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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 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/>.
*/
#include <grub/serial.h>
#include <grub/types.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/time.h>
#include <grub/i18n.h>
#include <grub/arc/arc.h>
static void
do_real_config (struct grub_serial_port *port)
{
char *name;
if (port->configured)
return;
name = grub_arc_alt_name_to_norm (port->name, "");
if (GRUB_ARC_FIRMWARE_VECTOR->open (name,GRUB_ARC_FILE_ACCESS_OPEN_RW,
&port->handle))
port->handle_valid = 0;
else
port->handle_valid = 1;
port->configured = 1;
}
/* Fetch a key. */
static int
serial_hw_fetch (struct grub_serial_port *port)
{
unsigned long actual;
char c;
do_real_config (port);
if (!port->handle_valid)
return -1;
if (GRUB_ARC_FIRMWARE_VECTOR->read (port->handle, &c,
1, &actual) || actual <= 0)
return -1;
return c;
}
/* Put a character. */
static void
serial_hw_put (struct grub_serial_port *port, const int c)
{
unsigned long actual;
char c0 = c;
do_real_config (port);
if (!port->handle_valid)
return;
GRUB_ARC_FIRMWARE_VECTOR->write (port->handle, &c0,
1, &actual);
}
/* Initialize a serial device. PORT is the port number for a serial device.
SPEED is a DTE-DTE speed which must be one of these: 2400, 4800, 9600,
19200, 38400, 57600 and 115200. WORD_LEN is the word length to be used
for the device. Likewise, PARITY is the type of the parity and
STOP_BIT_LEN is the length of the stop bit. The possible values for
WORD_LEN, PARITY and STOP_BIT_LEN are defined in the header file as
macros. */
static grub_err_t
serial_hw_configure (struct grub_serial_port *port __attribute__ ((unused)),
struct grub_serial_config *config __attribute__ ((unused)))
{
/* FIXME: no ARC serial config available. */
return GRUB_ERR_NONE;
}
struct grub_serial_driver grub_arcserial_driver =
{
.configure = serial_hw_configure,
.fetch = serial_hw_fetch,
.put = serial_hw_put
};
const char *
grub_arcserial_add_port (const char *path)
{
struct grub_serial_port *port;
grub_err_t err;
port = grub_zalloc (sizeof (*port));
if (!port)
return NULL;
port->name = grub_strdup (path);
if (!port->name)
return NULL;
port->driver = &grub_arcserial_driver;
err = grub_serial_config_defaults (port);
if (err)
grub_print_error ();
grub_serial_register (port);
return port->name;
}
static int
dev_iterate (const char *name,
const struct grub_arc_component *comp __attribute__ ((unused)),
void *data __attribute__ ((unused)))
{
/* We should check consolein/consoleout flags as
well but some implementations are buggy. */
if ((comp->flags & (GRUB_ARC_COMPONENT_FLAG_IN | GRUB_ARC_COMPONENT_FLAG_OUT))
!= (GRUB_ARC_COMPONENT_FLAG_IN | GRUB_ARC_COMPONENT_FLAG_OUT))
return 0;
if (!grub_arc_is_device_serial (name, 1))
return 0;
grub_arcserial_add_port (name);
return 0;
}
void
grub_arcserial_init (void)
{
grub_arc_iterate_devs (dev_iterate, 0, 1);
}
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