tty: move drivers/serial/ to drivers/tty/serial/

The serial drivers are really just tty drivers, so move them to
drivers/tty/ to make things a bit neater overall.

This is part of the tty/serial driver movement proceedure as proposed by
Arnd Bergmann and approved by everyone involved a number of months ago.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl>
Cc: Michael H. Warfield <mhw@wittsend.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

119 files changed, 0 insertions, 97162 deletions

diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c
deleted file mode 100644
index d89aa38c5cf..00000000000
--- a/drivers/serial/21285.c
+++ /dev/null
@@ -1,513 +0,0 @@
-/*
- * linux/drivers/serial/21285.c
- *
- * Driver for the serial port on the 21285 StrongArm-110 core logic chip.
- *
- * Based on drivers/char/serial.c
- */
-#include <linux/module.h>
-#include <linux/tty.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/device.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <asm/mach-types.h>
-#include <asm/hardware/dec21285.h>
-#include <mach/hardware.h>
-
-#define BAUD_BASE		(mem_fclk_21285/64)
-
-#define SERIAL_21285_NAME	"ttyFB"
-#define SERIAL_21285_MAJOR	204
-#define SERIAL_21285_MINOR	4
-
-#define RXSTAT_DUMMY_READ	0x80000000
-#define RXSTAT_FRAME		(1 << 0)
-#define RXSTAT_PARITY		(1 << 1)
-#define RXSTAT_OVERRUN		(1 << 2)
-#define RXSTAT_ANYERR		(RXSTAT_FRAME|RXSTAT_PARITY|RXSTAT_OVERRUN)
-
-#define H_UBRLCR_BREAK		(1 << 0)
-#define H_UBRLCR_PARENB		(1 << 1)
-#define H_UBRLCR_PAREVN		(1 << 2)
-#define H_UBRLCR_STOPB		(1 << 3)
-#define H_UBRLCR_FIFO		(1 << 4)
-
-static const char serial21285_name[] = "Footbridge UART";
-
-#define tx_enabled(port)	((port)->unused[0])
-#define rx_enabled(port)	((port)->unused[1])
-
-/*
- * The documented expression for selecting the divisor is:
- *  BAUD_BASE / baud - 1
- * However, typically BAUD_BASE is not divisible by baud, so
- * we want to select the divisor that gives us the minimum
- * error.  Therefore, we want:
- *  int(BAUD_BASE / baud - 0.5) ->
- *  int(BAUD_BASE / baud - (baud >> 1) / baud) ->
- *  int((BAUD_BASE - (baud >> 1)) / baud)
- */
-
-static void serial21285_stop_tx(struct uart_port *port)
-{
-	if (tx_enabled(port)) {
-		disable_irq_nosync(IRQ_CONTX);
-		tx_enabled(port) = 0;
-	}
-}
-
-static void serial21285_start_tx(struct uart_port *port)
-{
-	if (!tx_enabled(port)) {
-		enable_irq(IRQ_CONTX);
-		tx_enabled(port) = 1;
-	}
-}
-
-static void serial21285_stop_rx(struct uart_port *port)
-{
-	if (rx_enabled(port)) {
-		disable_irq_nosync(IRQ_CONRX);
-		rx_enabled(port) = 0;
-	}
-}
-
-static void serial21285_enable_ms(struct uart_port *port)
-{
-}
-
-static irqreturn_t serial21285_rx_chars(int irq, void *dev_id)
-{
-	struct uart_port *port = dev_id;
-	struct tty_struct *tty = port->state->port.tty;
-	unsigned int status, ch, flag, rxs, max_count = 256;
-
-	status = *CSR_UARTFLG;
-	while (!(status & 0x10) && max_count--) {
-		ch = *CSR_UARTDR;
-		flag = TTY_NORMAL;
-		port->icount.rx++;
-
-		rxs = *CSR_RXSTAT | RXSTAT_DUMMY_READ;
-		if (unlikely(rxs & RXSTAT_ANYERR)) {
-			if (rxs & RXSTAT_PARITY)
-				port->icount.parity++;
-			else if (rxs & RXSTAT_FRAME)
-				port->icount.frame++;
-			if (rxs & RXSTAT_OVERRUN)
-				port->icount.overrun++;
-
-			rxs &= port->read_status_mask;
-
-			if (rxs & RXSTAT_PARITY)
-				flag = TTY_PARITY;
-			else if (rxs & RXSTAT_FRAME)
-				flag = TTY_FRAME;
-		}
-
-		uart_insert_char(port, rxs, RXSTAT_OVERRUN, ch, flag);
-
-		status = *CSR_UARTFLG;
-	}
-	tty_flip_buffer_push(tty);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t serial21285_tx_chars(int irq, void *dev_id)
-{
-	struct uart_port *port = dev_id;
-	struct circ_buf *xmit = &port->state->xmit;
-	int count = 256;
-
-	if (port->x_char) {
-		*CSR_UARTDR = port->x_char;
-		port->icount.tx++;
-		port->x_char = 0;
-		goto out;
-	}
-	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		serial21285_stop_tx(port);
-		goto out;
-	}
-
-	do {
-		*CSR_UARTDR = xmit->buf[xmit->tail];
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		port->icount.tx++;
-		if (uart_circ_empty(xmit))
-			break;
-	} while (--count > 0 && !(*CSR_UARTFLG & 0x20));
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-
-	if (uart_circ_empty(xmit))
-		serial21285_stop_tx(port);
-
- out:
-	return IRQ_HANDLED;
-}
-
-static unsigned int serial21285_tx_empty(struct uart_port *port)
-{
-	return (*CSR_UARTFLG & 8) ? 0 : TIOCSER_TEMT;
-}
-
-/* no modem control lines */
-static uns