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>

1 files changed, 0 insertions, 661 deletions

diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c
deleted file mode 100644
index c9014868297..00000000000
--- a/drivers/serial/sunhv.c
+++ /dev/null
@@ -1,661 +0,0 @@
-/* sunhv.c: Serial driver for SUN4V hypervisor console.
- *
- * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/major.h>
-#include <linux/circ_buf.h>
-#include <linux/serial.h>
-#include <linux/sysrq.h>
-#include <linux/console.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/of_device.h>
-
-#include <asm/hypervisor.h>
-#include <asm/spitfire.h>
-#include <asm/prom.h>
-#include <asm/irq.h>
-
-#if defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/serial_core.h>
-
-#include "suncore.h"
-
-#define CON_BREAK	((long)-1)
-#define CON_HUP		((long)-2)
-
-#define IGNORE_BREAK	0x1
-#define IGNORE_ALL	0x2
-
-static char *con_write_page;
-static char *con_read_page;
-
-static int hung_up = 0;
-
-static void transmit_chars_putchar(struct uart_port *port, struct circ_buf *xmit)
-{
-	while (!uart_circ_empty(xmit)) {
-		long status = sun4v_con_putchar(xmit->buf[xmit->tail]);
-
-		if (status != HV_EOK)
-			break;
-
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		port->icount.tx++;
-	}
-}
-
-static void transmit_chars_write(struct uart_port *port, struct circ_buf *xmit)
-{
-	while (!uart_circ_empty(xmit)) {
-		unsigned long ra = __pa(xmit->buf + xmit->tail);
-		unsigned long len, status, sent;
-
-		len = CIRC_CNT_TO_END(xmit->head, xmit->tail,
-				      UART_XMIT_SIZE);
-		status = sun4v_con_write(ra, len, &sent);
-		if (status != HV_EOK)
-			break;
-		xmit->tail = (xmit->tail + sent) & (UART_XMIT_SIZE - 1);
-		port->icount.tx += sent;
-	}
-}
-
-static int receive_chars_getchar(struct uart_port *port, struct tty_struct *tty)
-{
-	int saw_console_brk = 0;
-	int limit = 10000;
-
-	while (limit-- > 0) {
-		long status;
-		long c = sun4v_con_getchar(&status);
-
-		if (status == HV_EWOULDBLOCK)
-			break;
-
-		if (c == CON_BREAK) {
-			if (uart_handle_break(port))
-				continue;
-			saw_console_brk = 1;
-			c = 0;
-		}
-
-		if (c == CON_HUP) {
-			hung_up = 1;
-			uart_handle_dcd_change(port, 0);
-		} else if (hung_up) {
-			hung_up = 0;
-			uart_handle_dcd_change(port, 1);
-		}
-
-		if (tty == NULL) {
-			uart_handle_sysrq_char(port, c);
-			continue;
-		}
-
-		port->icount.rx++;
-
-		if (uart_handle_sysrq_char(port, c))
-			continue;
-
-		tty_insert_flip_char(tty, c, TTY_NORMAL);
-	}
-
-	return saw_console_brk;
-}
-
-static int receive_chars_read(struct uart_port *port, struct tty_struct *tty)
-{
-	int saw_console_brk = 0;
-	int limit = 10000;
-
-	while (limit-- > 0) {
-		unsigned long ra = __pa(con_read_page);
-		unsigned long bytes_read, i;
-		long stat = sun4v_con_read(ra, PAGE_SIZE, &bytes_read);
-
-		if (stat != HV_EOK) {
-			bytes_read = 0;
-
-			if (stat == CON_BREAK) {
-				if (uart_handle_break(port))
-					continue;
-				saw_console_brk = 1;
-				*con_read_page = 0;
-				bytes_read = 1;
-			} else if (stat == CON_HUP) {
-				hung_up = 1;
-				uart_handle_dcd_change(port, 0);
-				continue;
-			} else {
-				/* HV_EWOULDBLOCK, etc.  */
-				break;
-			}
-		}
-
-		if (hung_up) {
-			hung_up = 0;
-			uart_handle_dcd_change(port, 1);
-		}
-
-		for (i = 0; i < bytes_read; i++)
-			uart_handle_sysrq_char(port, con_read_page[i]);
-
-		if (tty == NULL)
-			continue;
-
-		port->icount.rx += bytes_read;
-
-		tty_insert_flip_string(tty, con_read_page, bytes_read);
-	}
-
-	return saw_console_brk;
-}
-
-struct sunhv_ops {
-	void (*transmit_chars)(struct uart_port *port, struct circ_buf *xmit);
-	int (*receive_chars)(struct uart_port *port, struct tty_struct *tty);
-};
-
-static struct sunhv_ops bychar_ops = {
-	.transmit_chars = transmit_chars_putchar,
-	.receive_chars = receive_chars_getchar,
-};
-
-static struct sunhv_ops bywrite_ops = {
-	.transmit_chars = transmit_chars_write,
-	.receive_chars = receive_chars_read,
-};
-
-static struct sunhv_ops *sunhv_ops = &bychar_ops;
-
-static struct tty_struct *receive_chars(struct uart_port *port)
-{
-	struct tty_struct *tty = NULL;
-
-	if (port->state != NULL)		/* Unopened serial console */
-		tty = port->state->port.tty;
-
-	if (sunhv_ops->receive_chars(port, tty))
-		sun_do_break();
-
-	return tty;
-}
-
-static void transmit_chars(struct uart_port *port)
-{
-	struct circ_buf *xmit;
-
-	if (!port->state)
-		return;
-
-	xmit = &port->state->xmit;
-	if (uart_circ_empty(xmit) || uart_tx_stopped(port))
-		return;
-
-	sunhv_ops->transmit_chars(port, xmit);
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-}
-
-static irqreturn_t sunhv_interrupt(int irq, void *dev_id)
-{
-	struct uart_port *port = dev_id;
-	struct tty_struct *tty;
-	unsigned long flags;
-
-	spin_lock_irqsave(&port->lock, flags);
-	tty = receive_chars(port);
-	transmit_chars(port);
-	spin_unlock_irqrestore(&port->lock, flags);
-
-	if (tty)
-		tty_flip_buffer_push(tty);
-
-	return IRQ_HANDLED;
-}
-
-/* port->lock is not held.  */
-static unsigned int sunhv_tx_empty(struct uart_port *port)
-{
-	/* Transmitter is always empty for us.  If the circ buffer
-	 * is non-empty or there is an x_char pending, our caller
-	 * will do the right thing and ignore what we return here.
-	 */
-	return TIOCSER_TEMT;
-}
-
-/* port->lock held by caller.  */
-static void sunhv_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-	return;
-}
-
-/* port->lock is held by caller and interrupts are disabled.  */
-static unsigned int sunhv_get_mctrl(struct uart_port *port)
-{
-	return TIOCM_DSR | TIOCM_CAR | TIOCM_CTS;
-}
-
-/* port->lock held by caller.  */
-static void sunhv_stop_tx(struct uart_port *port)
-{
-	return;
-}
-
-/* port->lock held by caller.  */
-static void sunhv_start_tx(struct uart_port *port)
-{
-	transmit_chars(port);
-}
-
-/* port->lock is not held.  */
-static void sunhv_send_xchar(struct uart_port *port, char ch)
-{
-	unsigned long flags;
-	int limit = 10000;
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	while (limit-- > 0) {
-		long status = sun4v_con_putchar(ch);
-		if (status == HV_EOK)
-			break;
-		udelay(1);
-	}
-
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/* port->lock held by caller.  */
-static void sunhv_stop_rx(struct uart_port *port)
-{
-}
-
-/* port->lock held by caller.  */
-static void sunhv_enable_ms(struct uart_port *port)
-{
-}
-
-/* port->lock is not held.  */
-static void sunhv_break_ctl(struct uart_port *port, int break_state)
-{
-	if (break_state) {
-		unsigned long flags;
-		int limit = 10000;
-
-		spin_lock_irqsave(&port->lock, flags);
-
-		while (limit-- > 0) {
-			long status = sun4v_con_putchar(CON_BREAK);
-			if (status == HV_EOK)
-				break;
-			udelay(1);
-		}
-
-		spin_unlock_irqrestore(&port->lock, flags);
-	}
-}
-
-/* port->lock is not held.  */
-static int sunhv_startup(struct uart_port *port)
-{
-	return 0;
-}
-
-/* port->lock is not held.  */
-static void sunhv_shutdown(struct uart_port *port)
-{
-}
-
-/* port->lock is not held.  */
-static void sunhv_set_termios(struct uart_port *port, struct ktermios *termios,
-			      struct ktermios *old)
-{
-	unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000);
-	unsigned int quot = uart_get_divisor(port, baud);
-	unsigned int iflag, cflag;
-	unsigned long flags;
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	iflag = termios->c_iflag;
-	cflag = termios->c_cflag;
-
-	port->ignore_status_mask = 0;
-	if (iflag & IGNBRK)
-		port->ignore_status_mask |= IGNORE_BREAK;
-	if ((cflag & CREAD) == 0)
-		port->ignore_status_mask |= IGNORE_ALL;
-
-	/* XXX */
-	uart_update_timeout(port, cflag,
-			    (port->uartclk / (16 * quot)));
-
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static const char *sunhv_type(struct uart_port *port)
-{
-	return "SUN4V HCONS";
-}
-
-static void sunhv_release_port(struct uart_port *port)
-{
-}
-
-static int sunhv_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
-static void sunhv_config_port(struct uart_port *port, int flags)
-{
-}
-
-static int sunhv_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
-	return -EINVAL;
-}
-
-static struct uart_ops sunhv_pops = {
-	.tx_empty	= sunhv_tx_empty,
-	.set_mctrl	= sunhv_set_mctrl,
-	.get_mctrl	= sunhv_get_mctrl,
-	.stop_tx	= sunhv_stop_tx,
-	.start_tx	= sunhv_start_tx,
-	.send_xchar	= sunhv_send_xchar,
-	.stop_rx	= sunhv_stop_rx,
-	.enable_ms	= sunhv_enable_ms,
-	.break_ctl	= sunhv_break_ctl,
-	.startup	= sunhv_startup,
-	.shutdown	= sunhv_shutdown,
-	.set_termios	= sunhv_set_termios,
-	.type		= sunhv_type,
-	.release_port	= sunhv_release_port,
-	.request_port	= sunhv_request_port,
-	.config_port	= sunhv_config_port,
-	.verify_port	= sunhv_verify_port,
-};
-
-static struct uart_driver sunhv_reg = {
-	.owner			= THIS_MODULE,
-	.driver_name		= "sunhv",
-	.dev_name		= "ttyS",
-	.major			= TTY_MAJOR,
-};
-
-static struct uart_port *sunhv_port;
-
-/* Copy 's' into the con_write_page, decoding "\n" into
- * "\r\n" along the way.  We have to return two lengths
- * because the caller needs to know how much to advance
- * 's' and also how many bytes to output via con_write_page.
- */
-static int fill_con_write_page(const char *s, unsigned int n,
-			       unsigned long *page_bytes)
-{
-	const char *orig_s = s;
-	char *p = con_write_page;
-	int left = PAGE_SIZE;
-
-	while (n--) {
-		if (*s == '\n') {
-			if (left < 2)
-				break;
-			*p++ = '\r';
-			left--;
-		} else if (left < 1)
-			break;
-		*p++ = *s++;
-		left--;
-	}
-	*page_bytes = p - con_write_page;
-	return s - orig_s;
-}
-
-static void sunhv_console_write_paged(struct console *con, const char *s, unsigned n)
-{
-	struct uart_port *port = sunhv_port;
-	unsigned long flags;
-	int locked = 1;
-
-	local_irq_save(flags);
-	if (port->sysrq) {
-		locked = 0;
-	} else if (oops_in_progress) {
-		locked = spin_trylock(&port->lock);
-	} else
-		spin_lock(&port->lock);
-
-	while (n > 0) {
-		unsigned long ra = __pa(con_write_page);
-		unsigned long page_bytes;
-		unsigned int cpy = fill_con_write_page(s, n,
-						       &page_bytes);
-
-		n -= cpy;
-		s += cpy;
-		while (page_bytes > 0) {
-			unsigned long written;
-			int limit = 1000000;
-
-			while (limit--) {
-				unsigned long stat;
-
-				stat = sun4v_con_write(ra, page_bytes,
-						       &written);
-				if (stat == HV_EOK)
-					break;
-				udelay(1);
-			}
-			if (limit < 0)
-				break;
-			page_bytes -= written;
-			ra += written;
-		}
-	}
-
-	if (locked)
-		spin_unlock(&port->lock);
-	local_irq_restore(flags);
-}
-
-static inline void sunhv_console_putchar(struct uart_port *port, char c)
-{
-	int limit = 1000000;
-
-	while (limit-- > 0) {
-		long status = sun4v_con_putchar(c);
-		if (status == HV_EOK)
-			break;
-		udelay(1);
-	}
-}
-
-static void sunhv_console_write_bychar(struct console *con, const char *s, unsigned n)
-{
-	struct uart_port *port = sunhv_port;
-	unsigned long flags;
-	int i, locked = 1;
-
-	local_irq_save(flags);
-	if (port->sysrq) {
-		locked = 0;
-	} else if (oops_in_progress) {
-		locked = spin_trylock(&port->lock);
-	} else
-		spin_lock(&port->lock);
-
-	for (i = 0; i < n; i++) {
-		if (*s == '\n')
-			sunhv_console_putchar(port, '\r');
-		sunhv_console_putchar(port, *s++);
-	}
-
-	if (locked)
-		spin_unlock(&port->lock);
-	local_irq_restore(flags);
-}
-
-static struct console sunhv_console = {
-	.name	=	"ttyHV",
-	.write	=	sunhv_console_write_bychar,
-	.device	=	uart_console_device,
-	.flags	=	CON_PRINTBUFFER,
-	.index	=	-1,
-	.data	=	&sunhv_reg,
-};
-
-static int __devinit hv_probe(struct platform_device *op, const struct of_device_id *match)
-{
-	struct uart_port *port;
-	unsigned long minor;
-	int err;
-
-	if (op->archdata.irqs[0] == 0xffffffff)
-		return -ENODEV;
-
-	port = kzalloc(sizeof(struct uart_port), GFP_KERNEL);
-	if (unlikely(!port))
-		return -ENOMEM;
-
-	minor = 1;
-	if (sun4v_hvapi_register(HV_GRP_CORE, 1, &minor) == 0 &&
-	    minor >= 1) {
-		err = -ENOMEM;
-		con_write_page = kzalloc(PAGE_SIZE, GFP_KERNEL);
-		if (!con_write_page)
-			goto out_free_port;
-
-		con_read_page = kzalloc(PAGE_SIZE, GFP_KERNEL);
-		if (!con_read_page)
-			goto out_free_con_write_page;
-
-		sunhv_console.write = sunhv_console_write_paged;
-		sunhv_ops = &bywrite_ops;
-	}
-
-	sunhv_port = port;
-
-	port->line = 0;
-	port->ops = &sunhv_pops;
-	port->type = PORT_SUNHV;
-	port->uartclk = ( 29491200 / 16 ); /* arbitrary */
-
-	port->membase = (unsigned char __iomem *) __pa(port);
-
-	port->irq = op->archdata.irqs[0];
-
-	port->dev = &op->dev;
-
-	err = sunserial_register_minors(&sunhv_reg, 1);
-	if (err)
-		goto out_free_con_read_page;
-
-	sunserial_console_match(&sunhv_console, op->dev.of_node,
-				&sunhv_reg, port->line, false);
-
-	err = uart_add_one_port(&sunhv_reg, port);
-	if (err)
-		goto out_unregister_driver;
-
-	err = request_irq(port->irq, sunhv_interrupt, 0, "hvcons", port);
-	if (err)
-		goto out_remove_port;
-
-	dev_set_drvdata(&op->dev, port);
-
-	return 0;
-
-out_remove_port:
-	uart_remove_one_port(&sunhv_reg, port);
-
-out_unregister_driver:
-	sunserial_unregister_minors(&sunhv_reg, 1);
-
-out_free_con_read_page:
-	kfree(con_read_page);
-
-out_free_con_write_page:
-	kfree(con_write_page);
-
-out_free_port:
-	kfree(port);
-	sunhv_port = NULL;
-	return err;
-}
-
-static int __devexit hv_remove(struct platform_device *dev)
-{
-	struct uart_port *port = dev_get_drvdata(&dev->dev);
-
-	free_irq(port->irq, port);
-
-	uart_remove_one_port(&sunhv_reg, port);
-
-	sunserial_unregister_minors(&sunhv_reg, 1);
-
-	kfree(port);
-	sunhv_port = NULL;
-
-	dev_set_drvdata(&dev->dev, NULL);
-
-	return 0;
-}
-
-static const struct of_device_id hv_match[] = {
-	{
-		.name = "console",
-		.compatible = "qcn",
-	},
-	{
-		.name = "console",
-		.compatible = "SUNW,sun4v-console",
-	},
-	{},
-};
-MODULE_DEVICE_TABLE(of, hv_match);
-
-static struct of_platform_driver hv_driver = {
-	.driver = {
-		.name = "hv",
-		.owner = THIS_MODULE,
-		.of_match_table = hv_match,
-	},
-	.probe		= hv_probe,
-	.remove		= __devexit_p(hv_remove),
-};
-
-static int __init sunhv_init(void)
-{
-	if (tlb_type != hypervisor)
-		return -ENODEV;
-
-	return of_register_platform_driver(&hv_driver);
-}
-
-static void __exit sunhv_exit(void)
-{
-	of_unregister_platform_driver(&hv_driver);
-}
-
-module_init(sunhv_init);
-module_exit(sunhv_exit);
-
-MODULE_AUTHOR("David S. Miller");
-MODULE_DESCRIPTION("SUN4V Hypervisor console driver");
-MODULE_VERSION("2.0");
-MODULE_LICENSE("GPL");