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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>
#if defined(__mips__) || defined (__i386__) || defined (__x86_64__)
#include <grub/cpu/io.h>
#endif
#include <grub/usb.h>
#include <grub/list.h>
#include <grub/term.h>
#ifdef GRUB_MACHINE_IEEE1275
#include <grub/ieee1275/ieee1275.h>
#endif
#ifdef GRUB_MACHINE_ARC
#include <grub/arc/arc.h>
#endif
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_1_5,
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;
grub_uint64_t base_clock;
int rtscts;
};
struct grub_serial_port
{
struct grub_serial_port *next;
struct grub_serial_port **prev;
char *name;
struct grub_serial_driver *driver;
struct grub_serial_config config;
int configured;
int broken;
/* 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
{
bool use_mmio;
union
{
#if defined(__mips__) || defined (__i386__) || defined (__x86_64__)
grub_port_t port;
#endif
struct
{
grub_addr_t base;
/* Access size uses ACPI definition */
grub_uint8_t access_size;
} mmio;
};
};
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;
};
struct grub_escc_descriptor *escc_desc;
#ifdef GRUB_MACHINE_IEEE1275
struct
{
grub_ieee1275_ihandle_t handle;
struct ofserial_hash_ent *elem;
};
#endif
#ifdef GRUB_MACHINE_EFI
struct grub_efi_serial_io_interface *interface;
#endif
#ifdef GRUB_MACHINE_ARC
struct
{
grub_arc_fileno_t handle;
int handle_valid;
};
#endif
};
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);
/* Convenience functions to perform primitive operations on a port. */
static inline grub_err_t
grub_serial_port_configure (struct grub_serial_port *port,
struct grub_serial_config *config)
{
return port->driver->configure (port, config);
}
static inline int
grub_serial_port_fetch (struct grub_serial_port *port)
{
return port->driver->fetch (port);
}
static inline void
grub_serial_port_put (struct grub_serial_port *port, const int c)
{
port->driver->put (port, c);
}
static inline void
grub_serial_port_fini (struct grub_serial_port *port)
{
port->driver->fini (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_LOONGSON
.speed = 115200,
/* On Loongson machines serial port has only 3 wires. */
.rtscts = 0,
#else
.speed = 9600,
.rtscts = 1,
#endif
.word_len = 8,
.parity = GRUB_SERIAL_PARITY_NONE,
.stop_bits = GRUB_SERIAL_STOP_BITS_1,
.base_clock = 0
};
return port->driver->configure (port, &config);
}
#if defined(__mips__) || defined (__i386__) || defined (__x86_64__)
void grub_ns8250_init (void);
struct grub_serial_port *grub_ns8250_spcr_init (void);
struct grub_serial_port *grub_serial_ns8250_add_port (grub_port_t port,
struct grub_serial_config *config);
struct grub_serial_port *grub_serial_ns8250_add_mmio (grub_addr_t addr,
unsigned int acc_size,
struct grub_serial_config *config);
#endif
#ifdef GRUB_MACHINE_IEEE1275
void grub_ofserial_init (void);
#endif
#ifdef GRUB_MACHINE_EFI
void
grub_efiserial_init (void);
#endif
#ifdef GRUB_MACHINE_ARC
void
grub_arcserial_init (void);
struct grub_serial_port *grub_arcserial_add_port (const char *path);
#endif
#if defined(__i386__) || defined(__x86_64__)
extern void grub_pciserial_init (void);
#endif
struct grub_serial_port *grub_serial_find (const char *name);
extern struct grub_serial_driver grub_ns8250_driver;
void EXPORT_FUNC(grub_serial_unregister_driver) (struct grub_serial_driver *driver);
#ifndef GRUB_MACHINE_EMU
extern void grub_serial_init (void);
extern void grub_serial_fini (void);
#endif
extern struct grub_serial_port *grub_serial_ports;
#define FOR_SERIAL_PORTS(var) FOR_LIST_ELEMENTS((var), (grub_serial_ports))
#endif
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