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/* serial.h - serial device interface */
/*
* GRUB -- GRand Unified Bootloader
* 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
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_SERIAL_HEADER
#define GRUB_SERIAL_HEADER 1
#include <grub/types.h>
#include <grub/cpu/io.h>
#include <grub/usb.h>
#include <grub/list.h>
#include <grub/term.h>
struct grub_serial_port;
struct grub_serial_config;
struct grub_serial_driver
{
grub_err_t (*configure) (struct grub_serial_port *port,
struct grub_serial_config *config);
int (*fetch) (struct grub_serial_port *port);
void (*put) (struct grub_serial_port *port, const int c);
void (*fini) (struct grub_serial_port *port);
};
/* The type of parity. */
typedef enum
{
GRUB_SERIAL_PARITY_NONE,
GRUB_SERIAL_PARITY_ODD,
GRUB_SERIAL_PARITY_EVEN,
} grub_serial_parity_t;
typedef enum
{
GRUB_SERIAL_STOP_BITS_1,
GRUB_SERIAL_STOP_BITS_2,
} grub_serial_stop_bits_t;
struct grub_serial_config
{
unsigned speed;
int word_len;
grub_serial_parity_t parity;
grub_serial_stop_bits_t stop_bits;
};
struct grub_serial_port
{
struct grub_serial_port *next;
char *name;
struct grub_serial_driver *driver;
struct grub_serial_config config;
int configured;
/* This should be void *data but since serial is useful as an early console
when malloc isn't available it's a union.
*/
union
{
struct
{
grub_port_t port;
int broken;
};
struct
{
grub_usb_device_t usbdev;
int configno;
int interfno;
char buf[64];
int bufstart, bufend;
struct grub_usb_desc_endp *in_endp;
struct grub_usb_desc_endp *out_endp;
};
};
grub_term_output_t term_out;
grub_term_input_t term_in;
};
grub_err_t EXPORT_FUNC(grub_serial_register) (struct grub_serial_port *port);
void EXPORT_FUNC(grub_serial_unregister) (struct grub_serial_port *port);
/* Set default settings. */
static inline grub_err_t
grub_serial_config_defaults (struct grub_serial_port *port)
{
struct grub_serial_config config =
{
#ifdef GRUB_MACHINE_MIPS_YEELOONG
.speed = 115200,
#else
.speed = 9600,
#endif
.word_len = 8,
.parity = GRUB_SERIAL_PARITY_NONE,
.stop_bits = GRUB_SERIAL_STOP_BITS_1
};
return port->driver->configure (port, &config);
}
void grub_ns8250_init (void);
char *grub_serial_ns8250_add_port (grub_port_t port);
extern struct grub_serial_driver grub_ns8250_driver;
void EXPORT_FUNC(grub_serial_unregister_driver) (struct grub_serial_driver *driver);
#endif
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