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Restructure serial in order to prepare for usbserial. As a byproduct simultaneous serial consoles are possible

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-07-18 01:37:19 +02:00
parent 03f286ea9f
commit 75eb7d1116
10 changed files with 733 additions and 295 deletions
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100
include/grub/serial.h
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@ -1,7 +1,7 @@
/* serial.h - serial device interface */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000,2001,2002,2005,2007 Free Software Foundation, Inc.
* Copyright (C) 2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -20,30 +20,51 @@
#ifndef GRUB_SERIAL_HEADER
#define GRUB_SERIAL_HEADER 1
/* Macros. */
#include <grub/types.h>
#include <grub/cpu/io.h>
#include <grub/usb.h>
#include <grub/list.h>
/* The offsets of UART registers. */
#define UART_TX 0
#define UART_RX 0
#define UART_DLL 0
#define UART_IER 1
#define UART_DLH 1
#define UART_IIR 2
#define UART_FCR 2
#define UART_LCR 3
#define UART_MCR 4
#define UART_LSR 5
#define UART_MSR 6
#define UART_SR 7
struct grub_serial_port;
/* For LSR bits. */
#define UART_DATA_READY 0x01
#define UART_EMPTY_TRANSMITTER 0x20
struct grub_serial_driver
{
grub_err_t (*configure) (struct grub_serial_port *port,
unsigned speed,
unsigned short word_len,
unsigned int parity,
unsigned short stop_bits);
int (*fetch) (struct grub_serial_port *port);
void (*put) (struct grub_serial_port *port, const int c);
};
/* The type of parity. */
#define UART_NO_PARITY 0x00
#define UART_ODD_PARITY 0x08
#define UART_EVEN_PARITY 0x18
struct grub_serial_port
{
struct grub_serial_port *next;
char *name;
unsigned speed;
unsigned short word_len;
unsigned int parity;
unsigned short stop_bits;
struct grub_serial_driver *driver;
/* This should be void *data but since serial is useful as an early console
when malloc isn't available it's a union.
*/
union
{
grub_port_t port;
struct
{
grub_usb_device_t dev;
int in_endp;
int out_endp;
};
};
};
grub_err_t grub_serial_register (struct grub_serial_port *port);
void grub_serial_unregister (struct grub_serial_port *port);
/* The type of word length. */
#define UART_5BITS_WORD 0x00
@ -51,23 +72,30 @@
#define UART_7BITS_WORD 0x02
#define UART_8BITS_WORD 0x03
/* The type of parity. */
#define UART_NO_PARITY 0x00
#define UART_ODD_PARITY 0x08
#define UART_EVEN_PARITY 0x18
/* The type of the length of stop bit. */
#define UART_1_STOP_BIT 0x00
#define UART_2_STOP_BITS 0x04
/* the switch of DLAB. */
#define UART_DLAB 0x80
static inline void
grub_serial_fill_defaults (struct grub_serial_port *port)
{
/* Set default settings. */
#ifdef GRUB_MACHINE_MIPS_YEELOONG
port->speed = 115200;
#else
port->speed = 9600;
#endif
port->word_len = UART_8BITS_WORD;
port->parity = UART_NO_PARITY;
port->stop_bits = UART_1_STOP_BIT;
}
/* Enable the FIFO. */
#define UART_ENABLE_FIFO_TRIGGER14 0xC7
void grub_ns8250_init (void);
char *grub_serial_ns8250_add_port (grub_port_t port);
/* Enable the FIFO. */
#define UART_ENABLE_FIFO_TRIGGER1 0x07
/* Turn on DTR, RTS, and OUT2. */
#define UART_ENABLE_DTRRTS 0x03
/* Turn on DTR, RTS, and OUT2. */
#define UART_ENABLE_OUT2 0x08
#endif /* ! GRUB_SERIAL_MACHINE_HEADER */
#endif