235dae5d09
UART Features extract from STEricsson U6715 data-sheet (arm926 SoC for mobile phone): * Fully compatible with industry standard 16C550 and 16C450 from various manufacturers * RX and TX 64 byte FIFO reduces CPU interrupts * Full double buffering * Modem control signals include CTS, RTS, (and DSR, DTR on UART1 only) * Automatic baud rate selection * Manual or automatic RTS/CTS smart hardware flow control * Programmable serial characteristics: – Baud rate generation (50 to 3.25M baud) – 5, 6, 7 or 8-bit characters – Even, odd or no-parity bit generation and detection – 1, 1.5 or 2 stop bit generation * Independent control of transmit, receive, line status, data set interrupts and FIFOs * Full status-reporting capabilities * Separate DMA signaling for RX and TX * Timed interrupt to spread receive interrupt on known duration * DMA time-out interrupt to allow detection of end of reception * Carkit pulse coding and decoding compliant with USB carkit control interface [40] In 16550A auto-configuration, if the fifo size is 64 then it's an U6 16550A port Add set_termios hook & export serial8250_do_set_termios to change uart clock following baudrate Signed-off-by: Philippe Langlais <philippe.langlais@stericsson.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
|
|
* 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/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);
|
|
};
|
|
|
|
/*
|
|
* 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_MCA,
|
|
PLAT8250_DEV_AU1X00,
|
|
PLAT8250_DEV_SM501,
|
|
};
|
|
|
|
/*
|
|
* 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_port;
|
|
|
|
int serial8250_register_port(struct uart_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 serial8250_find_port(struct uart_port *p);
|
|
extern int serial8250_find_port_for_earlycon(void);
|
|
extern int setup_early_serial8250_console(char *cmdline);
|
|
extern void serial8250_do_set_termios(struct uart_port *port,
|
|
struct ktermios *termios, struct ktermios *old);
|
|
|
|
#endif
|