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/*
* dump.c - Raw dump of EC register, stolen from ibm_acpi.c
*
*
* Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "omnibook.h"
#include "hardware.h"
static u8 ecdump_regs[256];
static int ecdump_read(char *buffer, struct omnibook_operation *io_op)
{
int len = 0;
int i, j;
u8 v;
len +=
sprintf(buffer + len,
"EC " " +00 +01 +02 +03 +04 +05 +06 +07"
" +08 +09 +0a +0b +0c +0d +0e +0f\n");
if(mutex_lock_interruptible(&io_op->backend->mutex))
return -ERESTARTSYS;
for (i = 0; i < 255; i += 16) {
len += sprintf(buffer + len, "EC 0x%02x:", i);
for (j = 0; j < 16; j++) {
io_op->read_addr = i +j;
if (__backend_byte_read(io_op, &v))
break;
if (v != ecdump_regs[i + j])
len += sprintf(buffer + len, " *%02x", v);
else
len += sprintf(buffer + len, " %02x", v);
ecdump_regs[i + j] = v;
}
len += sprintf(buffer + len, "\n");
if (j != 16)
break;
}
mutex_unlock(&io_op->backend->mutex);
/* These are way too dangerous to advertise openly... */
#if 0
len +=
sprintf(buffer + len,
"commands:\t0x<offset> 0x<value>" " (<offset> is 00-ff, <value> is 00-ff)\n");
len +=
sprintf(buffer + len,
"commands:\t0x<offset> <value> " " (<offset> is 00-ff, <value> is 0-255)\n");
#endif
return len;
}
static int ecdump_write(char *buffer, struct omnibook_operation *io_op)
{
int i, v;
if (sscanf(buffer, "0x%x 0x%x", &i, &v) == 2) {
/* i and v set */
} else if (sscanf(buffer, "0x%x %u", &i, &v) == 2) {
/* i and v set */
} else
return -EINVAL;
if (i >= 0 && i < 256 && v >= 0 && v < 256) {
io_op->write_addr = i;
return backend_byte_write(io_op, v);
} else
return -EINVAL;
return 0;
}
static struct omnibook_tbl dump_table[] __initdata = {
{ALL_ECTYPES, {EC,}},
{0,}
};
static struct omnibook_feature __declared_feature dump_driver = {
.name = "dump",
.enabled = 0,
.read = ecdump_read,
.write = ecdump_write,
.tbl = dump_table,
};
module_param_named(dump, dump_driver.enabled, int, S_IRUGO);
MODULE_PARM_DESC(dump, "Use 0 to disable, 1 to enable embedded controller register dump support");
/* End of file */
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