[06/28] tty/serial: remove the sn_console driver
diff mbox series

Message ID 20190813072514.23299-7-hch@lst.de
State New
Headers show
Series
  • [01/28] char: remove the SGI snsc driver
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Commit Message

Christoph Hellwig Aug. 13, 2019, 7:24 a.m. UTC
The SGI SN2 support is about to be removed.  Remove this driver that
depends on the SN2 support.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/ia64/configs/generic_defconfig   |    1 -
 arch/ia64/configs/gensparse_defconfig |    1 -
 arch/ia64/kernel/setup.c              |    7 -
 drivers/tty/serial/Kconfig            |   10 -
 drivers/tty/serial/Makefile           |    1 -
 drivers/tty/serial/sn_console.c       | 1036 -------------------------
 6 files changed, 1056 deletions(-)
 delete mode 100644 drivers/tty/serial/sn_console.c

Patch
diff mbox series

diff --git a/arch/ia64/configs/generic_defconfig b/arch/ia64/configs/generic_defconfig
index a41afb3ef209..62698ea5d3f2 100644
--- a/arch/ia64/configs/generic_defconfig
+++ b/arch/ia64/configs/generic_defconfig
@@ -94,7 +94,6 @@  CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=6
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
-CONFIG_SERIAL_SGI_L1_CONSOLE=y
 CONFIG_SERIAL_SGI_IOC4=y
 # CONFIG_HW_RANDOM is not set
 CONFIG_EFI_RTC=y
diff --git a/arch/ia64/configs/gensparse_defconfig b/arch/ia64/configs/gensparse_defconfig
index 07484aa6f16f..b910318f2348 100644
--- a/arch/ia64/configs/gensparse_defconfig
+++ b/arch/ia64/configs/gensparse_defconfig
@@ -83,7 +83,6 @@  CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=6
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
-CONFIG_SERIAL_SGI_L1_CONSOLE=y
 CONFIG_SERIAL_SGI_IOC4=y
 CONFIG_SERIAL_SGI_IOC3=y
 # CONFIG_HW_RANDOM is not set
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index c9cfa760cd57..a0480a4e65c1 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -463,13 +463,6 @@  early_console_setup (char *cmdline)
 {
 	int earlycons = 0;
 
-#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
-	{
-		extern int sn_serial_console_early_setup(void);
-		if (!sn_serial_console_early_setup())
-			earlycons++;
-	}
-#endif
 #ifdef CONFIG_EFI_PCDP
 	if (!efi_setup_pcdp_console(cmdline))
 		earlycons++;
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 3083dbae35f7..e9930af78acc 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -855,16 +855,6 @@  config SERIAL_CPM_CONSOLE
 	  your boot loader (lilo or loadlin) about how to pass options to the
 	  kernel at boot time.)
 
-config SERIAL_SGI_L1_CONSOLE
-	bool "SGI Altix L1 serial console support"
-	depends on IA64_GENERIC || IA64_SGI_SN2
-	select SERIAL_CORE
-	select SERIAL_CORE_CONSOLE
-	help
-		If you have an SGI Altix and you would like to use the system
-		controller serial port as your console (you want this!),
-		say Y.  Otherwise, say N.
-
 config SERIAL_PIC32
 	tristate "Microchip PIC32 serial support"
 	depends on MACH_PIC32
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 15a0fccadf7e..caa978980a6e 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -41,7 +41,6 @@  obj-$(CONFIG_SERIAL_HS_LPC32XX) += lpc32xx_hs.o
 obj-$(CONFIG_SERIAL_DZ) += dz.o
 obj-$(CONFIG_SERIAL_ZS) += zs.o
 obj-$(CONFIG_SERIAL_SH_SCI) += sh-sci.o
-obj-$(CONFIG_SERIAL_SGI_L1_CONSOLE) += sn_console.o
 obj-$(CONFIG_SERIAL_CPM) += cpm_uart/
 obj-$(CONFIG_SERIAL_IMX) += imx.o
 obj-$(CONFIG_SERIAL_MPC52xx) += mpc52xx_uart.o
diff --git a/drivers/tty/serial/sn_console.c b/drivers/tty/serial/sn_console.c
deleted file mode 100644
index 283493358a62..000000000000
--- a/drivers/tty/serial/sn_console.c
+++ /dev/null
@@ -1,1036 +0,0 @@ 
-// SPDX-License-Identifier: GPL-2.0
-/*
- * C-Brick Serial Port (and console) driver for SGI Altix machines.
- *
- * This driver is NOT suitable for talking to the l1-controller for
- * anything other than 'console activities' --- please use the l1
- * driver for that.
- *
- *
- * Copyright (c) 2004-2006 Silicon Graphics, Inc.  All Rights Reserved.
- *
- * Contact information:  Silicon Graphics, Inc., 1500 Crittenden Lane,
- * Mountain View, CA  94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/NoticeExplan
- */
-
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/sysrq.h>
-#include <linux/circ_buf.h>
-#include <linux/serial_reg.h>
-#include <linux/delay.h> /* for mdelay */
-#include <linux/miscdevice.h>
-#include <linux/serial_core.h>
-
-#include <asm/io.h>
-#include <asm/sn/simulator.h>
-#include <asm/sn/sn_sal.h>
-
-/* number of characters we can transmit to the SAL console at a time */
-#define SN_SAL_MAX_CHARS 120
-
-/* 64K, when we're asynch, it must be at least printk's LOG_BUF_LEN to
- * avoid losing chars, (always has to be a power of 2) */
-#define SN_SAL_BUFFER_SIZE (64 * (1 << 10))
-
-#define SN_SAL_UART_FIFO_DEPTH 16
-#define SN_SAL_UART_FIFO_SPEED_CPS (9600/10)
-
-/* sn_transmit_chars() calling args */
-#define TRANSMIT_BUFFERED	0
-#define TRANSMIT_RAW		1
-
-/* To use dynamic numbers only and not use the assigned major and minor,
- * define the following.. */
-				  /* #define USE_DYNAMIC_MINOR 1 *//* use dynamic minor number */
-#define USE_DYNAMIC_MINOR 0	/* Don't rely on misc_register dynamic minor */
-
-/* Device name we're using */
-#define DEVICE_NAME "ttySG"
-#define DEVICE_NAME_DYNAMIC "ttySG0"	/* need full name for misc_register */
-/* The major/minor we are using, ignored for USE_DYNAMIC_MINOR */
-#define DEVICE_MAJOR 204
-#define DEVICE_MINOR 40
-
-#ifdef CONFIG_MAGIC_SYSRQ
-static char sysrq_serial_str[] = "\eSYS";
-static char *sysrq_serial_ptr = sysrq_serial_str;
-static unsigned long sysrq_requested;
-#endif /* CONFIG_MAGIC_SYSRQ */
-
-/*
- * Port definition - this kinda drives it all
- */
-struct sn_cons_port {
-	struct timer_list sc_timer;
-	struct uart_port sc_port;
-	struct sn_sal_ops {
-		int (*sal_puts_raw) (const char *s, int len);
-		int (*sal_puts) (const char *s, int len);
-		int (*sal_getc) (void);
-		int (*sal_input_pending) (void);
-		void (*sal_wakeup_transmit) (struct sn_cons_port *, int);
-	} *sc_ops;
-	unsigned long sc_interrupt_timeout;
-	int sc_is_asynch;
-};
-
-static struct sn_cons_port sal_console_port;
-static int sn_process_input;
-
-/* Only used if USE_DYNAMIC_MINOR is set to 1 */
-static struct miscdevice misc;	/* used with misc_register for dynamic */
-
-extern void early_sn_setup(void);
-
-#undef DEBUG
-#ifdef DEBUG
-static int sn_debug_printf(const char *fmt, ...);
-#define DPRINTF(x...) sn_debug_printf(x)
-#else
-#define DPRINTF(x...) do { } while (0)
-#endif
-
-/* Prototypes */
-static int snt_hw_puts_raw(const char *, int);
-static int snt_hw_puts_buffered(const char *, int);
-static int snt_poll_getc(void);
-static int snt_poll_input_pending(void);
-static int snt_intr_getc(void);
-static int snt_intr_input_pending(void);
-static void sn_transmit_chars(struct sn_cons_port *, int);
-
-/* A table for polling:
- */
-static struct sn_sal_ops poll_ops = {
-	.sal_puts_raw = snt_hw_puts_raw,
-	.sal_puts = snt_hw_puts_raw,
-	.sal_getc = snt_poll_getc,
-	.sal_input_pending = snt_poll_input_pending
-};
-
-/* A table for interrupts enabled */
-static struct sn_sal_ops intr_ops = {
-	.sal_puts_raw = snt_hw_puts_raw,
-	.sal_puts = snt_hw_puts_buffered,
-	.sal_getc = snt_intr_getc,
-	.sal_input_pending = snt_intr_input_pending,
-	.sal_wakeup_transmit = sn_transmit_chars
-};
-
-/* the console does output in two distinctly different ways:
- * synchronous (raw) and asynchronous (buffered).  initially, early_printk
- * does synchronous output.  any data written goes directly to the SAL
- * to be output (incidentally, it is internally buffered by the SAL)
- * after interrupts and timers are initialized and available for use,
- * the console init code switches to asynchronous output.  this is
- * also the earliest opportunity to begin polling for console input.
- * after console initialization, console output and tty (serial port)
- * output is buffered and sent to the SAL asynchronously (either by
- * timer callback or by UART interrupt) */
-
-/* routines for running the console in polling mode */
-
-/**
- * snt_poll_getc - Get a character from the console in polling mode
- *
- */
-static int snt_poll_getc(void)
-{
-	int ch;
-
-	ia64_sn_console_getc(&ch);
-	return ch;
-}
-
-/**
- * snt_poll_input_pending - Check if any input is waiting - polling mode.
- *
- */
-static int snt_poll_input_pending(void)
-{
-	int status, input;
-
-	status = ia64_sn_console_check(&input);
-	return !status && input;
-}
-
-/* routines for an interrupt driven console (normal) */
-
-/**
- * snt_intr_getc - Get a character from the console, interrupt mode
- *
- */
-static int snt_intr_getc(void)
-{
-	return ia64_sn_console_readc();
-}
-
-/**
- * snt_intr_input_pending - Check if input is pending, interrupt mode
- *
- */
-static int snt_intr_input_pending(void)
-{
-	return ia64_sn_console_intr_status() & SAL_CONSOLE_INTR_RECV;
-}
-
-/* these functions are polled and interrupt */
-
-/**
- * snt_hw_puts_raw - Send raw string to the console, polled or interrupt mode
- * @s: String
- * @len: Length
- *
- */
-static int snt_hw_puts_raw(const char *s, int len)
-{
-	/* this will call the PROM and not return until this is done */
-	return ia64_sn_console_putb(s, len);
-}
-
-/**
- * snt_hw_puts_buffered - Send string to console, polled or interrupt mode
- * @s: String
- * @len: Length
- *
- */
-static int snt_hw_puts_buffered(const char *s, int len)
-{
-	/* queue data to the PROM */
-	return ia64_sn_console_xmit_chars((char *)s, len);
-}
-
-/* uart interface structs
- * These functions are associated with the uart_port that the serial core
- * infrastructure calls.
- *
- * Note: Due to how the console works, many routines are no-ops.
- */
-
-/**
- * snp_type - What type of console are we?
- * @port: Port to operate with (we ignore since we only have one port)
- *
- */
-static const char *snp_type(struct uart_port *port)
-{
-	return ("SGI SN L1");
-}
-
-/**
- * snp_tx_empty - Is the transmitter empty?  We pretend we're always empty
- * @port: Port to operate on (we ignore since we only have one port)
- *
- */
-static unsigned int snp_tx_empty(struct uart_port *port)
-{
-	return 1;
-}
-
-/**
- * snp_stop_tx - stop the transmitter - no-op for us
- * @port: Port to operat eon - we ignore - no-op function
- *
- */
-static void snp_stop_tx(struct uart_port *port)
-{
-}
-
-/**
- * snp_release_port - Free i/o and resources for port - no-op for us
- * @port: Port to operate on - we ignore - no-op function
- *
- */
-static void snp_release_port(struct uart_port *port)
-{
-}
-
-/**
- * snp_shutdown - shut down the port - free irq and disable - no-op for us
- * @port: Port to shut down - we ignore
- *
- */
-static void snp_shutdown(struct uart_port *port)
-{
-}
-
-/**
- * snp_set_mctrl - set control lines (dtr, rts, etc) - no-op for our console
- * @port: Port to operate on - we ignore
- * @mctrl: Lines to set/unset - we ignore
- *
- */
-static void snp_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-}
-
-/**
- * snp_get_mctrl - get contorl line info, we just return a static value
- * @port: port to operate on - we only have one port so we ignore this
- *
- */
-static unsigned int snp_get_mctrl(struct uart_port *port)
-{
-	return TIOCM_CAR | TIOCM_RNG | TIOCM_DSR | TIOCM_CTS;
-}
-
-/**
- * snp_stop_rx - Stop the receiver - we ignor ethis
- * @port: Port to operate on - we ignore
- *
- */
-static void snp_stop_rx(struct uart_port *port)
-{
-}
-
-/**
- * snp_start_tx - Start transmitter
- * @port: Port to operate on
- *
- */
-static void snp_start_tx(struct uart_port *port)
-{
-	if (sal_console_port.sc_ops->sal_wakeup_transmit)
-		sal_console_port.sc_ops->sal_wakeup_transmit(&sal_console_port,
-							     TRANSMIT_BUFFERED);
-
-}
-
-/**
- * snp_break_ctl - handle breaks - ignored by us
- * @port: Port to operate on
- * @break_state: Break state
- *
- */
-static void snp_break_ctl(struct uart_port *port, int break_state)
-{
-}
-
-/**
- * snp_startup - Start up the serial port - always return 0 (We're always on)
- * @port: Port to operate on
- *
- */
-static int snp_startup(struct uart_port *port)
-{
-	return 0;
-}
-
-/**
- * snp_set_termios - set termios stuff - we ignore these
- * @port: port to operate on
- * @termios: New settings
- * @termios: Old
- *
- */
-static void
-snp_set_termios(struct uart_port *port, struct ktermios *termios,
-		struct ktermios *old)
-{
-}
-
-/**
- * snp_request_port - allocate resources for port - ignored by us
- * @port: port to operate on
- *
- */
-static int snp_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
-/**
- * snp_config_port - allocate resources, set up - we ignore,  we're always on
- * @port: Port to operate on
- * @flags: flags used for port setup
- *
- */
-static void snp_config_port(struct uart_port *port, int flags)
-{
-}
-
-/* Associate the uart functions above - given to serial core */
-
-static const struct uart_ops sn_console_ops = {
-	.tx_empty = snp_tx_empty,
-	.set_mctrl = snp_set_mctrl,
-	.get_mctrl = snp_get_mctrl,
-	.stop_tx = snp_stop_tx,
-	.start_tx = snp_start_tx,
-	.stop_rx = snp_stop_rx,
-	.break_ctl = snp_break_ctl,
-	.startup = snp_startup,
-	.shutdown = snp_shutdown,
-	.set_termios = snp_set_termios,
-	.pm = NULL,
-	.type = snp_type,
-	.release_port = snp_release_port,
-	.request_port = snp_request_port,
-	.config_port = snp_config_port,
-	.verify_port = NULL,
-};
-
-/* End of uart struct functions and defines */
-
-#ifdef DEBUG
-
-/**
- * sn_debug_printf - close to hardware debugging printf
- * @fmt: printf format
- *
- * This is as "close to the metal" as we can get, used when the driver
- * itself may be broken.
- *
- */
-static int sn_debug_printf(const char *fmt, ...)
-{
-	static char printk_buf[1024];
-	int printed_len;
-	va_list args;
-
-	va_start(args, fmt);
-	printed_len = vsnprintf(printk_buf, sizeof(printk_buf), fmt, args);
-
-	if (!sal_console_port.sc_ops) {
-		sal_console_port.sc_ops = &poll_ops;
-		early_sn_setup();
-	}
-	sal_console_port.sc_ops->sal_puts_raw(printk_buf, printed_len);
-
-	va_end(args);
-	return printed_len;
-}
-#endif				/* DEBUG */
-
-/*
- * Interrupt handling routines.
- */
-
-/**
- * sn_receive_chars - Grab characters, pass them to tty layer
- * @port: Port to operate on
- * @flags: irq flags
- *
- * Note: If we're not registered with the serial core infrastructure yet,
- * we don't try to send characters to it...
- *
- */
-static void
-sn_receive_chars(struct sn_cons_port *port, unsigned long flags)
-{
-	struct tty_port *tport = NULL;
-	int ch;
-
-	if (!port) {
-		printk(KERN_ERR "sn_receive_chars - port NULL so can't receive\n");
-		return;
-	}
-
-	if (!port->sc_ops) {
-		printk(KERN_ERR "sn_receive_chars - port->sc_ops  NULL so can't receive\n");
-		return;
-	}
-
-	if (port->sc_port.state) {
-		/* The serial_core stuffs are initialized, use them */
-		tport = &port->sc_port.state->port;
-	}
-
-	while (port->sc_ops->sal_input_pending()) {
-		ch = port->sc_ops->sal_getc();
-		if (ch < 0) {
-			printk(KERN_ERR "sn_console: An error occurred while "
-			       "obtaining data from the console (0x%0x)\n", ch);
-			break;
-		}
-#ifdef CONFIG_MAGIC_SYSRQ
-                if (sysrq_requested) {
-                        unsigned long sysrq_timeout = sysrq_requested + HZ*5;
-
-                        sysrq_requested = 0;
-                        if (ch && time_before(jiffies, sysrq_timeout)) {
-                                spin_unlock_irqrestore(&port->sc_port.lock, flags);
-                                handle_sysrq(ch);
-                                spin_lock_irqsave(&port->sc_port.lock, flags);
-                                /* ignore actual sysrq command char */
-                                continue;
-                        }
-                }
-                if (ch == *sysrq_serial_ptr) {
-                        if (!(*++sysrq_serial_ptr)) {
-                                sysrq_requested = jiffies;
-                                sysrq_serial_ptr = sysrq_serial_str;
-                        }
-			/*
-			 * ignore the whole sysrq string except for the
-			 * leading escape
-			 */
-			if (ch != '\e')
-				continue;
-                }
-                else
-			sysrq_serial_ptr = sysrq_serial_str;
-#endif /* CONFIG_MAGIC_SYSRQ */
-
-		/* record the character to pass up to the tty layer */
-		if (tport) {
-			if (tty_insert_flip_char(tport, ch, TTY_NORMAL) == 0)
-				break;
-		}
-		port->sc_port.icount.rx++;
-	}
-
-	if (tport)
-		tty_flip_buffer_push(tport);
-}
-
-/**
- * sn_transmit_chars - grab characters from serial core, send off
- * @port: Port to operate on
- * @raw: Transmit raw or buffered
- *
- * Note: If we're early, before we're registered with serial core, the
- * writes are going through sn_sal_console_write because that's how
- * register_console has been set up.  We currently could have asynch
- * polls calling this function due to sn_sal_switch_to_asynch but we can
- * ignore them until we register with the serial core stuffs.
- *
- */
-static void sn_transmit_chars(struct sn_cons_port *port, int raw)
-{
-	int xmit_count, tail, head, loops, ii;
-	int result;
-	char *start;
-	struct circ_buf *xmit;
-
-	if (!port)
-		return;
-
-	BUG_ON(!port->sc_is_asynch);
-
-	if (port->sc_port.state) {
-		/* We're initialized, using serial core infrastructure */
-		xmit = &port->sc_port.state->xmit;
-	} else {
-		/* Probably sn_sal_switch_to_asynch has been run but serial core isn't
-		 * initialized yet.  Just return.  Writes are going through
-		 * sn_sal_console_write (due to register_console) at this time.
-		 */
-		return;
-	}
-
-	if (uart_circ_empty(xmit) || uart_tx_stopped(&port->sc_port)) {
-		/* Nothing to do. */
-		ia64_sn_console_intr_disable(SAL_CONSOLE_INTR_XMIT);
-		return;
-	}
-
-	head = xmit->head;
-	tail = xmit->tail;
-	start = &xmit->buf[tail];
-
-	/* twice around gets the tail to the end of the buffer and
-	 * then to the head, if needed */
-	loops = (head < tail) ? 2 : 1;
-
-	for (ii = 0; ii < loops; ii++) {
-		xmit_count = (head < tail) ?
-		    (UART_XMIT_SIZE - tail) : (head - tail);
-
-		if (xmit_count > 0) {
-			if (raw == TRANSMIT_RAW)
-				result =
-				    port->sc_ops->sal_puts_raw(start,
-							       xmit_count);
-			else
-				result =
-				    port->sc_ops->sal_puts(start, xmit_count);
-#ifdef DEBUG
-			if (!result)
-				DPRINTF("`");
-#endif
-			if (result > 0) {
-				xmit_count -= result;
-				port->sc_port.icount.tx += result;
-				tail += result;
-				tail &= UART_XMIT_SIZE - 1;
-				xmit->tail = tail;
-				start = &xmit->buf[tail];
-			}
-		}
-	}
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(&port->sc_port);
-
-	if (uart_circ_empty(xmit))
-		snp_stop_tx(&port->sc_port);	/* no-op for us */
-}
-
-/**
- * sn_sal_interrupt - Handle console interrupts
- * @irq: irq #, useful for debug statements
- * @dev_id: our pointer to our port (sn_cons_port which contains the uart port)
- *
- */
-static irqreturn_t sn_sal_interrupt(int irq, void *dev_id)
-{
-	struct sn_cons_port *port = (struct sn_cons_port *)dev_id;
-	unsigned long flags;
-	int status = ia64_sn_console_intr_status();
-
-	if (!port)
-		return IRQ_NONE;
-
-	spin_lock_irqsave(&port->sc_port.lock, flags);
-	if (status & SAL_CONSOLE_INTR_RECV) {
-		sn_receive_chars(port, flags);
-	}
-	if (status & SAL_CONSOLE_INTR_XMIT) {
-		sn_transmit_chars(port, TRANSMIT_BUFFERED);
-	}
-	spin_unlock_irqrestore(&port->sc_port.lock, flags);
-	return IRQ_HANDLED;
-}
-
-/**
- * sn_sal_timer_poll - this function handles polled console mode
- * @data: A pointer to our sn_cons_port (which contains the uart port)
- *
- * data is the pointer that init_timer will store for us.  This function is
- * associated with init_timer to see if there is any console traffic.
- * Obviously not used in interrupt mode
- *
- */
-static void sn_sal_timer_poll(struct timer_list *t)
-{
-	struct sn_cons_port *port = from_timer(port, t, sc_timer);
-	unsigned long flags;
-
-	if (!port)
-		return;
-
-	if (!port->sc_port.irq) {
-		spin_lock_irqsave(&port->sc_port.lock, flags);
-		if (sn_process_input)
-			sn_receive_chars(port, flags);
-		sn_transmit_chars(port, TRANSMIT_RAW);
-		spin_unlock_irqrestore(&port->sc_port.lock, flags);
-		mod_timer(&port->sc_timer,
-			  jiffies + port->sc_interrupt_timeout);
-	}
-}
-
-/*
- * Boot-time initialization code
- */
-
-/**
- * sn_sal_switch_to_asynch - Switch to async mode (as opposed to synch)
- * @port: Our sn_cons_port (which contains the uart port)
- *
- * So this is used by sn_sal_serial_console_init (early on, before we're
- * registered with serial core).  It's also used by sn_sal_init
- * right after we've registered with serial core.  The later only happens
- * if we didn't already come through here via sn_sal_serial_console_init.
- *
- */
-static void __init sn_sal_switch_to_asynch(struct sn_cons_port *port)
-{
-	unsigned long flags;
-
-	if (!port)
-		return;
-
-	DPRINTF("sn_console: about to switch to asynchronous console\n");
-
-	/* without early_printk, we may be invoked late enough to race
-	 * with other cpus doing console IO at this point, however
-	 * console interrupts will never be enabled */
-	spin_lock_irqsave(&port->sc_port.lock, flags);
-
-	/* early_printk invocation may have done this for us */
-	if (!port->sc_ops)
-		port->sc_ops = &poll_ops;
-
-	/* we can't turn on the console interrupt (as request_irq
-	 * calls kmalloc, which isn't set up yet), so we rely on a
-	 * timer to poll for input and push data from the console
-	 * buffer.
-	 */
-	timer_setup(&port->sc_timer, sn_sal_timer_poll, 0);
-
-	if (IS_RUNNING_ON_SIMULATOR())
-		port->sc_interrupt_timeout = 6;
-	else {
-		/* 960cps / 16 char FIFO = 60HZ
-		 * HZ / (SN_SAL_FIFO_SPEED_CPS / SN_SAL_FIFO_DEPTH) */
-		port->sc_interrupt_timeout =
-		    HZ * SN_SAL_UART_FIFO_DEPTH / SN_SAL_UART_FIFO_SPEED_CPS;
-	}
-	mod_timer(&port->sc_timer, jiffies + port->sc_interrupt_timeout);
-
-	port->sc_is_asynch = 1;
-	spin_unlock_irqrestore(&port->sc_port.lock, flags);
-}
-
-/**
- * sn_sal_switch_to_interrupts - Switch to interrupt driven mode
- * @port: Our sn_cons_port (which contains the uart port)
- *
- * In sn_sal_init, after we're registered with serial core and
- * the port is added, this function is called to switch us to interrupt
- * mode.  We were previously in asynch/polling mode (using init_timer).
- *
- * We attempt to switch to interrupt mode here by calling
- * request_irq.  If that works out, we enable receive interrupts.
- */
-static void __init sn_sal_switch_to_interrupts(struct sn_cons_port *port)
-{
-	unsigned long flags;
-
-	if (port) {
-		DPRINTF("sn_console: switching to interrupt driven console\n");
-
-		if (request_irq(SGI_UART_VECTOR, sn_sal_interrupt,
-				IRQF_SHARED,
-				"SAL console driver", port) >= 0) {
-			spin_lock_irqsave(&port->sc_port.lock, flags);
-			port->sc_port.irq = SGI_UART_VECTOR;
-			port->sc_ops = &intr_ops;
-			irq_set_handler(port->sc_port.irq, handle_level_irq);
-
-			/* turn on receive interrupts */
-			ia64_sn_console_intr_enable(SAL_CONSOLE_INTR_RECV);
-			spin_unlock_irqrestore(&port->sc_port.lock, flags);
-		}
-		else {
-			printk(KERN_INFO
-			    "sn_console: console proceeding in polled mode\n");
-		}
-	}
-}
-
-/*
- * Kernel console definitions
- */
-
-static void sn_sal_console_write(struct console *, const char *, unsigned);
-static int sn_sal_console_setup(struct console *, char *);
-static struct uart_driver sal_console_uart;
-extern struct tty_driver *uart_console_device(struct console *, int *);
-
-static struct console sal_console = {
-	.name = DEVICE_NAME,
-	.write = sn_sal_console_write,
-	.device = uart_console_device,
-	.setup = sn_sal_console_setup,
-	.index = -1,		/* unspecified */
-	.data = &sal_console_uart,
-};
-
-#define SAL_CONSOLE	&sal_console
-
-static struct uart_driver sal_console_uart = {
-	.owner = THIS_MODULE,
-	.driver_name = "sn_console",
-	.dev_name = DEVICE_NAME,
-	.major = 0,		/* major/minor set at registration time per USE_DYNAMIC_MINOR */
-	.minor = 0,
-	.nr = 1,		/* one port */
-	.cons = SAL_CONSOLE,
-};
-
-/**
- * sn_sal_init - When the kernel loads us, get us rolling w/ serial core
- *
- * Before this is called, we've been printing kernel messages in a special
- * early mode not making use of the serial core infrastructure.  When our
- * driver is loaded for real, we register the driver and port with serial
- * core and try to enable interrupt driven mode.
- *
- */
-static int __init sn_sal_init(void)
-{
-	int retval;
-
-	if (!ia64_platform_is("sn2"))
-		return 0;
-
-	printk(KERN_INFO "sn_console: Console driver init\n");
-
-	if (USE_DYNAMIC_MINOR == 1) {
-		misc.minor = MISC_DYNAMIC_MINOR;
-		misc.name = DEVICE_NAME_DYNAMIC;
-		retval = misc_register(&misc);
-		if (retval != 0) {
-			printk(KERN_WARNING "Failed to register console "
-			       "device using misc_register.\n");
-			return -ENODEV;
-		}
-		sal_console_uart.major = MISC_MAJOR;
-		sal_console_uart.minor = misc.minor;
-	} else {
-		sal_console_uart.major = DEVICE_MAJOR;
-		sal_console_uart.minor = DEVICE_MINOR;
-	}
-
-	/* We register the driver and the port before switching to interrupts
-	 * or async above so the proper uart structures are populated */
-
-	if (uart_register_driver(&sal_console_uart) < 0) {
-		printk
-		    ("ERROR sn_sal_init failed uart_register_driver, line %d\n",
-		     __LINE__);
-		return -ENODEV;
-	}
-
-	spin_lock_init(&sal_console_port.sc_port.lock);
-
-	/* Setup the port struct with the minimum needed */
-	sal_console_port.sc_port.membase = (char *)1;	/* just needs to be non-zero */
-	sal_console_port.sc_port.type = PORT_16550A;
-	sal_console_port.sc_port.fifosize = SN_SAL_MAX_CHARS;
-	sal_console_port.sc_port.ops = &sn_console_ops;
-	sal_console_port.sc_port.line = 0;
-
-	if (uart_add_one_port(&sal_console_uart, &sal_console_port.sc_port) < 0) {
-		/* error - not sure what I'd do - so I'll do nothing */
-		printk(KERN_ERR "%s: unable to add port\n", __func__);
-	}
-
-	/* when this driver is compiled in, the console initialization
-	 * will have already switched us into asynchronous operation
-	 * before we get here through the initcalls */
-	if (!sal_console_port.sc_is_asynch) {
-		sn_sal_switch_to_asynch(&sal_console_port);
-	}
-
-	/* at this point (device_init) we can try to turn on interrupts */
-	if (!IS_RUNNING_ON_SIMULATOR()) {
-		sn_sal_switch_to_interrupts(&sal_console_port);
-	}
-	sn_process_input = 1;
-	return 0;
-}
-device_initcall(sn_sal_init);
-
-/**
- * puts_raw_fixed - sn_sal_console_write helper for adding \r's as required
- * @puts_raw : puts function to do the writing
- * @s: input string
- * @count: length
- *
- * We need a \r ahead of every \n for direct writes through
- * ia64_sn_console_putb (what sal_puts_raw below actually does).
- *
- */
-
-static void puts_raw_fixed(int (*puts_raw) (const char *s, int len),
-			   const char *s, int count)
-{
-	const char *s1;
-
-	/* Output '\r' before each '\n' */
-	while ((s1 = memchr(s, '\n', count)) != NULL) {
-		puts_raw(s, s1 - s);
-		puts_raw("\r\n", 2);
-		count -= s1 + 1 - s;
-		s = s1 + 1;
-	}
-	puts_raw(s, count);
-}
-
-/**
- * sn_sal_console_write - Print statements before serial core available
- * @console: Console to operate on - we ignore since we have just one
- * @s: String to send
- * @count: length
- *
- * This is referenced in the console struct.  It is used for early
- * console printing before we register with serial core and for things
- * such as kdb.  The console_lock must be held when we get here.
- *
- * This function has some code for trying to print output even if the lock
- * is held.  We try to cover the case where a lock holder could have died.
- * We don't use this special case code if we're not registered with serial
- * core yet.  After we're registered with serial core, the only time this
- * function would be used is for high level kernel output like magic sys req,
- * kdb, and printk's.
- */
-static void
-sn_sal_console_write(struct console *co, const char *s, unsigned count)
-{
-	unsigned long flags = 0;
-	struct sn_cons_port *port = &sal_console_port;
-	static int stole_lock = 0;
-
-	BUG_ON(!port->sc_is_asynch);
-
-	/* We can't look at the xmit buffer if we're not registered with serial core
-	 *  yet.  So only do the fancy recovery after registering
-	 */
-	if (!port->sc_port.state) {
-		/* Not yet registered with serial core - simple case */
-		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
-		return;
-	}
-
-	/* somebody really wants this output, might be an
-	 * oops, kdb, panic, etc.  make sure they get it. */
-	if (!spin_trylock_irqsave(&port->sc_port.lock, flags)) {
-		int lhead = port->sc_port.state->xmit.head;
-		int ltail = port->sc_port.state->xmit.tail;
-		int counter, got_lock = 0;
-
-		/*
-		 * We attempt to determine if someone has died with the
-		 * lock. We wait ~20 secs after the head and tail ptrs
-		 * stop moving and assume the lock holder is not functional
-		 * and plow ahead. If the lock is freed within the time out
-		 * period we re-get the lock and go ahead normally. We also
-		 * remember if we have plowed ahead so that we don't have
-		 * to wait out the time out period again - the asumption
-		 * is that we will time out again.
-		 */
-
-		for (counter = 0; counter < 150; mdelay(125), counter++) {
-			if (stole_lock)
-				break;
-
-			if (spin_trylock_irqsave(&port->sc_port.lock, flags)) {
-				got_lock = 1;
-				break;
-			} else {
-				/* still locked */
-				if ((lhead != port->sc_port.state->xmit.head)
-				    || (ltail !=
-					port->sc_port.state->xmit.tail)) {
-					lhead =
-						port->sc_port.state->xmit.head;
-					ltail =
-						port->sc_port.state->xmit.tail;
-					counter = 0;
-				}
-			}
-		}
-		/* flush anything in the serial core xmit buffer, raw */
-		sn_transmit_chars(port, 1);
-		if (got_lock) {
-			spin_unlock_irqrestore(&port->sc_port.lock, flags);
-			stole_lock = 0;
-		} else {
-			/* fell thru */
-			stole_lock = 1;
-		}
-		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
-	} else {
-		stole_lock = 0;
-		sn_transmit_chars(port, 1);
-		spin_unlock_irqrestore(&port->sc_port.lock, flags);
-
-		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);
-	}
-}
-
-
-/**
- * sn_sal_console_setup - Set up console for early printing
- * @co: Console to work with
- * @options: Options to set
- *
- * Altix console doesn't do anything with baud rates, etc, anyway.
- *
- * This isn't required since not providing the setup function in the
- * console struct is ok.  However, other patches like KDB plop something
- * here so providing it is easier.
- *
- */
-static int sn_sal_console_setup(struct console *co, char *options)
-{
-	return 0;
-}
-
-/**
- * sn_sal_console_write_early - simple early output routine
- * @co - console struct
- * @s - string to print
- * @count - count
- *
- * Simple function to provide early output, before even
- * sn_sal_serial_console_init is called.  Referenced in the
- * console struct registerd in sn_serial_console_early_setup.
- *
- */
-static void __init
-sn_sal_console_write_early(struct console *co, const char *s, unsigned count)
-{
-	puts_raw_fixed(sal_console_port.sc_ops->sal_puts_raw, s, count);
-}
-
-/* Used for very early console printing - again, before
- * sn_sal_serial_console_init is run */
-static struct console sal_console_early __initdata = {
-	.name = "sn_sal",
-	.write = sn_sal_console_write_early,
-	.flags = CON_PRINTBUFFER,
-	.index = -1,
-};
-
-/**
- * sn_serial_console_early_setup - Sets up early console output support
- *
- * Register a console early on...  This is for output before even
- * sn_sal_serial_cosnole_init is called.  This function is called from
- * setup.c.  This allows us to do really early polled writes. When
- * sn_sal_serial_console_init is called, this console is unregistered
- * and a new one registered.
- */
-int __init sn_serial_console_early_setup(void)
-{
-	if (!ia64_platform_is("sn2"))
-		return -1;
-
-	sal_console_port.sc_ops = &poll_ops;
-	spin_lock_init(&sal_console_port.sc_port.lock);
-	early_sn_setup();	/* Find SAL entry points */
-	register_console(&sal_console_early);
-
-	return 0;
-}
-
-/**
- * sn_sal_serial_console_init - Early console output - set up for register
- *
- * This function is called when regular console init happens.  Because we
- * support even earlier console output with sn_serial_console_early_setup
- * (called from setup.c directly), this function unregisters the really
- * early console.
- *
- * Note: Even if setup.c doesn't register sal_console_early, unregistering
- * it here doesn't hurt anything.
- *
- */
-static int __init sn_sal_serial_console_init(void)
-{
-	if (ia64_platform_is("sn2")) {
-		sn_sal_switch_to_asynch(&sal_console_port);
-		DPRINTF("sn_sal_serial_console_init : register console\n");
-		register_console(&sal_console);
-		unregister_console(&sal_console_early);
-	}
-	return 0;
-}
-
-console_initcall(sn_sal_serial_console_init);