http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/serial_core.h

/* * 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 /* Atmel AT91RM9200 SoC */ #define PORT_AT91RM9200 49 /* 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 69 #define PORT_IP3106 70 /* Hilscher netx */ #define PORT_NETX 71 #ifdef __KERNEL__ #include <linux/config.h> #include <linux/compiler.h> #include <linux/interrupt.h> #include <linux/circ_buf.h> #include <linux/spinlock.h> #include <linux/sched.h> #include <linux/tty.h> #include <linux/mutex.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 *); void (*start_tx)(struct uart_port *); 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; }; typedef unsigned int __bitwise__ upf_t; 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) #define UPIO_AU (4) /* Au1x00 type IO */ 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 upf_t flags; #define UPF_FOURPORT ((__force upf_t) (1 << 1)) #define UPF_SAK ((__force upf_t) (1 << 2)) #define UPF_SPD_MASK ((__force upf_t) (0x1030)) #define UPF_SPD_HI ((__force upf_t) (0x0010)) #define UPF_SPD_VHI ((__force upf_t) (0x0020)) #define UPF_SPD_CUST ((__force upf_t) (0x0030)) #define UPF_SPD_SHI ((__force upf_t) (0x1000)) #define UPF_SPD_WARP ((__force upf_t) (0x1010)) #define UPF_SKIP_TEST ((__force upf_t) (1 << 6)) #define UPF_AUTO_IRQ ((__force upf_t) (1 << 7)) #define UPF_HARDPPS_CD ((__force upf_t) (1 << 11)) #define UPF_LOW_LATENCY ((__force upf_t) (1 << 13)) #define UPF_BUGGY_UART ((__force upf_t) (1 << 14)) #define UPF_MAGIC_MULTIPLIER ((__force upf_t) (1 << 16)) #define UPF_CONS_FLOW ((__force upf_t) (1 << 23)) #define UPF_SHARE_IRQ ((__force upf_t) (1 << 24)) #define UPF_BOOT_AUTOCONF ((__force upf_t) (1 << 28)) #define UPF_IOREMAP ((__force upf_t) (1 << 31)) #define UPF_CHANGE_MASK ((__force upf_t) (0x17fff)) #define UPF_USR_MASK ((__force upf_t) (UPF_SPD_MASK|UPF_LOW_LATENCY)) unsigned int mctrl; /* current modem ctrl settings */ unsigned int timeout; /* character-based timeout */ unsigned int type; /* port type */ const 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 mutex mutex; }; #define UART_XMIT_SIZE PAGE_SIZE typedef unsigned int __bitwise__ uif_t; /* * 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; uif_t flags; /* * Definitions for info->flags. These are _private_ to serial_core, and * are specific to this structure. They may be queried by low level drivers. */ #define UIF_CHECK_CD ((__force uif_t) (1 << 25)) #define UIF_CTS_FLOW ((__force uif_t) (1 << 26)) #define UIF_NORMAL_ACTIVE ((__force uif_t) (1 << 29)) #define UIF_INITIALIZED ((__force uif_t) (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); 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. */ static inline int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch, struct pt_regs *regs) { #ifdef SUPPORT_SYSRQ if (port->sysrq) { if (ch && time_before(jiffies, port->sysrq)) { handle_sysrq(ch, regs, NULL); port->sysrq = 0; return 1; } port->sysrq = 0; } #endif return 0; } #ifndef SUPPORT_SYSRQ #define uart_handle_sysrq_char(port,ch,regs) uart_handle_sysrq_char(port, 0, NULL) #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 (port->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); uart_write_wakeup(port); } } else { if (!status) { tty->hw_stopped = 1; port->ops->stop_tx(port); } } } } #include <linux/tty_flip.h> static inline void uart_insert_char(struct uart_port *port, unsigned int status, unsigned int overrun, unsigned int ch, unsigned int flag) { struct tty_struct *tty = port->info->tty; if ((status & port->ignore_status_mask & ~overrun) == 0) tty_insert_flip_char(tty, ch, flag); /* * Overrun is special. Since it's reported immediately, * it doesn't affect the current character. */ if (status & ~port->ignore_status_mask & overrun) tty_insert_flip_char(tty, 0, TTY_OVERRUN); } /* * 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 */