Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1291 insertions, 0 deletions

diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c
new file mode 100644
index 000000000..e12f1dc18
--- /dev/null
+++ b/drivers/tty/serial/serial_txx9.c
@@ -0,0 +1,1291 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Derived from many drivers using generic_serial interface,
+ * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
+ * (was in Linux/VR tree) by Jim Pick.
+ *
+ *  Copyright (C) 1999 Harald Koerfgen
+ *  Copyright (C) 2000 Jim Pick <jim@jimpick.com>
+ *  Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
+ *  Copyright (C) 2000-2002 Toshiba Corporation
+ *
+ *  Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
+ */
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/pci.h>
+#include <linux/serial_core.h>
+#include <linux/serial.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+
+#include <linux/io.h>
+
+#define PASS_LIMIT	256
+
+#if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
+/* "ttyS" is used for standard serial driver */
+#define TXX9_TTY_NAME "ttyTX"
+#define TXX9_TTY_MINOR_START	196
+#define TXX9_TTY_MAJOR	204
+#else
+/* acts like standard serial driver */
+#define TXX9_TTY_NAME "ttyS"
+#define TXX9_TTY_MINOR_START	64
+#define TXX9_TTY_MAJOR	TTY_MAJOR
+#endif
+
+/* flag aliases */
+#define UPF_TXX9_HAVE_CTS_LINE	UPF_BUGGY_UART
+#define UPF_TXX9_USE_SCLK	UPF_MAGIC_MULTIPLIER
+
+#ifdef CONFIG_PCI
+/* support for Toshiba TC86C001 SIO */
+#define ENABLE_SERIAL_TXX9_PCI
+#endif
+
+/*
+ * Number of serial ports
+ */
+#define UART_NR  CONFIG_SERIAL_TXX9_NR_UARTS
+
+#define TXX9_REGION_SIZE	0x24
+
+/* TXX9 Serial Registers */
+#define TXX9_SILCR	0x00
+#define TXX9_SIDICR	0x04
+#define TXX9_SIDISR	0x08
+#define TXX9_SICISR	0x0c
+#define TXX9_SIFCR	0x10
+#define TXX9_SIFLCR	0x14
+#define TXX9_SIBGR	0x18
+#define TXX9_SITFIFO	0x1c
+#define TXX9_SIRFIFO	0x20
+
+/* SILCR : Line Control */
+#define TXX9_SILCR_SCS_MASK	0x00000060
+#define TXX9_SILCR_SCS_IMCLK	0x00000000
+#define TXX9_SILCR_SCS_IMCLK_BG	0x00000020
+#define TXX9_SILCR_SCS_SCLK	0x00000040
+#define TXX9_SILCR_SCS_SCLK_BG	0x00000060
+#define TXX9_SILCR_UEPS	0x00000010
+#define TXX9_SILCR_UPEN	0x00000008
+#define TXX9_SILCR_USBL_MASK	0x00000004
+#define TXX9_SILCR_USBL_1BIT	0x00000000
+#define TXX9_SILCR_USBL_2BIT	0x00000004
+#define TXX9_SILCR_UMODE_MASK	0x00000003
+#define TXX9_SILCR_UMODE_8BIT	0x00000000
+#define TXX9_SILCR_UMODE_7BIT	0x00000001
+
+/* SIDICR : DMA/Int. Control */
+#define TXX9_SIDICR_TDE	0x00008000
+#define TXX9_SIDICR_RDE	0x00004000
+#define TXX9_SIDICR_TIE	0x00002000
+#define TXX9_SIDICR_RIE	0x00001000
+#define TXX9_SIDICR_SPIE	0x00000800
+#define TXX9_SIDICR_CTSAC	0x00000600
+#define TXX9_SIDICR_STIE_MASK	0x0000003f
+#define TXX9_SIDICR_STIE_OERS		0x00000020
+#define TXX9_SIDICR_STIE_CTSS		0x00000010
+#define TXX9_SIDICR_STIE_RBRKD	0x00000008
+#define TXX9_SIDICR_STIE_TRDY		0x00000004
+#define TXX9_SIDICR_STIE_TXALS	0x00000002
+#define TXX9_SIDICR_STIE_UBRKD	0x00000001
+
+/* SIDISR : DMA/Int. Status */
+#define TXX9_SIDISR_UBRK	0x00008000
+#define TXX9_SIDISR_UVALID	0x00004000
+#define TXX9_SIDISR_UFER	0x00002000
+#define TXX9_SIDISR_UPER	0x00001000
+#define TXX9_SIDISR_UOER	0x00000800
+#define TXX9_SIDISR_ERI	0x00000400
+#define TXX9_SIDISR_TOUT	0x00000200
+#define TXX9_SIDISR_TDIS	0x00000100
+#define TXX9_SIDISR_RDIS	0x00000080
+#define TXX9_SIDISR_STIS	0x00000040
+#define TXX9_SIDISR_RFDN_MASK	0x0000001f
+
+/* SICISR : Change Int. Status */
+#define TXX9_SICISR_OERS	0x00000020
+#define TXX9_SICISR_CTSS	0x00000010
+#define TXX9_SICISR_RBRKD	0x00000008
+#define TXX9_SICISR_TRDY	0x00000004
+#define TXX9_SICISR_TXALS	0x00000002
+#define TXX9_SICISR_UBRKD	0x00000001
+
+/* SIFCR : FIFO Control */
+#define TXX9_SIFCR_SWRST	0x00008000
+#define TXX9_SIFCR_RDIL_MASK	0x00000180
+#define TXX9_SIFCR_RDIL_1	0x00000000
+#define TXX9_SIFCR_RDIL_4	0x00000080
+#define TXX9_SIFCR_RDIL_8	0x00000100
+#define TXX9_SIFCR_RDIL_12	0x00000180
+#define TXX9_SIFCR_RDIL_MAX	0x00000180
+#define TXX9_SIFCR_TDIL_MASK	0x00000018
+#define TXX9_SIFCR_TDIL_1	0x00000000
+#define TXX9_SIFCR_TDIL_4	0x00000001
+#define TXX9_SIFCR_TDIL_8	0x00000010
+#define TXX9_SIFCR_TDIL_MAX	0x00000010
+#define TXX9_SIFCR_TFRST	0x00000004
+#define TXX9_SIFCR_RFRST	0x00000002
+#define TXX9_SIFCR_FRSTE	0x00000001
+#define TXX9_SIO_TX_FIFO	8
+#define TXX9_SIO_RX_FIFO	16
+
+/* SIFLCR : Flow Control */
+#define TXX9_SIFLCR_RCS	0x00001000
+#define TXX9_SIFLCR_TES	0x00000800
+#define TXX9_SIFLCR_RTSSC	0x00000200
+#define TXX9_SIFLCR_RSDE	0x00000100
+#define TXX9_SIFLCR_TSDE	0x00000080
+#define TXX9_SIFLCR_RTSTL_MASK	0x0000001e
+#define TXX9_SIFLCR_RTSTL_MAX	0x0000001e
+#define TXX9_SIFLCR_TBRK	0x00000001
+
+/* SIBGR : Baudrate Control */
+#define TXX9_SIBGR_BCLK_MASK	0x00000300
+#define TXX9_SIBGR_BCLK_T0	0x00000000
+#define TXX9_SIBGR_BCLK_T2	0x00000100
+#define TXX9_SIBGR_BCLK_T4	0x00000200
+#define TXX9_SIBGR_BCLK_T6	0x00000300
+#define TXX9_SIBGR_BRD_MASK	0x000000ff
+
+static inline unsigned int sio_in(struct uart_port *up, int offset)
+{
+	switch (up->iotype) {
+	default:
+		return __raw_readl(up->membase + offset);
+	case UPIO_PORT:
+		return inl(up->iobase + offset);
+	}
+}
+
+static inline void
+sio_out(struct uart_port *up, int offset, int value)
+{
+	switch (up->iotype) {
+	default:
+		__raw_writel(value, up->membase + offset);
+		break;
+	case UPIO_PORT:
+		outl(value, up->iobase + offset);
+		break;
+	}
+}
+
+static inline void
+sio_mask(struct uart_port *up, int offset, unsigned int value)
+{
+	sio_out(up, offset, sio_in(up, offset) & ~value);
+}
+static inline void
+sio_set(struct uart_port *up, int offset, unsigned int value)
+{
+	sio_out(up, offset, sio_in(up, offset) | value);
+}
+
+static inline void
+sio_quot_set(struct uart_port *up, int quot)
+{
+	quot >>= 1;
+	if (quot < 256)
+		sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
+	else if (quot < (256 << 2))
+		sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
+	else if (quot < (256 << 4))
+		sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
+	else if (quot < (256 << 6))
+		sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
+	else
+		sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
+}
+
+static void serial_txx9_stop_tx(struct uart_port *up)
+{
+	sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
+}
+
+static void serial_txx9_start_tx(struct uart_port *up)
+{
+	sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
+}
+
+static void serial_txx9_stop_rx(struct uart_port *up)
+{
+	up->read_status_mask &= ~TXX9_SIDISR_RDIS;
+}
+
+static void serial_txx9_initialize(struct uart_port *up)
+{
+	unsigned int tmout = 10000;
+
+	sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
+	/* TX4925 BUG WORKAROUND.  Accessing SIOC register
+	 * immediately after soft reset causes bus error. */
+	udelay(1);
+	while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
+		udelay(1);
+	/* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
+	sio_set(up, TXX9_SIFCR,
+		TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
+	/* initial settings */
+	sio_out(up, TXX9_SILCR,
+		TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
+		((up->flags & UPF_TXX9_USE_SCLK) ?
+		 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
+	sio_quot_set(up, uart_get_divisor(up, 9600));
+	sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
+	sio_out(up, TXX9_SIDICR, 0);
+}
+
+static inline void
+receive_chars(struct uart_port *up, unsigned int *status)
+{
+	unsigned char ch;
+	unsigned int disr = *status;
+	int max_count = 256;
+	char flag;
+	unsigned int next_ignore_status_mask;
+
+	do {
+		ch = sio_in(up, TXX9_SIRFIFO);
+		flag = TTY_NORMAL;
+		up->icount.rx++;
+
+		/* mask out RFDN_MASK bit added by previous overrun */
+		next_ignore_status_mask =
+			up->ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
+		if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
+				     TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
+			/*
+			 * For statistics only
+			 */
+			if (disr & TXX9_SIDISR_UBRK) {
+				disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
+				up->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))
+					goto ignore_char;
+			} else if (disr & TXX9_SIDISR_UPER)
+				up->icount.parity++;
+			else if (disr & TXX9_SIDISR_UFER)
+				up->icount.frame++;
+			if (disr & TXX9_SIDISR_UOER) {
+				up->icount.overrun++;
+				/*
+				 * The receiver read buffer still hold
+				 * a char which caused overrun.
+				 * Ignore next char by adding RFDN_MASK
+				 * to ignore_status_mask temporarily.
+				 */
+				next_ignore_status_mask |=
+					TXX9_SIDISR_RFDN_MASK;
+			}
+
+			/*
+			 * Mask off conditions which should be ingored.
+			 */
+			disr &= up->read_status_mask;
+
+			if (disr & TXX9_SIDISR_UBRK) {
+				flag = TTY_BREAK;
+			} else if (disr & TXX9_SIDISR_UPER)
+				flag = TTY_PARITY;
+			else if (disr & TXX9_SIDISR_UFER)
+				flag = TTY_FRAME;
+		}
+		if (uart_handle_sysrq_char(up, ch))
+			goto ignore_char;
+
+		uart_insert_char(up, disr, TXX9_SIDISR_UOER, ch, flag);
+
+	ignore_char:
+		up->ignore_status_mask = next_ignore_status_mask;
+		disr = sio_in(up, TXX9_SIDISR);
+	} while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
+
+	tty_flip_buffer_push(&up->state->port);
+
+	*status = disr;
+}
+
+static inline void transmit_chars(struct uart_port *up)
+{
+	struct circ_buf *xmit = &up->state->xmit;
+	int count;
+
+	if (up->x_char) {
+		sio_out(up, TXX9_SITFIFO, up->x_char);
+		up->icount.tx++;
+		up->x_char = 0;
+		return;
+	}
+	if (uart_circ_empty(xmit) || uart_tx_stopped(up)) {
+		serial_txx9_stop_tx(up);
+		return;
+	}
+
+	count = TXX9_SIO_TX_FIFO;
+	do {
+		sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
+		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+		up->icount.tx++;
+		if (uart_circ_empty(xmit))
+			break;
+	} while (--count > 0);
+
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(up);
+
+	if (uart_circ_empty(xmit))
+		serial_txx9_stop_tx(up);
+}
+
+static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
+{
+	int pass_counter = 0;
+	struct uart_port *up = dev_id;
+	unsigned int status;
+
+	while (1) {
+		spin_lock(&up->lock);
+		status = sio_in(up, TXX9_SIDISR);
+		if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
+			status &= ~TXX9_SIDISR_TDIS;
+		if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
+				TXX9_SIDISR_TOUT))) {
+			spin_unlock(&up->lock);
+			break;
+		}
+
+		if (status & TXX9_SIDISR_RDIS)
+			receive_chars(up, &status);
+		if (status & TXX9_SIDISR_TDIS)
+			transmit_chars(up);
+		/* Clear TX/RX Int. Status */
+		sio_mask(up, TXX9_SIDISR,
+			 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
+			 TXX9_SIDISR_TOUT);
+		spin_unlock(&up->lock);
+
+		if (pass_counter++ > PASS_LIMIT)
+			break;
+	}
+
+	return pass_counter ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static unsigned int serial_txx9_tx_empty(struct uart_port *up)
+{
+	unsigned long flags;
+	unsigned int ret;
+
+	spin_lock_irqsave(&up->lock, flags);
+	ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
+	spin_unlock_irqrestore(&up->lock, flags);
+
+	return ret;
+}
+
+static unsigned int serial_txx9_get_mctrl(struct uart_port *up)
+{
+	unsigned int ret;
+
+	/* no modem control lines */
+	ret = TIOCM_CAR | TIOCM_DSR;
+	ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
+	ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
+
+	return ret;
+}
+
+static void serial_txx9_set_mctrl(struct uart_port *up, unsigned int mctrl)
+{
+
+	if (mctrl & TIOCM_RTS)
+		sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
+	else
+		sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
+}
+
+static void serial_txx9_break_ctl(struct uart_port *up, int break_state)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&up->lock, flags);
+	if (break_state == -1)
+		sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
+	else
+		sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
+	spin_unlock_irqrestore(&up->lock, flags);
+}
+
+#if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
+/*
+ *	Wait for transmitter & holding register to empty
+ */
+static void wait_for_xmitr(struct uart_port *up)
+{
+	unsigned int tmout = 10000;
+
+	/* Wait up to 10ms for the character(s) to be sent. */
+	while (--tmout &&
+	       !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
+		udelay(1);
+
+	/* Wait up to 1s for flow control if necessary */
+	if (up->flags & UPF_CONS_FLOW) {
+		tmout = 1000000;
+		while (--tmout &&
+		       (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
+			udelay(1);
+	}
+}
+#endif
+
+#ifdef CONFIG_CONSOLE_POLL
+/*
+ * Console polling routines for writing and reading from the uart while
+ * in an interrupt or debug context.
+ */
+
+static int serial_txx9_get_poll_char(struct uart_port *up)
+{
+	unsigned int ier;
+	unsigned char c;
+
+	/*
+	 *	First save the IER then disable the interrupts
+	 */
+	ier = sio_in(up, TXX9_SIDICR);
+	sio_out(up, TXX9_SIDICR, 0);
+
+	while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
+		;
+
+	c = sio_in(up, TXX9_SIRFIFO);
+
+	/*
+	 *	Finally, clear RX interrupt status
+	 *	and restore the IER
+	 */
+	sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
+	sio_out(up, TXX9_SIDICR, ier);
+	return c;
+}
+
+
+static void serial_txx9_put_poll_char(struct uart_port *up, unsigned char c)
+{
+	unsigned int ier;
+
+	/*
+	 *	First save the IER then disable the interrupts
+	 */
+	ier = sio_in(up, TXX9_SIDICR);
+	sio_out(up, TXX9_SIDICR, 0);
+
+	wait_for_xmitr(up);
+	/*
+	 *	Send the character out.
+	 */
+	sio_out(up, TXX9_SITFIFO, c);
+
+	/*
+	 *	Finally, wait for transmitter to become empty
+	 *	and restore the IER
+	 */
+	wait_for_xmitr(up);
+	sio_out(up, TXX9_SIDICR, ier);
+}
+
+#endif /* CONFIG_CONSOLE_POLL */
+
+static int serial_txx9_startup(struct uart_port *up)
+{
+	unsigned long flags;
+	int retval;
+
+	/*
+	 * Clear the FIFO buffers and disable them.
+	 * (they will be reenabled in set_termios())
+	 */
+	sio_set(up, TXX9_SIFCR,
+		TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
+	/* clear reset */
+	sio_mask(up, TXX9_SIFCR,
+		 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
+	sio_out(up, TXX9_SIDICR, 0);
+
+	/*
+	 * Clear the interrupt registers.
+	 */
+	sio_out(up, TXX9_SIDISR, 0);
+
+	retval = request_irq(up->irq, serial_txx9_interrupt,
+			     IRQF_SHARED, "serial_txx9", up);
+	if (retval)
+		return retval;
+
+	/*
+	 * Now, initialize the UART
+	 */
+	spin_lock_irqsave(&up->lock, flags);
+	serial_txx9_set_mctrl(up, up->mctrl);
+	spin_unlock_irqrestore(&up->lock, flags);
+
+	/* Enable RX/TX */
+	sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
+
+	/*
+	 * Finally, enable interrupts.
+	 */
+	sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
+
+	return 0;
+}
+
+static void serial_txx9_shutdown(struct uart_port *up)
+{
+	unsigned long flags;
+
+	/*
+	 * Disable interrupts from this port
+	 */
+	sio_out(up, TXX9_SIDICR, 0);	/* disable all intrs */
+
+	spin_lock_irqsave(&up->lock, flags);
+	serial_txx9_set_mctrl(up, up->mctrl);
+	spin_unlock_irqrestore(&up->lock, flags);
+
+	/*
+	 * Disable break condition
+	 */
+	sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
+
+#ifdef CONFIG_SERIAL_TXX9_CONSOLE
+	if (up->cons && up->line == up->cons->index) {
+		free_irq(up->irq, up);
+		return;
+	}
+#endif
+	/* reset FIFOs */
+	sio_set(up, TXX9_SIFCR,
+		TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
+	/* clear reset */
+	sio_mask(up, TXX9_SIFCR,
+		 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
+
+	/* Disable RX/TX */
+	sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
+
+	free_irq(up->irq, up);
+}
+
+static void
+serial_txx9_set_termios(struct uart_port *up, struct ktermios *termios,
+			const struct ktermios *old)
+{
+	unsigned int cval, fcr = 0;
+	unsigned long flags;
+	unsigned int baud, quot;
+
+	/*
+	 * We don't support modem control lines.
+	 */
+	termios->c_cflag &= ~(HUPCL | CMSPAR);
+	termios->c_cflag |= CLOCAL;
+
+	cval = sio_in(up, TXX9_SILCR);
+	/* byte size and parity */
+	cval &= ~TXX9_SILCR_UMODE_MASK;
+	switch (termios->c_cflag & CSIZE) {
+	case CS7:
+		cval |= TXX9_SILCR_UMODE_7BIT;
+		break;
+	default:
+	case CS5:	/* not supported */
+	case CS6:	/* not supported */
+	case CS8:
+		cval |= TXX9_SILCR_UMODE_8BIT;
+		termios->c_cflag &= ~CSIZE;
+		termios->c_cflag |= CS8;
+		break;
+	}
+
+	cval &= ~TXX9_SILCR_USBL_MASK;
+	if (termios->c_cflag & CSTOPB)
+		cval |= TXX9_SILCR_USBL_2BIT;
+	else
+		cval |= TXX9_SILCR_USBL_1BIT;
+	cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
+	if (termios->c_cflag & PARENB)
+		cval |= TXX9_SILCR_UPEN;
+	if (!(termios->c_cflag & PARODD))
+		cval |= TXX9_SILCR_UEPS;
+
+	/*
+	 * Ask the core to calculate the divisor for us.
+	 */
+	baud = uart_get_baud_rate(up, termios, old, 0, up->uartclk/16/2);
+	quot = uart_get_divisor(up, baud);
+
+	/* Set up FIFOs */
+	/* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
+	fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
+
+	/*
+	 * Ok, we're now changing the port state.  Do it with
+	 * interrupts disabled.
+	 */
+	spin_lock_irqsave(&up->lock, flags);
+
+	/*
+	 * Update the per-port timeout.
+	 */
+	uart_update_timeout(up, termios->c_cflag, baud);
+
+	up->read_status_mask = TXX9_SIDISR_UOER |
+		TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
+	if (termios->c_iflag & INPCK)
+		up->read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
+	if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
+		up->read_status_mask |= TXX9_SIDISR_UBRK;
+
+	/*
+	 * Characteres to ignore
+	 */
+	up->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		up->ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
+	if (termios->c_iflag & IGNBRK) {
+		up->ignore_status_mask |= TXX9_SIDISR_UBRK;
+		/*
+		 * If we're ignoring parity and break indicators,
+		 * ignore overruns too (for real raw support).
+		 */
+		if (termios->c_iflag & IGNPAR)
+			up->ignore_status_mask |= TXX9_SIDISR_UOER;
+	}
+
+	/*
+	 * ignore all characters if CREAD is not set
+	 */
+	if ((termios->c_cflag & CREAD) == 0)
+		up->ignore_status_mask |= TXX9_SIDISR_RDIS;
+
+	/* CTS flow control flag */
+	if ((termios->c_cflag & CRTSCTS) &&
+	    (up->flags & UPF_TXX9_HAVE_CTS_LINE)) {
+		sio_set(up, TXX9_SIFLCR,
+			TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
+	} else {
+		sio_mask(up, TXX9_SIFLCR,
+			 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
+	}
+
+	sio_out(up, TXX9_SILCR, cval);
+	sio_quot_set(up, quot);
+	sio_out(up, TXX9_SIFCR, fcr);
+
+	serial_txx9_set_mctrl(up, up->mctrl);
+	spin_unlock_irqrestore(&up->lock, flags);
+}
+
+static void
+serial_txx9_pm(struct uart_port *port, unsigned int state,
+	      unsigned int oldstate)
+{
+	/*
+	 * If oldstate was -1 this is called from
+	 * uart_configure_port().  In this case do not initialize the
+	 * port now, because the port was already initialized (for
+	 * non-console port) or should not be initialized here (for
+	 * console port).  If we initialized the port here we lose
+	 * serial console settings.
+	 */
+	if (state == 0 && oldstate != -1)
+		serial_txx9_initialize(port);
+}
+
+static int serial_txx9_request_resource(struct uart_port *up)
+{
+	unsigned int size = TXX9_REGION_SIZE;
+	int ret = 0;
+
+	switch (up->iotype) {
+	default:
+		if (!up->mapbase)
+			break;
+
+		if (!request_mem_region(up->mapbase, size, "serial_txx9")) {
+			ret = -EBUSY;
+			break;
+		}
+
+		if (up->flags & UPF_IOREMAP) {
+			up->membase = ioremap(up->mapbase, size);
+			if (!up->membase) {
+				release_mem_region(up->mapbase, size);
+				ret = -ENOMEM;
+			}
+		}
+		break;
+
+	case UPIO_PORT:
+		if (!request_region(up->iobase, size, "serial_txx9"))
+			ret = -EBUSY;
+		break;
+	}
+	return ret;
+}
+
+static void serial_txx9_release_resource(struct uart_port *up)
+{
+	unsigned int size = TXX9_REGION_SIZE;
+
+	switch (up->iotype) {
+	default:
+		if (!up->mapbase)
+			break;
+
+		if (up->flags & UPF_IOREMAP) {
+			iounmap(up->membase);
+			up->membase = NULL;
+		}
+
+		release_mem_region(up->mapbase, size);
+		break;
+
+	case UPIO_PORT:
+		release_region(up->iobase, size);
+		break;
+	}
+}
+
+static void serial_txx9_release_port(struct uart_port *up)
+{
+	serial_txx9_release_resource(up);
+}
+
+static int serial_txx9_request_port(struct uart_port *up)
+{
+	return serial_txx9_request_resource(up);
+}
+
+static void serial_txx9_config_port(struct uart_port *up, int uflags)
+{
+	int ret;
+
+	/*
+	 * Find the region that we can probe for.  This in turn
+	 * tells us whether we can probe for the type of port.
+	 */
+	ret = serial_txx9_request_resource(up);
+	if (ret < 0)
+		return;
+	up->type = PORT_TXX9;
+	up->fifosize = TXX9_SIO_TX_FIFO;
+
+#ifdef CONFIG_SERIAL_TXX9_CONSOLE
+	if (up->line == up->cons->index)
+		return;
+#endif
+	serial_txx9_initialize(up);
+}
+
+static const char *
+serial_txx9_type(struct uart_port *port)
+{
+	return "txx9";
+}
+
+static const struct uart_ops serial_txx9_pops = {
+	.tx_empty	= serial_txx9_tx_empty,
+	.set_mctrl	= serial_txx9_set_mctrl,
+	.get_mctrl	= serial_txx9_get_mctrl,
+	.stop_tx	= serial_txx9_stop_tx,
+	.start_tx	= serial_txx9_start_tx,
+	.stop_rx	= serial_txx9_stop_rx,
+	.break_ctl	= serial_txx9_break_ctl,
+	.startup	= serial_txx9_startup,
+	.shutdown	= serial_txx9_shutdown,
+	.set_termios	= serial_txx9_set_termios,
+	.pm		= serial_txx9_pm,
+	.type		= serial_txx9_type,
+	.release_port	= serial_txx9_release_port,
+	.request_port	= serial_txx9_request_port,
+	.config_port	= serial_txx9_config_port,
+#ifdef CONFIG_CONSOLE_POLL
+	.poll_get_char	= serial_txx9_get_poll_char,
+	.poll_put_char	= serial_txx9_put_poll_char,
+#endif
+};
+
+static struct uart_port serial_txx9_ports[UART_NR];
+
+static void __init serial_txx9_register_ports(struct uart_driver *drv,
+					      struct device *dev)
+{
+	int i;
+
+	for (i = 0; i < UART_NR; i++) {
+		struct uart_port *up = &serial_txx9_ports[i];
+
+		up->line = i;
+		up->ops = &serial_txx9_pops;
+		up->dev = dev;
+		if (up->iobase || up->mapbase)
+			uart_add_one_port(drv, up);
+	}
+}
+
+#ifdef CONFIG_SERIAL_TXX9_CONSOLE
+
+static void serial_txx9_console_putchar(struct uart_port *up, unsigned char ch)
+{
+	wait_for_xmitr(up);
+	sio_out(up, TXX9_SITFIFO, ch);
+}
+
+/*
+ *	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_txx9_console_write(struct console *co, const char *s, unsigned int count)
+{
+	struct uart_port *up = &serial_txx9_ports[co->index];
+	unsigned int ier, flcr;
+
+	/*
+	 *	First save the UER then disable the interrupts
+	 */
+	ier = sio_in(up, TXX9_SIDICR);
+	sio_out(up, TXX9_SIDICR, 0);
+	/*
+	 *	Disable flow-control if enabled (and unnecessary)
+	 */
+	flcr = sio_in(up, TXX9_SIFLCR);
+	if (!(up->flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
+		sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
+
+	uart_console_write(up, s, count, serial_txx9_console_putchar);
+
+	/*
+	 *	Finally, wait for transmitter to become empty
+	 *	and restore the IER
+	 */
+	wait_for_xmitr(up);
+	sio_out(up, TXX9_SIFLCR, flcr);
+	sio_out(up, TXX9_SIDICR, ier);
+}
+
+static int __init serial_txx9_console_setup(struct console *co, char *options)
+{
+	struct uart_port *up;
+	int baud = 9600;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	if (co->index >= UART_NR)
+		co->index = 0;
+	up = &serial_txx9_ports[co->index];
+	if (!up->ops)
+		return -ENODEV;
+
+	serial_txx9_initialize(up);
+
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+	return uart_set_options(up, co, baud, parity, bits, flow);
+}
+
+static struct uart_driver serial_txx9_reg;
+static struct console serial_txx9_console = {
+	.name		= TXX9_TTY_NAME,
+	.write		= serial_txx9_console_write,
+	.device		= uart_console_device,
+	.setup		= serial_txx9_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+	.data		= &serial_txx9_reg,
+};
+
+static int __init serial_txx9_console_init(void)
+{
+	register_console(&serial_txx9_console);
+	return 0;
+}
+console_initcall(serial_txx9_console_init);
+
+#define SERIAL_TXX9_CONSOLE	&serial_txx9_console
+#else
+#define SERIAL_TXX9_CONSOLE	NULL
+#endif
+
+static struct uart_driver serial_txx9_reg = {
+	.owner			= THIS_MODULE,
+	.driver_name		= "serial_txx9",
+	.dev_name		= TXX9_TTY_NAME,
+	.major			= TXX9_TTY_MAJOR,
+	.minor			= TXX9_TTY_MINOR_START,
+	.nr			= UART_NR,
+	.cons			= SERIAL_TXX9_CONSOLE,
+};
+
+int __init early_serial_txx9_setup(struct uart_port *port)
+{
+	if (port->line >= ARRAY_SIZE(serial_txx9_ports))
+		return -ENODEV;
+
+	serial_txx9_ports[port->line] = *port;
+	serial_txx9_ports[port->line].ops = &serial_txx9_pops;
+	serial_txx9_ports[port->line].flags |=
+		UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
+	return 0;
+}
+
+static DEFINE_MUTEX(serial_txx9_mutex);
+
+/**
+ *	serial_txx9_register_port - register a serial port
+ *	@port: serial port template
+ *
+ *	Configure the serial port specified by the request.
+ *
+ *	The port is then probed and if necessary the IRQ is autodetected
+ *	If this fails an error is returned.
+ *
+ *	On success the port is ready to use and the line number is returned.
+ */
+static int serial_txx9_register_port(struct uart_port *port)
+{
+	int i;
+	struct uart_port *uart;
+	int ret = -ENOSPC;
+
+	mutex_lock(&serial_txx9_mutex);
+	for (i = 0; i < UART_NR; i++) {
+		uart = &serial_txx9_ports[i];
+		if (uart_match_port(uart, port)) {
+			uart_remove_one_port(&serial_txx9_reg, uart);
+			break;
+		}
+	}
+	if (i == UART_NR) {
+		/* Find unused port */
+		for (i = 0; i < UART_NR; i++) {
+			uart = &serial_txx9_ports[i];
+			if (!(uart->iobase || uart->mapbase))
+				break;
+		}
+	}
+	if (i < UART_NR) {
+		uart->iobase = port->iobase;
+		uart->membase = port->membase;
+		uart->irq      = port->irq;
+		uart->uartclk  = port->uartclk;
+		uart->iotype   = port->iotype;
+		uart->flags    = port->flags
+			| UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
+		uart->mapbase  = port->mapbase;
+		if (port->dev)
+			uart->dev = port->dev;
+		ret = uart_add_one_port(&serial_txx9_reg, uart);
+		if (ret == 0)
+			ret = uart->line;
+	}
+	mutex_unlock(&serial_txx9_mutex);
+	return ret;
+}
+
+/**
+ *	serial_txx9_unregister_port - remove a txx9 serial port at runtime
+ *	@line: serial line number
+ *
+ *	Remove one serial port.  This may not be called from interrupt
+ *	context.  We hand the port back to the our control.
+ */
+static void serial_txx9_unregister_port(int line)
+{
+	struct uart_port *uart = &serial_txx9_ports[line];
+
+	mutex_lock(&serial_txx9_mutex);
+	uart_remove_one_port(&serial_txx9_reg, uart);
+	uart->flags = 0;
+	uart->type = PORT_UNKNOWN;
+	uart->iobase = 0;
+	uart->mapbase = 0;
+	uart->membase = NULL;
+	uart->dev = NULL;
+	mutex_unlock(&serial_txx9_mutex);
+}
+
+/*
+ * Register a set of serial devices attached to a platform device.
+ */
+static int serial_txx9_probe(struct platform_device *dev)
+{
+	struct uart_port *p = dev_get_platdata(&dev->dev);
+	struct uart_port port;
+	int ret, i;
+
+	memset(&port, 0, sizeof(struct uart_port));
+	for (i = 0; p && p->uartclk != 0; p++, i++) {
+		port.iobase	= p->iobase;
+		port.membase	= p->membase;
+		port.irq	= p->irq;
+		port.uartclk	= p->uartclk;
+		port.iotype	= p->iotype;
+		port.flags	= p->flags;
+		port.mapbase	= p->mapbase;
+		port.dev	= &dev->dev;
+		port.has_sysrq	= IS_ENABLED(CONFIG_SERIAL_TXX9_CONSOLE);
+		ret = serial_txx9_register_port(&port);
+		if (ret < 0) {
+			dev_err(&dev->dev, "unable to register port at index %d "
+				"(IO%lx MEM%llx IRQ%d): %d\n", i,
+				p->iobase, (unsigned long long)p->mapbase,
+				p->irq, ret);
+		}
+	}
+	return 0;
+}
+
+/*
+ * Remove serial ports registered against a platform device.
+ */
+static int serial_txx9_remove(struct platform_device *dev)
+{
+	int i;
+
+	for (i = 0; i < UART_NR; i++) {
+		struct uart_port *up = &serial_txx9_ports[i];
+
+		if (up->dev == &dev->dev)
+			serial_txx9_unregister_port(i);
+	}
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
+{
+	int i;
+
+	for (i = 0; i < UART_NR; i++) {
+		struct uart_port *up = &serial_txx9_ports[i];
+
+		if (up->type != PORT_UNKNOWN && up->dev == &dev->dev)
+			uart_suspend_port(&serial_txx9_reg, up);
+	}
+
+	return 0;
+}
+
+static int serial_txx9_resume(struct platform_device *dev)
+{
+	int i;
+
+	for (i = 0; i < UART_NR; i++) {
+		struct uart_port *up = &serial_txx9_ports[i];
+
+		if (up->type != PORT_UNKNOWN && up->dev == &dev->dev)
+			uart_resume_port(&serial_txx9_reg, up);
+	}
+
+	return 0;
+}
+#endif
+
+static struct platform_driver serial_txx9_plat_driver = {
+	.probe		= serial_txx9_probe,
+	.remove		= serial_txx9_remove,
+#ifdef CONFIG_PM
+	.suspend	= serial_txx9_suspend,
+	.resume		= serial_txx9_resume,
+#endif
+	.driver		= {
+		.name	= "serial_txx9",
+	},
+};
+
+#ifdef ENABLE_SERIAL_TXX9_PCI
+/*
+ * Probe one serial board.  Unfortunately, there is no rhyme nor reason
+ * to the arrangement of serial ports on a PCI card.
+ */
+static int
+pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
+{
+	struct uart_port port;
+	int line;
+	int rc;
+
+	rc = pci_enable_device(dev);
+	if (rc)
+		return rc;
+
+	memset(&port, 0, sizeof(port));
+	port.ops = &serial_txx9_pops;
+	port.flags |= UPF_TXX9_HAVE_CTS_LINE;
+	port.uartclk = 66670000;
+	port.irq = dev->irq;
+	port.iotype = UPIO_PORT;
+	port.iobase = pci_resource_start(dev, 1);
+	port.dev = &dev->dev;
+	line = serial_txx9_register_port(&port);
+	if (line < 0) {
+		printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
+		pci_disable_device(dev);
+		return line;
+	}
+	pci_set_drvdata(dev, &serial_txx9_ports[line]);
+
+	return 0;
+}
+
+static void pciserial_txx9_remove_one(struct pci_dev *dev)
+{
+	struct uart_port *up = pci_get_drvdata(dev);
+
+	if (up) {
+		serial_txx9_unregister_port(up->line);
+		pci_disable_device(dev);
+	}
+}
+
+#ifdef CONFIG_PM
+static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
+{
+	struct uart_port *up = pci_get_drvdata(dev);
+
+	if (up)
+		uart_suspend_port(&serial_txx9_reg, up);
+	pci_save_state(dev);
+	pci_set_power_state(dev, pci_choose_state(dev, state));
+	return 0;
+}
+
+static int pciserial_txx9_resume_one(struct pci_dev *dev)
+{
+	struct uart_port *up = pci_get_drvdata(dev);
+
+	pci_set_power_state(dev, PCI_D0);
+	pci_restore_state(dev);
+	if (up)
+		uart_resume_port(&serial_txx9_reg, up);
+	return 0;
+}
+#endif
+
+static const struct pci_device_id serial_txx9_pci_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
+	{ 0, }
+};
+
+static struct pci_driver serial_txx9_pci_driver = {
+	.name		= "serial_txx9",
+	.probe		= pciserial_txx9_init_one,
+	.remove		= pciserial_txx9_remove_one,
+#ifdef CONFIG_PM
+	.suspend	= pciserial_txx9_suspend_one,
+	.resume		= pciserial_txx9_resume_one,
+#endif
+	.id_table	= serial_txx9_pci_tbl,
+};
+
+MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
+#endif /* ENABLE_SERIAL_TXX9_PCI */
+
+static struct platform_device *serial_txx9_plat_devs;
+
+static int __init serial_txx9_init(void)
+{
+	int ret;
+
+	ret = uart_register_driver(&serial_txx9_reg);
+	if (ret)
+		goto out;
+
+	serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
+	if (!serial_txx9_plat_devs) {
+		ret = -ENOMEM;
+		goto unreg_uart_drv;
+	}
+
+	ret = platform_device_add(serial_txx9_plat_devs);
+	if (ret)
+		goto put_dev;
+
+	serial_txx9_register_ports(&serial_txx9_reg,
+				   &serial_txx9_plat_devs->dev);
+
+	ret = platform_driver_register(&serial_txx9_plat_driver);
+	if (ret)
+		goto del_dev;
+
+#ifdef ENABLE_SERIAL_TXX9_PCI
+	ret = pci_register_driver(&serial_txx9_pci_driver);
+	if (ret) {
+		platform_driver_unregister(&serial_txx9_plat_driver);
+	}
+#endif
+	if (ret == 0)
+		goto out;
+
+ del_dev:
+	platform_device_del(serial_txx9_plat_devs);
+ put_dev:
+	platform_device_put(serial_txx9_plat_devs);
+ unreg_uart_drv:
+	uart_unregister_driver(&serial_txx9_reg);
+ out:
+	return ret;
+}
+
+static void __exit serial_txx9_exit(void)
+{
+	int i;
+
+#ifdef ENABLE_SERIAL_TXX9_PCI
+	pci_unregister_driver(&serial_txx9_pci_driver);
+#endif
+	platform_driver_unregister(&serial_txx9_plat_driver);
+	platform_device_unregister(serial_txx9_plat_devs);
+	for (i = 0; i < UART_NR; i++) {
+		struct uart_port *up = &serial_txx9_ports[i];
+		if (up->iobase || up->mapbase)
+			uart_remove_one_port(&serial_txx9_reg, up);
+	}
+
+	uart_unregister_driver(&serial_txx9_reg);
+}
+
+module_init(serial_txx9_init);
+module_exit(serial_txx9_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("TX39/49 serial driver");
+
+MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);