From 92988a21ad4c4c9504295ccb580c9f806134471b Mon Sep 17 00:00:00 2001
From: "H. Nikolaus Schaller" <hns@goldelico.com>
Date: Mon, 26 Mar 2012 20:55:28 +0200
Subject: added boot script files to repository

---
 u-boot/board/goldelico/gta04/gps.c | 136 +++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 u-boot/board/goldelico/gta04/gps.c

(limited to 'u-boot/board/goldelico/gta04/gps.c')

diff --git a/u-boot/board/goldelico/gta04/gps.c b/u-boot/board/goldelico/gta04/gps.c
new file mode 100644
index 0000000..7f74dc8
--- /dev/null
+++ b/u-boot/board/goldelico/gta04/gps.c
@@ -0,0 +1,136 @@
+/* u-boot driver for the GTA04 LEDs and Buttons
+ *
+ * Copyright (C) 2010 by Golden Delicious Computers GmbH&Co. KG
+ * Author: H. Nikolaus Schaller <hns@goldelico.com>
+ * All rights reserved.
+ *
+ * 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/errno.h>
+#include <asm/io.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/gpio.h>
+#include <asm/mach-types.h>
+#include <ns16550.h>
+#include <twl4030.h>
+#include "gps.h"
+
+#ifdef CONFIG_OMAP3_GTA04
+
+#define GPIO_GPSEXT		144		// external GPS antenna plugged in
+#define GPIO_GPS_ON		145		// reset for GPS module
+
+#else /* Beagle Hybrid */
+
+#define GPIO_GPSEXT		138		// external GPS antenna plugged in
+#define GPIO_GPS_ON		156
+
+#endif
+
+int gps_init(void)
+{
+	extern int get_board_revision(void);
+#define REVISION_XM 0
+	if(get_board_revision() == REVISION_XM) {
+		/* Set VAUX1 to 3.3V for GTA04E display board */
+		twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX1_DEDICATED,
+							/*TWL4030_PM_RECEIVER_VAUX1_VSEL_33*/ 0x07,
+							TWL4030_PM_RECEIVER_VAUX1_DEV_GRP,
+							TWL4030_PM_RECEIVER_DEV_GRP_P1);
+		udelay(5000);
+	}
+#ifdef CONFIG_OMAP3_GTA04
+	/* ext. GPS Ant VSIM = 2.8 V (3.0V) */
+	twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VSIM_DEDICATED,
+							/*TWL4030_PM_RECEIVER_VSIM_VSEL_28*/ 0x04 /* 0x05 */,
+							TWL4030_PM_RECEIVER_VSIM_DEV_GRP,
+							TWL4030_PM_RECEIVER_DEV_GRP_P1);
+	udelay(5000);
+#endif
+	
+	omap_request_gpio(GPIO_GPS_ON);
+	omap_set_gpio_direction(GPIO_GPS_ON, 0);		// output
+	omap_request_gpio(GPIO_GPSEXT);
+	omap_set_gpio_direction(GPIO_GPSEXT, 1);		// input
+	return 0;
+}
+
+void gps_on(void)
+{
+	omap_set_gpio_dataout(GPIO_GPS_ON, 1);
+	if(omap_get_gpio_datain(GPIO_GPSEXT))
+		printf("external antenna\n");
+	else
+		printf("internal antenna\n");
+}
+
+void gps_off(void)
+{
+	omap_set_gpio_dataout(GPIO_GPS_ON, 0);
+}
+
+static int lastant=-1;
+static long timer;
+
+#define TIMEOUT 2	// in seconds
+
+void gps_echo(void)
+{
+	#define MODE_X_DIV 16
+	int baudrate=9600;
+	int divisor=(CONFIG_SYS_NS16550_CLK + (baudrate * (MODE_X_DIV / 2))) / (MODE_X_DIV * baudrate);
+	NS16550_reinit((NS16550_t)CONFIG_SYS_NS16550_COM2, divisor);	// initialize UART
+	while (1)
+		{ // echo in both directions
+			int ant=omap_get_gpio_datain(GPIO_GPSEXT);
+			if(ant != lastant)
+				{ // changed
+					if(ant)
+						printf("external antenna\n");
+					else
+						printf("internal antenna\n");
+					lastant=ant;
+				}
+			if(NS16550_tstc((NS16550_t)CONFIG_SYS_NS16550_COM2))
+				{
+				putc(NS16550_getc((NS16550_t)CONFIG_SYS_NS16550_COM2));	// from GPS to console
+				timer=0;	// data received
+				}
+			if(tstc())
+				{
+				int c=getc();
+				if(c == 0x03)	// ctrl-C
+					break;
+				// NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM2, c);
+				break;
+				}
+			if(timer++ > 2*10000)
+				{ // timeout - try to wakeup/reset the chip
+					printf("no data: on-off impulse\n");
+					omap_set_gpio_dataout(GPIO_GPS_ON, 1);
+					udelay(5000);
+					omap_set_gpio_dataout(GPIO_GPS_ON, 1);
+					timer=0;
+				}
+			udelay(100);	// 10 kHz @ 9 kbit/s
+		}
+	printf("\n");
+}
+
-- 
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