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, 2978 deletions

diff --git a/drivers/serial/68360serial.c b/drivers/serial/68360serial.c
deleted file mode 100644
index 88b13356ec10..000000000000
--- a/drivers/serial/68360serial.c
+++ /dev/null
@@ -1,2978 +0,0 @@
-/*
- *  UART driver for 68360 CPM SCC or SMC
- *  Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>,
- *  Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca>
- *  Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
- *
- * I used the serial.c driver as the framework for this driver.
- * Give credit to those guys.
- * The original code was written for the MBX860 board.  I tried to make
- * it generic, but there may be some assumptions in the structures that
- * have to be fixed later.
- * To save porting time, I did not bother to change any object names
- * that are not accessed outside of this file.
- * It still needs lots of work........When it was easy, I included code
- * to support the SCCs, but this has never been tested, nor is it complete.
- * Only the SCCs support modem control, so that is not complete either.
- *
- * This module exports the following rs232 io functions:
- *
- *	int rs_360_init(void);
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serialP.h> 
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <asm/irq.h>
-#include <asm/m68360.h>
-#include <asm/commproc.h>
-
- 
-#ifdef CONFIG_KGDB
-extern void breakpoint(void);
-extern void set_debug_traps(void);
-extern int  kgdb_output_string (const char* s, unsigned int count);
-#endif
-
-
-/* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */
-#include <linux/console.h>
-#include <linux/jiffies.h>
-
-/* this defines the index into rs_table for the port to use
- */
-#ifndef CONFIG_SERIAL_CONSOLE_PORT
-#define CONFIG_SERIAL_CONSOLE_PORT	1 /* ie SMC2 - note USE_SMC2 must be defined */
-#endif
-/* #endif */
-
-#if 0
-/* SCC2 for console
- */
-#undef CONFIG_SERIAL_CONSOLE_PORT
-#define CONFIG_SERIAL_CONSOLE_PORT	2
-#endif
-
-
-#define TX_WAKEUP	ASYNC_SHARE_IRQ
-
-static char *serial_name = "CPM UART driver";
-static char *serial_version = "0.03";
-
-static struct tty_driver *serial_driver;
-int serial_console_setup(struct console *co, char *options);
-
-/*
- * Serial driver configuration section.  Here are the various options:
- */
-#define SERIAL_PARANOIA_CHECK
-#define CONFIG_SERIAL_NOPAUSE_IO
-#define SERIAL_DO_RESTART
-
-/* Set of debugging defines */
-
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-
-#define _INLINE_ inline
-  
-#define DBG_CNT(s)
-
-/* We overload some of the items in the data structure to meet our
- * needs.  For example, the port address is the CPM parameter ram
- * offset for the SCC or SMC.  The maximum number of ports is 4 SCCs and
- * 2 SMCs.  The "hub6" field is used to indicate the channel number, with
- * a flag indicating SCC or SMC, and the number is used as an index into
- * the CPM parameter area for this device.
- * The "type" field is currently set to 0, for PORT_UNKNOWN.  It is
- * not currently used.  I should probably use it to indicate the port
- * type of SMC or SCC.
- * The SMCs do not support any modem control signals.
- */
-#define smc_scc_num	hub6
-#define NUM_IS_SCC	((int)0x00010000)
-#define PORT_NUM(P)	((P) & 0x0000ffff)
-
-
-#if defined (CONFIG_UCQUICC)
-
-volatile extern void *_periph_base;
-/* sipex transceiver
- *   mode bits for       are on pins
- *
- *    SCC2                d16..19
- *    SCC3                d20..23
- *    SCC4                d24..27
- */
-#define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1)))
-
-static uint sipex_mode_bits = 0x00000000;
-
-#endif
-
-/* There is no `serial_state' defined back here in 2.0.
- * Try to get by with serial_struct
- */
-/* #define serial_state serial_struct */
-
-/* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few
- * extras: */
-
-#if 0
-struct async_icount_24 {
-	__u32   cts, dsr, rng, dcd, tx, rx;
-	__u32   frame, parity, overrun, brk;
-	__u32   buf_overrun;
-} icount;
-#endif
-
-#if 0
-
-struct serial_state {
-        int     magic;
-        int     baud_base;
-        unsigned long   port;
-        int     irq;
-        int     flags;
-        int     hub6;
-        int     type;
-        int     line;
-        int     revision;       /* Chip revision (950) */
-        int     xmit_fifo_size;
-        int     custom_divisor;
-        int     count;
-        u8      *iomem_base;
-        u16     iomem_reg_shift;
-        unsigned short  close_delay;
-        unsigned short  closing_wait; /* time to wait before closing */
-        struct async_icount_24     icount; 
-        int     io_type;
-        struct async_struct *info;
-};
-#endif
-
-#define SSTATE_MAGIC 0x5302
-
-
-
-/* SMC2 is sometimes used for low performance TDM interfaces.  Define
- * this as 1 if you want SMC2 as a serial port UART managed by this driver.
- * Define this as 0 if you wish to use SMC2 for something else.
- */
-#define USE_SMC2 1
-
-#if 0
-/* Define SCC to ttySx mapping. */
-#define SCC_NUM_BASE	(USE_SMC2 + 1)	/* SCC base tty "number" */
-
-/* Define which SCC is the first one to use for a serial port.  These
- * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used
- * for Ethernet, and the first available SCC for serial UART is SCC2.
- * NOTE:  IF YOU CHANGE THIS, you have to change the PROFF_xxx and
- * interrupt vectors in the table below to match.
- */
-#define SCC_IDX_BASE	1	/* table index */
-#endif
-
-
-/* Processors other than the 860 only get SMCs configured by default.
- * Either they don't have SCCs or they are allocated somewhere else.
- * Of course, there are now 860s without some SCCs, so we will need to
- * address that someday.
- * The Embedded Planet Multimedia I/O cards use TDM interfaces to the
- * stereo codec parts, and we use SMC2 to help support that.
- */
-static struct serial_state rs_table[] = {
-/*  type   line   PORT           IRQ       FLAGS  smc_scc_num (F.K.A. hub6) */
-	{  0,     0, PRSLOT_SMC1, CPMVEC_SMC1,   0,    0 }    /* SMC1 ttyS0 */
-#if USE_SMC2
-	,{ 0,     0, PRSLOT_SMC2, CPMVEC_SMC2,   0,    1 }     /* SMC2 ttyS1 */
-#endif
-
-#if defined(CONFIG_SERIAL_68360_SCC)
-	,{ 0,     0, PRSLOT_SCC2, CPMVEC_SCC2,   0, (NUM_IS_SCC | 1) }    /* SCC2 ttyS2 */
-	,{ 0,     0, PRSLOT_SCC3, CPMVEC_SCC3,   0, (NUM_IS_SCC | 2) }    /* SCC3 ttyS3 */
-	,{ 0,     0, PRSLOT_SCC4, CPMVEC_SCC4,   0, (NUM_IS_SCC | 3) }    /* SCC4 ttyS4 */
-#endif
-};
-
-#define NR_PORTS	(sizeof(rs_table)/sizeof(struct serial_state))
-
-/* The number of buffer descriptors and their sizes.
- */
-#define RX_NUM_FIFO	4
-#define RX_BUF_SIZE	32
-#define TX_NUM_FIFO	4
-#define TX_BUF_SIZE	32
-
-#define CONSOLE_NUM_FIFO 2
-#define CONSOLE_BUF_SIZE 4
-
-char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE];
-
-/* The async_struct in serial.h does not really give us what we
- * need, so define our own here.
- */
-typedef struct serial_info {
-	int			magic;
-	int			flags;
-
-	struct serial_state	*state;
- 	/* struct serial_struct	*state; */
- 	/* struct async_struct	*state; */
-	
-	struct tty_struct 	*tty;
-	int			read_status_mask;
-	int			ignore_status_mask;
-	int			timeout;
-	int			line;
-	int			x_char;	/* xon/xoff character */
-	int			close_delay;
-	unsigned short		closing_wait;
-	unsigned short		closing_wait2;
-	unsigned long		event;
-	unsigned long		last_active;
-	int			blocked_open; /* # of blocked opens */
-	struct work_struct	tqueue;
-	struct work_struct	tqueue_hangup;
- 	wait_queue_head_t	open_wait; 
- 	wait_queue_head_t	close_wait; 
-
-	
-/* CPM Buffer Descriptor pointers.
-	*/
-	QUICC_BD			*rx_bd_base;
-	QUICC_BD			*rx_cur;
-	QUICC_BD			*tx_bd_base;
-	QUICC_BD			*tx_cur;
-} ser_info_t;
-
-
-/* since kmalloc_init() does not get called until much after this initialization: */
-static ser_info_t  quicc_ser_info[NR_PORTS];
-static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE];
-static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE];
-
-static void change_speed(ser_info_t *info);
-static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout);
-
-static inline int serial_paranoia_check(ser_info_t *info,
-					char *name, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
-	static const char *badmagic =
-		"Warning: bad magic number for serial struct (%s) in %s\n";
-	static const char *badinfo =
-		"Warning: null async_struct for (%s) in %s\n";
-
-	if (!info) {
-		printk(badinfo, name, routine);
-		return 1;
-	}
-	if (info->magic != SERIAL_MAGIC) {
-		printk(badmagic, name, routine);
-		return 1;
-	}
-#endif
-	return 0;
-}
-
-/*
- * This is used to figure out the divisor speeds and the timeouts,
- * indexed by the termio value.  The generic CPM functions are responsible
- * for setting and assigning baud rate generators for us.
- */
-static int baud_table[] = {
-	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
-	9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
-
-/* This sucks. There is a better way: */
-#if defined(CONFIG_CONSOLE_9600)
-  #define CONSOLE_BAUDRATE 9600
-#elif defined(CONFIG_CONSOLE_19200)
-  #define CONSOLE_BAUDRATE 19200
-#elif defined(CONFIG_CONSOLE_115200)
-  #define CONSOLE_BAUDRATE 115200
-#else
-  #warning "console baud rate undefined"
-  #define CONSOLE_BAUDRATE 9600
-#endif
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_360_stop(struct tty_struct *tty)
-{
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-	int	idx;
-	unsigned long flags;
- 	volatile struct scc_regs *sccp;
- 	volatile struct smc_regs *smcp;
-
-	if (serial_paranoia_check(info, tty->name, "rs_stop"))
-		return;
-	
-	local_irq_save(flags);
-	idx = PORT_NUM(info->state->smc_scc_num);
-	if (info->state->smc_scc_num & NUM_IS_SCC) {
-		sccp = &pquicc->scc_regs[idx];
-		sccp->scc_sccm &= ~UART_SCCM_TX;
-	} else {
-		/* smcp = &cpmp->cp_smc[idx]; */
-		smcp = &pquicc->smc_regs[idx];
-		smcp->smc_smcm &= ~SMCM_TX;
-	}
-	local_irq_restore(flags);
-}
-
-
-static void rs_360_start(struct tty_struct *tty)
-{
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-	int	idx;
-	unsigned long flags;
-	volatile struct scc_regs *sccp;
-	volatile struct smc_regs *smcp;
-
-	if (serial_paranoia_check(info, tty->name, "rs_stop"))
-		return;
-	
-	local_irq_save(flags);
-	idx = PORT_NUM(info->state->smc_scc_num);
-	if (info->state->smc_scc_num & NUM_IS_SCC) {
-		sccp = &pquicc->scc_regs[idx];
-		sccp->scc_sccm |= UART_SCCM_TX;
-	} else {
-		smcp = &pquicc->smc_regs[idx];
-		smcp->smc_smcm |= SMCM_TX;
-	}
-	local_irq_restore(flags);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines.  All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt().  They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off.  People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible.  After you are done making modifications, it is not a bad
- * idea to do:
- * 
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * 				- Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-static _INLINE_ void receive_chars(ser_info_t *info)
-{
-	struct tty_struct *tty = info->port.tty;
-	unsigned char ch, flag, *cp;
-	/*int	ignored = 0;*/
-	int	i;
-	ushort	status;
-	 struct	async_icount *icount; 
-	/* struct	async_icount_24 *icount; */
-	volatile QUICC_BD	*bdp;
-
-	icount = &info->state->icount;
-
-	/* Just loop through the closed BDs and copy the characters into
-	 * the buffer.
-	 */
-	bdp = info->rx_cur;
-	for (;;) {
-		if (bdp->status & BD_SC_EMPTY)	/* If this one is empty */
-			break;			/*   we are all done */
-
-		/* The read status mask tell us what we should do with
-		 * incoming characters, especially if errors occur.
-		 * One special case is the use of BD_SC_EMPTY.  If
-		 * this is not set, we are supposed to be ignoring
-		 * inputs.  In this case, just mark the buffer empty and
-		 * continue.
-		 */
-		if (!(info->read_status_mask & BD_SC_EMPTY)) {
-			bdp->status |= BD_SC_EMPTY;
-			bdp->status &=
-				~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
-
-			if (bdp->status & BD_SC_WRAP)
-				bdp = info->rx_bd_base;
-			else
-				bdp++;
-			continue;
-		}
-
-		/* Get the number of characters and the buffer pointer.
-		*/
-		i = bdp->length;
-		/* cp = (unsigned char *)__va(bdp->buf); */
-		cp = (char *)bdp->buf;
-		status = bdp->status;
-
-		while (i-- > 0) {
-			ch = *cp++;
-			icount->rx++;
-
-#ifdef SERIAL_DEBUG_INTR
-			printk("DR%02x:%02x...", ch, status);
-#endif
-			flag = TTY_NORMAL;
-
-			if (status & (BD_SC_BR | BD_SC_FR |
-				       BD_SC_PR | BD_SC_OV)) {
-				/*
-				 * For statistics only
-				 */
-				if (status & BD_SC_BR)
-					icount->brk++;
-				else if (status & BD_SC_PR)
-					icount->parity++;
-				else if (status & BD_SC_FR)
-					icount->frame++;
-				if (status & BD_SC_OV)
-					icount->overrun++;
-
-				/*
-				 * Now check to see if character should be
-				 * ignored, and mask off conditions which
-				 * should be ignored.
-				if (status & info->ignore_status_mask) {
-					if (++ignored > 100)
-						break;
-					continue;
-				}
-				 */
-				status &= info->read_status_mask;
-		
-				if (status & (BD_SC_BR)) {
-#ifdef SERIAL_DEBUG_INTR
-					printk("handling break....");
-#endif
-					*tty->flip.flag_buf_ptr = TTY_BREAK;
-					if (info->flags & ASYNC_SAK)
-						do_SAK(tty);
-				} else if (status & BD_SC_PR)
-					flag = TTY_PARITY;
-				else if (status & BD_SC_FR)
-					flag = TTY_FRAME;
-			}
-			tty_insert_flip_char(tty, ch, flag);
-			if (status & BD_SC_OV)
-				/*
-				 * Overrun is special, since it's
-				 * reported immediately, and doesn't
-				 * affect the current character
-				 */
-				tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-		}
-
-		/* This BD is ready to be used again.  Clear status.
-		 * Get next BD.
-		 */
-		bdp->status |= BD_SC_EMPTY;
-		bdp->status &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
-
-		if (bdp->status & BD_SC_WRAP)
-			bdp = info->rx_bd_base;
-		else
-			bdp++;
-	}
-
-	info->rx_cur = (QUICC_BD *)bdp;
-
-	tty_schedule_flip(tty);
-}
-
-static _INLINE_ void receive_break(ser_info_t *info)
-{
-	struct tty_struct *tty = info->port.tty;
-
-	info->state->icount.brk++;
-	/* Check to see if there is room in the tty buffer for
-	 * the break.  If not, we exit now, losing the break.  FIXME
-	 */
-	tty_insert_flip_char(tty, 0, TTY_BREAK);
-	tty_schedule_flip(tty);
-}
-
-static _INLINE_ void transmit_chars(ser_info_t *info)
-{
-
-	if ((info->flags & TX_WAKEUP) ||
-	    (info->port.tty->flags & (1 << TTY_DO_WRITE_WAKEUP))) {
-		schedule_work(&info->tqueue);
-	}
-
-#ifdef SERIAL_DEBUG_INTR
-	printk("THRE...");
-#endif
-}
-
-#ifdef notdef
-	/* I need to do this for the SCCs, so it is left as a reminder.
-	*/
-static _INLINE_ void check_modem_status(struct async_struct *info)
-{
-	int	status;
-	/* struct	async_icount *icount; */
-	struct	async_icount_24 *icount;
-	
-	status = serial_in(info, UART_MSR);
-
-	if (status & UART_MSR_ANY_DELTA) {
-		icount = &info->state->icount;
-		/* update input line counters */
-		if (status & UART_MSR_TERI)
-			icount->rng++;
-		if (status & UART_MSR_DDSR)
-			icount->dsr++;
-		if (status & UART_MSR_DDCD) {
-			icount->dcd++;
-#ifdef CONFIG_HARD_PPS
-			if ((info->flags & ASYNC_HARDPPS_CD) &&
-			    (status & UART_MSR_DCD))
-				hardpps();
-#endif
-		}
-		if (status & UART_MSR_DCTS)
-			icount->cts++;
-		wake_up_interruptible(&info->delta_msr_wait);
-	}
-
-	if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
-#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
-		printk("ttys%d CD now %s...", info->line,
-		       (status & UART_MSR_DCD) ? "on" : "off");
-#endif		
-		if (status & UART_MSR_DCD)
-			wake_up_interruptible(&info->open_wait);
-		else {
-#ifdef SERIAL_DEBUG_OPEN
-			printk("scheduling hangup...");
-#endif
-			queue_task(&info->tqueue_hangup,
-					   &tq_scheduler);
-		}
-	}
-	if (info->flags & ASYNC_CTS_FLOW) {
-		if (info->port.tty->hw_stopped) {
-			if (status & UART_MSR_CTS) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
-				printk("CTS tx start...");
-#endif
-				info->port.tty->hw_stopped = 0;
-				info->IER |= UART_IER_THRI;
-				serial_out(info, UART_IER, info->IER);
-				rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-				return;
-			}
-		} else {
-			if (!(status & UART_MSR_CTS)) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
-				printk("CTS tx stop...");
-#endif
-				info->port.tty->hw_stopped = 1;
-				info->IER &= ~UART_IER_THRI;
-				serial_out(info, UART_IER, info->IER);
-			}
-		}
-	}
-}
-#endif
-
-/*
- * This is the serial driver's interrupt routine for a single port
- */
-/* static void rs_360_interrupt(void *dev_id) */ /* until and if we start servicing irqs here */
-static void rs_360_interrupt(int vec, void *dev_id)
-{
-	u_char	events;
-	int	idx;
-	ser_info_t *info;
-	volatile struct smc_regs *smcp;
-	volatile struct scc_regs *sccp;
-	
-	info = dev_id;
-
-	idx = PORT_NUM(info->state->smc_scc_num);
-	if (info->state->smc_scc_num & NUM_IS_SCC) {
-		sccp = &pquicc->scc_regs[idx];
-		events = sccp->scc_scce;
-		if (events & SCCM_RX)
-			receive_chars(info);
-		if (events & SCCM_TX)
-			transmit_chars(info);
-		sccp->scc_scce = events;
-	} else {
-		smcp = &pquicc->smc_regs[idx];
-		events = smcp->smc_smce;
-		if (events & SMCM_BRKE)
-			receive_break(info);
-		if (events & SMCM_RX)
-			receive_chars(info);
-		if (events & SMCM_TX)
-			transmit_chars(info);
-		smcp->smc_smce = events;
-	}
-	
-#ifdef SERIAL_DEBUG_INTR
-	printk("rs_interrupt_single(%d, %x)...",
-					info->state->smc_scc_num, events);
-#endif
-#ifdef modem_control
-	check_modem_status(info);
-#endif
-	info->last_active = jiffies;
-#ifdef SERIAL_DEBUG_INTR
-	printk("end.\n");
-#endif
-}
-
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-
-static void do_softint(void *private_)
-{
-	ser_info_t	*info = (ser_info_t *) private_;
-	struct tty_struct	*tty;
-	
-	tty = info->port.tty;
-	if (!tty)
-		return;
-
-	if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
-		tty_wakeup(tty);
-}
-
-
-/*
- * This routine is called from the scheduler tqueue when the interrupt
- * routine has signalled that a hangup has occurred.  The path of
- * hangup processing is:
- *
- * 	serial interrupt routine -> (scheduler tqueue) ->
- * 	do_serial_hangup() -> tty->hangup() -> rs_hangup()
- * 
- */
-static void do_serial_hangup(void *private_)
-{
-	struct async_struct	*info = (struct async_struct *) private_;
-	struct tty_struct	*tty;
-	
-	tty = info->port.tty;
-	if (!tty)
-		return;
-
-	tty_hangup(tty);
-}
-
-
-static int startup(ser_info_t *info)
-{
-	unsigned long flags;
-	int	retval=0;
-	int	idx;
-	/*struct serial_state *state = info->state;*/
-	volatile struct smc_regs *smcp;
-	volatile struct scc_regs *sccp;
-	volatile struct smc_uart_pram	*up;
-	volatile struct uart_pram	    *scup;
-
-
-	local_irq_save(flags);
-
-	if (info->flags & ASYNC_INITIALIZED) {
-		goto errout;
-	}
-
-#ifdef maybe
-	if (!state->port || !state->type) {
-		if (info->port.tty)
-			set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-		goto errout;
-	}
-#endif
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("starting up ttys%d (irq %d)...", info->line, state->irq);
-#endif
-
-
-#ifdef modem_control
-	info->MCR = 0;
-	if (info->port.tty->termios->c_cflag & CBAUD)
-		info->MCR = UART_MCR_DTR | UART_MCR_RTS;
-#endif
-	
-	if (info->port.tty)
-		clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
-	/*
-	 * and set the speed of the serial port
-	 */
-	change_speed(info);
-
-	idx = PORT_NUM(info->state->smc_scc_num);
-	if (info->state->smc_scc_num & NUM_IS_SCC) {
-		sccp = &pquicc->scc_regs[idx];
-		scup = &pquicc->pram[info->state->port].scc.pscc.u;
-
-		scup->mrblr = RX_BUF_SIZE;
-		scup->max_idl = RX_BUF_SIZE;
-
-		sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX);
-		sccp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
-	} else {
-		smcp = &pquicc->smc_regs[idx];
-
-		/* Enable interrupts and I/O.
-		*/
-		smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
-		smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN);
-
-		/* We can tune the buffer length and idle characters
-		 * to take advantage of the entire incoming buffer size.
-		 * If mrblr is something other than 1, maxidl has to be
-		 * non-zero or we never get an interrupt.  The maxidl
-		 * is the number of character times we wait after reception
-		 * of the last character before we decide no more characters
-		 * are coming.
-		 */
-		/* up = (smc_uart_t *)&pquicc->cp_dparam[state->port]; */
-		/* holy unionized structures, Batman: */
-		up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
-
-		up->mrblr = RX_BUF_SIZE;
-		up->max_idl = RX_BUF_SIZE;
-
-		up->brkcr = 1;	/* number of break chars */
-	}
-
-	info->flags |= ASYNC_INITIALIZED;
-	local_irq_restore(flags);
-	return 0;
-	
-errout:
-	local_irq_restore(flags);
-	return retval;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(ser_info_t *info)
-{
-	unsigned long	flags;
-	struct serial_state *state;
-	int		idx;
-	volatile struct smc_regs	*smcp;
-	volatile struct scc_regs	*sccp;
-
-	if (!(info->flags & ASYNC_INITIALIZED))
-		return;
-
-	state = info->state;
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("Shutting down serial port %d (irq %d)....", info->line,
-	       state->irq);
-#endif
-	
-	local_irq_save(flags);
-
-	idx = PORT_NUM(state->smc_scc_num);
-	if (state->smc_scc_num & NUM_IS_SCC) {
-		sccp = &pquicc->scc_regs[idx];
-		sccp->scc_gsmr.w.low &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-#ifdef CONFIG_SERIAL_CONSOLE
-		/* We can't disable the transmitter if this is the
-		 * system console.
-		 */
-		if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
-#endif
-		sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
-	} else {
-		smcp = &pquicc->smc_regs[idx];
-
-		/* Disable interrupts and I/O.
-		 */
-		smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
-#ifdef CONFIG_SERIAL_CONSOLE
-		/* We can't disable the transmitter if this is the
-		 * system console.
-		 */
-		if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
-#endif
-			smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
-	}
-	
-	if (info->port.tty)
-		set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
-	info->flags &= ~ASYNC_INITIALIZED;
-	local_irq_restore(flags);
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(ser_info_t *info)
-{
-	int	baud_rate;
-	unsigned cflag, cval, scval, prev_mode;
-	int	i, bits, sbits, idx;
-	unsigned long	flags;
-	struct serial_state *state;
-	volatile struct smc_regs	*smcp;
-	volatile struct scc_regs	*sccp;
-
-	if (!info->port.tty || !info->port.tty->termios)
-		return;
-	cflag = info->port.tty->termios->c_cflag;
-
-	state = info->state;
-
-	/* Character length programmed into the mode register is the
-	 * sum of: 1 start bit, number of data bits, 0 or 1 parity bit,
-	 * 1 or 2 stop bits, minus 1.
-	 * The value 'bits' counts this for us.
-	 */
-	cval = 0;
-	scval = 0;
-
-	/* byte size and parity */
-	switch (cflag & CSIZE) {
-	      case CS5: bits = 5; break;
-	      case CS6: bits = 6; break;
-	      case CS7: bits = 7; break;
-	      case CS8: bits = 8; break;
-	      /* Never happens, but GCC is too dumb to figure it out */
-	      default:  bits = 8; break;
-	}
-	sbits = bits - 5;
-
-	if (cflag & CSTOPB) {
-		cval |= SMCMR_SL;	/* Two stops */
-		scval |= SCU_PMSR_SL;
-		bits++;
-	}
-	if (cflag & PARENB) {
-		cval |= SMCMR_PEN;
-		scval |= SCU_PMSR_PEN;
-		bits++;
-	}
-	if (!(cflag & PARODD)) {
-		cval |= SMCMR_PM_EVEN;
-		scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP);
-	}
-
-	/* Determine divisor based on baud rate */
-	i = cflag & CBAUD;
-	if (i >= (sizeof(baud_table)/sizeof(int)))
-		baud_rate = 9600;
-	else
-		baud_rate = baud_table[i];
-
-	info->timeout = (TX_BUF_SIZE*HZ*bits);
-	info->timeout += HZ/50;		/* Add .02 seconds of slop */
-
-#ifdef modem_control
-	/* CTS flow control flag and modem status interrupts */
-	info->IER &= ~UART_IER_MSI;
-	if (info->flags & ASYNC_HARDPPS_CD)
-		info->IER |= UART_IER_MSI;
-	if (cflag & CRTSCTS) {
-		info->flags |= ASYNC_CTS_FLOW;
-		info->IER |= UART_IER_MSI;
-	} else
-		info->flags &= ~ASYNC_CTS_FLOW;
-	if (cflag & CLOCAL)
-		info->flags &= ~ASYNC_CHECK_CD;
-	else {
-		info->flags |= ASYNC_CHECK_CD;
-		info->IER |= UART_IER_MSI;
-	}
-	serial_out(info, UART_IER, info->IER);
-#endif
-
-	/*
-	 * Set up parity check flag
-	 */
-	info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV);
-	if (I_INPCK(info->port.tty))
-		info->read_status_mask |= BD_SC_FR | BD_SC_PR;
-	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
-		info->read_status_mask |= BD_SC_BR;
-	
-	/*
-	 * Characters to ignore
-	 */
-	info->ignore_status_mask = 0;
-	if (I_IGNPAR(info->port.tty))
-		info->ignore_status_mask |= BD_SC_PR | BD_SC_FR;
-	if (I_IGNBRK(info->port.tty)) {
-		info->ignore_status_mask |= BD_SC_BR;
-		/*
-		 * If we're ignore parity and break indicators, ignore 
-		 * overruns too.  (For real raw support).
-		 */
-		if (I_IGNPAR(info->port.tty))
-			info->ignore_status_mask |= BD_SC_OV;
-	}
-	/*
-	 * !!! ignore all characters if CREAD is not set
-	 */
-	if ((cflag & CREAD) == 0)
-	 info->read_status_mask &= ~BD_SC_EMPTY;
-	 local_irq_save(flags);
-
-	 /* Start bit has not been added (so don't, because we would just
-	  * subtract it later), and we need to add one for the number of
-	  * stops bits (there is always at least one).
-	  */
-	 bits++;
-	 idx = PORT_NUM(state->smc_scc_num);
-	 if (state->smc_scc_num & NUM_IS_SCC) {
-         sccp = &pquicc->scc_regs[idx];
-         sccp->scc_psmr = (sbits << 12) | scval;
-     } else {
-         smcp = &pquicc->smc_regs[idx];
-
-		/* Set the mode register.  We want to keep a copy of the
-		 * enables, because we want to put them back if they were
-		 * present.
-		 */
-		prev_mode = smcp->smc_smcmr;
-		smcp->smc_smcmr = smcr_mk_clen(bits) | cval |  SMCMR_SM_UART;
-		smcp->smc_smcmr |= (prev_mode & (SMCMR_REN | SMCMR_TEN));
-	}
-
-	m360_cpm_setbrg((state - rs_table), baud_rate);
-
-	local_irq_restore(flags);
-}
-
-static void rs_360_put_char(struct tty_struct *tty, unsigned char ch)
-{
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-	volatile QUICC_BD	*bdp;
-
-	if (serial_paranoia_check(info, tty->name, "rs_put_char"))
-		return 0;
-
-	if (!tty)
-		return 0;
-
-	bdp = info->tx_cur;
-	while (bdp->status & BD_SC_READY);
-
-	/* *((char *)__va(bdp->buf)) = ch; */
-	*((char *)bdp->buf) = ch;
-	bdp->length = 1;
-	bdp->status |= BD_SC_READY;
-
-	/* Get next BD.
-	*/
-	if (bdp->status & BD_SC_WRAP)
-		bdp = info->tx_bd_base;
-	else
-		bdp++;
-
-	info->tx_cur = (QUICC_BD *)bdp;
-	return 1;
-
-}
-
-static int rs_360_write(struct tty_struct * tty,
-		    const unsigned char *buf, int count)
-{
-	int	c, ret = 0;
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-	volatile QUICC_BD *bdp;
-
-#ifdef CONFIG_KGDB
-	/* Try to let stub handle output. Returns true if it did. */ 
-	if (kgdb_output_string(buf, count))
-		return ret;
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_write"))
-		return 0;
-
-	if (!tty) 
-		return 0;
-
-	bdp = info->tx_cur;
-
-	while (1) {
-		c = min(count, TX_BUF_SIZE);
-
-		if (c <= 0)
-			break;
-
-		if (bdp->status & BD_SC_READY) {
-			info->flags |= TX_WAKEUP;
-			break;
-		}
-
-		/* memcpy(__va(bdp->buf), buf, c); */
-		memcpy((void *)bdp->buf, buf, c);
-
-		bdp->length = c;
-		bdp->status |= BD_SC_READY;
-
-		buf += c;
-		count -= c;
-		ret += c;
-
-		/* Get next BD.
-		*/
-		if (bdp->status & BD_SC_WRAP)
-			bdp = info->tx_bd_base;
-		else
-			bdp++;
-		info->tx_cur = (QUICC_BD *)bdp;
-	}
-	return ret;
-}
-
-static int rs_360_write_room(struct tty_struct *tty)
-{
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-	int	ret;
-
-	if (serial_paranoia_check(info, tty->name, "rs_write_room"))
-		return 0;
-
-	if ((info->tx_cur->status & BD_SC_READY) == 0) {
-		info->flags &= ~TX_WAKEUP;
-		ret = TX_BUF_SIZE;
-	}
-	else {
-		info->flags |= TX_WAKEUP;
-		ret = 0;
-	}
-	return ret;
-}
-
-/* I could track this with transmit counters....maybe later.
-*/
-static int rs_360_chars_in_buffer(struct tty_struct *tty)
-{
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-				
-	if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
-		return 0;
-	return 0;
-}
-
-static void rs_360_flush_buffer(struct tty_struct *tty)
-{
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-				
-	if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
-		return;
-
-	/* There is nothing to "flush", whatever we gave the CPM
-	 * is on its way out.
-	 */
-	tty_wakeup(tty);
-	info->flags &= ~TX_WAKEUP;
-}
-
-/*
- * This function is used to send a high-priority XON/XOFF character to
- * the device
- */
-static void rs_360_send_xchar(struct tty_struct *tty, char ch)
-{
-	volatile QUICC_BD	*bdp;
-
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "rs_send_char"))
-		return;
-
-	bdp = info->tx_cur;
-	while (bdp->status & BD_SC_READY);
-
-	/* *((char *)__va(bdp->buf)) = ch; */
-	*((char *)bdp->buf) = ch;
-	bdp->length = 1;
-	bdp->status |= BD_SC_READY;
-
-	/* Get next BD.
-	*/
-	if (bdp->status & BD_SC_WRAP)
-		bdp = info->tx_bd_base;
-	else
-		bdp++;
-
-	info->tx_cur = (QUICC_BD *)bdp;
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- * 
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void rs_360_throttle(struct tty_struct * tty)
-{
-	ser_info_t *info = (ser_info_t *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-	
-	printk("throttle %s: %d....\n", _tty_name(tty, buf),
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_throttle"))
-		retu