From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Rix Date: Wed, 1 Apr 2009 11:11:11 -0500 Subject: [U-Boot] [PATCH] ZOOM2 Add support for debug board detection. In-Reply-To: <1238602273-27252-2-git-send-email-Tom.Rix@windriver.com> References: <1238602273-27252-1-git-send-email-Tom.Rix@windriver.com> <1238602273-27252-2-git-send-email-Tom.Rix@windriver.com> Message-ID: <1238602273-27252-3-git-send-email-Tom.Rix@windriver.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 --- board/omap3/zoom2/Makefile | 3 +- board/omap3/zoom2/debug_board.c | 55 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+), 1 deletions(-) create mode 100644 board/omap3/zoom2/debug_board.c diff --git a/board/omap3/zoom2/Makefile b/board/omap3/zoom2/Makefile index 088b8cb..b8fa5a7 100644 --- a/board/omap3/zoom2/Makefile +++ b/board/omap3/zoom2/Makefile @@ -25,7 +25,8 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(BOARD).a -COBJS := zoom2.o +COBJS := zoom2.o \ + debug_board.o SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/board/omap3/zoom2/debug_board.c b/board/omap3/zoom2/debug_board.c new file mode 100644 index 0000000..a3043b7 --- /dev/null +++ b/board/omap3/zoom2/debug_board.c @@ -0,0 +1,55 @@ +/* + * (C) Copyright 2009 + * Windriver, + * Tom Rix + * + * 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 +#include +#include +#include + +#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) +{ + unsigned int val; + /* GPIO to query for debug board + 158 db board query, bank 5, index 30 */ + gpio_t *gpio5_base = (gpio_t *)OMAP34XX_GPIO5_BASE; + + val = __raw_readl(&gpio5_base->datain); + + /* Check the bit for gpio 158 */ + if (!(val & (1 << 30))) + 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; +} -- 1.6.0.5