From: Aldo Brett Cedillo Martinez aldo.cedillo@ti.com
Signed-off-by: Aldo Brett Cedillo Martinez aldo.cedillo@ti.com --- board/logicpd/zoom3/debug_board.c | 66 +++++++++++++++++++++++++++++++++++++ 1 files changed, 66 insertions(+), 0 deletions(-) create mode 100644 board/logicpd/zoom3/debug_board.c
diff --git a/board/logicpd/zoom3/debug_board.c b/board/logicpd/zoom3/debug_board.c new file mode 100644 index 0000000..0520257 --- /dev/null +++ b/board/logicpd/zoom3/debug_board.c @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2010 Wind River Systems, Inc. + * Tom Rix Tom.Rix@windriver.com + * Aldo Cedillo aldo.cedillo@ti.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 zoom3_debug_board_detect(void) +{ + int val = 0; + + /* + * TODO gpio 158 is UART1_RX, should we make a macro of this + * instead of the raw number? + */ + 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 zoom3_debug_board_connected(void) +{ + static int first_time = 1; + + if (first_time) { + zoom3_debug_board_detect(); + first_time = 0; + } + + return debug_board_connected; +}