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Release 4.14 include/linux/serial_8250.h

Directory: include/linux
/*
 *  linux/include/linux/serial_8250.h
 *
 *  Copyright (C) 2004 Russell King
 *
 * 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.
 */
#ifndef _LINUX_SERIAL_8250_H

#define _LINUX_SERIAL_8250_H

#include <linux/serial_core.h>
#include <linux/serial_reg.h>
#include <linux/platform_device.h>

/*
 * This is the platform device platform_data structure
 */

struct plat_serial8250_port {
	
unsigned long	iobase;		/* io base address */
	
void __iomem	*membase;	/* ioremap cookie or NULL */
	
resource_size_t	mapbase;	/* resource base */
	
unsigned int	irq;		/* interrupt number */
	
unsigned long	irqflags;	/* request_irq flags */
	
unsigned int	uartclk;	/* UART clock rate */
	
void            *private_data;
	
unsigned char	regshift;	/* register shift */
	
unsigned char	iotype;		/* UPIO_* */
	
unsigned char	hub6;
	
upf_t		flags;		/* UPF_* flags */
	
unsigned int	type;		/* If UPF_FIXED_TYPE */
	
unsigned int	(*serial_in)(struct uart_port *, int);
	
void		(*serial_out)(struct uart_port *, int, int);
	
void		(*set_termios)(struct uart_port *,
			               struct ktermios *new,
			               struct ktermios *old);
	
void		(*set_ldisc)(struct uart_port *,
				     struct ktermios *);
	
unsigned int	(*get_mctrl)(struct uart_port *);
	
int		(*handle_irq)(struct uart_port *);
	
void		(*pm)(struct uart_port *, unsigned int state,
			      unsigned old);
	
void		(*handle_break)(struct uart_port *);
};

/*
 * Allocate 8250 platform device IDs.  Nothing is implied by
 * the numbering here, except for the legacy entry being -1.
 */
enum {
	
PLAT8250_DEV_LEGACY = -1,
	
PLAT8250_DEV_PLATFORM,
	
PLAT8250_DEV_PLATFORM1,
	
PLAT8250_DEV_PLATFORM2,
	
PLAT8250_DEV_FOURPORT,
	
PLAT8250_DEV_ACCENT,
	
PLAT8250_DEV_BOCA,
	
PLAT8250_DEV_EXAR_ST16C554,
	
PLAT8250_DEV_HUB6,
	
PLAT8250_DEV_AU1X00,
	
PLAT8250_DEV_SM501,
};

struct uart_8250_dma;
struct uart_8250_port;

/**
 * 8250 core driver operations
 *
 * @setup_irq()         Setup irq handling. The universal 8250 driver links this
 *                      port to the irq chain. Other drivers may @request_irq().
 * @release_irq()       Undo irq handling. The universal 8250 driver unlinks
 *                      the port from the irq chain.
 */

struct uart_8250_ops {
	
int		(*setup_irq)(struct uart_8250_port *);
	
void		(*release_irq)(struct uart_8250_port *);
};


struct uart_8250_em485 {
	
struct hrtimer		start_tx_timer; /* "rs485 start tx" timer */
	
struct hrtimer		stop_tx_timer;  /* "rs485 stop tx" timer */
	
struct hrtimer		*active_timer;  /* pointer to active timer */
	
struct uart_8250_port	*port;          /* for hrtimer callbacks */
};

/*
 * This should be used by drivers which want to register
 * their own 8250 ports without registering their own
 * platform device.  Using these will make your driver
 * dependent on the 8250 driver.
 */


struct uart_8250_port {
	
struct uart_port	port;
	
struct timer_list	timer;		/* "no irq" timer */
	
struct list_head	list;		/* ports on this IRQ */
	
u32			capabilities;	/* port capabilities */
	
unsigned short		bugs;		/* port bugs */
	
bool			fifo_bug;	/* min RX trigger if enabled */
	
unsigned int		tx_loadsz;	/* transmit fifo load size */
	
unsigned char		acr;
	
unsigned char		fcr;
	
unsigned char		ier;
	
unsigned char		lcr;
	
unsigned char		mcr;
	
unsigned char		mcr_mask;	/* mask of user bits */
	
unsigned char		mcr_force;	/* mask of forced bits */
	
unsigned char		cur_iotype;	/* Running I/O type */
	
unsigned int		rpm_tx_active;
	
unsigned char		canary;		/* non-zero during system sleep
                                                 *   if no_console_suspend
                                                 */
	
unsigned char		probe;

#define UART_PROBE_RSA	(1 << 0)

	/*
         * Some bits in registers are cleared on a read, so they must
         * be saved whenever the register is read but the bits will not
         * be immediately processed.
         */

#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
	
unsigned char		lsr_saved_flags;

#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
	
unsigned char		msr_saved_flags;

	
struct uart_8250_dma	*dma;
	
const struct uart_8250_ops *ops;

	/* 8250 specific callbacks */
	
int			(*dl_read)(struct uart_8250_port *);
	
void			(*dl_write)(struct uart_8250_port *, int);

	
struct uart_8250_em485 *em485;
};


static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up) { return container_of(up, struct uart_8250_port, port); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Shevchenko25100.00%1100.00%
Total25100.00%1100.00%

int serial8250_register_8250_port(struct uart_8250_port *); void serial8250_unregister_port(int line); void serial8250_suspend_port(int line); void serial8250_resume_port(int line); extern int early_serial_setup(struct uart_port *port); extern int early_serial8250_setup(struct earlycon_device *device, const char *options); extern void serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old); extern void serial8250_do_set_ldisc(struct uart_port *port, struct ktermios *termios); extern unsigned int serial8250_do_get_mctrl(struct uart_port *port); extern int serial8250_do_startup(struct uart_port *port); extern void serial8250_do_shutdown(struct uart_port *port); extern void serial8250_do_pm(struct uart_port *port, unsigned int state, unsigned int oldstate); extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl); extern int fsl8250_handle_irq(struct uart_port *port); int serial8250_handle_irq(struct uart_port *port, unsigned int iir); unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); void serial8250_tx_chars(struct uart_8250_port *up); unsigned int serial8250_modem_status(struct uart_8250_port *up); void serial8250_init_port(struct uart_8250_port *up); void serial8250_set_defaults(struct uart_8250_port *up); void serial8250_console_write(struct uart_8250_port *up, const char *s, unsigned int count); int serial8250_console_setup(struct uart_port *port, char *options, bool probe); extern void serial8250_set_isa_configurator(void (*v) (int port, struct uart_port *up, u32 *capabilities)); #endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Alan Cox12616.91%24.55%
Peter Hurley11615.57%511.36%
Russell King10914.63%613.64%
Paul Gortmaker445.91%24.55%
Philippe Langlais405.37%12.27%
Manuel Lauss364.83%12.27%
David Daney344.56%24.55%
Ed Blake324.30%24.55%
Andy Shevchenko253.36%12.27%
Sebastian Andrzej Siewior243.22%36.82%
Jamie Iles243.22%12.27%
Wan Ahmad Zainie233.09%12.27%
Matwey V. Kornilov233.09%12.27%
Eddie Huang152.01%12.27%
Dan J Williams111.48%12.27%
Yinghai Lu111.48%24.55%
Magnus Damm91.21%24.55%
Rafael Gago91.21%12.27%
Yoshihiro Yunomae81.07%12.27%
Heikki Krogerus81.07%12.27%
Vikram Pandita50.67%12.27%
Will Newton40.54%12.27%
Masahiro Yamada30.40%12.27%
Paul B Schroeder20.27%12.27%
Lennert Buytenhek20.27%12.27%
Pantelis Antoniou10.13%12.27%
Josh Boyer10.13%12.27%
Total745100.00%44100.00%
Directory: include/linux
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