Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 491 insertions, 0 deletions

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
new file mode 100644
index 000000000000..c3fb5984f250
--- /dev/null
+++ b/include/linux/serial_core.h
@@ -0,0 +1,491 @@
+/*
+ *  linux/drivers/char/serial_core.h
+ *
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef LINUX_SERIAL_CORE_H
+#define LINUX_SERIAL_CORE_H
+
+/*
+ * The type definitions.  These are from Ted Ts'o's serial.h
+ */
+#define PORT_UNKNOWN	0
+#define PORT_8250	1
+#define PORT_16450	2
+#define PORT_16550	3
+#define PORT_16550A	4
+#define PORT_CIRRUS	5
+#define PORT_16650	6
+#define PORT_16650V2	7
+#define PORT_16750	8
+#define PORT_STARTECH	9
+#define PORT_16C950	10
+#define PORT_16654	11
+#define PORT_16850	12
+#define PORT_RSA	13
+#define PORT_NS16550A	14
+#define PORT_XSCALE	15
+#define PORT_MAX_8250	15	/* max port ID */
+
+/*
+ * ARM specific type numbers.  These are not currently guaranteed
+ * to be implemented, and will change in the future.  These are
+ * separate so any additions to the old serial.c that occur before
+ * we are merged can be easily merged here.
+ */
+#define PORT_PXA	31
+#define PORT_AMBA	32
+#define PORT_CLPS711X	33
+#define PORT_SA1100	34
+#define PORT_UART00	35
+#define PORT_21285	37
+
+/* Sparc type numbers.  */
+#define PORT_SUNZILOG	38
+#define PORT_SUNSAB	39
+
+/* NEC v850.  */
+#define PORT_V850E_UART	40
+
+/* DZ */
+#define PORT_DZ		47
+
+/* Parisc type numbers. */
+#define PORT_MUX	48
+
+/* Macintosh Zilog type numbers */
+#define PORT_MAC_ZILOG	50	/* m68k : not yet implemented */
+#define PORT_PMAC_ZILOG	51
+
+/* SH-SCI */
+#define PORT_SCI	52
+#define PORT_SCIF	53
+#define PORT_IRDA	54
+
+/* Samsung S3C2410 SoC and derivatives thereof */
+#define PORT_S3C2410    55
+
+/* SGI IP22 aka Indy / Challenge S / Indigo 2 */
+#define PORT_IP22ZILOG	56
+
+/* Sharp LH7a40x -- an ARM9 SoC series */
+#define PORT_LH7A40X	57
+
+/* PPC CPM type number */
+#define PORT_CPM        58
+
+/* MPC52xx type numbers */
+#define PORT_MPC52xx	59
+
+/* IBM icom */
+#define PORT_ICOM	60
+
+/* Samsung S3C2440 SoC */
+#define PORT_S3C2440	61
+
+/* Motorola i.MX SoC */
+#define PORT_IMX	62
+
+/* Marvell MPSC */
+#define PORT_MPSC	63
+
+/* TXX9 type number */
+#define PORT_TXX9       64
+
+/* NEC VR4100 series SIU/DSIU */
+#define PORT_VR41XX_SIU		65
+#define PORT_VR41XX_DSIU	66
+
+/* Samsung S3C2400 SoC */
+#define PORT_S3C2400	67
+
+/* M32R SIO */
+#define PORT_M32R_SIO	68
+
+/*Digi jsm */
+#define PORT_JSM        65
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/circ_buf.h>
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/tty.h>
+
+struct uart_port;
+struct uart_info;
+struct serial_struct;
+struct device;
+
+/*
+ * This structure describes all the operations that can be
+ * done on the physical hardware.
+ */
+struct uart_ops {
+	unsigned int	(*tx_empty)(struct uart_port *);
+	void		(*set_mctrl)(struct uart_port *, unsigned int mctrl);
+	unsigned int	(*get_mctrl)(struct uart_port *);
+	void		(*stop_tx)(struct uart_port *, unsigned int tty_stop);
+	void		(*start_tx)(struct uart_port *, unsigned int tty_start);
+	void		(*send_xchar)(struct uart_port *, char ch);
+	void		(*stop_rx)(struct uart_port *);
+	void		(*enable_ms)(struct uart_port *);
+	void		(*break_ctl)(struct uart_port *, int ctl);
+	int		(*startup)(struct uart_port *);
+	void		(*shutdown)(struct uart_port *);
+	void		(*set_termios)(struct uart_port *, struct termios *new,
+				       struct termios *old);
+	void		(*pm)(struct uart_port *, unsigned int state,
+			      unsigned int oldstate);
+	int		(*set_wake)(struct uart_port *, unsigned int state);
+
+	/*
+	 * Return a string describing the type of the port
+	 */
+	const char *(*type)(struct uart_port *);
+
+	/*
+	 * Release IO and memory resources used by the port.
+	 * This includes iounmap if necessary.
+	 */
+	void		(*release_port)(struct uart_port *);
+
+	/*
+	 * Request IO and memory resources used by the port.
+	 * This includes iomapping the port if necessary.
+	 */
+	int		(*request_port)(struct uart_port *);
+	void		(*config_port)(struct uart_port *, int);
+	int		(*verify_port)(struct uart_port *, struct serial_struct *);
+	int		(*ioctl)(struct uart_port *, unsigned int, unsigned long);
+};
+
+#define UART_CONFIG_TYPE	(1 << 0)
+#define UART_CONFIG_IRQ		(1 << 1)
+
+struct uart_icount {
+	__u32	cts;
+	__u32	dsr;
+	__u32	rng;
+	__u32	dcd;
+	__u32	rx;
+	__u32	tx;
+	__u32	frame;
+	__u32	overrun;
+	__u32	parity;
+	__u32	brk;
+	__u32	buf_overrun;
+};
+
+struct uart_port {
+	spinlock_t		lock;			/* port lock */
+	unsigned int		iobase;			/* in/out[bwl] */
+	unsigned char __iomem	*membase;		/* read/write[bwl] */
+	unsigned int		irq;			/* irq number */
+	unsigned int		uartclk;		/* base uart clock */
+	unsigned char		fifosize;		/* tx fifo size */
+	unsigned char		x_char;			/* xon/xoff char */
+	unsigned char		regshift;		/* reg offset shift */
+	unsigned char		iotype;			/* io access style */
+
+#define UPIO_PORT		(0)
+#define UPIO_HUB6		(1)
+#define UPIO_MEM		(2)
+#define UPIO_MEM32		(3)
+
+	unsigned int		read_status_mask;	/* driver specific */
+	unsigned int		ignore_status_mask;	/* driver specific */
+	struct uart_info	*info;			/* pointer to parent info */
+	struct uart_icount	icount;			/* statistics */
+
+	struct console		*cons;			/* struct console, if any */
+#ifdef CONFIG_SERIAL_CORE_CONSOLE
+	unsigned long		sysrq;			/* sysrq timeout */
+#endif
+
+	unsigned int		flags;
+
+#define UPF_FOURPORT		(1 << 1)
+#define UPF_SAK			(1 << 2)
+#define UPF_SPD_MASK		(0x1030)
+#define UPF_SPD_HI		(0x0010)
+#define UPF_SPD_VHI		(0x0020)
+#define UPF_SPD_CUST		(0x0030)
+#define UPF_SPD_SHI		(0x1000)
+#define UPF_SPD_WARP		(0x1010)
+#define UPF_SKIP_TEST		(1 << 6)
+#define UPF_AUTO_IRQ		(1 << 7)
+#define UPF_HARDPPS_CD		(1 << 11)
+#define UPF_LOW_LATENCY		(1 << 13)
+#define UPF_BUGGY_UART		(1 << 14)
+#define UPF_AUTOPROBE		(1 << 15)
+#define UPF_MAGIC_MULTIPLIER	(1 << 16)
+#define UPF_BOOT_ONLYMCA	(1 << 22)
+#define UPF_CONS_FLOW		(1 << 23)
+#define UPF_SHARE_IRQ		(1 << 24)
+#define UPF_BOOT_AUTOCONF	(1 << 28)
+#define UPF_IOREMAP		(1 << 31)
+
+#define UPF_CHANGE_MASK		(0x17fff)
+#define UPF_USR_MASK		(UPF_SPD_MASK|UPF_LOW_LATENCY)
+
+	unsigned int		mctrl;			/* current modem ctrl settings */
+	unsigned int		timeout;		/* character-based timeout */
+	unsigned int		type;			/* port type */
+	struct uart_ops		*ops;
+	unsigned int		custom_divisor;
+	unsigned int		line;			/* port index */
+	unsigned long		mapbase;		/* for ioremap */
+	struct device		*dev;			/* parent device */
+	unsigned char		hub6;			/* this should be in the 8250 driver */
+	unsigned char		unused[3];
+};
+
+/*
+ * This is the state information which is persistent across opens.
+ * The low level driver must not to touch any elements contained
+ * within.
+ */
+struct uart_state {
+	unsigned int		close_delay;		/* msec */
+	unsigned int		closing_wait;		/* msec */
+
+#define USF_CLOSING_WAIT_INF	(0)
+#define USF_CLOSING_WAIT_NONE	(~0U)
+
+	int			count;
+	int			pm_state;
+	struct uart_info	*info;
+	struct uart_port	*port;
+
+	struct semaphore	sem;
+};
+
+#define UART_XMIT_SIZE	PAGE_SIZE
+/*
+ * This is the state information which is only valid when the port
+ * is open; it may be freed by the core driver once the device has
+ * been closed.  Either the low level driver or the core can modify
+ * stuff here.
+ */
+struct uart_info {
+	struct tty_struct	*tty;
+	struct circ_buf		xmit;
+	unsigned int		flags;
+
+/*
+ * These are the flags that specific to info->flags, and reflect our
+ * internal state.  They can not be accessed via port->flags.  Low
+ * level drivers must not change these, but may query them instead.
+ */
+#define UIF_CHECK_CD		(1 << 25)
+#define UIF_CTS_FLOW		(1 << 26)
+#define UIF_NORMAL_ACTIVE	(1 << 29)
+#define UIF_INITIALIZED		(1 << 31)
+
+	int			blocked_open;
+
+	struct tasklet_struct	tlet;
+
+	wait_queue_head_t	open_wait;
+	wait_queue_head_t	delta_msr_wait;
+};
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS		256
+
+struct module;
+struct tty_driver;
+
+struct uart_driver {
+	struct module		*owner;
+	const char		*driver_name;
+	const char		*dev_name;
+	const char		*devfs_name;
+	int			 major;
+	int			 minor;
+	int			 nr;
+	struct console		*cons;
+
+	/*
+	 * these are private; the low level driver should not
+	 * touch these; they should be initialised to NULL
+	 */
+	struct uart_state	*state;
+	struct tty_driver	*tty_driver;
+};
+
+void uart_write_wakeup(struct uart_port *port);
+
+/*
+ * Baud rate helpers.
+ */
+void uart_update_timeout(struct uart_port *port, unsigned int cflag,
+			 unsigned int baud);
+unsigned int uart_get_baud_rate(struct uart_port *port, struct termios *termios,
+				struct termios *old, unsigned int min,
+				unsigned int max);
+unsigned int uart_get_divisor(struct uart_port *port, unsigned int baud);
+
+/*
+ * Console helpers.
+ */
+struct uart_port *uart_get_console(struct uart_port *ports, int nr,
+				   struct console *c);
+void uart_parse_options(char *options, int *baud, int *parity, int *bits,
+			int *flow);
+int uart_set_options(struct uart_port *port, struct console *co, int baud,
+		     int parity, int bits, int flow);
+struct tty_driver *uart_console_device(struct console *co, int *index);
+
+/*
+ * Port/driver registration/removal
+ */
+int uart_register_driver(struct uart_driver *uart);
+void uart_unregister_driver(struct uart_driver *uart);
+void uart_unregister_port(struct uart_driver *reg, int line);
+int uart_register_port(struct uart_driver *reg, struct uart_port *port);
+int uart_add_one_port(struct uart_driver *reg, struct uart_port *port);
+int uart_remove_one_port(struct uart_driver *reg, struct uart_port *port);
+int uart_match_port(struct uart_port *port1, struct uart_port *port2);
+
+/*
+ * Power Management
+ */
+int uart_suspend_port(struct uart_driver *reg, struct uart_port *port);
+int uart_resume_port(struct uart_driver *reg, struct uart_port *port);
+
+#define uart_circ_empty(circ)		((circ)->head == (circ)->tail)
+#define uart_circ_clear(circ)		((circ)->head = (circ)->tail = 0)
+
+#define uart_circ_chars_pending(circ)	\
+	(CIRC_CNT((circ)->head, (circ)->tail, UART_XMIT_SIZE))
+
+#define uart_circ_chars_free(circ)	\
+	(CIRC_SPACE((circ)->head, (circ)->tail, UART_XMIT_SIZE))
+
+#define uart_tx_stopped(port)		\
+	((port)->info->tty->stopped || (port)->info->tty->hw_stopped)
+
+/*
+ * The following are helper functions for the low level drivers.
+ */
+#ifdef SUPPORT_SYSRQ
+static inline int
+uart_handle_sysrq_char(struct uart_port *port, unsigned int ch,
+		       struct pt_regs *regs)
+{
+	if (port->sysrq) {
+		if (ch && time_before(jiffies, port->sysrq)) {
+			handle_sysrq(ch, regs, NULL);
+			port->sysrq = 0;
+			return 1;
+		}
+		port->sysrq = 0;
+	}
+	return 0;
+}
+#else
+#define uart_handle_sysrq_char(port,ch,regs)	(0)
+#endif
+
+/*
+ * We do the SysRQ and SAK checking like this...
+ */
+static inline int uart_handle_break(struct uart_port *port)
+{
+	struct uart_info *info = port->info;
+#ifdef SUPPORT_SYSRQ
+	if (port->cons && port->cons->index == port->line) {
+		if (!port->sysrq) {
+			port->sysrq = jiffies + HZ*5;
+			return 1;
+		}
+		port->sysrq = 0;
+	}
+#endif
+	if (info->flags & UPF_SAK)
+		do_SAK(info->tty);
+	return 0;
+}
+
+/**
+ *	uart_handle_dcd_change - handle a change of carrier detect state
+ *	@port: uart_port structure for the open port
+ *	@status: new carrier detect status, nonzero if active
+ */
+static inline void
+uart_handle_dcd_change(struct uart_port *port, unsigned int status)
+{
+	struct uart_info *info = port->info;
+
+	port->icount.dcd++;
+
+#ifdef CONFIG_HARD_PPS
+	if ((port->flags & UPF_HARDPPS_CD) && status)
+		hardpps();
+#endif
+
+	if (info->flags & UIF_CHECK_CD) {
+		if (status)
+			wake_up_interruptible(&info->open_wait);
+		else if (info->tty)
+			tty_hangup(info->tty);
+	}
+}
+
+/**
+ *	uart_handle_cts_change - handle a change of clear-to-send state
+ *	@port: uart_port structure for the open port
+ *	@status: new clear to send status, nonzero if active
+ */
+static inline void
+uart_handle_cts_change(struct uart_port *port, unsigned int status)
+{
+	struct uart_info *info = port->info;
+	struct tty_struct *tty = info->tty;
+
+	port->icount.cts++;
+
+	if (info->flags & UIF_CTS_FLOW) {
+		if (tty->hw_stopped) {
+			if (status) {
+				tty->hw_stopped = 0;
+				port->ops->start_tx(port, 0);
+				uart_write_wakeup(port);
+			}
+		} else {
+			if (!status) {
+				tty->hw_stopped = 1;
+				port->ops->stop_tx(port, 0);
+			}
+		}
+	}
+}
+
+/*
+ *	UART_ENABLE_MS - determine if port should enable modem status irqs
+ */
+#define UART_ENABLE_MS(port,cflag)	((port)->flags & UPF_HARDPPS_CD || \
+					 (cflag) & CRTSCTS || \
+					 !((cflag) & CLOCAL))
+
+#endif
+
+#endif /* LINUX_SERIAL_CORE_H */