Commit 3368bb5a authored by zwelch's avatar zwelch
Browse files

Sten <debian@sansys-electronic.com>: add support for ICEbear FDTI-based interface.

git-svn-id: svn://svn.berlios.de/openocd/trunk@1565 b42882b7-edfa-0310-969c-e2dbd0fdcd60
parent ae719b27
......@@ -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);
}
#####################################################
# 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
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment