2 files changed, 2018 insertions, 0 deletions

diff --git a/arch/ppc/4xx_io/Makefile b/arch/ppc/4xx_io/Makefile
new file mode 100644
index 000000000000..6a8cd575f382
--- /dev/null
+++ b/arch/ppc/4xx_io/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the linux MPC4xx ppc-specific parts
+#
+
+
+obj-$(CONFIG_SERIAL_SICC)               += serial_sicc.o
diff --git a/arch/ppc/4xx_io/serial_sicc.c b/arch/ppc/4xx_io/serial_sicc.c
new file mode 100644
index 000000000000..e95c48d57571
--- /dev/null
+++ b/arch/ppc/4xx_io/serial_sicc.c
@@ -0,0 +1,2012 @@
+/*
+ *  arch/ppc/4xx_io/serial_sicc.c
+ *
+ *  Driver for IBM STB3xxx SICC serial port
+ *
+ *  Based on drivers/char/serial_amba.c, by ARM Ltd.
+ *
+ *  Copyright 2001 IBM Crop.
+ *  Author: IBM China Research Lab
+ *            Yudong Yang <yangyud@cn.ibm.com>
+ *            Yi Ge       <geyi@cn.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *
+ * This is a driver for SICC serial port on IBM Redwood 4 evaluation board.
+ * The driver support both as a console device and normal serial device and
+ * is compatible with normal ttyS* devices.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.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/bitops.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/serial.h>
+
+
+#include <linux/serialP.h>
+
+
+/* -----------------------------------------------------------------------------
+ *  From STB03xxx SICC UART Specification
+ * -----------------------------------------------------------------------------
+ *  UART Register Offsets.
+ */
+
+#define BL_SICC_LSR   0x0000000      /* line status register read/clear */
+#define BL_SICC_LSRS  0x0000001      /* set line status register read/set */
+#define BL_SICC_HSR   0x0000002      /* handshake status register r/clear */
+#define BL_SICC_HSRS  0x0000003      /* set handshake status register r/set */
+#define BL_SICC_BRDH  0x0000004      /* baudrate divisor high reg r/w */
+#define BL_SICC_BRDL  0x0000005      /* baudrate divisor low reg r/w */
+#define BL_SICC_LCR   0x0000006      /* control register r/w */
+#define BL_SICC_RCR   0x0000007      /* receiver command register r/w */
+#define BL_SICC_TxCR  0x0000008      /* transmitter command register r/w */
+#define BL_SICC_RBR   0x0000009      /* receive buffer r */
+#define BL_SICC_TBR   0x0000009      /* transmit buffer w */
+#define BL_SICC_CTL2  0x000000A      /* added for Vesta */
+#define BL_SICC_IrCR  0x000000B      /* added for Vesta IR */
+
+/* masks and definitions for serial port control register */
+
+#define _LCR_LM_MASK  0xc0            /* loop back modes */
+#define _LCR_DTR_MASK 0x20            /* data terminal ready 0-inactive */
+#define _LCR_RTS_MASK 0x10            /* request to send 0-inactive */
+#define _LCR_DB_MASK  0x08            /* data bits mask */
+#define _LCR_PE_MASK  0x04            /* parity enable */
+#define _LCR_PTY_MASK 0x02            /* parity */
+#define _LCR_SB_MASK  0x01            /* stop bit mask */
+
+#define _LCR_LM_NORM  0x00            /* normal operation */
+#define _LCR_LM_LOOP  0x40            /* internal loopback mode */
+#define _LCR_LM_ECHO  0x80            /* automatic echo mode */
+#define _LCR_LM_RES   0xc0            /* reserved */
+
+#define _LCR_DTR_ACTIVE       _LCR_DTR_MASK /* DTR is active */
+#define _LCR_RTS_ACTIVE       _LCR_RTS_MASK /* RTS is active */
+#define _LCR_DB_8_BITS        _LCR_DB_MASK  /*  8 data bits */
+#define _LCR_DB_7_BITS        0x00          /*  7 data bits */
+#define _LCR_PE_ENABLE        _LCR_PE_MASK  /* parity enabled */
+#define _LCR_PE_DISABLE       0x00          /* parity disabled */
+#define _LCR_PTY_EVEN         0x00          /* even parity */
+#define _LCR_PTY_ODD          _LCR_PTY_MASK /* odd parity */
+#define _LCR_SB_1_BIT         0x00          /* one stop bit */
+#define _LCR_SB_2_BIT         _LCR_SB_MASK  /* two stop bit */
+
+/* serial port handshake register */
+
+#define _HSR_DIS_MASK  0x80            /* DSR input inactive error mask */
+#define _HSR_CS_MASK   0x40            /* CTS input inactive error mask */
+#define _HSR_DIS_ACT   0x00            /* dsr input is active */
+#define _HSR_DIS_INACT _HSR_DIS_MASK   /* dsr input is inactive */
+#define _HSR_CS_ACT    0x00            /* cts input is active */
+#define _HSR_CS_INACT  _HSR_CS_MASK    /* cts input is active */
+
+/* serial port line status register */
+
+#define _LSR_RBR_MASK  0x80            /* receive buffer ready mask */
+#define _LSR_FE_MASK   0x40            /* framing error */
+#define _LSR_OE_MASK   0x20            /* overrun error */
+#define _LSR_PE_MASK   0x10            /* parity error */
+#define _LSR_LB_MASK   0x08            /* line break */
+#define _LSR_TBR_MASK  0x04            /* transmit buffer ready */
+#define _LSR_TSR_MASK  0x02            /* transmit shift register ready */
+
+#define _LSR_RBR_FULL  _LSR_RBR_MASK  /* receive buffer is full */
+#define _LSR_FE_ERROR  _LSR_FE_MASK   /* framing error detected */
+#define _LSR_OE_ERROR  _LSR_OE_MASK   /* overrun error detected */
+#define _LSR_PE_ERROR  _LSR_PE_MASK   /* parity error detected */
+#define _LSR_LB_BREAK  _LSR_LB_MASK   /* line break detected */
+#define _LSR_TBR_EMPTY _LSR_TBR_MASK  /* transmit buffer is ready */
+#define _LSR_TSR_EMPTY _LSR_TSR_MASK  /* transmit shift register is empty */
+#define _LSR_TX_ALL    0x06           /* all physical transmit is done */
+
+#define _LSR_RX_ERR    (_LSR_LB_BREAK | _LSR_FE_MASK | _LSR_OE_MASK | \
+                         _LSR_PE_MASK )
+
+/* serial port receiver command register */
+
+#define _RCR_ER_MASK   0x80           /* enable receiver mask */
+#define _RCR_DME_MASK  0x60           /* dma mode */
+#define _RCR_EIE_MASK  0x10           /* error interrupt enable mask */
+#define _RCR_PME_MASK  0x08           /* pause mode mask */
+
+#define _RCR_ER_ENABLE _RCR_ER_MASK   /* receiver enabled */
+#define _RCR_DME_DISABLE 0x00         /* dma disabled */
+#define _RCR_DME_RXRDY 0x20           /* dma disabled, RxRDY interrupt enabled*/
+#define _RCR_DME_ENABLE2 0x40         /* dma enabled,receiver src channel 2 */
+#define _RCR_DME_ENABLE3 0x60         /* dma enabled,receiver src channel 3 */
+#define _RCR_PME_HARD  _RCR_PME_MASK  /* RTS controlled by hardware */
+#define _RCR_PME_SOFT  0x00           /* RTS controlled by software */
+
+/* serial port transmit command register */
+
+#define _TxCR_ET_MASK   0x80           /* transmiter enable mask */
+#define _TxCR_DME_MASK  0x60           /* dma mode mask */
+#define _TxCR_TIE_MASK  0x10           /* empty interrupt enable mask */
+#define _TxCR_EIE_MASK  0x08           /* error interrupt enable mask */
+#define _TxCR_SPE_MASK  0x04           /* stop/pause mask */
+#define _TxCR_TB_MASK   0x02           /* transmit break mask */
+
+#define _TxCR_ET_ENABLE _TxCR_ET_MASK  /* transmiter enabled */
+#define _TxCR_DME_DISABLE 0x00         /* transmiter disabled, TBR intr disabled */
+#define _TxCR_DME_TBR   0x20           /* transmiter disabled, TBR intr enabled */
+#define _TxCR_DME_CHAN_2 0x40          /* dma enabled, destination chann 2 */
+#define _TxCR_DME_CHAN_3 0x60          /* dma enabled, destination chann 3 */
+
+/* serial ctl reg 2 - added for Vesta */
+
+#define _CTL2_EXTERN  0x80            /*  */
+#define _CTL2_USEFIFO 0x40            /*  */
+#define _CTL2_RESETRF 0x08            /*  */
+#define _CTL2_RESETTF 0x04            /*  */
+
+
+
+#define SERIAL_SICC_NAME    "ttySICC"
+#define SERIAL_SICC_MAJOR   150
+#define SERIAL_SICC_MINOR   1
+#define SERIAL_SICC_NR      1
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+/*
+ * Things needed by tty driver
+ */
+static struct tty_driver *siccnormal_driver;
+
+#if defined(CONFIG_SERIAL_SICC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+/*
+ * Things needed internally to this driver
+ */
+
+/*
+ * tmp_buf is used as a temporary buffer by serial_write.  We need to
+ * lock it in case the copy_from_user blocks while swapping in a page,
+ * and some other program tries to do a serial write at the same time.
+ * Since the lock will only come under contention when the system is
+ * swapping and available memory is low, it makes sense to share one
+ * buffer across all the serial ports, since it significantly saves
+ * memory if large numbers of serial ports are open.
+ */
+static u_char *tmp_buf;
+static DECLARE_MUTEX(tmp_buf_sem);
+
+#define HIGH_BITS_OFFSET    ((sizeof(long)-sizeof(int))*8)
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS        256
+#define SICC_ISR_PASS_LIMIT 256
+
+#define EVT_WRITE_WAKEUP    0
+
+struct SICC_icount {
+    __u32   cts;
+    __u32   dsr;
+    __u32   rng;
+    __u32   dcd;
+    __u32   rx;
+    __u32   tx;
+    __u32   frame;
+    __u32   overrun;
+    __u32   parity;
+    __u32   brk;
+    __u32   buf_overrun;
+};
+
+/*
+ * Static information about the port
+ */
+struct SICC_port {
+    unsigned int        uart_base;
+    unsigned int        uart_base_phys;
+    unsigned int        irqrx;
+    unsigned int        irqtx;
+    unsigned int        uartclk;
+    unsigned int        fifosize;
+    unsigned int        tiocm_support;
+    void (*set_mctrl)(struct SICC_port *, u_int mctrl);
+};
+
+/*
+ * This is the state information which is persistent across opens
+ */
+struct SICC_state {
+    struct SICC_icount  icount;
+    unsigned int        line;
+    unsigned int        close_delay;
+    unsigned int        closing_wait;
+    unsigned int        custom_divisor;
+    unsigned int        flags;
+    int         count;
+    struct SICC_info    *info;
+    spinlock_t          sicc_lock;
+};
+
+#define SICC_XMIT_SIZE 1024
+/*
+ * This is the state information which is only valid when the port is open.
+ */
+struct SICC_info {
+    struct SICC_port    *port;
+    struct SICC_state   *state;
+    struct tty_struct   *tty;
+    unsigned char       x_char;
+    unsigned char       old_status;
+    unsigned char       read_status_mask;
+    unsigned char       ignore_status_mask;
+    struct circ_buf     xmit;
+    unsigned int        flags;
+#ifdef SUPPORT_SYSRQ
+    unsigned long       sysrq;
+#endif
+
+    unsigned int        event;
+    unsigned int        timeout;
+    unsigned int        lcr_h;
+    unsigned int        mctrl;
+    int         blocked_open;
+
+    struct tasklet_struct   tlet;
+
+    wait_queue_head_t   open_wait;
+    wait_queue_head_t   close_wait;
+    wait_queue_head_t   delta_msr_wait;
+};
+
+#ifdef CONFIG_SERIAL_SICC_CONSOLE
+static struct console siccuart_cons;
+#endif
+static void siccuart_change_speed(struct SICC_info *info, struct termios *old_termios);
+static void siccuart_wait_until_sent(struct tty_struct *tty, int timeout);
+
+
+
+static void powerpcMtcic_cr(unsigned long value)
+{
+    mtdcr(DCRN_CICCR, value);
+}
+
+static unsigned long powerpcMfcic_cr(void)
+{
+    return mfdcr(DCRN_CICCR);
+}
+
+static unsigned long powerpcMfclkgpcr(void)
+{
+    return mfdcr(DCRN_SCCR);
+}
+
+static void sicc_set_mctrl_null(struct SICC_port *port, u_int mctrl)
+{
+}
+
+static struct SICC_port sicc_ports[SERIAL_SICC_NR] = {
+    {
+        .uart_base = 0,
+        .uart_base_phys = SICC0_IO_BASE,
+        .irqrx =    SICC0_INTRX,
+        .irqtx =    SICC0_INTTX,
+//      .uartclk =    0,
+        .fifosize = 1,
+        .set_mctrl = sicc_set_mctrl_null,
+    }
+};
+
+static struct SICC_state sicc_state[SERIAL_SICC_NR];
+
+static void siccuart_enable_rx_interrupt(struct SICC_info *info)
+{
+    unsigned char cr;
+
+    cr = readb(info->port->uart_base+BL_SICC_RCR);
+    cr &= ~_RCR_DME_MASK;
+    cr |= _RCR_DME_RXRDY;
+    writeb(cr, info->port->uart_base+BL_SICC_RCR);
+}
+
+static void siccuart_disable_rx_interrupt(struct SICC_info *info)
+{
+    unsigned char cr;
+
+    cr = readb(info->port->uart_base+BL_SICC_RCR);
+    cr &= ~_RCR_DME_MASK;
+    cr |=  _RCR_DME_DISABLE;
+    writeb(cr, info->port->uart_base+BL_SICC_RCR);
+}
+
+
+static void siccuart_enable_tx_interrupt(struct SICC_info *info)
+{
+    unsigned char cr;
+
+    cr = readb(info->port->uart_base+BL_SICC_TxCR);
+    cr &= ~_TxCR_DME_MASK;
+    cr |= _TxCR_DME_TBR;
+    writeb(cr, info->port->uart_base+BL_SICC_TxCR);
+}
+
+static void siccuart_disable_tx_interrupt(struct SICC_info *info)
+{
+    unsigned char cr;
+
+    cr = readb(info->port->uart_base+BL_SICC_TxCR);
+    cr &= ~_TxCR_DME_MASK;
+    cr |=  _TxCR_DME_DISABLE;
+    writeb(cr, info->port->uart_base+BL_SICC_TxCR);
+}
+
+
+static void siccuart_stop(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+
+    /* disable interrupts while stopping serial port interrupts */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    siccuart_disable_tx_interrupt(info);
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+}
+
+static void siccuart_start(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+
+    /* disable interrupts while starting serial port interrupts */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    if (info->xmit.head != info->xmit.tail
+        && info->xmit.buf)
+        siccuart_enable_tx_interrupt(info);
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+}
+
+
+/*
+ * This routine is used by the interrupt handler to schedule
+ * processing in the software interrupt portion of the driver.
+ */
+static void siccuart_event(struct SICC_info *info, int event)
+{
+    info->event |= 1 << event;
+    tasklet_schedule(&info->tlet);
+}
+
+static void
+siccuart_rx_chars(struct SICC_info *info, struct pt_regs *regs)
+{
+    struct tty_struct *tty = info->tty;
+    unsigned int status, ch, rsr, flg, ignored = 0;
+    struct SICC_icount *icount = &info->state->icount;
+    struct SICC_port *port = info->port;
+
+    status = readb(port->uart_base+BL_SICC_LSR );
+    while (status & _LSR_RBR_FULL) {
+        ch = readb(port->uart_base+BL_SICC_RBR);
+
+        if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+            goto ignore_char;
+        icount->rx++;
+
+        flg = TTY_NORMAL;
+
+        /*
+         * Note that the error handling code is
+         * out of the main execution path
+         */
+        rsr = readb(port->uart_base+BL_SICC_LSR);
+        if (rsr & _LSR_RX_ERR)
+            goto handle_error;
+#ifdef SUPPORT_SYSRQ
+        if (info->sysrq) {
+            if (ch && time_before(jiffies, info->sysrq)) {
+                handle_sysrq(ch, regs, NULL);
+                info->sysrq = 0;
+                goto ignore_char;
+            }
+            info->sysrq = 0;
+        }
+#endif
+    error_return:
+        *tty->flip.flag_buf_ptr++ = flg;
+        *tty->flip.char_buf_ptr++ = ch;
+        tty->flip.count++;
+    ignore_char:
+        status = readb(port->uart_base+BL_SICC_LSR );
+    }
+out:
+    tty_flip_buffer_push(tty);
+    return;
+
+handle_error:
+    if (rsr & _LSR_LB_BREAK) {
+        rsr &= ~(_LSR_FE_MASK | _LSR_PE_MASK);
+        icount->brk++;
+
+#ifdef SUPPORT_SYSRQ
+        if (info->state->line == siccuart_cons.index) {
+            if (!info->sysrq) {
+                info->sysrq = jiffies + HZ*5;
+                goto ignore_char;
+            }
+        }
+#endif
+    } else if (rsr & _LSR_PE_MASK)
+        icount->parity++;
+    else if (rsr & _LSR_FE_MASK)
+        icount->frame++;
+    if (rsr & _LSR_OE_MASK)
+        icount->overrun++;
+
+    if (rsr & info->ignore_status_mask) {
+        if (++ignored > 100)
+            goto out;
+        goto ignore_char;
+    }
+    rsr &= info->read_status_mask;
+
+    if (rsr & _LSR_LB_BREAK)
+        flg = TTY_BREAK;
+    else if (rsr &  _LSR_PE_MASK)
+        flg = TTY_PARITY;
+    else if (rsr &  _LSR_FE_MASK)
+        flg = TTY_FRAME;
+
+    if (rsr &  _LSR_OE_MASK) {
+        /*
+         * 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 siccuart_tx_chars(struct SICC_info *info)
+{
+    struct SICC_port *port = info->port;
+    int count;
+        unsigned char status;
+
+
+    if (info->x_char) {
+        writeb(info->x_char, port->uart_base+ BL_SICC_TBR);
+        info->state->icount.tx++;
+        info->x_char = 0;
+        return;
+    }
+    if (info->xmit.head == info->xmit.tail
+        || info->tty->stopped
+        || info->tty->hw_stopped) {
+        siccuart_disable_tx_interrupt(info);
+                writeb(status&(~_LSR_RBR_MASK),port->uart_base+BL_SICC_LSR);
+        return;
+    }
+
+    count = port->fifosize;
+    do {
+        writeb(info->xmit.buf[info->xmit.tail], port->uart_base+ BL_SICC_TBR);
+        info->xmit.tail = (info->xmit.tail + 1) & (SICC_XMIT_SIZE - 1);
+        info->state->icount.tx++;
+        if (info->xmit.head == info->xmit.tail)
+            break;
+    } while (--count > 0);
+
+    if (CIRC_CNT(info->xmit.head,
+             info->xmit.tail,
+             SICC_XMIT_SIZE) < WAKEUP_CHARS)
+        siccuart_event(info, EVT_WRITE_WAKEUP);
+
+    if (info->xmit.head == info->xmit.tail) {
+        siccuart_disable_tx_interrupt(info);
+    }
+}
+
+
+static irqreturn_t siccuart_int_rx(int irq, void *dev_id, struct pt_regs *regs)
+{
+    struct SICC_info *info = dev_id;
+    siccuart_rx_chars(info, regs);
+    return IRQ_HANDLED;
+}
+
+
+static irqreturn_t siccuart_int_tx(int irq, void *dev_id, struct pt_regs *regs)
+{
+    struct SICC_info *info = dev_id;
+    siccuart_tx_chars(info);
+    return IRQ_HANDLED;
+}
+
+static void siccuart_tasklet_action(unsigned long data)
+{
+    struct SICC_info *info = (struct SICC_info *)data;
+    struct tty_struct *tty;
+
+    tty = info->tty;
+    if (!tty || !test_and_clear_bit(EVT_WRITE_WAKEUP, &info->event))
+        return;
+
+    if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+        tty->ldisc.write_wakeup)
+        (tty->ldisc.write_wakeup)(tty);
+    wake_up_interruptible(&tty->write_wait);
+}
+
+static int siccuart_startup(struct SICC_info *info)
+{
+    unsigned long flags;
+    unsigned long page;
+    int retval = 0;
+
+    if (info->flags & ASYNC_INITIALIZED) {
+        return 0;
+    }
+
+    page = get_zeroed_page(GFP_KERNEL);
+    if (!page)
+        return -ENOMEM;
+
+    if (info->port->uart_base == 0)
+        info->port->uart_base = (int)ioremap(info->port->uart_base_phys, PAGE_SIZE);
+    if (info->port->uart_base == 0) {
+        free_page(page);
+        return -ENOMEM;
+    }
+
+    /* lock access to info while doing setup */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+
+    if (info->xmit.buf)
+        free_page(page);
+    else
+        info->xmit.buf = (unsigned char *) page;
+
+
+    info->mctrl = 0;
+    if (info->tty->termios->c_cflag & CBAUD)
+        info->mctrl = TIOCM_RTS | TIOCM_DTR;
+    info->port->set_mctrl(info->port, info->mctrl);
+
+    /*
+     * initialise the old status of the modem signals
+     */
+    info->old_status = 0; // UART_GET_FR(info->port) & AMBA_UARTFR_MODEM_ANY;
+
+
+    if (info->tty)
+        clear_bit(TTY_IO_ERROR, &info->tty->flags);
+    info->xmit.head = info->xmit.tail = 0;
+
+    /*
+     * Set up the tty->alt_speed kludge
+     */
+    if (info->tty) {
+        if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+            info->tty->alt_speed = 57600;
+        if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+            info->tty->alt_speed = 115200;
+        if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+            info->tty->alt_speed = 230400;
+        if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+            info->tty->alt_speed = 460800;
+    }
+
+
+    writeb( 0x00, info->port->uart_base + BL_SICC_IrCR );  // disable IrDA
+
+
+    /*
+     * and set the speed of the serial port
+     */
+    siccuart_change_speed(info, 0);
+
+    // enable rx/tx ports
+    writeb(_RCR_ER_ENABLE /*| _RCR_PME_HARD*/, info->port->uart_base + BL_SICC_RCR);
+    writeb(_TxCR_ET_ENABLE               , info->port->uart_base + BL_SICC_TxCR);
+
+    readb(info->port->uart_base + BL_SICC_RBR); // clear rx port
+
+    writeb(0xf8, info->port->uart_base + BL_SICC_LSR);   /* reset bits 0-4 of LSR */
+
+    /*
+     * Finally, enable interrupts
+     */
+
+     /*
+     * Allocate the IRQ
+     */
+        retval = request_irq(info->port->irqrx, siccuart_int_rx, 0, "SICC rx", info);
+        if (retval) {
+             if (capable(CAP_SYS_ADMIN)) {
+                   if (info->tty)
+                          set_bit(TTY_IO_ERROR, &info->tty->flags);
+                   retval = 0;
+             }
+              goto errout;
+         }
+    retval = request_irq(info->port->irqtx, siccuart_int_tx, 0, "SICC tx", info);
+    if (retval) {
+        if (capable(CAP_SYS_ADMIN)) {
+            if (info->tty)
+                set_bit(TTY_IO_ERROR, &info->tty->flags);
+            retval = 0;
+        }
+        free_irq(info->port->irqrx, info);
+        goto errout;
+    }
+
+    siccuart_enable_rx_interrupt(info);
+
+    info->flags |= ASYNC_INITIALIZED;
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    return 0;
+
+
+errout:
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    return retval;
+}
+
+/*
+ * This routine will shutdown a serial port; interrupts are disabled, and
+ * DTR is dropped if the hangup on close termio flag is on.
+ */
+static void siccuart_shutdown(struct SICC_info *info)
+{
+    unsigned long flags;
+
+    if (!(info->flags & ASYNC_INITIALIZED))
+        return;
+
+    /* lock while shutting down port */
+    spin_lock_irqsave(&info->state->sicc_lock,flags); /* Disable interrupts */
+
+    /*
+     * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+     * here so the queue might never be woken up
+     */
+    wake_up_interruptible(&info->delta_msr_wait);
+
+    /*
+     * disable all interrupts, disable the port
+     */
+    siccuart_disable_rx_interrupt(info);
+    siccuart_disable_tx_interrupt(info);
+
+    /*
+     * Free the IRQ
+     */
+    free_irq(info->port->irqtx, info);
+    free_irq(info->port->irqrx, info);
+
+    if (info->xmit.buf) {
+        unsigned long pg = (unsigned long) info->xmit.buf;
+        info->xmit.buf = NULL;
+        free_page(pg);
+    }
+
+
+    if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+        info->mctrl &= ~(TIOCM_DTR|TIOCM_RTS);
+    info->port->set_mctrl(info->port, info->mctrl);
+
+    /* kill off our tasklet */
+    tasklet_kill(&info->tlet);
+    if (info->tty)
+        set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+    info->flags &= ~ASYNC_INITIALIZED;
+
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+}
+
+
+static void siccuart_change_speed(struct SICC_info *info, struct termios *old_termios)
+{
+    unsigned int lcr_h, baud, quot, cflag, old_rcr, old_tcr, bits;
+    unsigned long flags;
+
+    if (!info->tty || !info->tty->termios)
+        return;
+
+    cflag = info->tty->termios->c_cflag;
+
+    pr_debug("siccuart_set_cflag(0x%x) called\n", cflag);
+    /* byte size and parity */
+    switch (cflag & CSIZE) {
+    case CS7: lcr_h =   _LCR_PE_DISABLE | _LCR_DB_7_BITS | _LCR_SB_1_BIT; bits = 9;  break;
+    default:  lcr_h =   _LCR_PE_DISABLE | _LCR_DB_8_BITS | _LCR_SB_1_BIT; bits = 10; break; // CS8
+    }
+    if (cflag & CSTOPB) {
+        lcr_h |= _LCR_SB_2_BIT;
+        bits ++;
+    }
+    if (cflag & PARENB) {
+        lcr_h |=  _LCR_PE_ENABLE;
+        bits++;
+        if (!(cflag & PARODD))
+            lcr_h |=  _LCR_PTY_ODD;
+        else
+            lcr_h |=  _LCR_PTY_EVEN;
+    }
+
+    do {
+        /* Determine divisor based on baud rate */
+        baud = tty_get_baud_rate(info->tty);
+        if (!baud)
+            baud = 9600;
+
+
+        {
+           // here is ppc403SetBaud(com_port, baud);
+           unsigned long divisor, clockSource, temp;
+
+           /* Ensure CICCR[7] is 0 to select Internal Baud Clock */
+           powerpcMtcic_cr((unsigned long)(powerpcMfcic_cr() & 0xFEFFFFFF));
+
+           /* Determine Internal Baud Clock Frequency */
+           /* powerpcMfclkgpcr() reads DCR 0x120 - the*/
+           /* SCCR (Serial Clock Control Register) on Vesta */
+           temp = powerpcMfclkgpcr();
+
+           if(temp & 0x00000080) {
+               clockSource = 324000000;
+           }
+           else {
+               clockSource = 216000000;
+           }
+           clockSource = clockSource/(unsigned long)((temp&0x00FC0000)>>18);
+           divisor = clockSource/(16*baud) - 1;
+           /* divisor has only 12 bits of resolution */
+           if(divisor>0x00000FFF){
+               divisor=0x00000FFF;
+           }
+
+           quot = divisor;
+        }
+
+        if (baud == 38400 &&
+            ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
+            quot = info->state->custom_divisor;
+
+        if (!quot && old_termios) {
+            info->tty->termios->c_cflag &= ~CBAUD;
+            info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
+            old_termios = NULL;
+        }
+    } while (quot == 0 && old_termios);
+
+    /* As a last resort, if the quotient is zero, default to 9600 bps */
+    if (!quot)
+        quot = (info->port->uartclk / (16 * 9600)) - 1;
+
+    info->timeout = info->port->fifosize * HZ * bits / baud;
+    info->timeout += HZ/50;     /* Add .02 seconds of slop */
+
+    if (cflag & CRTSCTS)
+        info->flags |= ASYNC_CTS_FLOW;
+    else
+        info->flags &= ~ASYNC_CTS_FLOW;
+    if (cflag & CLOCAL)
+        info->flags &= ~ASYNC_CHECK_CD;
+    else
+        info->flags |= ASYNC_CHECK_CD;
+
+    /*
+     * Set up parity check flag
+     */
+#define RELEVENT_IFLAG(iflag)   ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+
+    info->read_status_mask = _LSR_OE_MASK;
+    if (I_INPCK(info->tty))
+        info->read_status_mask |= _LSR_FE_MASK | _LSR_PE_MASK;
+    if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+        info->read_status_mask |= _LSR_LB_MASK;
+
+    /*
+     * Characters to ignore
+     */
+    info->ignore_status_mask = 0;
+    if (I_IGNPAR(info->tty))
+        info->ignore_status_mask |= _LSR_FE_MASK | _LSR_PE_MASK;
+    if (I_IGNBRK(info->tty)) {
+        info->ignore_status_mask |=  _LSR_LB_MASK;
+        /*
+         * If we're ignoring parity and break indicators,
+         * ignore overruns to (for real raw support).
+         */
+        if (I_IGNPAR(info->tty))
+            info->ignore_status_mask |=  _LSR_OE_MASK;
+    }
+
+    /* disable interrupts while reading and clearing registers */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+
+    old_rcr = readb(info->port->uart_base + BL_SICC_RCR);
+    old_tcr = readb(info->port->uart_base + BL_SICC_TxCR);
+
+
+    writeb(0, info->port->uart_base + BL_SICC_RCR);
+    writeb(0, info->port->uart_base + BL_SICC_TxCR);
+
+    /*RLBtrace (&ppc403Chan0, 0x2000000c, 0, 0);*/
+
+
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+
+
+    /* Set baud rate */
+    writeb((quot & 0x00000F00)>>8, info->port->uart_base + BL_SICC_BRDH );
+    writeb( quot & 0x00000FF,      info->port->uart_base + BL_SICC_BRDL );
+
+    /* Set CTL2 reg to use external clock (ExtClk) and enable FIFOs. */
+    /* For now, do NOT use FIFOs since 403 UART did not have this    */
+    /* capability and this driver was inherited from 403UART.        */
+    writeb(_CTL2_EXTERN, info->port->uart_base + BL_SICC_CTL2);
+
+    writeb(lcr_h, info->port->uart_base + BL_SICC_LCR);
+
+    writeb(old_rcr, info->port->uart_base + BL_SICC_RCR);  // restore rcr
+    writeb(old_tcr, info->port->uart_base + BL_SICC_TxCR); // restore txcr
+
+}
+
+
+static void siccuart_put_char(struct tty_struct *tty, u_char ch)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+
+    if (!tty || !info->xmit.buf)
+        return;
+
+    /* lock info->xmit while adding character to tx buffer */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    if (CIRC_SPACE(info->xmit.head, info->xmit.tail, SICC_XMIT_SIZE) != 0) {
+        info->xmit.buf[info->xmit.head] = ch;
+        info->xmit.head = (info->xmit.head + 1) & (SICC_XMIT_SIZE - 1);
+    }
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+}
+
+static void siccuart_flush_chars(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+
+    if (info->xmit.head == info->xmit.tail
+        || tty->stopped
+        || tty->hw_stopped
+        || !info->xmit.buf)
+        return;
+
+    /* disable interrupts while transmitting characters */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    siccuart_enable_tx_interrupt(info);
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+}
+
+static int siccuart_write(struct tty_struct *tty,
+              const u_char * buf, int count)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+    int c, ret = 0;
+
+    if (!tty || !info->xmit.buf || !tmp_buf)
+        return 0;
+
+    /* lock info->xmit while removing characters from buffer */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    while (1) {
+        c = CIRC_SPACE_TO_END(info->xmit.head,
+                      info->xmit.tail,
+                      SICC_XMIT_SIZE);
+        if (count < c)
+            c = count;
+        if (c <= 0)
+            break;
+        memcpy(info->xmit.buf + info->xmit.head, buf, c);
+        info->xmit.head = (info->xmit.head + c) &
+                  (SICC_XMIT_SIZE - 1);
+        buf += c;
+        count -= c;
+        ret += c;
+    }
+    if (info->xmit.head != info->xmit.tail
+        && !tty->stopped
+        && !tty->hw_stopped)
+        siccuart_enable_tx_interrupt(info);
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    return ret;
+}
+
+static int siccuart_write_room(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+
+    return CIRC_SPACE(info->xmit.head, info->xmit.tail, SICC_XMIT_SIZE);
+}
+
+static int siccuart_chars_in_buffer(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+
+    return CIRC_CNT(info->xmit.head, info->xmit.tail, SICC_XMIT_SIZE);
+}
+
+static void siccuart_flush_buffer(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+
+    pr_debug("siccuart_flush_buffer(%d) called\n", tty->index);
+    /* lock info->xmit while zeroing buffer counts */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    info->xmit.head = info->xmit.tail = 0;
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    wake_up_interruptible(&tty->write_wait);
+    if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+        tty->ldisc.write_wakeup)
+        (tty->ldisc.write_wakeup)(tty);
+}
+
+/*
+ * This function is used to send a high-priority XON/XOFF character to
+ * the device
+ */
+static void siccuart_send_xchar(struct tty_struct *tty, char ch)
+{
+    struct SICC_info *info = tty->driver_data;
+
+    info->x_char = ch;
+    if (ch)
+       siccuart_enable_tx_interrupt(info);
+}
+
+static void siccuart_throttle(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+
+    if (I_IXOFF(tty))
+        siccuart_send_xchar(tty, STOP_CHAR(tty));
+
+    if (tty->termios->c_cflag & CRTSCTS) {
+        /* disable interrupts while setting modem control lines */
+        spin_lock_irqsave(&info->state->sicc_lock,flags);
+        info->mctrl &= ~TIOCM_RTS;
+        info->port->set_mctrl(info->port, info->mctrl);
+        spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    }
+}
+
+static void siccuart_unthrottle(struct tty_struct *tty)
+{
+    struct SICC_info *info = (struct SICC_info *) tty->driver_data;
+    unsigned long flags;
+
+    if (I_IXOFF(tty)) {
+        if (info->x_char)
+            info->x_char = 0;
+        else
+            siccuart_send_xchar(tty, START_CHAR(tty));
+    }
+
+    if (tty->termios->c_cflag & CRTSCTS) {
+        /* disable interrupts while setting modem control lines */
+        spin_lock_irqsave(&info->state->sicc_lock,flags);
+        info->mctrl |= TIOCM_RTS;
+        info->port->set_mctrl(info->port, info->mctrl);
+        spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    }
+}
+
+static int get_serial_info(struct SICC_info *info, struct serial_struct *retinfo)
+{
+    struct SICC_state *state = info->state;
+    struct SICC_port *port = info->port;
+    struct serial_struct tmp;
+
+    memset(&tmp, 0, sizeof(tmp));
+    tmp.type       = 0;
+    tmp.line       = state->line;
+    tmp.port       = port->uart_base;
+    if (HIGH_BITS_OFFSET)
+        tmp.port_high = port->uart_base >> HIGH_BITS_OFFSET;
+    tmp.irq        = port->irqrx;
+    tmp.flags      = 0;
+    tmp.xmit_fifo_size = port->fifosize;
+    tmp.baud_base      = port->uartclk / 16;
+    tmp.close_delay    = state->close_delay;
+    tmp.closing_wait   = state->closing_wait;
+    tmp.custom_divisor = state->custom_divisor;
+
+    if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+        return -EFAULT;
+    return 0;
+}
+
+static int set_serial_info(struct SICC_info *info,
+               struct serial_struct *newinfo)
+{
+    struct serial_struct new_serial;
+    struct SICC_state *state, old_state;
+    struct SICC_port *port;
+    unsigned long new_port;
+    unsigned int i, change_irq, change_port;
+    int retval = 0;
+
+    if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
+        return -EFAULT;
+
+    state = info->state;
+    old_state = *state;
+    port = info->port;
+
+    new_port = new_serial.port;
+    if (HIGH_BITS_OFFSET)
+        new_port += (unsigned long) new_serial.port_high << HIGH_BITS_OFFSET;
+
+    change_irq  = new_serial.irq != port->irqrx;
+    change_port = new_port != port->uart_base;
+
+    if (!capable(CAP_SYS_ADMIN)) {
+        if (change_irq || change_port ||
+            (new_serial.baud_base != port->uartclk / 16) ||
+            (new_serial.close_delay != state->close_delay) ||
+            (new_serial.xmit_fifo_size != port->fifosize) ||
+            ((new_serial.flags & ~ASYNC_USR_MASK) !=
+             (state->flags & ~ASYNC_USR_MASK)))
+            return -EPERM;
+        state->flags = ((state->flags & ~ASYNC_USR_MASK) |
+                (new_serial.flags & ASYNC_USR_MASK));
+        info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+                   (new_serial.flags & ASYNC_USR_MASK));
+        state->custom_divisor = new_serial.custom_divisor;
+        goto check_and_exit;
+    }
+
+    if ((new_serial.irq >= NR_IRQS) || (new_serial.irq < 0) ||
+        (new_serial.baud_base < 9600))
+        return -EINVAL;
+
+    if (new_serial.type && change_port) {
+        for (i = 0; i < SERIAL_SICC_NR; i++)
+            if ((port != sicc_ports + i) &&
+                sicc_ports[i].uart_base != new_port)
+                return -EADDRINUSE;
+    }
+
+    if ((change_port || change_irq) && (state->count > 1))
+        return -EBUSY;
+
+    /*
+     * OK, past this point, all the error checking has been done.
+     * At this point, we start making changes.....
+     */
+    port->uartclk = new_serial.baud_base * 16;
+    state->flags = ((state->flags & ~ASYNC_FLAGS) |
+            (new_serial.flags & ASYNC_FLAGS));
+    info->flags = ((state->flags & ~ASYNC_INTERNAL_FLAGS) |
+               (info->flags & ASYNC_INTERNAL_FLAGS));
+    state->custom_divisor = new_serial.custom_divisor;
+    state->close_delay = new_serial.close_delay * HZ / 100;
+    state->closing_wait = new_serial.closing_wait * HZ / 100;
+    info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+    port->fifosize = new_serial.xmit_fifo_size;
+
+    if (change_port || change_irq) {
+        /*
+         * We need to shutdown the serial port at the old
+         * port/irq combination.
+         */
+        siccuart_shutdown(info);
+        port->irqrx = new_serial.irq;
+        port->uart_base = new_port;
+    }
+
+check_and_exit:
+    if (!port->uart_base)
+        return 0;
+    if (info->flags & ASYNC_INITIALIZED) {
+        if ((old_state.flags & ASYNC_SPD_MASK) !=
+            (state->flags & ASYNC_SPD_MASK) ||
+            (old_state.custom_divisor != state->custom_divisor)) {
+            if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+                info->tty->alt_speed = 57600;
+            if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+                info->tty->alt_speed = 115200;
+            if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+                info->tty->alt_speed = 230400;
+            if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+                info->tty->alt_speed = 460800;
+            siccuart_change_speed(info, NULL);
+        }
+    } else
+        retval = siccuart_startup(info);
+    return retval;
+}
+
+
+/*
+ * get_lsr_info - get line status register info
+ */
+static int get_lsr_info(struct SICC_info *info, unsigned int *value)
+{
+    unsigned int result, status;
+    unsigned long flags;
+
+    /* disable interrupts while reading status from port */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    status = readb(info->port->uart_base +  BL_SICC_LSR);
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    result = status & _LSR_TSR_EMPTY ? TIOCSER_TEMT : 0;
+
+    /*
+     * If we're about to load something into the transmit
+     * register, we'll pretend the transmitter isn't empty to
+     * avoid a race condition (depending on when the transmit
+     * interrupt happens).
+     */
+    if (info->x_char ||
+        ((CIRC_CNT(info->xmit.head, info->xmit.tail,
+               SICC_XMIT_SIZE) > 0) &&
+         !info->tty->stopped && !info->tty->hw_stopped))
+        result &= TIOCSER_TEMT;
+
+    return put_user(result, value);
+}
+
+static int get_modem_info(struct SICC_info *info, unsigned int *value)
+{
+    unsigned int result = info->mctrl;
+
+    return put_user(result, value);
+}
+
+static int set_modem_info(struct SICC_info *info, unsigned int cmd,
+              unsigned int *value)
+{
+    unsigned int arg, old;
+    unsigned long flags;
+
+    if (get_user(arg, value))
+        return -EFAULT;
+
+    old = info->mctrl;
+    switch (cmd) {
+    case TIOCMBIS:
+        info->mctrl |= arg;
+        break;
+
+    case TIOCMBIC:
+        info->mctrl &= ~arg;
+        break;
+
+    case TIOCMSET:
+        info->mctrl = arg;
+        break;
+
+    default:
+        return -EINVAL;
+    }
+    /* disable interrupts while setting modem control lines */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    if (old != info->mctrl)
+        info->port->set_mctrl(info->port, info->mctrl);
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    return 0;
+}
+
+static void siccuart_break_ctl(struct tty_struct *tty, int break_state)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+    unsigned int lcr_h;
+
+
+    /* disable interrupts while setting break state */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    lcr_h = readb(info->port + BL_SICC_LSR);
+    if (break_state == -1)
+        lcr_h |=  _LSR_LB_MASK;
+    else
+        lcr_h &= ~_LSR_LB_MASK;
+    writeb(lcr_h, info->port + BL_SICC_LSRS);
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+}
+
+static int siccuart_ioctl(struct tty_struct *tty, struct file *file,
+               unsigned int cmd, unsigned long arg)
+{
+    struct SICC_info *info = tty->driver_data;
+    struct SICC_icount cnow;
+    struct serial_icounter_struct icount;
+    unsigned long flags;
+
+    if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+        (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
+        (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+        if (tty->flags & (1 << TTY_IO_ERROR))
+            return -EIO;
+    }
+
+    switch (cmd) {
+        case TIOCMGET:
+            return get_modem_info(info, (unsigned int *)arg);
+        case TIOCMBIS:
+        case TIOCMBIC:
+        case TIOCMSET:
+            return set_modem_info(info, cmd, (unsigned int *)arg);
+        case TIOCGSERIAL:
+            return get_serial_info(info,
+                           (struct serial_struct *)arg);
+        case TIOCSSERIAL:
+            return set_serial_info(info,
+                           (struct serial_struct *)arg);
+        case TIOCSERGETLSR: /* Get line status register */
+            return get_lsr_info(info, (unsigned int *)arg);
+        /*
+         * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+         * - mask passed in arg for lines of interest
+         *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+         * Caller should use TIOCGICOUNT to see which one it was
+         */
+        case TIOCMIWAIT:
+            return 0;
+        /*
+         * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+         * Return: write counters to the user passed counter struct
+         * NB: both 1->0 and 0->1 transitions are counted except for
+         *     RI where only 0->1 is counted.
+         */
+        case TIOCGICOUNT:
+            /* disable interrupts while getting interrupt count */
+            spin_lock_irqsave(&info->state->sicc_lock,flags);
+            cnow = info->state->icount;
+            spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+            icount.cts = cnow.cts;
+            icount.dsr = cnow.dsr;
+            icount.rng = cnow.rng;
+            icount.dcd = cnow.dcd;
+            icount.rx  = cnow.rx;
+            icount.tx  = cnow.tx;
+            icount.frame = cnow.frame;
+            icount.overrun = cnow.overrun;
+            icount.parity = cnow.parity;
+            icount.brk = cnow.brk;
+            icount.buf_overrun = cnow.buf_overrun;
+
+            return copy_to_user((void *)arg, &icount, sizeof(icount))
+                    ? -EFAULT : 0;
+
+        default:
+            return -ENOIOCTLCMD;
+    }
+    return 0;
+}
+
+static void siccuart_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+    struct SICC_info *info = tty->driver_data;
+    unsigned long flags;
+    unsigned int cflag = tty->termios->c_cflag;
+
+    if ((cflag ^ old_termios->c_cflag) == 0 &&
+        RELEVENT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0)
+        return;
+
+    siccuart_change_speed(info, old_termios);
+
+    /* Handle transition to B0 status */
+    if ((old_termios->c_cflag & CBAUD) &&
+        !(cflag & CBAUD)) {
+        /* disable interrupts while setting break state */
+        spin_lock_irqsave(&info->state->sicc_lock,flags);
+        info->mctrl &= ~(TIOCM_RTS | TIOCM_DTR);
+        info->port->set_mctrl(info->port, info->mctrl);
+        spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    }
+
+    /* Handle transition away from B0 status */
+    if (!(old_termios->c_cflag & CBAUD) &&
+        (cflag & CBAUD)) {
+        /* disable interrupts while setting break state */
+        spin_lock_irqsave(&info->state->sicc_lock,flags);
+        info->mctrl |= TIOCM_DTR;
+        if (!(cflag & CRTSCTS) ||
+            !test_bit(TTY_THROTTLED, &tty->flags))
+            info->mctrl |= TIOCM_RTS;
+        info->port->set_mctrl(info->port, info->mctrl);
+        spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    }
+
+    /* Handle turning off CRTSCTS */
+    if ((old_termios->c_cflag & CRTSCTS) &&
+        !(cflag & CRTSCTS)) {
+        tty->hw_stopped = 0;
+        siccuart_start(tty);
+    }
+
+#if 0
+    /*
+     * No need to wake up processes in open wait, since they
+     * sample the CLOCAL flag once, and don't recheck it.
+     * XXX  It's not clear whether the current behavior is correct
+     * or not.  Hence, this may change.....
+     */
+    if (!(old_termios->c_cflag & CLOCAL) &&
+        (tty->termios->c_cflag & CLOCAL))
+        wake_up_interruptible(&info->open_wait);
+#endif
+}
+
+static void siccuart_close(struct tty_struct *tty, struct file *filp)
+{
+    struct SICC_info *info = tty->driver_data;
+    struct SICC_state *state;
+    unsigned long flags;
+
+    if (!info)
+        return;
+
+    state = info->state;
+
+    //pr_debug("siccuart_close() called\n");
+
+    /* lock tty->driver_data while closing port */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+
+    if (tty_hung_up_p(filp)) {
+        goto quick_close;
+    }
+
+    if ((tty->count == 1) && (state->count != 1)) {
+        /*
+         * Uh, oh.  tty->count is 1, which means that the tty
+         * structure will be freed.  state->count should always
+         * be one in these conditions.  If it's greater than
+         * one, we've got real problems, since it means the
+         * serial port won't be shutdown.
+         */
+        printk("siccuart_close: bad serial port count; tty->count is 1, state->count is %d\n", state->count);
+        state->count = 1;
+    }
+    if (--state->count < 0) {
+        printk("rs_close: bad serial port count for %s: %d\n", tty->name, state->count);
+        state->count = 0;
+    }
+    if (state->count) {
+        goto quick_close;
+    }
+    info->flags |= ASYNC_CLOSING;
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    /*
+     * Now we wait for the transmit buffer to clear; and we notify
+     * the line discipline to only process XON/XOFF characters.
+     */
+    tty->closing = 1;
+    if (info->state->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+        tty_wait_until_sent(tty, info->state->closing_wait);
+    /*
+     * At this point, we stop accepting input.  To do this, we
+     * disable the receive line status interrupts.
+     */
+    if (info->flags & ASYNC_INITIALIZED) {
+        siccuart_disable_rx_interrupt(info);
+        /*
+         * Before we drop DTR, make sure the UART transmitter
+         * has completely drained; this is especially
+         * important if there is a transmit FIFO!
+         */
+        siccuart_wait_until_sent(tty, info->timeout);
+    }
+    siccuart_shutdown(info);
+    if (tty->driver->flush_buffer)
+        tty->driver->flush_buffer(tty);
+    if (tty->ldisc.flush_buffer)
+        tty->ldisc.flush_buffer(tty);
+    tty->closing = 0;
+    info->event = 0;
+    info->tty = NULL;
+    if (info->blocked_open) {
+        if (info->state->close_delay) {
+            set_current_state(TASK_INTERRUPTIBLE);
+            schedule_timeout(info->state->close_delay);
+        }
+        wake_up_interruptible(&info->open_wait);
+    }
+    info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+    wake_up_interruptible(&info->close_wait);
+    return;
+
+quick_close:
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    return;
+}
+
+static void siccuart_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+    struct SICC_info *info = (struct SICC_info *) tty->driver_data;
+    unsigned long char_time, expire;
+
+    if (info->port->fifosize == 0)
+        return;
+
+    /*
+     * Set the check interval to be 1/5 of the estimated time to
+     * send a single character, and make it at least 1.  The check
+     * interval should also be less than the timeout.
+     *
+     * Note: we have to use pretty tight timings here to satisfy
+     * the NIST-PCTS.
+     */
+    char_time = (info->timeout - HZ/50) / info->port->fifosize;
+    char_time = char_time / 5;
+    if (char_time == 0)
+        char_time = 1;
+
+    // Crazy!!   sometimes the input arg 'timeout' can be negtive numbers  :-(
+    if (timeout >= 0 && timeout < char_time)
+        char_time = timeout;
+    /*
+     * If the transmitter hasn't cleared in twice the approximate
+     * amount of time to send the entire FIFO, it probably won't
+     * ever clear.  This assumes the UART isn't doing flow
+     * control, which is currently the case.  Hence, if it ever
+     * takes longer than info->timeout, this is probably due to a
+     * UART bug of some kind.  So, we clamp the timeout parameter at
+     * 2*info->timeout.
+     */
+    if (!timeout || timeout > 2 * info->timeout)
+        timeout = 2 * info->timeout;
+
+    expire = jiffies + timeout;
+    pr_debug("siccuart_wait_until_sent(%d), jiff=%lu, expire=%lu  char_time=%lu...\n",
+           tty->index, jiffies,
+           expire, char_time);
+    while ((readb(info->port->uart_base + BL_SICC_LSR) & _LSR_TX_ALL) != _LSR_TX_ALL) {
+        set_current_state(TASK_INTERRUPTIBLE);
+        schedule_timeout(char_time);
+        if (signal_pending(current))
+            break;
+        if (timeout && time_after(jiffies, expire))
+            break;
+    }
+    set_current_state(TASK_RUNNING);
+}
+
+static void siccuart_hangup(struct tty_struct *tty)
+{
+    struct SICC_info *info = tty->driver_data;
+    struct SICC_state *state = info->state;
+
+    siccuart_flush_buffer(tty);
+    if (info->flags & ASYNC_CLOSING)
+        return;
+    siccuart_shutdown(info);
+    info->event = 0;
+    state->count = 0;
+    info->flags &= ~ASYNC_NORMAL_ACTIVE;
+    info->tty = NULL;
+    wake_up_interruptible(&info->open_wait);
+}
+
+static int block_til_ready(struct tty_struct *tty, struct file *filp,
+               struct SICC_info *info)
+{
+    DECLARE_WAITQUEUE(wait, current);
+    struct SICC_state *state = info->state;
+    unsigned long flags;
+    int do_clocal = 0, extra_count = 0, retval;
+
+    /*
+     * If the device is in the middle of being closed, then block
+     * until it's done, and then try again.
+     */
+    if (tty_hung_up_p(filp) ||
+        (info->flags & ASYNC_CLOSING)) {
+        if (info->flags & ASYNC_CLOSING)
+            interruptible_sleep_on(&info->close_wait);
+        return (info->flags & ASYNC_HUP_NOTIFY) ?
+            -EAGAIN : -ERESTARTSYS;
+    }
+
+    /*
+     * If non-blocking mode is set, or the port is not enabled,
+     * then make the check up front and then exit.
+     */
+    if ((filp->f_flags & O_NONBLOCK) ||
+        (tty->flags & (1 << TTY_IO_ERROR))) {
+        info->flags |= ASYNC_NORMAL_ACTIVE;
+        return 0;
+    }
+
+    if (tty->termios->c_cflag & CLOCAL)
+        do_clocal = 1;
+
+    /*
+     * Block waiting for the carrier detect and the line to become
+     * free (i.e., not in use by the callout).  While we are in
+     * this loop, state->count is dropped by one, so that
+     * rs_close() knows when to free things.  We restore it upon
+     * exit, either normal or abnormal.
+     */
+    retval = 0;
+    add_wait_queue(&info->open_wait, &wait);
+    /* lock while decrementing state->count */
+    spin_lock_irqsave(&info->state->sicc_lock,flags);
+    if (!tty_hung_up_p(filp)) {
+        extra_count = 1;
+        state->count--;
+    }
+    spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+    info->blocked_open++;
+    while (1) {
+        /* disable interrupts while setting modem control lines */
+        spin_lock_irqsave(&info->state->sicc_lock,flags);
+        if (tty->termios->c_cflag & CBAUD) {
+            info->mctrl = TIOCM_DTR | TIOCM_RTS;
+            info->port->set_mctrl(info->port, info->mctrl);
+        }
+        spin_unlock_irqrestore(&info->state->sicc_lock,flags);
+        set_current_state(TASK_INTERRUPTIBLE);
+        if (tty_hung_up_p(filp) ||
+            !(info->flags & ASYNC_INITIALIZED)) {
+            if (info->flags & ASYNC_HUP_NOTIFY)
+                retval = -EAGAIN;
+            else
+                retval = -ERESTARTSYS;
+            break;
+        }
+        if (!(info->flags & ASYNC_CLOSING) &&
+            (do_clocal /*|| (UART_GET_FR(info->port) & SICC_UARTFR_DCD)*/))
+            break;
+        if (signal_pending(current)) {
+            retval = -ERESTARTSYS;
+            break;
+        }
+        schedule();
+    }
+    set_current_state(TASK_RUNNING);
+    remove_wait_queue(&info->open_wait, &wait);
+    if (extra_count)
+        state->count++;
+    info->blocked_open--;
+    if (retval)
+        return retval;
+    info->flags |= ASYNC_NORMAL_ACTIVE;
+    return 0;
+}
+
+static struct SICC_info *siccuart_get(int line)
+{
+    struct SICC_info *info;
+    struct SICC_state *state = sicc_state + line;
+
+    state->count++;
+    if (state->info)
+        return state->info;
+    info = kmalloc(sizeof(struct SICC_info), GFP_KERNEL);
+    if (info) {
+        memset(info, 0, sizeof(struct SICC_info));
+        init_waitqueue_head(&info->open_wait);
+        init_waitqueue_head(&info->close_wait);
+        init_waitqueue_head(&info->delta_msr_wait);
+        info->flags = state->flags;
+        info->state = state;
+        info->port  = sicc_ports + line;
+        tasklet_init(&info->tlet, siccuart_tasklet_action,
+                 (unsigned long)info);
+    }
+    if (state->info) {
+        kfree(info);
+        return state->info;
+    }
+    state->info = info;
+    return info;
+}
+
+static int siccuart_open(struct tty_struct *tty, struct file *filp)
+{
+    struct SICC_info *info;
+    int retval, line = tty->index;
+
+
+    // is this a line that we've got?
+    if (line >= SERIAL_SICC_NR) {
+        return -ENODEV;
+    }
+
+    info = siccuart_get(line);
+    if (!info)
+        return -ENOMEM;
+
+    tty->driver_data = info;
+    info->tty = tty;
+    info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+    /*
+     * Make sure we have the temporary buffer allocated
+     */
+    if (!tmp_buf) {
+        unsigned long page = get_zeroed_page(GFP_KERNEL);
+        if (tmp_buf)
+            free_page(page);
+        else if (!page) {
+            return -ENOMEM;
+        }
+        tmp_buf = (u_char *)page;
+    }
+
+    /*
+     * If the port is in the middle of closing, bail out now.
+     */
+    if (tty_hung_up_p(filp) ||
+        (info->flags & ASYNC_CLOSING)) {
+        if (info->flags & ASYNC_CLOSING)
+            interruptible_sleep_on(&info->close_wait);
+        return -EAGAIN;
+    }
+
+    /*
+     * Start up the serial port
+     */
+    retval = siccuart_startup(info);
+    if (retval) {
+        return retval;
+    }
+
+    retval = block_til_ready(tty, filp, info);
+    if (retval) {
+        return retval;
+    }
+
+#ifdef CONFIG_SERIAL_SICC_CONSOLE
+    if (siccuart_cons.cflag && siccuart_cons.index == line) {
+        tty->termios->c_cflag = siccuart_cons.cflag;
+        siccuart_cons.cflag = 0;
+        siccuart_change_speed(info, NULL);
+    }
+#endif
+    return 0;
+}
+
+static struct tty_operations sicc_ops = {
+        .open = siccuart_open,
+        .close = siccuart_close,
+        .write = siccuart_write,
+        .put_char = siccuart_put_char,
+        .flush_chars = siccuart_flush_chars,
+        .write_room = siccuart_write_room,
+        .chars_in_buffer = siccuart_chars_in_buffer,
+        .flush_buffer  = siccuart_flush_buffer,
+        .ioctl = siccuart_ioctl,
+        .throttle = siccuart_throttle,
+        .unthrottle = siccuart_unthrottle,
+        .send_xchar = siccuart_send_xchar,
+        .set_termios = siccuart_set_termios,
+        .stop = siccuart_stop,
+        .start = siccuart_start,
+        .hangup = siccuart_hangup,
+        .break_ctl = siccuart_break_ctl,
+        .wait_until_sent = siccuart_wait_until_sent,
+};
+
+int __init siccuart_init(void)
+{
+    int i;
+    siccnormal_driver = alloc_tty_driver(SERIAL_SICC_NR);
+    if (!siccnormal_driver)
+        return -ENOMEM;
+    printk("IBM Vesta SICC serial port driver V 0.1 by Yudong Yang and Yi Ge / IBM CRL .\n");
+    siccnormal_driver->driver_name = "serial_sicc";
+    siccnormal_driver->owner = THIS_MODULE;
+    siccnormal_driver->name = SERIAL_SICC_NAME;
+    siccnormal_driver->major = SERIAL_SICC_MAJOR;
+    siccnormal_driver->minor_start = SERIAL_SICC_MINOR;
+    siccnormal_driver->type = TTY_DRIVER_TYPE_SERIAL;
+    siccnormal_driver->subtype = SERIAL_TYPE_NORMAL;
+    siccnormal_driver->init_termios = tty_std_termios;
+    siccnormal_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+    siccnormal_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+    tty_set_operations(siccnormal_driver, &sicc_ops);
+
+    if (tty_register_driver(siccnormal_driver))
+        panic("Couldn't register SICC serial driver\n");
+
+    for (i = 0; i < SERIAL_SICC_NR; i++) {
+        struct SICC_state *state = sicc_state + i;
+        state->line     = i;
+        state->close_delay  = 5 * HZ / 10;
+        state->closing_wait = 30 * HZ;
+        spin_lock_init(&state->sicc_lock);
+    }
+
+
+    return 0;
+}
+
+__initcall(siccuart_init);
+
+#ifdef CONFIG_SERIAL_SICC_CONSOLE
+/************** console driver *****************/
+
+/*
+ * This code is currently never used; console->read is never called.
+ * Therefore, although we have an implementation, we don't use it.
+ * FIXME: the "const char *s" should be fixed to "char *s" some day.
+ * (when the definition in include/linux/console.h is also fixed)
+ */
+#ifdef used_and_not_const_char_pointer
+static int siccuart_console_read(struct console *co, const char *s, u_int count)
+{
+    struct SICC_port *port = &sicc_ports[co->index];
+    unsigned int status;
+    char *w;
+    int c;
+
+    pr_debug("siccuart_console_read() called\n");
+
+    c = 0;
+    w = s;
+    while (c < count) {
+        if(readb(port->uart_base +  BL_SICC_LSR) & _LSR_RBR_FULL) {
+            *w++ = readb(port->uart_base +  BL_SICC_RBR);
+            c++;
+        } else {
+            // nothing more to get, return
+            return c;
+        }
+    }
+    // return the count
+    return c;
+}
+#endif
+
+/*
+ *  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 siccuart_console_write(struct console *co, const char *s, u_int count)
+{
+    struct SICC_port *port = &sicc_ports[co->index];
+    unsigned int old_cr;
+    int i;
+
+    /*
+     *  First save the CR then disable the interrupts
+     */
+    old_cr = readb(port->uart_base +  BL_SICC_TxCR);
+    writeb(old_cr & ~_TxCR_DME_MASK, port->uart_base +  BL_SICC_TxCR);
+
+    /*
+     *  Now, do each character
+     */
+    for (i = 0; i < count; i++) {
+        while ((readb(port->uart_base +  BL_SICC_LSR)&_LSR_TX_ALL) != _LSR_TX_ALL);
+        writeb(s[i], port->uart_base +  BL_SICC_TBR);
+        if (s[i] == '\n') {
+            while ((readb(port->uart_base +  BL_SICC_LSR)&_LSR_TX_ALL) != _LSR_TX_ALL);
+            writeb('\r', port->uart_base +  BL_SICC_TBR);
+        }
+    }
+
+    /*
+     *  Finally, wait for transmitter to become empty
+     *  and restore the TCR
+     */
+    while ((readb(port->uart_base +  BL_SICC_LSR)&_LSR_TX_ALL) != _LSR_TX_ALL);
+    writeb(old_cr, port->uart_base +  BL_SICC_TxCR);
+}
+
+/*
+ *  Receive character from the serial port
+ */
+static int siccuart_console_wait_key(struct console *co)
+{
+    struct SICC_port *port = &sicc_ports[co->index];
+    int c;
+
+    while(!(readb(port->uart_base +  BL_SICC_LSR) & _LSR_RBR_FULL));
+    c = readb(port->uart_base +  BL_SICC_RBR);
+    return c;
+}
+
+static struct tty_driver *siccuart_console_device(struct console *c, int *index)
+{
+        *index = c->index;
+        return siccnormal_driver;
+}
+
+static int __init siccuart_console_setup(struct console *co, char *options)
+{
+    struct SICC_port *port;
+    int baud = 9600;
+    int bits = 8;
+    int parity = 'n';
+    u_int cflag = CREAD | HUPCL | CLOCAL;
+    u_int lcr_h, quot;
+
+
+    if (co->index >= SERIAL_SICC_NR)
+        co->index = 0;
+
+    port = &sicc_ports[co->index];
+
+    if (port->uart_base == 0)
+        port->uart_base = (int)ioremap(port->uart_base_phys, PAGE_SIZE);
+
+    if (options) {
+        char *s = options;
+        baud = simple_strtoul(s, NULL, 10);
+        while (*s >= '0' && *s <= '9')
+            s++;
+        if (*s) parity = *s++;
+        if (*s) bits = *s - '0';
+    }
+
+    /*
+     *    Now construct a cflag setting.
+     */
+    switch (baud) {
+    case 1200:  cflag |= B1200;         break;
+    case 2400:  cflag |= B2400;         break;
+    case 4800:  cflag |= B4800;         break;
+    default:    cflag |= B9600;   baud = 9600;  break;
+    case 19200: cflag |= B19200;        break;
+    case 38400: cflag |= B38400;        break;
+    case 57600: cflag |= B57600;        break;
+    case 115200:    cflag |= B115200;       break;
+    }
+    switch (bits) {
+    case 7:   cflag |= CS7; lcr_h = _LCR_PE_DISABLE | _LCR_DB_7_BITS | _LCR_SB_1_BIT;   break;
+    default:  cflag |= CS8; lcr_h = _LCR_PE_DISABLE | _LCR_DB_8_BITS | _LCR_SB_1_BIT;   break;
+    }
+    switch (parity) {
+    case 'o':
+    case 'O': cflag |= PARODD; lcr_h |= _LCR_PTY_ODD;   break;
+    case 'e':
+    case 'E': cflag |= PARENB; lcr_h |= _LCR_PE_ENABLE |  _LCR_PTY_ODD; break;
+    }
+
+    co->cflag = cflag;
+
+
+       {
+           // a copy of is inserted here ppc403SetBaud(com_port, (int)9600);
+           unsigned long divisor, clockSource, temp;
+           unsigned int rate = baud;
+
+          /* Ensure CICCR[7] is 0 to select Internal Baud Clock */
+          powerpcMtcic_cr((unsigned long)(powerpcMfcic_cr() & 0xFEFFFFFF));
+
+          /* Determine Internal Baud Clock Frequency */
+          /* powerpcMfclkgpcr() reads DCR 0x120 - the*/
+          /* SCCR (Serial Clock Control Register) on Vesta */
+          temp = powerpcMfclkgpcr();
+
+          if(temp & 0x00000080) {
+              clockSource = 324000000;
+          }
+          else {
+              clockSource = 216000000;
+          }
+          clockSource = clockSource/(unsigned long)((temp&0x00FC0000)>>18);
+          divisor = clockSource/(16*rate) - 1;
+          /* divisor has only 12 bits of resolution */
+          if(divisor>0x00000FFF){
+               divisor=0x00000FFF;
+          }
+
+          quot = divisor;
+       }
+
+    writeb((quot & 0x00000F00)>>8, port->uart_base + BL_SICC_BRDH );
+    writeb( quot & 0x00000FF,      port->uart_base   + BL_SICC_BRDL );
+
+    /* Set CTL2 reg to use external clock (ExtClk) and enable FIFOs. */
+    /* For now, do NOT use FIFOs since 403 UART did not have this    */
+    /* capability and this driver was inherited from 403UART.        */
+    writeb(_CTL2_EXTERN, port->uart_base  + BL_SICC_CTL2);
+
+    writeb(lcr_h, port->uart_base + BL_SICC_LCR);
+    writeb(_RCR_ER_ENABLE | _RCR_PME_HARD, port->uart_base + BL_SICC_RCR);
+    writeb( _TxCR_ET_ENABLE , port->uart_base + BL_SICC_TxCR);
+
+    // writeb(, info->port->uart_base + BL_SICC_RCR );
+    /*
+     * Transmitter Command Register: Transmitter enabled & DMA + TBR interrupt
+     * + Transmitter Empty interrupt + Transmitter error interrupt disabled &
+     * Stop mode when CTS active enabled & Transmit Break + Pattern Generation
+     * mode disabled.
+     */
+
+    writeb( 0x00, port->uart_base + BL_SICC_IrCR );  // disable IrDA
+
+    readb(port->uart_base + BL_SICC_RBR);
+
+    writeb(0xf8, port->uart_base + BL_SICC_LSR);   /* reset bits 0-4 of LSR */
+
+    /* we will enable the port as we need it */
+
+    return 0;
+}
+
+static struct console siccuart_cons =
+{
+    .name =     SERIAL_SICC_NAME,
+    .write =    siccuart_console_write,
+#ifdef used_and_not_const_char_pointer
+    .read =     siccuart_console_read,
+#endif
+    .device =   siccuart_console_device,
+    .wait_key = siccuart_console_wait_key,
+    .setup =    siccuart_console_setup,
+    .flags =    CON_PRINTBUFFER,
+    .index =    -1,
+};
+
+void __init sicc_console_init(void)
+{
+    register_console(&siccuart_cons);
+}
+
+#endif /* CONFIG_SERIAL_SICC_CONSOLE */