261 lines
6 KiB
C
261 lines
6 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2012 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>
|
|
|
|
#define IEEE1275_IHANDLE_INVALID ((grub_ieee1275_cell_t) 0)
|
|
|
|
struct ofserial_hash_ent
|
|
{
|
|
char *devpath;
|
|
/* Pointer to shortest available name on nodes representing canonical names,
|
|
otherwise NULL. */
|
|
const char *shortest;
|
|
struct ofserial_hash_ent *next;
|
|
};
|
|
|
|
static void
|
|
do_real_config (struct grub_serial_port *port)
|
|
{
|
|
if (port->configured)
|
|
return;
|
|
|
|
if (grub_ieee1275_open (port->elem->devpath, &port->handle)
|
|
|| port->handle == (grub_ieee1275_ihandle_t) -1)
|
|
port->handle = IEEE1275_IHANDLE_INVALID;
|
|
|
|
port->configured = 1;
|
|
}
|
|
|
|
/* Fetch a key. */
|
|
static int
|
|
serial_hw_fetch (struct grub_serial_port *port)
|
|
{
|
|
grub_ssize_t actual;
|
|
char c;
|
|
|
|
do_real_config (port);
|
|
|
|
if (port->handle == IEEE1275_IHANDLE_INVALID)
|
|
return -1;
|
|
grub_ieee1275_read (port->handle, &c, 1, &actual);
|
|
|
|
if (actual <= 0)
|
|
return -1;
|
|
return c;
|
|
}
|
|
|
|
/* Put a character. */
|
|
static void
|
|
serial_hw_put (struct grub_serial_port *port, const int c)
|
|
{
|
|
grub_ssize_t actual;
|
|
char c0 = c;
|
|
|
|
do_real_config (port);
|
|
|
|
if (port->handle == IEEE1275_IHANDLE_INVALID)
|
|
return;
|
|
|
|
grub_ieee1275_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 IEEE1275 serial config available. */
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
struct grub_serial_driver grub_ofserial_driver =
|
|
{
|
|
.configure = serial_hw_configure,
|
|
.fetch = serial_hw_fetch,
|
|
.put = serial_hw_put
|
|
};
|
|
|
|
#define OFSERIAL_HASH_SZ 8
|
|
static struct ofserial_hash_ent *ofserial_hash[OFSERIAL_HASH_SZ];
|
|
|
|
static int
|
|
ofserial_hash_fn (const char *devpath)
|
|
{
|
|
int hash = 0;
|
|
while (*devpath)
|
|
hash ^= *devpath++;
|
|
return (hash & (OFSERIAL_HASH_SZ - 1));
|
|
}
|
|
|
|
static struct ofserial_hash_ent *
|
|
ofserial_hash_find (const char *devpath)
|
|
{
|
|
struct ofserial_hash_ent *p = ofserial_hash[ofserial_hash_fn(devpath)];
|
|
|
|
while (p)
|
|
{
|
|
if (!grub_strcmp (p->devpath, devpath))
|
|
break;
|
|
p = p->next;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static struct ofserial_hash_ent *
|
|
ofserial_hash_add_real (char *devpath)
|
|
{
|
|
struct ofserial_hash_ent *p;
|
|
struct ofserial_hash_ent **head = &ofserial_hash[ofserial_hash_fn(devpath)];
|
|
|
|
p = grub_malloc(sizeof (*p));
|
|
if (!p)
|
|
return NULL;
|
|
|
|
p->devpath = devpath;
|
|
p->next = *head;
|
|
p->shortest = 0;
|
|
*head = p;
|
|
return p;
|
|
}
|
|
|
|
static struct ofserial_hash_ent *
|
|
ofserial_hash_add (char *devpath, char *curcan)
|
|
{
|
|
struct ofserial_hash_ent *p, *pcan;
|
|
|
|
p = ofserial_hash_add_real (devpath);
|
|
|
|
grub_dprintf ("serial", "devpath = %s, canonical = %s\n", devpath, curcan);
|
|
|
|
if (!curcan)
|
|
{
|
|
p->shortest = devpath;
|
|
return p;
|
|
}
|
|
|
|
pcan = ofserial_hash_find (curcan);
|
|
if (!pcan)
|
|
pcan = ofserial_hash_add_real (curcan);
|
|
else
|
|
grub_free (curcan);
|
|
|
|
if (!pcan)
|
|
grub_errno = GRUB_ERR_NONE;
|
|
else
|
|
{
|
|
if (!pcan->shortest
|
|
|| grub_strlen (pcan->shortest) > grub_strlen (devpath))
|
|
pcan->shortest = devpath;
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
static void
|
|
dev_iterate_real (struct grub_ieee1275_devalias *alias,
|
|
int use_name)
|
|
{
|
|
struct ofserial_hash_ent *op;
|
|
|
|
if (grub_strcmp (alias->type, "serial") != 0)
|
|
return;
|
|
|
|
grub_dprintf ("serial", "serial name = %s, path = %s\n", alias->name,
|
|
alias->path);
|
|
|
|
op = ofserial_hash_find (alias->path);
|
|
if (!op)
|
|
{
|
|
char *name = grub_strdup (use_name ? alias->name : alias->path);
|
|
char *can = grub_strdup (alias->path);
|
|
if (!name || !can)
|
|
{
|
|
grub_errno = GRUB_ERR_NONE;
|
|
grub_free (name);
|
|
grub_free (can);
|
|
return;
|
|
}
|
|
op = ofserial_hash_add (name, can);
|
|
}
|
|
return;
|
|
}
|
|
|
|
static int
|
|
dev_iterate (struct grub_ieee1275_devalias *alias)
|
|
{
|
|
dev_iterate_real (alias, 0);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
grub_ofserial_init (void)
|
|
{
|
|
unsigned i;
|
|
grub_err_t err;
|
|
struct grub_ieee1275_devalias alias;
|
|
|
|
FOR_IEEE1275_DEVALIASES(alias)
|
|
dev_iterate_real (&alias, 1);
|
|
|
|
grub_ieee1275_devices_iterate (dev_iterate);
|
|
|
|
for (i = 0; i < ARRAY_SIZE (ofserial_hash); i++)
|
|
{
|
|
static struct ofserial_hash_ent *ent;
|
|
for (ent = ofserial_hash[i]; ent; ent = ent->next)
|
|
{
|
|
struct grub_serial_port *port;
|
|
char *ptr;
|
|
if (!ent->shortest)
|
|
continue;
|
|
|
|
port = grub_zalloc (sizeof (*port));
|
|
if (!port)
|
|
return;
|
|
port->name = grub_malloc (sizeof ("ieee1275/")
|
|
+ grub_strlen (ent->shortest));
|
|
port->elem = ent;
|
|
if (!port->name)
|
|
return;
|
|
ptr = grub_stpcpy (port->name, "ieee1275/");
|
|
grub_strcpy (ptr, ent->shortest);
|
|
|
|
port->driver = &grub_ofserial_driver;
|
|
err = grub_serial_config_defaults (port);
|
|
if (err)
|
|
grub_print_error ();
|
|
|
|
grub_serial_register (port);
|
|
}
|
|
}
|
|
}
|
|
|