Some ft2232 based devices (such as the FLOSS-JTAG) do
not include an on-board eeprom. Without an eeprom, the
devices do not have a unique serial number. When you
have multiple of these devices plugged into the same
PC, openocd has no way to distinguish between them.
This commit adds the 'ft2232_bus_addr' configuration
command which allows the user to specify the fully
qualified bus address of the ft2232 device. The
format of the address is the same as for the
equivalent -s option in lsusb for selecting the device:
<bus>:<devnum>
For example, if lsusb reports something like this:
Bus 002 Device 084: ID 0403:6010 Future Technology Devices
International, Ltd FT2232C
Dual USB-UART/FIFO IC
Then this configuration command will select this device in
openocd:
ft2232_bus_addr 002:084
Hint: You can use 'lsusb -tv' to display your devices in
tree format to find the device address associated with a
specific port on a USB hub.
Signed-off-by: Stacey Sheldon <[email protected]>
---
src/jtag/drivers/ft2232.c | 75 ++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 74 insertions(+), 1 deletions(-)
diff --git a/src/jtag/drivers/ft2232.c b/src/jtag/drivers/ft2232.c
index 2ac410a..e866625 100644
--- a/src/jtag/drivers/ft2232.c
+++ b/src/jtag/drivers/ft2232.c
@@ -1,4 +1,7 @@
/***************************************************************************
+* Copyright (C) 2010 by Stacey Sheldon *
+* Stacey Sheldon <[email protected]> *
+* *
* Copyright (C) 2009 by Ãyvind Harboe *
* Ãyvind Harboe <[email protected]> *
* *
@@ -153,6 +156,7 @@ static int ft2232_stableclocks(int num_cycles, struct
jtag_command* cmd);
static char * ft2232_device_desc_A = NULL;
static char* ft2232_device_desc = NULL;
static char* ft2232_serial = NULL;
+static char* ft2232_bus_addr = NULL;
static uint8_t ft2232_latency = 2;
static unsigned ft2232_max_tck = FTDI_2232C_MAX_TCK;
@@ -2238,8 +2242,56 @@ static int ft2232_init_libftdi(uint16_t vid, uint16_t
pid, int more, int* try_mo
return ERROR_JTAG_INIT_FAILED;
}
+ if (ft2232_bus_addr)
+ {
+ struct ftdi_device_list *ftdi_list;
+ struct ftdi_device_list *ftdi_dev;
+
+ if (ftdi_usb_find_all(&ftdic, &ftdi_list, vid, pid) < 0)
+ {
+ LOG_ERROR("unable to scan for FT2232 devices: %s",
ftdic.error_str);
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ /* got the list of devices, look for a match */
+ for (ftdi_dev = ftdi_list; ftdi_dev != NULL; ftdi_dev =
ftdi_dev->next)
+ {
+ char path[PATH_MAX + 1] = { 0 };
+
+ if(ftdi_dev->dev->bus)
+ {
+ strncat(path, ftdi_dev->dev->bus->dirname,
sizeof(path)-1);
+ strncat(path, ":", sizeof(path)-1);
+ }
+ strncat(path, ftdi_dev->dev->filename, sizeof(path)-1);
+ /* check if we have a match on bus address */
+ LOG_DEBUG ("Considering ftdi device at bus addr: %s",
path);
+ if (strcmp(ft2232_bus_addr, path) == 0)
+ {
+ /* found a match, break out */
+ LOG_DEBUG ("Matched ftdi device at bus addr:
%s", path);
+ break;
+ }
+ }
+
+ if (!ftdi_dev)
+ {
+ ftdi_list_free(&ftdi_list);
+ LOG_ERROR("failed to match FT2232 device by addr: %s",
ft2232_bus_addr);
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ if (ftdi_usb_open_dev(&ftdic, ftdi_dev->dev) < 0)
+ {
+ ftdi_list_free(&ftdi_list);
+ LOG_ERROR("unable to open ftdi device: %s",
ftdic.error_str);
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ ftdi_list_free(&ftdi_list);
+ }
/* context, vendor id, product id */
- if (ftdi_usb_open_desc(&ftdic, vid, pid, ft2232_device_desc,
+ else if (ftdi_usb_open_desc(&ftdic, vid, pid, ft2232_device_desc,
ft2232_serial) < 0)
{
if (more)
@@ -3246,6 +3298,20 @@ COMMAND_HANDLER(ft2232_handle_latency_command)
return ERROR_OK;
}
+COMMAND_HANDLER(ft2232_handle_bus_addr_command)
+{
+ if (CMD_ARGC == 1)
+ {
+ ft2232_bus_addr = strdup(CMD_ARGV[0]);
+ }
+ else
+ {
+ LOG_ERROR("expected exactly one argument to ft2232_bus_addr
<bus:devnum>");
+ }
+
+ return ERROR_OK;
+}
+
static int ft2232_stableclocks(int num_cycles, struct jtag_command* cmd)
{
int retval = 0;
@@ -4343,6 +4409,13 @@ static const struct command_registration
ft2232_command_handlers[] = {
.usage = "(vid pid)* ",
},
{
+ .name = "ft2232_bus_addr",
+ .handler = &ft2232_handle_bus_addr_command,
+ .mode = COMMAND_CONFIG,
+ .help = "the bus address of the FTDI FT2232 device",
+ .usage = "bus:devnum",
+ },
+ {
.name = "ft2232_latency",
.handler = &ft2232_handle_latency_command,
.mode = COMMAND_CONFIG,
--
1.7.0
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