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-rw-r--r--src/jtag/ft2232.c105
-rw-r--r--src/target/interface/icebear.cfg23
2 files changed, 128 insertions, 0 deletions
diff --git a/src/jtag/ft2232.c b/src/jtag/ft2232.c
index 3075b1b4..a7e4e7b9 100644
--- a/src/jtag/ft2232.c
+++ b/src/jtag/ft2232.c
@@ -114,6 +114,7 @@ static int comstick_init(void);
static int stm32stick_init(void);
static int axm0432_jtag_init(void);
static int sheevaplug_init(void);
+static int icebear_jtag_init(void);
/* reset procedures for supported layouts */
static void usbjtag_reset(int trst, int srst);
@@ -125,6 +126,7 @@ static void comstick_reset(int trst, int srst);
static void stm32stick_reset(int trst, int srst);
static void axm0432_jtag_reset(int trst, int srst);
static void sheevaplug_reset(int trst, int srst);
+static void icebear_jtag_reset(int trst, int srst);
/* blink procedures for layouts that support a blinking led */
static void olimex_jtag_blink(void);
@@ -146,6 +148,7 @@ ft2232_layout_t ft2232_layouts[] =
{ "stm32stick", stm32stick_init, stm32stick_reset, NULL },
{ "axm0432_jtag", axm0432_jtag_init, axm0432_jtag_reset, NULL },
{"sheevaplug", sheevaplug_init, sheevaplug_reset, NULL },
+ { "icebear", icebear_jtag_init, icebear_jtag_reset, NULL },
{ NULL, NULL, NULL, NULL },
};
@@ -2661,3 +2664,105 @@ static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd)
return retval;
}
+
+/* ---------------------------------------------------------------------
+ * Support for IceBear JTAG adapter from Section5:
+ * http://section5.ch/icebear
+ *
+ * Author: Sten, debian@sansys-electronic.com
+ */
+
+/* Icebear pin layout
+ *
+ * ADBUS5 (nEMU) nSRST | 2 1| GND (10k->VCC)
+ * GND GND | 4 3| n.c.
+ * ADBUS3 TMS | 6 5| ADBUS6 VCC
+ * ADBUS0 TCK | 8 7| ADBUS7 (GND)
+ * ADBUS4 nTRST |10 9| ACBUS0 (GND)
+ * ADBUS1 TDI |12 11| ACBUS1 (GND)
+ * ADBUS2 TDO |14 13| GND GND
+ *
+ * ADBUS0 O L TCK ACBUS0 GND
+ * ADBUS1 O L TDI ACBUS1 GND
+ * ADBUS2 I TDO ACBUS2 n.c.
+ * ADBUS3 O H TMS ACBUS3 n.c.
+ * ADBUS4 O H nTRST
+ * ADBUS5 O H nSRST
+ * ADBUS6 - VCC
+ * ADBUS7 - GND
+ */
+static int icebear_jtag_init(void) {
+ u8 buf[3];
+ u32 bytes_written;
+
+ low_direction = 0x0b; /* output: TCK TDI TMS; input: TDO */
+ low_output = 0x08; /* high: TMS; low: TCK TDI */
+ nTRST = 0x10;
+ nSRST = 0x20;
+
+ if ((jtag_reset_config & RESET_TRST_OPEN_DRAIN) != 0) {
+ low_direction &= ~nTRST; /* nTRST high impedance */
+ }
+ else {
+ low_direction |= nTRST;
+ low_output |= nTRST;
+ }
+
+ low_direction |= nSRST;
+ low_output |= nSRST;
+
+ /* initialize low byte for jtag */
+ buf[0] = 0x80; /* command "set data bits low byte" */
+ buf[1] = low_output;
+ buf[2] = low_direction;
+ LOG_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) ) {
+ LOG_ERROR("couldn't initialize FT2232 with 'IceBear' layout (low)");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ high_output = 0x0;
+ high_direction = 0x00;
+
+
+ /* 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) */
+ LOG_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) ) {
+ LOG_ERROR("couldn't initialize FT2232 with 'IceBear' layout (high)");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ return ERROR_OK;
+}
+
+static void icebear_jtag_reset(int trst, int srst) {
+
+ if (trst == 1) {
+ low_direction |= nTRST;
+ low_output &= ~nTRST;
+ }
+ else if (trst == 0) {
+ if ((jtag_reset_config & RESET_TRST_OPEN_DRAIN) != 0)
+ low_direction &= ~nTRST;
+ else
+ 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;
+ LOG_DEBUG("trst: %i, srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", trst, srst, low_output, low_direction);
+}
diff --git a/src/target/interface/icebear.cfg b/src/target/interface/icebear.cfg
new file mode 100644
index 00000000..97b50daa
--- /dev/null
+++ b/src/target/interface/icebear.cfg
@@ -0,0 +1,23 @@
+#####################################################
+# IceBear Configuration
+#
+# http://section5.ch/icebear
+#
+# Author: Sten, debian@sansys-electronic.com
+#####################################################
+#
+# Add file /etc/udev/rules.d/45-icebear.rules
+#
+#BUS!="usb", ACTION!="add", SUBSYSTEM!=="usb_device", GOTO="kcontrol_rules_end"
+#
+#SYSFS{idProduct}=="c140", SYSFS{idVendor}=="0403", MODE="666", GROUP="usb"
+#SYSFS{idProduct}=="c141", SYSFS{idVendor}=="0403", MODE="666", GROUP="usb"
+#
+#LABEL="kcontrol_rules_end"
+#
+
+interface ft2232
+#ft2232_device_desc ""
+ft2232_layout icebear
+ft2232_vid_pid 0x0403 0xc140
+