Linux-2.6.12-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 */