
+{
+}
+
+static void it8712_break_ctl(struct uart_port *port, int break_state)
+{
+	unsigned int lcr;
+
+//        printk("it8712 break ctl : \n");
+
+	lcr = UART_GET_LCR(port);
+	if (break_state == -1)
+		lcr |= UART_LCR_SBC;
+	else
+		lcr &= ~UART_LCR_SBC;
+	UART_PUT_LCR(port, lcr);
+}
+
+static inline u_int uart_calculate_quot(struct uart_info *info, u_int baud)
+{
+	u_int quot;
+
+	/* Special case: B0 rate */
+	if (!baud)
+		baud = 9600;
+
+	quot = (info->port->uartclk/(16 * baud)) ;
+
+	return quot;
+}
+static void it8712_change_speed(struct uart_port *port, u_int cflag, u_int iflag, u_int quot)
+{
+	u_int uart_mc=0, old_ier;
+	unsigned long flags;
+
+#ifdef DEBUG
+	printk("it8712_set_cflag(0x%x) called\n", cflag);
+#endif
+
+
+	/* byte size and parity */
+	switch (cflag & CSIZE) {
+	case CS5: uart_mc = UART_LCR_WLEN5; break;
+	case CS6: uart_mc = UART_LCR_WLEN6; break;
+	case CS7: uart_mc = UART_LCR_WLEN7; break;
+	default:  uart_mc = UART_LCR_WLEN8; break; // CS8
+	}
+	if (cflag & CSTOPB)
+		uart_mc|= UART_LCR_STOP;
+	if (cflag & PARENB) {
+		uart_mc |= UART_LCR_EVEN;
+		if (!(cflag & PARODD))
+			uart_mc |= UART_LCR_ODD;
+	}
+
+	port->read_status_mask = UART_LSR_OE;
+	if (iflag & INPCK)
+		port->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (iflag & (BRKINT | PARMRK))
+		port->read_status_mask |= UART_LSR_BI;
+
+	/*
+	 * Characters to ignore
+	 */
+	port->ignore_status_mask = 0;
+	if (iflag & IGNPAR)
+		port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (iflag & IGNBRK) {
+		port->ignore_status_mask |= UART_LSR_BI;
+		/*
+		 * If we're ignoring parity and break indicators,
+		 * ignore overruns to (for real raw support).
+		 */
+		if (iflag & IGNPAR)
+			port->ignore_status_mask |= UART_LSR_OE;
+	}
+
+	/* first, disable everything */
+	save_flags(flags); cli();
+	old_ier = UART_GET_IER(port);
+
+	if ((port->flags & ASYNC_HARDPPS_CD) ||
+	    (cflag & CRTSCTS) || !(cflag & CLOCAL))
+		old_ier |= UART_IER_MSI;
+
+	/* Set baud rate */
+	quot = quot / 13;
+	UART_PUT_LCR(port, UART_LCR_DLAB);
+	UART_PUT_DIV_LO(port, (quot & 0xff));
+	UART_PUT_DIV_HI(port, ((quot & 0xf00) >> 8));
+
+	UART_PUT_LCR(port, uart_mc);
+//	UART_PUT_LCR(port, 0x07); // ???? it is wired
+        UART_PUT_MCR(port, 0x08);
+        UART_PUT_FCR(port, 0x01);
+	UART_PUT_IER(port, 0x05);
+
+	restore_flags(flags);
+}
+
+static int it8712_startup(struct uart_port *port, struct uart_info *info)
+{
+	int retval;
+	unsigned int regs;
+
+//        printk("it8712 startup : \n");
+
+	/*
+	 * Use iobase to store a pointer to info. We need this to start a
+	 * transmission as the tranmittr interrupt is only generated on
+	 * the transition to the idle state
+	 */
+
+	port->iobase=(u_int)info;
+
+	/*
+	 * Allocate the IRQ
+	 */
+	retval = request_irq(port->irq, it8712_int, SA_INTERRUPT, "it8712", info);
+	if (retval)
+		return retval;
+
+        /* setup interrupt controller  */
+        regs = *((volatile unsigned int *)IRQ_TMODE(IO_ADDRESS(SL2312_INTERRUPT_BASE)));
+        regs |= (IRQ_SERIRQ0_MASK);
+        *((volatile unsigned int *)IRQ_TMODE(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = regs;
+        regs = *((volatile unsigned int *)IRQ_LEVEL(IO_ADDRESS(SL2312_INTERRUPT_BASE)));
+        regs &= ~(IRQ_SERIRQ0_MASK);
+        *((volatile unsigned int *)IRQ_LEVEL(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = regs;
+        *((volatile unsigned int *)IRQ_MASK(IO_ADDRESS(SL2312_INTERRUPT_BASE))) |= (unsigned int)(IRQ_SERIRQ0_MASK);
+
+	/*
+	 * Finally, enable interrupts. Use the TII interrupt to minimise
+	 * the number of interrupts generated. If higher performance is
+	 * needed, consider using the TI interrupt with a suitable FIFO
+	 * threshold
+	 */
+	UART_PUT_IER(port, (UART_IER_RDI|UART_IER_THRI));
+
+	return 0;
+}
+
+static void it8712_shutdown(struct uart_port *port, struct uart_info *info)
+{
+//        printk("it8712 shutdown : \n");
+
+	/*
+	 * disable all interrupts, disable the port
+	 */
+	UART_PUT_IER(port, 0x0);
+
+	/* disable break condition and fifos */
+//	UART_PUT_MCR(port, (UART_GET_MCR(port)&UART_MCR_MASK));
+
+	/*
+	 * Free the interrupt
+	 */
+	free_irq(port->irq, info);
+}
+
+static const char *it8712_type(struct uart_port *port)
+{
+	return port->type == PORT_IT8712 ? "IT8712" : NULL;
+}
+
+/*
+ * Release the memory region(s) being used by 'port'
+ */
+static void it8712_release_port(struct uart_port *port)
+{
+//        printk("it8712 release port : \n");
+
+	release_mem_region(port->mapbase, UART_PORT_SIZE);
+}
+
+/*
+ * Request the memory region(s) being used by 'port'
+ */
+static int it8712_request_port(struct uart_port *port)
+{
+	return request_mem_region(port->mapbase, UART_PORT_SIZE,
+				    "serial_it8712") != NULL ? 0 : -EBUSY;
+}
+
+/*
+ * Configure/autoconfigure the port.
+ */
+static void it8712_config_port(struct uart_port *port, int flags)
+{
+
+	if (flags & UART_CONFIG_TYPE) {
+		if (it8712_request_port(port) == 0)
+			port->type = PORT_IT8712;
+	}
+}
+
+/*
+ * verify the new serial_struct (for TIOCSSERIAL).
+ */
+static int it8712_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+	int ret = 0;
+
+	if (ser->type != PORT_UNKNOWN && ser->type != PORT_UART00)
+		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 it8712_pops = {
+	tx_empty:	it8712_tx_empty,
+	set_mctrl:	it8712_set_mctrl_null,
+	get_mctrl:	it8712_get_mctrl,
+	stop_tx:	it8712_stop_tx,
+	start_tx:	it8712_start_tx,
+	stop_rx:	it8712_stop_rx,
+	enable_ms:	it8712_enable_ms,
+	break_ctl:	it8712_break_ctl,
+	startup:	it8712_startup,
+	shutdown:	it8712_shutdown,
+	change_speed:	it8712_change_speed,
+	type:		it8712_type,
+	release_port:	it8712_release_port,
+	request_port:	it8712_request_port,
+	config_port:	it8712_config_port,
+	verify_port:	it8712_verify_port,
+};
+
+#ifdef CONFIG_ARCH_SL2312
+
+static struct uart_port it8712_ports[UART_NR] = {
+	{
+		membase:	(void *)0,
+		mapbase:	0,
+		iotype:		SERIAL_IO_MEM,
+		irq:		0,
+		uartclk:	UART_CLK/2,
+		fifosize:	16,
+		ops:		&it8712_pops,
+		flags:		ASYNC_BOOT_AUTOCONF,
+	}
+};
+
+#endif
+
+#ifdef CONFIG_SERIAL_IT8712_CONSOLE
+#ifdef used_and_not_const_char_pointer
+static int it8712_console_read(struct uart_port *port, char *s, u_int count)
+{
+	unsigned int status;
+	int c;
+#ifdef DEBUG
+	printk("it8712_console_read() called\n");
+#endif
+
+	c = 0;
+	while (c < count) {
+		status = UART_GET_LSR(port);
+ 		if (UART_RX_DATA(status)) {
+			*s++ = UART_GET_CHAR(port);
+			c++;
+		} else {
+			// nothing more to get, return
+			return c;
+		}
+	}
+	// return the count
+	return c;
+}
+#endif
+static void it8712_console_write(struct console *co, const char *s, unsigned count)
+{
+#ifdef CONFIG_ARCH_SL2312
+	struct uart_port *port = it8712_ports + co->index;
+	unsigned int status, old_ies;
+	int i;
+
+	/*
+	 *	First save the CR then disable the interrupts
+	 */
+	old_ies = UART_GET_IER(port);
+	UART_PUT_IER(port,0x0);
+
+	/*
+	 *	Now, do each character
+	 */
+	for (i = 0; i < count; i++) {
+		do {
+			status = UART_GET_LSR(port);
+		} while (!UART_TX_READY(status));
+		UART_PUT_CHAR(port, s[i]);
+		if (s[i] == '\n') {
+			do {
+				status = UART_GET_LSR(port);
+			} while (!UART_TX_READY(status));
+			UART_PUT_CHAR(port, '\r');
+		}
+	}
+
+	/*
+	 *	Finally, wait for transmitter to become empty
+	 *	and restore the IES
+	 */
+	do {
+		status = UART_GET_LSR(port);
+	} while (!(status&UART_LSR_THRE));
+	UART_PUT_IER(port, old_ies);
+#endif
+}
+
+static kdev_t it8712_console_device(struct console *co)
+{
+	return MKDEV(SERIAL_IT8712_MAJOR, SERIAL_IT8712_MINOR + co->index);
+}
+
+static int it8712_console_wait_key(struct console *co)
+{
+#ifdef CONFIG_ARCH_SL2312
+	struct uart_port *port = (it8712_ports + co->index);
+	unsigned int status;
+
+	do {
+		status = UART_GET_LSR(port);
+	} while (!UART_RX_DATA(status));
+	return UART_GET_CHAR(port);
+#else
+	return 0;
+#endif
+}
+
+static void /*__init*/ it8712_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
+{
+	printk("it8712 console get options : \n");
+
+	u_int uart_mc, quot;
+	uart_mc= UART_GET_MCR(port);
+
+	*parity = 'n';
+	if (uart_mc & UART_LCR_PARITY) {
+		if (uart_mc & UART_LCR_EVEN)
+			*parity = 'e';
+		else
+			*parity = 'o';
+	}
+
+	switch (uart_mc & UART_LCR_MSK){
+
+	case UART_LCR_WLEN5:
+		*bits = 5;
+		break;
+	case UART_LCR_WLEN6:
+		*bits = 6;
+		break;
+	case UART_LCR_WLEN7:
+		*bits = 7;
+		break;
+	case UART_LCR_WLEN8:
+		*bits = 8;
+		break;
+	}
+	UART_PUT_MCR(port,UART_LCR_DLAB);
+	quot = UART_GET_DIV_LO(port) | (UART_GET_DIV_HI(port) << 8);
+	UART_PUT_MCR(port,uart_mc);
+	*baud = (port->uartclk / (16 *quot));
+}
+
+static int __init it8712_console_setup(struct console *co, char *options)
+{
+	struct uart_port *port;
+	int baud = 38400;
+	int bits = 8;
+	int parity = 'n';
+	int flow= 'n';
+	int base, irq;
+	int i ;
+
+//	printk("it8712 console setup : \n");
+
+	LPCSetConfig(0, 0x02, 0x01);
+        LPCSetConfig(LDN_SERIAL1, 0x30, 0x1);
+        LPCSetConfig(LDN_SERIAL1, 0x23, 0x0);
+	base = IT8712_IO_BASE;
+	base += ((LPCGetConfig(LDN_SERIAL1, 0x60) << 8) + LPCGetConfig(LDN_SERIAL1, 0x61));
+	it8712_ports[0].mapbase = base;
+	it8712_ports[0].membase = IO_ADDRESS(base);
+	it8712_ports[0].irq = IRQ_SERIRQ0_OFFSET;
+       	irq = LPCGetConfig(LDN_SERIAL1, 0x70);
+	it8712_ports[0].irq += irq;
+
+	printk("it8712 irq is %x %x \n", it8712_ports[0].irq, irq);
+
+	// setup LPC Host 'quiet mode'
+	*((volatile unsigned int *)IO_ADDRESS((SL2312_LPC_HOST_BASE+0x04))) |= LPC_HOST_CONTINUE_MODE ;
+	for(i=0;i<1000;i++) ;						// delay
+	*((volatile unsigned int *)IO_ADDRESS((SL2312_LPC_HOST_BASE+0x04))) &= ~(LPC_HOST_CONTINUE_MODE) ;
+
+#ifdef CONFIG_ARCH_SL2312
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	port = uart_get_console(it8712_ports,IT8712_NO_PORTS,co);
+#else
+	return -ENODEV;
+#endif
+
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+	else
+		it8712_console_get_options(port, &baud, &parity, &bits);
+
+	return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+static struct console it8712_console = {
+	name:           SERIAL_IT8712_NAME,
+	write:		it8712_console_write,
+#ifdef used_and_not_const_char_pointer
+	read:		it8712_console_read,
+#endif
+	device:		it8712_console_device,
+//	wait_key:	it8712_console_wait_key,
+	setup:		it8712_console_setup,
+	flags:		(CON_PRINTBUFFER|CON_ENABLED),
+	index:		-1,
+};
+
+void __init it8712_console_init(void)
+{
+	register_console(&it8712_console);
+}
+
+#define IT8712_CONSOLE	&it8712_console
+#else
+#define IT8712_CONSOLE	NULL
+#endif
+
+static struct uart_driver it8712_reg = {
+	owner:                  NULL,
+	normal_major:		SERIAL_IT8712_MAJOR,
+	normal_name:		SERIAL_IT8712_NAME,
+	normal_driver:		&normal,
+	callout_major:		CALLOUT_IT8712_MAJOR,
+	callout_name:		CALLOUT_IT8712_NAME,
+	callout_driver:		&callout,
+	table:			it8712_table,
+	termios:		it8712_termios,
+	termios_locked:		it8712_termios_locked,
+	minor:			SERIAL_IT8712_MINOR,
+	nr:			UART_NR,
+#ifdef CONFIG_ARCH_SL2312
+	port:			it8712_ports,
+#endif
+	state:			NULL,
+	cons:			IT8712_CONSOLE,
+};
+
+static int __init it8712_init(void)
+{
+//	printk("serial_it8712: it871212_init \n");
+
+	return uart_register_driver(&it8712_reg);
+}
+
+
+__initcall(it8712_init);
--- /dev/null
+++ b/drivers/serial/serial_sl2312.c
@@ -0,0 +1,827 @@
+/*
+ *  linux/drivers/char/serial_uart00.c
+ *
+ *  Driver for UART00 serial ports
+ *
+ *  Based on drivers/char/serial_amba.c, by ARM Limited &
+ *                                          Deep Blue Solutions Ltd.
+ *  Copyright 2001 Altera Corporation
+ *
+ * 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
+ *
+ *  $Id: serial_sl2312.c,v 1.1.1.1 2006/04/03 08:41:00 amos_lee Exp $
+ *
+ */
+#include <linux/module.h>
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/circ_buf.h>
+#include <linux/serial.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <linux/serial_core.h>
+
+#include <asm/system.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
+#include <asm/sizes.h>
+#include <linux/spinlock.h>
+#include <linux/irq.h>
+
+
+#if defined(CONFIG_SERIAL_SL2312_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <asm/arch/sl2312.h>
+#define UART_TYPE (volatile unsigned int*)
+#include <asm/arch/uart.h>
+#include <asm/arch/int_ctrl.h>
+
+// #define DEBUG           1
+#define UART_NR		1
+
+
+#define SERIAL_SL2312_NAME	"ttyS"
+#define SERIAL_SL2312_MAJOR	204
+#define SERIAL_SL2312_MINOR	40      /* Temporary - will change in future */
+#define SERIAL_SL2312_NR	UART_NR
+#define UART_PORT_SIZE 0x50
+
+#define SL2312_NO_PORTS         UART_NR
+#define SL2312_ISR_PASS_LIMIT	256
+
+/*
+ * Access macros for the SL2312 UARTs
+ */
+#define UART_GET_INT_STATUS(p)	(inl(UART_IIR((p)->membase)) & 0x0F)      // interrupt identification
+#define UART_PUT_IER(p, c)      outl(c,UART_IER((p)->membase))    // interrupt enable
+#define UART_GET_IER(p)         inl(UART_IER((p)->membase))
+#define UART_PUT_CHAR(p, c)     outl(c,UART_THR((p)->membase))    // transmitter holding
+#define UART_GET_CHAR(p)        inl(UART_RBR((p)->membase))       // receive buffer
+#define UART_GET_LSR(p)         inl(UART_LSR((p)->membase))       // line status
+#define UART_GET_MSR(p)         inl(UART_MSR((p)->membase))       // modem status
+#define UART_GET_MCR(p)         inl(UART_MCR((p)->membase))       // modem control
+#define UART_PUT_MCR(p, c)      outl(c,UART_MCR((p)->membase))
+#define UART_GET_LCR(p)         inl(UART_LCR((p)->membase))       // mode control
+#define UART_PUT_LCR(p, c)      outl(c,UART_LCR((p)->membase))
+#define UART_GET_DIV_HI(p)	inl(UART_DIV_HI((p)->membase))
+#define UART_PUT_DIV_HI(p, c)	outl(c,UART_DIV_HI((p)->membase))
+#define UART_GET_DIV_LO(p)	inl(UART_DIV_LO((p)->membase))
+#define UART_PUT_DIV_LO(p, c)	outl(c,UART_DIV_LO((p)->membase))
+#define UART_PUT_MDR(p, c)      outl(c,UART_MDR((p)->membase))
+#define UART_RX_DATA(s)		((s) & UART_LSR_DR)
+#define UART_TX_READY(s)	((s) & UART_LSR_THRE)
+
+
+static void sl2312_stop_tx(struct uart_port *port)
+{
+        unsigned int reg;
+
+//        printk("sl2312 stop tx : \n");
+        reg = UART_GET_IER(port);
+        reg &= ~(UART_IER_TE);
+	UART_PUT_IER(port, reg);
+}
+
+static void sl2312_stop_rx(struct uart_port *port)
+{
+        unsigned int reg;
+
+//        printk("sl2312 stop rx : \n");
+        reg = UART_GET_IER(port);
+        reg &= ~(UART_IER_DR);
+	UART_PUT_IER(port, reg);
+
+}
+
+static void sl2312_enable_ms(struct uart_port *port)
+{
+        unsigned int reg;
+
+//        printk("sl2312 enable ms : \n");
+
+        reg = UART_GET_IER(port);
+        reg |= (UART_IER_MS);
+	UART_PUT_IER(port, reg);
+
+}
+
+static void
+sl2312_rx_chars(struct uart_port *port)
+{
+	struct tty_struct *tty = port->info->tty;
+	unsigned int status, mask, ch, flg, ignored = 0;
+
+
+ //       printk("sl2312_rx_chars : \n");
+	status = UART_GET_LSR(port);
+	while (UART_RX_DATA(status)) {
+
+		/*
+		 * We need to read rds before reading the
+		 * character from the fifo
+		 */
+		ch = UART_GET_CHAR(port);
+		port->icount.rx++;
+
+		//if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+		if (tty && !tty_buffer_request_room(tty, 1))
+			goto ignore_char;
+
+		flg = TTY_NORMAL;
+
+		/*
+		 * Note that the error handling code is
+		 * out of the main execution path
+		 */
+
+		if (status & (UART_LSR_OE|UART_LSR_PE|UART_LSR_FE|UART_LSR_BI|UART_LSR_DE))
+			goto handle_error;
+		if (uart_handle_sysrq_char(port, ch))
+			goto ignore_char;
+
+	error_return:
+		//*tty->flip.flag_buf_ptr++ = flg;
+		//*tty->flip.char_buf_ptr++ = ch;
+		//tty->flip.count++;
+		tty_insert_flip_char(tty, ch, flg);
+	ignore_char:
+		status = UART_GET_LSR(port);
+	} // end of while
+out:
+	tty_flip_buffer_push(tty);
+	return;
+
+handle_error:
+	if (status & UART_LSR_BI) {
+		status &= ~(UART_LSR_FE);
+		port->icount.brk++;
+
+#ifdef SUPPORT_SYSRQ
+		if (uart_handle_break(port))
+			goto ignore_char;
+#endif
+	} else if (status & UART_LSR_PE)
+		port->icount.parity++;
+	else if (status & UART_LSR_FE)
+		port->icount.frame++;
+
+	if (status & UART_LSR_OE)
+		port->icount.overrun++;
+
+	if (status & port->ignore_status_mask) {
+		if (++ignored > 100)
+			goto out;
+		goto ignore_char;
+	}
+
+	mask = status & port->read_status_mask;
+
+	if (mask & UART_LSR_BI)
+		flg = TTY_BREAK;
+	else if (mask & UART_LSR_PE)
+		flg = TTY_PARITY;
+	else if (mask & UART_LSR_FE)
+		flg = TTY_FRAME;
+
+	if (status & UART_LSR_OE) {
+		/*
+		 * CHECK: does overrun affect the current character?
+		 * ASSUMPTION: it does not.
+		 */
+		//*tty->flip.flag_buf_ptr++ = flg;
+		//*tty->flip.char_buf_ptr++ = ch;
+		//tty->flip.count++;
+
+		tty_insert_flip_char(tty, 0, TTY_BREAK);
+
+		// if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+		if (tty_buffer_request_room(tty, 1))
+			goto ignore_char;
+		ch = 0;
+		flg = TTY_OVERRUN;
+	}
+#ifdef SUPPORT_SYSRQ
+	port->sysrq = 0;
+#endif
+	goto error_return;
+}
+
+static void sl2312_tx_chars(struct uart_port *port)
+{
+	struct circ_buf *xmit = &port->info->xmit;
+	int count;
+
+
+	if (port->x_char) {
+		while(!(UART_GET_LSR(port)&UART_LSR_THRE));
+		UART_PUT_CHAR(port, port->x_char);
+		port->icount.tx++;
+		port->x_char = 0;
+
+		return;
+	}
+	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+		sl2312_stop_tx(port);
+
+		return;
+	}
+
+	count = port->fifosize >> 1;
+	do {
+		while(!(UART_GET_LSR(port)&UART_LSR_THRE));
+		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;
+	} while (--count > 0);
+
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(port);
+
+	if (uart_circ_empty(xmit))
+		sl2312_stop_tx(port);
+
+}
+
+static void sl2312_start_tx(struct uart_port *port)
+{
+        unsigned int reg;
+
+//        printk("sl2312 start tx : \n");
+        reg = UART_GET_IER(port);
+        reg |= (UART_IER_TE);
+	UART_PUT_IER(port, reg);
+
+	sl2312_tx_chars(port);
+}
+
+static void sl2312_modem_status(struct uart_port *port)
+{
+	unsigned int status;
+
+//        printk("it8712 modem status : \n");
+
+	status = UART_GET_MSR(port);
+
+	if (!(status & (UART_MSR_DCTS | UART_MSR_DDSR |
+		       UART_MSR_TERI | UART_MSR_DDCD)))
+		return;
+
+        if (status & UART_MSR_DDCD)
+                uart_handle_dcd_change(port, status & UART_MSR_DCD);
+
+        if (status & UART_MSR_DDSR)
+                port->icount.dsr++;
+
+        if (status & UART_MSR_DCTS)
+                uart_handle_cts_change(port, status & UART_MSR_CTS);
+
+	wake_up_interruptible(&port->info->delta_msr_wait);
+
+}
+
+static irqreturn_t sl2312_int(int irq, void *dev_id)
+{
+	struct uart_port *port = dev_id;
+	unsigned int status, pass_counter = 0;
+
+	status = UART_GET_INT_STATUS(port);
+	do {
+		switch(status)
+		{
+		   case UART_IIR_DR:
+		   case UART_IIR_RLS:
+			sl2312_rx_chars(port);
+		   break;
+		   case UART_IIR_TE:
+			sl2312_tx_chars(port);
+		   break;
+		   case UART_IIR_MODEM:
+			sl2312_modem_status(port);
+		   break;
+		   default:
+		   break;
+		}
+		if (pass_counter++ > SL2312_ISR_PASS_LIMIT)
+			break;
+
+		status = UART_GET_INT_STATUS(port);
+	} while (status);
+
+	return IRQ_HANDLED;
+}
+
+static u_int sl2312_tx_empty(struct uart_port *port)
+{
+//        printk("sl2312 tx empty : \n");
+
+	return ((UART_GET_LSR(port) & UART_LSR_TE)? TIOCSER_TEMT : 0);
+}
+
+static u_int sl2312_get_mctrl(struct uart_port *port)
+{
+	unsigned int result = 0;
+	unsigned int status;
+
+//        printk("sl2312 get mctrl : \n");
+
+	status = UART_GET_MSR(port);
+	if (status & UART_MSR_DCD)
+		result |= TIOCM_CAR;
+	if (status & UART_MSR_DSR)
+		result |= TIOCM_DSR;
+	if (status & UART_MSR_CTS)
+		result |= TIOCM_CTS;
+	if (status & UART_MSR_RI)
+		result |= TIOCM_RI;
+
+	return result;
+}
+
+static void sl2312_set_mctrl_null(struct uart_port *port, u_int mctrl)
+{
+}
+
+static void sl2312_break_ctl(struct uart_port *port, int break_state)
+{
+	unsigned int lcr;
+
+//        printk("sl2312 break ctl : \n");
+
+	lcr = UART_GET_LCR(port);
+	if (break_state == -1)
+		lcr |= UART_LCR_SETBREAK;
+	else
+		lcr &= ~UART_LCR_SETBREAK;
+	UART_PUT_LCR(port, lcr);
+}
+
+static inline u_int uart_calculate_quot(struct uart_port *port, u_int baud)
+{
+	u_int quot;
+
+	/* Special case: B0 rate */
+	if (!baud)
+		baud = 9600;
+
+	quot = (port->uartclk / (16 * baud)-1)  ;
+
+	return quot;
+}
+
+static void sl2312_set_termios(struct uart_port *port, struct ktermios *termios,
+                               struct ktermios *old)
+{
+	unsigned int  uart_mc, old_ier, baud, quot;
+	unsigned long flags;
+
+        termios->c_cflag |= CREAD;
+#ifdef DEBUG
+	printk("it8712_set_cflag(0x%x) called\n", cflag);
+#endif
+        baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
+        quot = (port->uartclk / (16 * baud))  ;
+        //uart_get_divisor(port, baud);
+
+	/* byte size and parity */
+	switch (termios->c_cflag & CSIZE) {
+	case CS5:
+              uart_mc = UART_LCR_LEN5;
+              break;
+	case CS6:
+              uart_mc = UART_LCR_LEN6;
+              break;
+	case CS7:
+              uart_mc = UART_LCR_LEN7;
+              break;
+	default: // CS8
+              uart_mc = UART_LCR_LEN8;
+              break;
+	}
+
+	if (termios->c_cflag & CSTOPB)
+		uart_mc|= UART_LCR_STOP;
+	if (termios->c_cflag & PARENB) {
+		uart_mc |= UART_LCR_EVEN;
+		if (!(termios->c_cflag & PARODD))
+			uart_mc |= UART_LCR_ODD;
+	}
+
+    spin_lock_irqsave(&port->lock, flags);
+        /*
+         * Update the per-port timeout
+         */
+        uart_update_timeout(port, termios->c_cflag, baud);
+	port->read_status_mask = UART_LSR_OE;
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (termios->c_iflag & (BRKINT | PARMRK))
+		port->read_status_mask |= UART_LSR_BI;
+
+	/*
+	 * Characters to ignore
+	 */
+	port->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (termios->c_iflag & IGNBRK) {
+		port->ignore_status_mask |= UART_LSR_BI;
+		/*
+		 * If we're ignoring parity and break indicators,
+		 * ignore overruns to (for real raw support).
+		 */
+		if (termios->c_iflag & IGNPAR)
+			port->ignore_status_mask |= UART_LSR_OE;
+	}
+
+	//save_flags(flags); cli();
+	old_ier = UART_GET_IER(port);
+
+        if(UART_ENABLE_MS(port, termios->c_cflag))
+             old_ier |= UART_IER_MS;
+
+	/* Set baud rate */
+	UART_PUT_LCR(port, UART_LCR_DLAB);
+	UART_PUT_DIV_LO(port, (quot & 0xff));
+	UART_PUT_DIV_HI(port, ((quot & 0xf00) >> 8));
+
+	UART_PUT_LCR(port, uart_mc);
+	UART_PUT_IER(port, old_ier);
+
+	//restore_flags(flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+
+
+static int sl2312_startup(struct uart_port *port)
+{
+	int retval;
+	unsigned int regs;
+
+//        printk("sl2312 startup : \n");
+
+	/*
+	 * Use iobase to store a pointer to info. We need this to start a
+	 * transmission as the tranmittr interrupt is only generated on
+	 * the transition to the idle state
+	 */
+
+	/*
+	 * Allocate the IRQ
+	 */
+	retval = request_irq(port->irq, sl2312_int, IRQF_DISABLED, "sl2312", port);
+	if (retval)
+		return retval;
+
+        /* setup interrupt controller  */
+        regs = *((volatile unsigned int *)IRQ_TMODE(IO_ADDRESS(SL2312_INTERRUPT_BASE)));
+        regs &= ~(IRQ_UART_MASK);
+        *((volatile unsigned int *)IRQ_TMODE(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = regs;
+        regs = *((volatile unsigned int *)IRQ_TLEVEL(IO_ADDRESS(SL2312_INTERRUPT_BASE)));
+        regs &= ~(IRQ_UART_MASK);
+        *((volatile unsigned int *)IRQ_TLEVEL(IO_ADDRESS(SL2312_INTERRUPT_BASE))) = regs;
+        *((volatile unsigned int *)IRQ_MASK(IO_ADDRESS(SL2312_INTERRUPT_BASE))) |= (unsigned int)(IRQ_UART_MASK);
+
+	/*
+	 * Finally, enable interrupts. Use the TII interrupt to minimise
+	 * the number of interrupts generated. If higher performance is
+	 * needed, consider using the TI interrupt with a suitable FIFO
+	 * threshold
+	 */
+	UART_PUT_IER(port, (UART_IER_DR|UART_IER_TE));
+
+	return 0;
+}
+
+static void sl2312_shutdown(struct uart_port *port)
+{
+//        printk("sl2312 shutdown : \n");
+
+	/*
+	 * disable all interrupts, disable the port
+	 */
+	UART_PUT_IER(port, 0x0);
+
+	/* disable break condition and fifos */
+//	UART_PUT_MCR(port, (UART_GET_MCR(port)&UART_MCR_MASK));
+
+	/*
+	 * Free the interrupt
+	 */
+	free_irq(port->irq, port);
+}
+
+static const char *sl2312_type(struct uart_port *port)
+{
+	return port->type == PORT_SL2312 ? "SL2312" : NULL;
+}
+
+/*
+ * Release the memory region(s) being used by 'port'
+ */
+static void sl2312_release_port(struct uart_port *port)
+{
+//        printk("sl2312 release port : \n");
+
+	release_mem_region(port->mapbase, UART_PORT_SIZE);
+}
+
+/*
+ * Request the memory region(s) being used by 'port'
+ */
+static int sl2312_request_port(struct uart_port *port)
+{
+	return request_mem_region(port->mapbase, UART_PORT_SIZE,
+				    "serial_sl2312") != NULL ? 0 : -EBUSY;
+}
+
+/*
+ * Configure/autoconfigure the port.
+ */
+static void sl2312_config_port(struct uart_port *port, int flags)
+{
+
+	if (flags & UART_CONFIG_TYPE) {
+		if (sl2312_request_port(port) == 0)
+			port->type = PORT_SL2312;
+	}
+}
+
+/*
+ * verify the new serial_struct (for TIOCSSERIAL).
+ */
+static int sl2312_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+	int ret = 0;
+
+	if (ser->type != PORT_UNKNOWN && ser->type != PORT_UART00)
+		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 sl2312_pops = {
+	.tx_empty		=sl2312_tx_empty,
+	.set_mctrl		=sl2312_set_mctrl_null,
+	.get_mctrl		=sl2312_get_mctrl,
+	.stop_tx		=sl2312_stop_tx,
+	.start_tx		=sl2312_start_tx,
+	.stop_rx		=sl2312_stop_rx,
+	.enable_ms		=sl2312_enable_ms,
+	.break_ctl		=sl2312_break_ctl,
+	.startup		=sl2312_startup,
+	.shutdown		=sl2312_shutdown,
+	.set_termios	=sl2312_set_termios,
+	.type			=sl2312_type,
+	.release_port	=sl2312_release_port,
+	.request_port	=sl2312_request_port,
+	.config_port	=sl2312_config_port,
+	.verify_port	=sl2312_verify_port,
+};
+
+#ifdef CONFIG_ARCH_SL2312
+
+static struct uart_port sl2312_ports[UART_NR] = {
+	{
+		membase:	(void *)IO_ADDRESS(SL2312_UART_BASE),
+		mapbase:	SL2312_UART_BASE,
+		iotype:		SERIAL_IO_MEM,
+		irq:		IRQ_UART,
+		uartclk:	UART_CLK,
+		fifosize:	16,
+		ops:		&sl2312_pops,
+		flags:		ASYNC_BOOT_AUTOCONF,
+	}
+};
+
+#endif
+
+#ifdef CONFIG_SERIAL_SL2312_CONSOLE
+#ifdef used_and_not_const_char_pointer
+static int sl2312_console_read(struct uart_port *port, char *s, u_int count)
+{
+	unsigned int status;
+	int c;
+#ifdef DEBUG
+	printk("sl2312_console_read() called\n");
+#endif
+
+	c = 0;
+	while (c < count) {
+		status = UART_GET_LSR(port);
+ 		if (UART_RX_DATA(status)) {
+			*s++ = UART_GET_CHAR(port);
+			c++;
+		} else {
+			// nothing more to get, return
+			return c;
+		}
+	}
+	// return the count
+	return c;
+}
+#endif
+static void sl2312_console_write(struct console *co, const char *s, unsigned count)
+{
+#ifdef CONFIG_ARCH_SL2312
+	struct uart_port *port = sl2312_ports + co->index;
+	unsigned int status, old_ies;
+	int i;
+
+	/*
+	 *	First save the CR then disable the interrupts
+	 */
+	old_ies = UART_GET_IER(port);
+	UART_PUT_IER(port,0x0);
+
+	/*
+	 *	Now, do each character
+	 */
+	for (i = 0; i < count; i++) {
+		do {
+			status = UART_GET_LSR(port);
+		} while (!UART_TX_READY(status));
+		UART_PUT_CHAR(port, s[i]);
+		if (s[i] == '\n') {
+			do {
+				status = UART_GET_LSR(port);
+			} while (!UART_TX_READY(status));
+			UART_PUT_CHAR(port, '\r');
+		}
+	}
+
+	/*
+	 *	Finally, wait for transmitter to become empty
+	 *	and restore the IES
+	 */
+	do {
+		status = UART_GET_LSR(port);
+	} while (!(status&UART_LSR_TE));
+	UART_PUT_IER(port, old_ies);
+#endif
+}
+
+#if 0
+static void sl2312_console_device(struct console *co,int *index)
+{
+
+	struct uart_driver *p = co->data;
+    *index = co->index;
+    return p->tty_driver;
+
+}
+#endif
+
+static void /*__init*/ sl2312_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
+{
+//	printk("sl2312 console get options : \n");
+
+	u_int uart_mc, quot;
+	uart_mc= UART_GET_MCR(port);
+
+	*parity = 'n';
+	if (uart_mc & UART_LCR_PE) {
+		if (uart_mc & UART_LCR_EVEN)
+			*parity = 'e';
+		else
+			*parity = 'o';
+	}
+
+	switch (uart_mc & UART_LCR_MSK){
+
+	case UART_LCR_LEN5:
+		*bits = 5;
+		break;
+	case UART_LCR_LEN6:
+		*bits = 6;
+		break;
+	case UART_LCR_LEN7:
+		*bits = 7;
+		break;
+	case UART_LCR_LEN8:
+		*bits = 8;
+		break;
+	}
+	UART_PUT_MCR(port,UART_LCR_DLAB);
+	quot = UART_GET_DIV_LO(port) | (UART_GET_DIV_HI(port) << 8);
+	UART_PUT_MCR(port,uart_mc);
+	*baud = port->uartclk / (16 *quot );
+}
+
+static int __init sl2312_console_setup(struct console *co, char *options)
+{
+	struct uart_port *port;
+	int baud = 19200;
+	int bits = 8;
+	int parity = 'n';
+	int flow= 'n';
+
+	printk("sl2312 console setup : \n");
+
+#ifdef CONFIG_ARCH_SL2312
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	port = uart_get_console(sl2312_ports,SL2312_NO_PORTS,co);
+#else
+	return -ENODEV;
+#endif
+
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+	else
+		sl2312_console_get_options(port, &baud, &parity, &bits);
+
+	return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+extern struct uart_driver sl2312_reg;
+static struct console sl2312_console = {
+	.name      = SERIAL_SL2312_NAME,
+	.write		= sl2312_console_write,
+	.device		= uart_console_device,
+//	.device		= sl2312_console_device,
+	.setup		= sl2312_console_setup,
+//	.flags		= (CON_PRINTBUFFER|CON_ENABLED),
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+	.data       = &sl2312_reg,
+};
+
+static int __init sl2312_console_init(void)
+{
+	register_console(&sl2312_console);
+	return 0;
+
+}
+
+console_initcall(sl2312_console_init);
+
+#define SL2312_CONSOLE	&sl2312_console
+#else
+#define SL2312_CONSOLE	NULL
+#endif
+
+// static
+struct uart_driver sl2312_reg = {
+	.owner         = NULL,
+	.driver_name	= SERIAL_SL2312_NAME,
+	.dev_name		= SERIAL_SL2312_NAME,
+	.major          = SERIAL_SL2312_MAJOR,
+	.minor			= SERIAL_SL2312_MINOR,
+	.nr				= UART_NR,
+	.cons			= SL2312_CONSOLE,
+};
+
+static int __init sl2312_init(void)
+{
+       int result;
+	//printk("serial_it8712: it871212_init \n");
+
+        result = uart_register_driver(&sl2312_reg);
+        if(result)
+             return result;
+	result = uart_add_one_port(&sl2312_reg, &sl2312_ports[0]);
+
+        return result;
+}
+
+
+__initcall(sl2312_init);
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -147,6 +147,10 @@
 #define PORT_SB1250_DUART	77
 
 
+/* Storlink Soc */
+#define PORT_SL2312     72
+#define PORT_IT8712     73
+
 #ifdef __KERNEL__
 
 #include <linux/compiler.h>
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -70,6 +70,16 @@ obj-$(CONFIG_R3964)		+= n_r3964.o
 obj-$(CONFIG_APPLICOM)		+= applicom.o
 obj-$(CONFIG_SONYPI)		+= sonypi.o
 obj-$(CONFIG_RTC)		+= rtc.o
+
+###  for Storlink SoC ###
+obj-$(CONFIG_SL2312_RTC) += sl2312_rtc.o
+obj-$(CONFIG_IT8712_GPIO)   += it8712_gpio.o
+obj-$(CONFIG_GEMINI_GPIO)   += gemini_gpio.o
+obj-$(CONFIG_GEMINI_PWC) += gemini_pwr.o
+obj-$(CONFIG_GEMINI_CIR)    += gemini_cir.o
+obj-$(CONFIG_GEMINI_I2S)    += gemini_i2s.o
+obj-$(CONFIG_SL2312_WATCHDOG) += sl2312_wd.o
+
 obj-$(CONFIG_HPET)		+= hpet.o
 obj-$(CONFIG_GEN_RTC)		+= genrtc.o
 obj-$(CONFIG_EFI_RTC)		+= efirtc.o
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -280,6 +280,56 @@ config SERIAL_8250_RM9K
 
 comment "Non-8250 serial port support"
 
+config SERIAL_SL2312
+	bool "SL2312  serial port (sl2312) support"
+	depends on ARCH_SL2312
+	select SERIAL_CORE
+	select SERIAL_SL2312_CONSOLE
+	help
+         Say Y here if you want to use the hard logic uart on SWORD. This
+         driver also supports soft logic implentations of this uart core.
+
+config SERIAL_SL2312_CONSOLE
+	bool "Support for console on SL2312 serial port"
+	depends on SERIAL_SL2312
+	select SERIAL_CORE_CONSOLE
+	help
+        Say Y here if you want to support a serial console on an SWORD
+        hard logic uart or uart00 IP core.
+
+        Even if you say Y here, the currently visible virtual console
+        (/dev/tty0) will still be used as the system console by default, but
+        you can alter that using a kernel command line option such as
+        "console=ttyS0". (Try "man bootparam" or see the documentation of
+        your boot loader (lilo or loadlin) about how to pass options to the
+        kernel at boot time.)
+
+
+config SERIAL_IT8712
+	bool "Sl2312 serial port(IT8712) support"
+	depends on ARM && ARCH_SL2312 && SL2312_LPC
+	select SERIAL_CORE
+	select SERIAL_IT8712_CONSOLE
+	help
+	  Say Y here if you want to use the hard logic uart on Excalibur. This
+	  driver also supports soft logic implentations of this uart core.
+
+config SERIAL_IT8712_CONSOLE
+	bool "Support for console on Sword serial port(IT8712)"
+	depends on SERIAL_IT8712
+	select SERIAL_CORE_CONSOLE
+	help
+	  Say Y here if you want to support a serial console on an Excalibur
+	  hard logic uart or uart00 IP core.
+
+	  Even if you say Y here, the currently visible virtual console
+	  (/dev/tty0) will still be used as the system console by default, but
+	  you can alter that using a kernel command line option such as
+	  "console=ttySI0". (Try "man bootparam" or see the documentation of
+	  your boot loader (lilo or loadlin) about how to pass options to the
+	  kernel at boot time.)
+
+
 config SERIAL_AMBA_PL010
 	tristate "ARM AMBA PL010 serial port support"
 	depends on ARM_AMBA && (BROKEN || !ARCH_VERSATILE)
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -62,5 +62,7 @@ obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_se
 obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o
 obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o
 obj-$(CONFIG_SERIAL_NETX) += netx-serial.o
+obj-$(CONFIG_SERIAL_IT8712) += it8712.o
+obj-$(CONFIG_SERIAL_SL2312) += serial_sl2312.o
 obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o
 obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o