* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
-/* This code uses information contained in the MPSSE specification which was
+/**
+ * @file
+ * JTAG adapters based on the FT2232 full and high speed USB parts are
+ * popular low cost JTAG debug solutions. Many FT2232 based JTAG adapters
+ * are discrete, but development boards may integrate them as alternatives
+ * to more capable (and expensive) third party JTAG pods. Since JTAG uses
+ * only one of the two ports on these devices, on integrated boards the
+ * second port often serves as a USB-to-serial adapter for the target's
+ * console UART even when the JTAG port is not in use. (Systems which
+ * support ARM's SWD in addition to JTAG, or instead of it, may use that
+ * second port for reading SWV trace data.)
+ *
+ * FT2232 based JTAG adapters are "dumb" not "smart", because most JTAG
+ * request/response interactions involve round trips over the USB link.
+ * A "smart" JTAG adapter has intelligence close to the scan chain, so it
+ * can for example poll quickly for a status change (usually taking on the
+ * order of microseconds not milliseconds) before beginning a queued
+ * transaction which require the previous one to have completed.
+ *
+ * There are dozens of adapters of this type, differing in details which
+ * this driver needs to understand. Those "layout" details are required
+ * as part of FT2232 driver configuration.
+ *
+ * This code uses information contained in the MPSSE specification which was
* found here:
* http://www.ftdichip.com/Documents/AppNotes/AN2232C-01_MPSSE_Cmnd.pdf
* Hereafter this is called the "MPSSE Spec".
*
* The datasheet for the ftdichip.com's FT2232D part is here:
* http://www.ftdichip.com/Documents/DataSheets/DS_FT2232D.pdf
+ *
+ * Also note the issue with code 0x4b (clock data to TMS) noted in
+ * http://developer.intra2net.com/mailarchive/html/libftdi/2009/msg00292.html
+ * which can affect longer JTAG state paths.
*/
#ifdef HAVE_CONFIG_H
/* project specific includes */
#include <jtag/interface.h>
-#include <jtag/commands.h>
#include <helper/time_support.h>
#if IS_CYGWIN == 1
/* FT2232 access library includes */
#if BUILD_FT2232_FTD2XX == 1
#include <ftd2xx.h>
+
+enum ftdi_interface
+{
+ INTERFACE_ANY = 0,
+ INTERFACE_A = 1,
+ INTERFACE_B = 2,
+ INTERFACE_C = 3,
+ INTERFACE_D = 4
+};
+
#elif BUILD_FT2232_LIBFTDI == 1
#include <ftdi.h>
#endif
int (*init)(void);
void (*reset)(int trst, int srst);
void (*blink)(void);
+ int channel;
};
/* init procedures for supported layouts */
static int cortino_jtag_init(void);
static int signalyzer_h_init(void);
static int ktlink_init(void);
+static int redbee_init(void);
/* reset procedures for supported layouts */
static void usbjtag_reset(int trst, int srst);
static void icebear_jtag_reset(int trst, int srst);
static void signalyzer_h_reset(int trst, int srst);
static void ktlink_reset(int trst, int srst);
+static void redbee_reset(int trst, int srst);
/* blink procedures for layouts that support a blinking led */
static void olimex_jtag_blink(void);
static const struct ft2232_layout ft2232_layouts[] =
{
- { "usbjtag", usbjtag_init, usbjtag_reset, NULL },
- { "jtagkey", jtagkey_init, jtagkey_reset, NULL },
- { "jtagkey_prototype_v1", jtagkey_init, jtagkey_reset, NULL },
- { "oocdlink", jtagkey_init, jtagkey_reset, NULL },
- { "signalyzer", usbjtag_init, usbjtag_reset, NULL },
- { "evb_lm3s811", usbjtag_init, usbjtag_reset, NULL },
- { "luminary_icdi", usbjtag_init, usbjtag_reset, NULL },
- { "olimex-jtag", olimex_jtag_init, olimex_jtag_reset, olimex_jtag_blink },
- { "flyswatter", flyswatter_init, flyswatter_reset, flyswatter_jtag_blink },
- { "turtelizer2", turtle_init, turtle_reset, turtle_jtag_blink },
- { "comstick", comstick_init, comstick_reset, NULL },
- { "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 },
- { "cortino", cortino_jtag_init, comstick_reset, NULL },
- { "signalyzer-h", signalyzer_h_init, signalyzer_h_reset, signalyzer_h_blink },
- { "ktlink", ktlink_init, ktlink_reset, ktlink_blink },
- { NULL, NULL, NULL, NULL },
+ { .name = "usbjtag",
+ .init = usbjtag_init,
+ .reset = usbjtag_reset,
+ },
+ { .name = "jtagkey",
+ .init = jtagkey_init,
+ .reset = jtagkey_reset,
+ },
+ { .name = "jtagkey_prototype_v1",
+ .init = jtagkey_init,
+ .reset = jtagkey_reset,
+ },
+ { .name = "oocdlink",
+ .init = jtagkey_init,
+ .reset = jtagkey_reset,
+ },
+ { .name = "signalyzer",
+ .init = usbjtag_init,
+ .reset = usbjtag_reset,
+ },
+ { .name = "evb_lm3s811",
+ .init = usbjtag_init,
+ .reset = usbjtag_reset,
+ },
+ { .name = "luminary_icdi",
+ .init = usbjtag_init,
+ .reset = usbjtag_reset,
+ },
+ { .name = "olimex-jtag",
+ .init = olimex_jtag_init,
+ .reset = olimex_jtag_reset,
+ .blink = olimex_jtag_blink
+ },
+ { .name = "flyswatter",
+ .init = flyswatter_init,
+ .reset = flyswatter_reset,
+ .blink = flyswatter_jtag_blink
+ },
+ { .name = "turtelizer2",
+ .init = turtle_init,
+ .reset = turtle_reset,
+ .blink = turtle_jtag_blink
+ },
+ { .name = "comstick",
+ .init = comstick_init,
+ .reset = comstick_reset,
+ },
+ { .name = "stm32stick",
+ .init = stm32stick_init,
+ .reset = stm32stick_reset,
+ },
+ { .name = "axm0432_jtag",
+ .init = axm0432_jtag_init,
+ .reset = axm0432_jtag_reset,
+ },
+ { .name = "sheevaplug",
+ .init = sheevaplug_init,
+ .reset = sheevaplug_reset,
+ },
+ { .name = "icebear",
+ .init = icebear_jtag_init,
+ .reset = icebear_jtag_reset,
+ },
+ { .name = "cortino",
+ .init = cortino_jtag_init,
+ .reset = comstick_reset,
+ },
+ { .name = "signalyzer-h",
+ .init = signalyzer_h_init,
+ .reset = signalyzer_h_reset,
+ .blink = signalyzer_h_blink
+ },
+ { .name = "ktlink",
+ .init = ktlink_init,
+ .reset = ktlink_reset,
+ .blink = ktlink_blink
+ },
+ { .name = "redbee-econotag",
+ .init = redbee_init,
+ .reset = redbee_reset,
+ },
+ { .name = "redbee-usb",
+ .init = redbee_init,
+ .reset = redbee_reset,
+ .channel = INTERFACE_B,
+ },
+ { .name = NULL, /* END OF TABLE */ },
};
static uint8_t nTRST, nTRSTnOE, nSRST, nSRSTnOE;
LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
}
+static void redbee_reset(int trst, int srst)
+{
+ if (trst == 1)
+ {
+ tap_set_state(TAP_RESET);
+ high_output &= ~nTRST;
+ }
+ else if (trst == 0)
+ {
+ high_output |= nTRST;
+ }
+
+ if (srst == 1)
+ {
+ high_output &= ~nSRST;
+ }
+ else if (srst == 0)
+ {
+ high_output |= nSRST;
+ }
+
+ /* command "set data bits low byte" */
+ buffer_write(0x82);
+ buffer_write(high_output);
+ buffer_write(high_direction);
+ LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, "
+ "high_direction: 0x%2.2x", trst, srst, high_output,
+ high_direction);
+}
+
static int ft2232_execute_runtest(struct jtag_command *cmd)
{
int retval;
return retval;
}
+/**
+ * Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
+ * (or SWD) state machine.
+ */
+static int ft2232_execute_tms(struct jtag_command *cmd)
+{
+ int retval = ERROR_OK;
+ unsigned num_bits = cmd->cmd.tms->num_bits;
+ const uint8_t *bits = cmd->cmd.tms->bits;
+ unsigned count;
+
+ DEBUG_JTAG_IO("TMS: %d bits", num_bits);
+
+ /* only send the maximum buffer size that FT2232C can handle */
+ count = 3 * DIV_ROUND_UP(num_bits, 4);
+ if (ft2232_buffer_size + 3*count + 1 > FT2232_BUFFER_SIZE) {
+ if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
+ retval = ERROR_JTAG_QUEUE_FAILED;
+
+ require_send = 0;
+ first_unsent = cmd;
+ }
+
+ /* Shift out in batches of at most 6 bits; there's a report of an
+ * FT2232 bug in this area, where shifting exactly 7 bits can make
+ * problems with TMS signaling for the last clock cycle:
+ *
+ * http://developer.intra2net.com/mailarchive/html/
+ * libftdi/2009/msg00292.html
+ *
+ * Command 0x4b is: "Clock Data to TMS/CS Pin (no Read)"
+ *
+ * Note that pathmoves in JTAG are not often seven bits, so that
+ * isn't a particularly likely situation outside of "special"
+ * signaling such as switching between JTAG and SWD modes.
+ */
+ while (num_bits) {
+ if (num_bits <= 6) {
+ buffer_write(0x4b);
+ buffer_write(num_bits - 1);
+ buffer_write(*bits & 0x3f);
+ break;
+ }
+
+ /* Yes, this is lazy ... we COULD shift out more data
+ * bits per operation, but doing it in nybbles is easy
+ */
+ buffer_write(0x4b);
+ buffer_write(3);
+ buffer_write(*bits & 0xf);
+ num_bits -= 4;
+
+ count = (num_bits > 4) ? 4 : num_bits;
+
+ buffer_write(0x4b);
+ buffer_write(count - 1);
+ buffer_write((*bits >> 4) & 0xf);
+ num_bits -= count;
+
+ bits++;
+ }
+
+ require_send = 1;
+ return retval;
+}
+
static int ft2232_execute_pathmove(struct jtag_command *cmd)
{
int predicted_size = 0;
static int ft2232_execute_command(struct jtag_command *cmd)
{
int retval;
- retval = ERROR_OK;
switch (cmd->type)
{
case JTAG_SCAN: retval = ft2232_execute_scan(cmd); break;
case JTAG_SLEEP: retval = ft2232_execute_sleep(cmd); break;
case JTAG_STABLECLOCKS: retval = ft2232_execute_stableclocks(cmd); break;
+ case JTAG_TMS:
+ retval = ft2232_execute_tms(cmd);
+ break;
default:
LOG_ERROR("BUG: unknown JTAG command type encountered");
- exit(-1);
+ retval = ERROR_JTAG_QUEUE_FAILED;
+ break;
}
return retval;
}
#endif /* BUILD_FT2232_FTD2XX == 1 */
#if BUILD_FT2232_LIBFTDI == 1
-static int ft2232_init_libftdi(uint16_t vid, uint16_t pid, int more, int* try_more)
+static int ft2232_init_libftdi(uint16_t vid, uint16_t pid, int more, int* try_more, int channel)
{
uint8_t latency_timer;
if (ftdi_init(&ftdic) < 0)
return ERROR_JTAG_INIT_FAILED;
- if (ftdi_set_interface(&ftdic, INTERFACE_A) < 0)
+ /* default to INTERFACE_A */
+ if(channel == INTERFACE_ANY) { channel = INTERFACE_A; }
+
+ if (ftdi_set_interface(&ftdic, channel) < 0)
{
LOG_ERROR("unable to select FT2232 channel A: %s", ftdic.error_str);
return ERROR_JTAG_INIT_FAILED;
more, &try_more);
#elif BUILD_FT2232_LIBFTDI == 1
retval = ft2232_init_libftdi(ft2232_vid[i], ft2232_pid[i],
- more, &try_more);
+ more, &try_more, cur_layout->channel);
#endif
if (retval >= 0)
break;
}
else if (strcmp(ft2232_layout, "evb_lm3s811") == 0)
{
+ /* There are multiple revisions of LM3S811 eval boards:
+ * - Rev B (and older?) boards have no SWO trace support.
+ * - Rev C boards add ADBUS_6 DBG_ENn and BDBUS_4 SWO_EN;
+ * they should use the "luminary_icdi" layout instead.
+ */
nTRST = 0x0;
nTRSTnOE = 0x00;
nSRST = 0x20;
}
else if (strcmp(ft2232_layout, "luminary_icdi") == 0)
{
+ /* Most Luminary eval boards support SWO trace output,
+ * and should use this "luminary_icdi" layout.
+ */
nTRST = 0x0;
nTRSTnOE = 0x00;
nSRST = 0x20;
return ERROR_OK;
}
+static int redbee_init(void)
+{
+ uint8_t buf[3];
+ uint32_t bytes_written;
+
+ low_output = 0x08;
+ low_direction = 0x2b;
+
+ /* initialize low byte for jtag */
+ /* command "set data bits low byte" */
+ buf[0] = 0x80;
+ /* value (TMS = 1,TCK = 0, TDI = 0, nOE = 0) */
+ buf[2] = low_direction;
+ /* dir (output = 1), TCK/TDI/TMS = out, TDO = in, nOE = out */
+ buf[1] = low_output;
+ 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 'redbee' layout");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ nTRST = 0x08;
+ nTRSTnOE = 0x0; /* No output enable for TRST*/
+ nSRST = 0x04;
+ nSRSTnOE = 0x0; /* No output enable for SRST*/
+
+ high_output = 0x0;
+ high_direction = 0x0c;
+
+ enum reset_types jtag_reset_config = jtag_get_reset_config();
+ if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
+ {
+ LOG_ERROR("can't set nTRSTOE to push-pull on redbee");
+ }
+ else
+ {
+ high_output |= nTRST;
+ }
+
+ if (jtag_reset_config & RESET_SRST_PUSH_PULL)
+ {
+ LOG_ERROR("can't set nSRST to push-pull on redbee");
+ }
+ else
+ {
+ high_output |= nSRST;
+ }
+
+ /* 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 'redbee' layout");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ return ERROR_OK;
+}
+
static int jtagkey_init(void)
{
uint8_t buf[3];
.handler = &ft2232_handle_device_desc_command,
.mode = COMMAND_CONFIG,
.help = "set the USB device description of the FTDI FT2232 device",
- .usage = "<description>",
+ .usage = "description_string",
},
{
.name = "ft2232_serial",
.handler = &ft2232_handle_serial_command,
.mode = COMMAND_CONFIG,
.help = "set the serial number of the FTDI FT2232 device",
- .usage = "<serial#>",
+ .usage = "serial_string",
},
{
.name = "ft2232_layout",
.mode = COMMAND_CONFIG,
.help = "set the layout of the FT2232 GPIO signals used "
"to control output-enables and reset signals",
- .usage = "<layout>",
+ .usage = "layout_name",
},
{
.name = "ft2232_vid_pid",
.handler = &ft2232_handle_vid_pid_command,
.mode = COMMAND_CONFIG,
.help = "the vendor ID and product ID of the FTDI FT2232 device",
- .usage = "<vid> <pid> [...]",
+ .usage = "(vid pid)* ",
},
{
.name = "ft2232_latency",
.handler = &ft2232_handle_latency_command,
.mode = COMMAND_CONFIG,
.help = "set the FT2232 latency timer to a new value",
- .usage = "<vid> <pid> [...]",
+ .usage = "value",
},
COMMAND_REGISTRATION_DONE
};
struct jtag_interface ft2232_interface = {
- .name = "ft2232",
- .commands = ft2232_command_handlers,
- .init = &ft2232_init,
- .quit = &ft2232_quit,
- .speed = &ft2232_speed,
- .speed_div = &ft2232_speed_div,
- .khz = &ft2232_khz,
- .execute_queue = &ft2232_execute_queue,
- };
+ .name = "ft2232",
+ .supported = DEBUG_CAP_TMS_SEQ,
+ .commands = ft2232_command_handlers,
+
+ .init = ft2232_init,
+ .quit = ft2232_quit,
+ .speed = ft2232_speed,
+ .speed_div = ft2232_speed_div,
+ .khz = ft2232_khz,
+ .execute_queue = ft2232_execute_queue,
+};
Code Review / openocd.git / blobdiff