OpenOCD: adds proper TIAO USB Multi-Protocol Adapter (TUMPA) support

openocd_ft2232_tumpa.patch

diff --git a/src/jtag/drivers/ft2232.c b/src/jtag/drivers/ft2232.c
index 6758dc7..091c396 100644
--- a/src/jtag/drivers/ft2232.c
+++ b/src/jtag/drivers/ft2232.c
@@ -194,6 +194,7 @@ static int lisa_l_init(void);
 static int flossjtag_init(void);
 static int xds100v2_init(void);
 static int digilent_hs1_init(void);
+static int tumpa_init(void);
 
 /* reset procedures for supported layouts */
 static void ftx23_reset(int trst, int srst);
@@ -213,6 +214,7 @@ static void ktlink_reset(int trst, int srst);
 static void redbee_reset(int trst, int srst);
 static void xds100v2_reset(int trst, int srst);
 static void digilent_hs1_reset(int trst, int srst);
+static void tumpa_reset(int trst, int srst);
 
 /* blink procedures for layouts that support a blinking led */
 static void olimex_jtag_blink(void);
@@ -344,6 +346,11 @@ static const struct ft2232_layout  ft2232_layouts[] = {
 		.reset = digilent_hs1_reset,
 		.channel = INTERFACE_A,
 	},
+	{ .name = "tumpa",
+		.init = tumpa_init,
+		.reset = tumpa_reset,
+		.channel = INTERFACE_A,
+	},
 	{ .name = NULL, /* END OF TABLE */ },
 };
 
@@ -1637,6 +1644,32 @@ static void xds100v2_reset(int trst, int srst)
 		high_direction);
 }
 
+static void tumpa_reset(int trst, int srst)
+{
+	if (trst == 1) {
+		tap_set_state(TAP_RESET);
+		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_write(0x80);
+	buffer_write(low_output);
+	buffer_write(low_direction);
+	LOG_DEBUG("trst: %i, srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x",
+		trst,
+		srst,
+		low_output,
+		low_direction);
+}
+
 static int ft2232_execute_runtest(struct jtag_command *cmd)
 {
 	int retval;
@@ -3049,6 +3082,33 @@ static int xds100v2_init(void)
 	return ERROR_OK;
 }
 
+static int tumpa_init(void)
+{
+
+	nTRST = 0x20;
+	nSRST = 0x10;
+
+	low_output    = 0x08 | nTRST | 0x40;
+	low_direction = 0x0b | nTRST | nSRST;
+
+	/* initialize low byte for jtag */
+	if (ft2232_set_data_bits_low_byte(low_output, low_direction) != ERROR_OK) {
+		LOG_ERROR("couldn't initialize FT2232 with 'tumpa' layout");
+		return ERROR_JTAG_INIT_FAILED;
+	}
+
+	high_output    = 0x0;
+	high_direction = 0x08;
+
+	/* initialize high byte for jtag */
+	if (ft2232_set_data_bits_high_byte(high_output, high_direction) != ERROR_OK) {
+		LOG_ERROR("couldn't initialize FT2232 with 'tumpa' layout");
+		return ERROR_JTAG_INIT_FAILED;
+	}
+
+	return ERROR_OK;
+}
+
 static void olimex_jtag_blink(void)
 {
 	/* Olimex ARM-USB-OCD has a LED connected to ACBUS3