From 94ffacdd9309745c8f04b512426bb6d810f5456a Mon Sep 17 00:00:00 2001
From: drath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Fri, 6 Oct 2006 15:46:25 +0000
Subject: - added support for American Microsystem's M5960 (FT2232 based USB
 JTAG interface) - added support for AT91SAM7A devices (thanks to Magnus
 Lundin) - updated README with pointer to Amontec's JTAGkeyTiny

git-svn-id: svn://svn.berlios.de/openocd/trunk@102 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 src/jtag/ft2232.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

(limited to 'src/jtag')

diff --git a/src/jtag/ft2232.c b/src/jtag/ft2232.c
index c1973a3c..6bb4be93 100644
--- a/src/jtag/ft2232.c
+++ b/src/jtag/ft2232.c
@@ -90,11 +90,13 @@ typedef struct ft2232_layout_s
 int usbjtag_init(void);
 int jtagkey_init(void);
 int olimex_jtag_init(void);
+int m5960_init(void);
 
 /* reset procedures for supported layouts */
 void usbjtag_reset(int trst, int srst);
 void jtagkey_reset(int trst, int srst);
 void olimex_jtag_reset(int trst, int srst);
+void m5960_reset(int trst, int srst);
 
 /* blink procedures for layouts that support a blinking led */
 void olimex_jtag_blink(void);
@@ -106,6 +108,7 @@ ft2232_layout_t ft2232_layouts[] =
 	{"jtagkey_prototype_v1", jtagkey_init, jtagkey_reset, NULL},
 	{"signalyzer", usbjtag_init, usbjtag_reset, NULL},
 	{"olimex-jtag", olimex_jtag_init, olimex_jtag_reset, olimex_jtag_blink},
+	{"m5960", m5960_init, m5960_reset, NULL},
 	{NULL, NULL, NULL},
 };
 
@@ -718,6 +721,34 @@ void olimex_jtag_reset(int trst, int srst)
     DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
 }
 
+void m5960_reset(int trst, int srst)
+{
+	if (trst == 1)
+	{
+		cur_state = TAP_TLR;
+		low_output &= ~nTRST;
+	}
+	else if (trst == 0)
+	{
+		low_output |= nTRST;
+	}
+
+    if (srst == 1)
+    {
+        low_output |= nSRST;
+    }
+    else if (srst == 0)
+    {
+        low_output &= ~nSRST;
+    }
+
+    /* command "set data bits low byte" */
+    BUFFER_ADD = 0x80;
+    BUFFER_ADD = low_output;
+    BUFFER_ADD = low_direction;
+    DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
+}
+
 int ft2232_execute_queue()
 {
 	jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
@@ -1304,6 +1335,52 @@ int olimex_jtag_init(void)
 	return ERROR_OK;
 }
 
+int m5960_init(void)
+{
+	u8 buf[3];
+	u32 bytes_written;
+	
+	low_output = 0x18;
+	low_direction = 0xfb;
+	
+	/* initialize low byte for jtag */
+	buf[0] = 0x80; /* command "set data bits low byte" */
+	buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
+	buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE[12]=out, n[ST]srst=out */
+	DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
+	
+	if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
+	{
+		ERROR("couldn't initialize FT2232 with 'm5960' layout"); 
+		return ERROR_JTAG_INIT_FAILED;
+	}
+	
+	nTRST = 0x10;
+	nTRSTnOE = 0x0; /* not output enable for nTRST */
+	nSRST = 0x20;
+	nSRSTnOE = 0x00; /* no output enable for nSRST */
+
+	high_output = 0x00;
+	high_direction = 0x0c;
+
+	/* turn red LED1 on, LED2 off */
+	high_output |= 0x08;
+	
+	/* initialize high port */
+	buf[0] = 0x82; /* command "set data bits high byte" */
+	buf[1] = high_output; /* value */
+	buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
+	DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
+	
+	if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
+	{
+		ERROR("couldn't initialize FT2232 with 'm5960' layout"); 
+		return ERROR_JTAG_INIT_FAILED;
+	}
+	
+	return ERROR_OK;
+}
+
 void olimex_jtag_blink(void)
 {
 	/* Olimex ARM-USB-OCD has a LED connected to ACBUS3
-- 
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