u-boot/board/omap3/zoom2/debug_board.c
Tom Rix de193e8e36 ZOOM2 Add support for debug board detection.
The logicpd web site is a good source for general information on this board.
Please start looking here if the below links are broken.
http://www.logicpd.com

This is a pdf of the product
http://www.logicpd.com/sites/default/files/1012659A_Zoom_OMAP34x-II_MDP_Brief.pdf

This is a pdf of the product quick start guide.
The debug board is described here.
http://support.logicpd.com/downloads/1165/

This is a wiki showing the debug board in use
https://omapzoom.org/gf/project/omapzoom/wiki/?pagename=GettingStartedWithZoomII_AKA_OMAP34XII_MDP

The zoom2 has an auxillary board that contains the serial, net, jtag and
battery simulator.  This change supports a runtime check if the debug board is
connected.

Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
2009-06-12 20:39:50 +02:00

59 lines
1.5 KiB
C

/*
* Copyright (c) 2009 Wind River Systems, Inc.
* Tom Rix <Tom.Rix@windriver.com>
*
* 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 <common.h>
#include <asm/arch/cpu.h>
#include <asm/io.h>
#include <asm/arch/mux.h>
#include <asm/arch/gpio.h>
#define DEBUG_BOARD_CONNECTED 1
#define DEBUG_BOARD_NOT_CONNECTED 0
static int debug_board_connected = DEBUG_BOARD_CONNECTED;
static void zoom2_debug_board_detect (void)
{
int val = 0;
if (!omap_request_gpio(158)) {
/*
* GPIO to query for debug board
* 158 db board query
*/
omap_set_gpio_direction(158, 1);
val = omap_get_gpio_datain(158);
omap_free_gpio(158);
}
if (!val)
debug_board_connected = DEBUG_BOARD_NOT_CONNECTED;
}
int zoom2_debug_board_connected (void)
{
static int first_time = 1;
if (first_time) {
zoom2_debug_board_detect ();
first_time = 0;
}
return debug_board_connected;
}