Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 877 insertions, 0 deletions

diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
new file mode 100644
index 000000000000..68b25b2c26b1
--- /dev/null
+++ b/drivers/serial/pxa.c
@@ -0,0 +1,877 @@
+/*
+ *  linux/drivers/serial/pxa.c
+ *
+ *  Based on drivers/serial/8250.c by Russell King.
+ *
+ *  Author:     Nicolas Pitre
+ *  Created:    Feb 20, 2003
+ *  Copyright:  (C) 2003 Monta Vista Software, Inc.
+ *
+ * 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.
+ *
+ * Note 1: This driver is made separate from the already too overloaded
+ * 8250.c because it needs some kirks of its own and that'll make it
+ * easier to add DMA support.
+ *
+ * Note 2: I'm too sick of device allocation policies for serial ports.
+ * If someone else wants to request an "official" allocation of major/minor
+ * for this driver please be my guest.  And don't forget that new hardware
+ * to come from Intel might have more than 3 or 4 of those UARTs.  Let's
+ * hope for a better port registration and dynamic device allocation scheme
+ * with the serial core maintainer satisfaction to appear soon.
+ */
+
+#include <linux/config.h>
+
+#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <linux/serial_reg.h>
+#include <linux/circ_buf.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial_core.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/arch/pxa-regs.h>
+
+
+struct uart_pxa_port {
+        struct uart_port        port;
+        unsigned char           ier;
+        unsigned char           lcr;
+        unsigned char           mcr;
+        unsigned int            lsr_break_flag;
+        unsigned int            cken;
+        char                    *name;
+};
+
+static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
+{
+        offset <<= 2;
+        return readl(up->port.membase + offset);
+}
+
+static inline void serial_out(struct uart_pxa_port *up, int offset, int value)
+{
+        offset <<= 2;
+        writel(value, up->port.membase + offset);
+}
+
+static void serial_pxa_enable_ms(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+
+        up->ier |= UART_IER_MSI;
+        serial_out(up, UART_IER, up->ier);
+}
+
+static void serial_pxa_stop_tx(struct uart_port *port, unsigned int tty_stop)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+
+        if (up->ier & UART_IER_THRI) {
+                up->ier &= ~UART_IER_THRI;
+                serial_out(up, UART_IER, up->ier);
+        }
+}
+
+static void serial_pxa_stop_rx(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+
+        up->ier &= ~UART_IER_RLSI;
+        up->port.read_status_mask &= ~UART_LSR_DR;
+        serial_out(up, UART_IER, up->ier);
+}
+
+static inline void
+receive_chars(struct uart_pxa_port *up, int *status, struct pt_regs *regs)
+{
+        struct tty_struct *tty = up->port.info->tty;
+        unsigned int ch, flag;
+        int max_count = 256;
+
+        do {
+                if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
+                        if (tty->low_latency)
+                                tty_flip_buffer_push(tty);
+                        /*
+                         * If this failed then we will throw away the
+                         * bytes but must do so to clear interrupts
+                         */
+                }
+                ch = serial_in(up, UART_RX);
+                flag = TTY_NORMAL;
+                up->port.icount.rx++;
+
+                if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
+                                       UART_LSR_FE | UART_LSR_OE))) {
+                        /*
+                         * For statistics only
+                         */
+                        if (*status & UART_LSR_BI) {
+                                *status &= ~(UART_LSR_FE | UART_LSR_PE);
+                                up->port.icount.brk++;
+                                /*
+                                 * We do the SysRQ and SAK checking
+                                 * here because otherwise the break
+                                 * may get masked by ignore_status_mask
+                                 * or read_status_mask.
+                                 */
+                                if (uart_handle_break(&up->port))
+                                        goto ignore_char;
+                        } else if (*status & UART_LSR_PE)
+                                up->port.icount.parity++;
+                        else if (*status & UART_LSR_FE)
+                                up->port.icount.frame++;
+                        if (*status & UART_LSR_OE)
+                                up->port.icount.overrun++;
+
+                        /*
+                         * Mask off conditions which should be ignored.
+                         */
+                        *status &= up->port.read_status_mask;
+
+#ifdef CONFIG_SERIAL_PXA_CONSOLE
+                        if (up->port.line == up->port.cons->index) {
+                                /* Recover the break flag from console xmit */
+                                *status |= up->lsr_break_flag;
+                                up->lsr_break_flag = 0;
+                        }
+#endif
+                        if (*status & UART_LSR_BI) {
+                                flag = TTY_BREAK;
+                        } else if (*status & UART_LSR_PE)
+                                flag = TTY_PARITY;
+                        else if (*status & UART_LSR_FE)
+                                flag = TTY_FRAME;
+                }
+                if (uart_handle_sysrq_char(&up->port, ch, regs))
+                        goto ignore_char;
+                if ((*status & up->port.ignore_status_mask) == 0) {
+                        tty_insert_flip_char(tty, ch, flag);
+                }
+                if ((*status & UART_LSR_OE) &&
+                    tty->flip.count < TTY_FLIPBUF_SIZE) {
+                        /*
+                         * Overrun is special, since it's reported
+                         * immediately, and doesn't affect the current
+                         * character.
+                         */
+                        tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+                }
+        ignore_char:
+                *status = serial_in(up, UART_LSR);
+        } while ((*status & UART_LSR_DR) && (max_count-- > 0));
+        tty_flip_buffer_push(tty);
+}
+
+static void transmit_chars(struct uart_pxa_port *up)
+{
+        struct circ_buf *xmit = &up->port.info->xmit;
+        int count;
+
+        if (up->port.x_char) {
+                serial_out(up, UART_TX, up->port.x_char);
+                up->port.icount.tx++;
+                up->port.x_char = 0;
+                return;
+        }
+        if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
+                serial_pxa_stop_tx(&up->port, 0);
+                return;
+        }
+
+        count = up->port.fifosize / 2;
+        do {
+                serial_out(up, UART_TX, xmit->buf[xmit->tail]);
+                xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+                up->port.icount.tx++;
+                if (uart_circ_empty(xmit))
+                        break;
+        } while (--count > 0);
+
+        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+                uart_write_wakeup(&up->port);
+
+
+        if (uart_circ_empty(xmit))
+                serial_pxa_stop_tx(&up->port, 0);
+}
+
+static void serial_pxa_start_tx(struct uart_port *port, unsigned int tty_start)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+
+        if (!(up->ier & UART_IER_THRI)) {
+                up->ier |= UART_IER_THRI;
+                serial_out(up, UART_IER, up->ier);
+        }
+}
+
+static inline void check_modem_status(struct uart_pxa_port *up)
+{
+        int status;
+
+        status = serial_in(up, UART_MSR);
+
+        if ((status & UART_MSR_ANY_DELTA) == 0)
+                return;
+
+        if (status & UART_MSR_TERI)
+                up->port.icount.rng++;
+        if (status & UART_MSR_DDSR)
+                up->port.icount.dsr++;
+        if (status & UART_MSR_DDCD)
+                uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
+        if (status & UART_MSR_DCTS)
+                uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
+
+        wake_up_interruptible(&up->port.info->delta_msr_wait);
+}
+
+/*
+ * This handles the interrupt from one port.
+ */
+static inline irqreturn_t
+serial_pxa_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)dev_id;
+        unsigned int iir, lsr;
+
+        iir = serial_in(up, UART_IIR);
+        if (iir & UART_IIR_NO_INT)
+                return IRQ_NONE;
+        lsr = serial_in(up, UART_LSR);
+        if (lsr & UART_LSR_DR)
+                receive_chars(up, &lsr, regs);
+        check_modem_status(up);
+        if (lsr & UART_LSR_THRE)
+                transmit_chars(up);
+        return IRQ_HANDLED;
+}
+
+static unsigned int serial_pxa_tx_empty(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned long flags;
+        unsigned int ret;
+
+        spin_lock_irqsave(&up->port.lock, flags);
+        ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
+        spin_unlock_irqrestore(&up->port.lock, flags);
+
+        return ret;
+}
+
+static unsigned int serial_pxa_get_mctrl(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned long flags;
+        unsigned char status;
+        unsigned int ret;
+
+return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+        spin_lock_irqsave(&up->port.lock, flags);
+        status = serial_in(up, UART_MSR);
+        spin_unlock_irqrestore(&up->port.lock, flags);
+
+        ret = 0;
+        if (status & UART_MSR_DCD)
+                ret |= TIOCM_CAR;
+        if (status & UART_MSR_RI)
+                ret |= TIOCM_RNG;
+        if (status & UART_MSR_DSR)
+                ret |= TIOCM_DSR;
+        if (status & UART_MSR_CTS)
+                ret |= TIOCM_CTS;
+        return ret;
+}
+
+static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned char mcr = 0;
+
+        if (mctrl & TIOCM_RTS)
+                mcr |= UART_MCR_RTS;
+        if (mctrl & TIOCM_DTR)
+                mcr |= UART_MCR_DTR;
+        if (mctrl & TIOCM_OUT1)
+                mcr |= UART_MCR_OUT1;
+        if (mctrl & TIOCM_OUT2)
+                mcr |= UART_MCR_OUT2;
+        if (mctrl & TIOCM_LOOP)
+                mcr |= UART_MCR_LOOP;
+
+        mcr |= up->mcr;
+
+        serial_out(up, UART_MCR, mcr);
+}
+
+static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned long flags;
+
+        spin_lock_irqsave(&up->port.lock, flags);
+        if (break_state == -1)
+                up->lcr |= UART_LCR_SBC;
+        else
+                up->lcr &= ~UART_LCR_SBC;
+        serial_out(up, UART_LCR, up->lcr);
+        spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+#if 0
+static void serial_pxa_dma_init(struct pxa_uart *up)
+{
+        up->rxdma =
+                pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_receive_dma, up);
+        if (up->rxdma < 0)
+                goto out;
+        up->txdma =
+                pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_transmit_dma, up);
+        if (up->txdma < 0)
+                goto err_txdma;
+        up->dmadesc = kmalloc(4 * sizeof(pxa_dma_desc), GFP_KERNEL);
+        if (!up->dmadesc)
+                goto err_alloc;
+
+        /* ... */
+err_alloc:
+        pxa_free_dma(up->txdma);
+err_rxdma:
+        pxa_free_dma(up->rxdma);
+out:
+        return;
+}
+#endif
+
+static int serial_pxa_startup(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned long flags;
+        int retval;
+
+        up->mcr = 0;
+
+        /*
+         * Allocate the IRQ
+         */
+        retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up);
+        if (retval)
+                return retval;
+
+        /*
+         * Clear the FIFO buffers and disable them.
+         * (they will be reenabled in set_termios())
+         */
+        serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
+        serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
+                        UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
+        serial_out(up, UART_FCR, 0);
+
+        /*
+         * Clear the interrupt registers.
+         */
+        (void) serial_in(up, UART_LSR);
+        (void) serial_in(up, UART_RX);
+        (void) serial_in(up, UART_IIR);
+        (void) serial_in(up, UART_MSR);
+
+        /*
+         * Now, initialize the UART
+         */
+        serial_out(up, UART_LCR, UART_LCR_WLEN8);
+
+        spin_lock_irqsave(&up->port.lock, flags);
+        up->port.mctrl |= TIOCM_OUT2;
+        serial_pxa_set_mctrl(&up->port, up->port.mctrl);
+        spin_unlock_irqrestore(&up->port.lock, flags);
+
+        /*
+         * Finally, enable interrupts.  Note: Modem status interrupts
+         * are set via set_termios(), which will be occuring imminently
+         * anyway, so we don't enable them here.
+         */
+        up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE;
+        serial_out(up, UART_IER, up->ier);
+
+        /*
+         * And clear the interrupt registers again for luck.
+         */
+        (void) serial_in(up, UART_LSR);
+        (void) serial_in(up, UART_RX);
+        (void) serial_in(up, UART_IIR);
+        (void) serial_in(up, UART_MSR);
+
+        return 0;
+}
+
+static void serial_pxa_shutdown(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned long flags;
+
+        free_irq(up->port.irq, up);
+
+        /*
+         * Disable interrupts from this port
+         */
+        up->ier = 0;
+        serial_out(up, UART_IER, 0);
+
+        spin_lock_irqsave(&up->port.lock, flags);
+        up->port.mctrl &= ~TIOCM_OUT2;
+        serial_pxa_set_mctrl(&up->port, up->port.mctrl);
+        spin_unlock_irqrestore(&up->port.lock, flags);
+
+        /*
+         * Disable break condition and FIFOs
+         */
+        serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
+        serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
+                                  UART_FCR_CLEAR_RCVR |
+                                  UART_FCR_CLEAR_XMIT);
+        serial_out(up, UART_FCR, 0);
+}
+
+static void
+serial_pxa_set_termios(struct uart_port *port, struct termios *termios,
+                       struct termios *old)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned char cval, fcr = 0;
+        unsigned long flags;
+        unsigned int baud, quot;
+
+        switch (termios->c_cflag & CSIZE) {
+        case CS5:
+                cval = 0x00;
+                break;
+        case CS6:
+                cval = 0x01;
+                break;
+        case CS7:
+                cval = 0x02;
+                break;
+        default:
+        case CS8:
+                cval = 0x03;
+                break;
+        }
+
+        if (termios->c_cflag & CSTOPB)
+                cval |= 0x04;
+        if (termios->c_cflag & PARENB)
+                cval |= UART_LCR_PARITY;
+        if (!(termios->c_cflag & PARODD))
+                cval |= UART_LCR_EPAR;
+
+        /*
+         * Ask the core to calculate the divisor for us.
+         */
+        baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
+        quot = uart_get_divisor(port, baud);
+
+        if ((up->port.uartclk / quot) < (2400 * 16))
+                fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1;
+        else
+                fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8;
+
+        /*
+         * Ok, we're now changing the port state.  Do it with
+         * interrupts disabled.
+         */
+        spin_lock_irqsave(&up->port.lock, flags);
+
+        /*
+         * Ensure the port will be enabled.
+         * This is required especially for serial console.
+         */
+        up->ier |= IER_UUE;
+
+        /*
+         * Update the per-port timeout.
+         */
+        uart_update_timeout(port, termios->c_cflag, quot);
+
+        up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
+        if (termios->c_iflag & INPCK)
+                up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+        if (termios->c_iflag & (BRKINT | PARMRK))
+                up->port.read_status_mask |= UART_LSR_BI;
+
+        /*
+         * Characters to ignore
+         */
+        up->port.ignore_status_mask = 0;
+        if (termios->c_iflag & IGNPAR)
+                up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+        if (termios->c_iflag & IGNBRK) {
+                up->port.ignore_status_mask |= UART_LSR_BI;
+                /*
+                 * If we're ignoring parity and break indicators,
+                 * ignore overruns too (for real raw support).
+                 */
+                if (termios->c_iflag & IGNPAR)
+                        up->port.ignore_status_mask |= UART_LSR_OE;
+        }
+
+        /*
+         * ignore all characters if CREAD is not set
+         */
+        if ((termios->c_cflag & CREAD) == 0)
+                up->port.ignore_status_mask |= UART_LSR_DR;
+
+        /*
+         * CTS flow control flag and modem status interrupts
+         */
+        up->ier &= ~UART_IER_MSI;
+        if (UART_ENABLE_MS(&up->port, termios->c_cflag))
+                up->ier |= UART_IER_MSI;
+
+        serial_out(up, UART_IER, up->ier);
+
+        serial_out(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
+        serial_out(up, UART_DLL, quot & 0xff);          /* LS of divisor */
+        serial_out(up, UART_DLM, quot >> 8);            /* MS of divisor */
+        serial_out(up, UART_LCR, cval);         /* reset DLAB */
+        up->lcr = cval;                                 /* Save LCR */
+        serial_pxa_set_mctrl(&up->port, up->port.mctrl);
+        serial_out(up, UART_FCR, fcr);
+        spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+static void
+serial_pxa_pm(struct uart_port *port, unsigned int state,
+              unsigned int oldstate)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        pxa_set_cken(up->cken, !state);
+        if (!state)
+                udelay(1);
+}
+
+static void serial_pxa_release_port(struct uart_port *port)
+{
+}
+
+static int serial_pxa_request_port(struct uart_port *port)
+{
+        return 0;
+}
+
+static void serial_pxa_config_port(struct uart_port *port, int flags)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        up->port.type = PORT_PXA;
+}
+
+static int
+serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+        /* we don't want the core code to modify any port params */
+        return -EINVAL;
+}
+
+static const char *
+serial_pxa_type(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        return up->name;
+}
+
+#ifdef CONFIG_SERIAL_PXA_CONSOLE
+
+extern struct uart_pxa_port serial_pxa_ports[];
+extern struct uart_driver serial_pxa_reg;
+
+#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
+
+/*
+ *      Wait for transmitter & holding register to empty
+ */
+static inline void wait_for_xmitr(struct uart_pxa_port *up)
+{
+        unsigned int status, tmout = 10000;
+
+        /* Wait up to 10ms for the character(s) to be sent. */
+        do {
+                status = serial_in(up, UART_LSR);
+
+                if (status & UART_LSR_BI)
+                        up->lsr_break_flag = UART_LSR_BI;
+
+                if (--tmout == 0)
+                        break;
+                udelay(1);
+        } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
+
+        /* Wait up to 1s for flow control if necessary */
+        if (up->port.flags & UPF_CONS_FLOW) {
+                tmout = 1000000;
+                while (--tmout &&
+                       ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
+                        udelay(1);
+        }
+}
+
+/*
+ * Print a string to the serial port trying not to disturb
+ * any possible real use of the port...
+ *
+ *      The console_lock must be held when we get here.
+ */
+static void
+serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
+{
+        struct uart_pxa_port *up = &serial_pxa_ports[co->index];
+        unsigned int ier;
+        int i;
+
+        /*
+         *      First save the UER then disable the interrupts
+         */
+        ier = serial_in(up, UART_IER);
+        serial_out(up, UART_IER, UART_IER_UUE);
+
+        /*
+         *      Now, do each character
+         */
+        for (i = 0; i < count; i++, s++) {
+                wait_for_xmitr(up);
+
+                /*
+                 *      Send the character out.
+                 *      If a LF, also do CR...
+                 */
+                serial_out(up, UART_TX, *s);
+                if (*s == 10) {
+                        wait_for_xmitr(up);
+                        serial_out(up, UART_TX, 13);
+                }
+        }
+
+        /*
+         *      Finally, wait for transmitter to become empty
+         *      and restore the IER
+         */
+        wait_for_xmitr(up);
+        serial_out(up, UART_IER, ier);
+}
+
+static int __init
+serial_pxa_console_setup(struct console *co, char *options)
+{
+        struct uart_pxa_port *up;
+        int baud = 9600;
+        int bits = 8;
+        int parity = 'n';
+        int flow = 'n';
+
+        if (co->index == -1 || co->index >= serial_pxa_reg.nr)
+                co->index = 0;
+        up = &serial_pxa_ports[co->index];
+
+        if (options)
+                uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+        return uart_set_options(&up->port, co, baud, parity, bits, flow);
+}
+
+static struct console serial_pxa_console = {
+        .name           = "ttyS",
+        .write          = serial_pxa_console_write,
+        .device         = uart_console_device,
+        .setup          = serial_pxa_console_setup,
+        .flags          = CON_PRINTBUFFER,
+        .index          = -1,
+        .data           = &serial_pxa_reg,
+};
+
+static int __init
+serial_pxa_console_init(void)
+{
+        register_console(&serial_pxa_console);
+        return 0;
+}
+
+console_initcall(serial_pxa_console_init);
+
+#define PXA_CONSOLE     &serial_pxa_console
+#else
+#define PXA_CONSOLE     NULL
+#endif
+
+struct uart_ops serial_pxa_pops = {
+        .tx_empty       = serial_pxa_tx_empty,
+        .set_mctrl      = serial_pxa_set_mctrl,
+        .get_mctrl      = serial_pxa_get_mctrl,
+        .stop_tx        = serial_pxa_stop_tx,
+        .start_tx       = serial_pxa_start_tx,
+        .stop_rx        = serial_pxa_stop_rx,
+        .enable_ms      = serial_pxa_enable_ms,
+        .break_ctl      = serial_pxa_break_ctl,
+        .startup        = serial_pxa_startup,
+        .shutdown       = serial_pxa_shutdown,
+        .set_termios    = serial_pxa_set_termios,
+        .pm             = serial_pxa_pm,
+        .type           = serial_pxa_type,
+        .release_port   = serial_pxa_release_port,
+        .request_port   = serial_pxa_request_port,
+        .config_port    = serial_pxa_config_port,
+        .verify_port    = serial_pxa_verify_port,
+};
+
+static struct uart_pxa_port serial_pxa_ports[] = {
+     {  /* FFUART */
+        .name   = "FFUART",
+        .cken   = CKEN6_FFUART,
+        .port   = {
+                .type           = PORT_PXA,
+                .iotype         = UPIO_MEM,
+                .membase        = (void *)&FFUART,
+                .mapbase        = __PREG(FFUART),
+                .irq            = IRQ_FFUART,
+                .uartclk        = 921600 * 16,
+                .fifosize       = 64,
+                .ops            = &serial_pxa_pops,
+                .line           = 0,
+        },
+  }, {  /* BTUART */
+        .name   = "BTUART",
+        .cken   = CKEN7_BTUART,
+        .port   = {
+                .type           = PORT_PXA,
+                .iotype         = UPIO_MEM,
+                .membase        = (void *)&BTUART,
+                .mapbase        = __PREG(BTUART),
+                .irq            = IRQ_BTUART,
+                .uartclk        = 921600 * 16,
+                .fifosize       = 64,
+                .ops            = &serial_pxa_pops,
+                .line           = 1,
+        },
+  }, {  /* STUART */
+        .name   = "STUART",
+        .cken   = CKEN5_STUART,
+        .port   = {
+                .type           = PORT_PXA,
+                .iotype         = UPIO_MEM,
+                .membase        = (void *)&STUART,
+                .mapbase        = __PREG(STUART),
+                .irq            = IRQ_STUART,
+                .uartclk        = 921600 * 16,
+                .fifosize       = 64,
+                .ops            = &serial_pxa_pops,
+                .line           = 2,
+        },
+  }
+};
+
+static struct uart_driver serial_pxa_reg = {
+        .owner          = THIS_MODULE,
+        .driver_name    = "PXA serial",
+        .devfs_name     = "tts/",
+        .dev_name       = "ttyS",
+        .major          = TTY_MAJOR,
+        .minor          = 64,
+        .nr             = ARRAY_SIZE(serial_pxa_ports),
+        .cons           = PXA_CONSOLE,
+};
+
+static int serial_pxa_suspend(struct device *_dev, u32 state, u32 level)
+{
+        struct uart_pxa_port *sport = dev_get_drvdata(_dev);
+
+        if (sport && level == SUSPEND_DISABLE)
+                uart_suspend_port(&serial_pxa_reg, &sport->port);
+
+        return 0;
+}
+
+static int serial_pxa_resume(struct device *_dev, u32 level)
+{
+        struct uart_pxa_port *sport = dev_get_drvdata(_dev);
+
+        if (sport && level == RESUME_ENABLE)
+                uart_resume_port(&serial_pxa_reg, &sport->port);
+
+        return 0;
+}
+
+static int serial_pxa_probe(struct device *_dev)
+{
+        struct platform_device *dev = to_platform_device(_dev);
+
+        serial_pxa_ports[dev->id].port.dev = _dev;
+        uart_add_one_port(&serial_pxa_reg, &serial_pxa_ports[dev->id].port);
+        dev_set_drvdata(_dev, &serial_pxa_ports[dev->id]);
+        return 0;
+}
+
+static int serial_pxa_remove(struct device *_dev)
+{
+        struct uart_pxa_port *sport = dev_get_drvdata(_dev);
+
+        dev_set_drvdata(_dev, NULL);
+
+        if (sport)
+                uart_remove_one_port(&serial_pxa_reg, &sport->port);
+
+        return 0;
+}
+
+static struct device_driver serial_pxa_driver = {
+        .name           = "pxa2xx-uart",
+        .bus            = &platform_bus_type,
+        .probe          = serial_pxa_probe,
+        .remove         = serial_pxa_remove,
+
+        .suspend        = serial_pxa_suspend,
+        .resume         = serial_pxa_resume,
+};
+
+int __init serial_pxa_init(void)
+{
+        int ret;
+
+        ret = uart_register_driver(&serial_pxa_reg);
+        if (ret != 0)
+                return ret;
+
+        ret = driver_register(&serial_pxa_driver);
+        if (ret != 0)
+                uart_unregister_driver(&serial_pxa_reg);
+
+        return ret;
+}
+
+void __exit serial_pxa_exit(void)
+{
+        driver_unregister(&serial_pxa_driver);
+        uart_unregister_driver(&serial_pxa_reg);
+}
+
+module_init(serial_pxa_init);
+module_exit(serial_pxa_exit);
+
+MODULE_LICENSE("GPL");
+