added boot script files to repository

1 files changed, 181 insertions, 0 deletions

diff --git a/u-boot/board/goldelico/gta04/tsc2007.c b/u-boot/board/goldelico/gta04/tsc2007.c
new file mode 100644
index 0000000..b2a0cfa
--- /dev/null
+++ b/u-boot/board/goldelico/gta04/tsc2007.c
@@ -0,0 +1,181 @@
+/* u-boot driver for the TSC2007 connected to I2C2
+ *
+ * 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 <i2c.h>
+#include "tsc2007.h"
+
+#define TSC2007_BUS 2	// I2C2
+#define TSC2007_ADDRESS 0x48
+
+// command byte definitions:
+// channel selection and power down
+
+#define TSC2007_TEMP0	0x00
+#define TSC2007_AUX		0x20
+#define TSC2007_TEMP1	0x40
+#define TSC2007_ACTX	0x80
+#define TSC2007_ACTY	0x90
+#define TSC2007_ACTXY	0xA0
+#define TSC2007_X		0xc0
+#define TSC2007_Y		0xd0
+#define TSC2007_Z1		0xe0
+#define TSC2007_Z2		0xf0
+
+#define TSC2007_POWER_DOWN		0x00	// must be sent once after power up
+#define TSC2007_ADC_ON			0x04
+#define TSC2007_ADC_OFF_PENIRQ	0x08
+
+#define TSC2007_12Bit2MHz		0x00
+#define TSC2007_8Bit4MHz		0x02
+
+// setup command
+
+#define TSC2007_SETUP		0xb0
+
+#define TSC2007_USE_MAV		0x00
+#define TSC2007_BYPASS_MAV	0x02
+
+#define TSC2007_50kPUP		0x00
+#define TSC2007_90kPUP		0x01
+
+/*
+ int i2c_read(u_int8_t chip, u_int32_t addr, int alen, u_int8_t *buf, int len)
+ int i2c_write(u_int8_t chip, u_int32_t addr, int alen, u_int8_t *buf, int len)
+*/
+
+static int didNotInit=1;
+
+int tsc2007_cmd(int cmd)
+{ // send command
+	unsigned char buf[16];
+	buf[0]=cmd;
+	if (i2c_write(TSC2007_ADDRESS, cmd, 1, buf, 0))	// write 1 byte command
+		{
+			printf ("Error writing the TSC.\n");
+			return 1;
+		}
+	return 0;
+}
+
+int tsc2007_init(void)
+{
+	if(i2c_set_bus_num(TSC2007_BUS-1))
+		{
+			printf ("could not select I2C2\n");
+			return 1;
+		}
+	
+	if(i2c_probe(TSC2007_ADDRESS))
+		{
+		printf ("could not probe TSC2007\n");
+		return 1;		
+		}
+	
+	didNotInit = tsc2007_cmd(TSC2007_SETUP|TSC2007_USE_MAV|TSC2007_50kPUP);
+	didNotInit |= tsc2007_cmd(TSC2007_POWER_DOWN);
+	
+	if(didNotInit)
+		printf("did tsc2007_init() failed.\n");
+	else
+		printf("did tsc2007_init()\n");
+
+	return 0;
+}
+
+int read_adc(int adcnum)
+{ // read ADC and return value in range 0..4095
+	unsigned char c;
+	unsigned char buf[16];
+	static int cmd[]={ 
+		TSC2007_X,
+		TSC2007_Y,
+		TSC2007_Z1,
+		TSC2007_Z2,
+		TSC2007_TEMP0,
+		TSC2007_TEMP1,
+		TSC2007_AUX,
+		TSC2007_AUX
+	};
+	if(didNotInit)
+		return -1;
+	if(i2c_get_bus_num() != TSC2007_BUS-1 && i2c_set_bus_num(TSC2007_BUS-1))
+		{
+		printf ("could not select I2C2\n");
+		return -1;
+		}
+	c=cmd[adcnum%8] | TSC2007_ADC_ON | TSC2007_12Bit2MHz;
+//	printf("send %02x\n", c);
+	if (i2c_read(TSC2007_ADDRESS, c, 1, buf, 1))
+		{
+			printf ("Error reading the TSC.\n");
+			return -1;
+		}
+	return ((unsigned)buf[0]) << 4;	// read 1 byte only
+	
+//	return (buf[0]<<4)+(buf[1]>>4);	// 12 bit
+}
+
+void print_adc(void)
+{
+	printf("0:%04u 1:%04u 2:%04u 3:%04u 4:%04u 5:%04u 6:%04u 7:%04u",
+		   read_adc(0),
+		   read_adc(1),
+		   read_adc(2),
+		   read_adc(3),
+		   read_adc(4),
+		   read_adc(5),
+		   read_adc(6),
+		   read_adc(7));
+}
+
+int pendown(int *x, int *y)
+{
+#if 1
+	int z;
+	int xx;
+	int yy;
+	xx=read_adc(0);
+	yy=read_adc(1);
+	z=read_adc(2);	// read Z
+	if(z < 0)
+		return 0;	// read error
+#if 0
+	printf("z=%04d x:%04d y:%04d\n", z, xx, yy);
+#endif
+	if(x) *x=xx;
+	if(y) *y=yy;
+	udelay(10000);	// reduce I2C traffic and debounce...
+	return z > 200;	// was pressed
+#else
+	// must be in PENIRQ mode...
+	return (status_get_buttons() & (1 << 4)) == 0;
+#endif
+}
+