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FT2232: lookup and save layout just once 

Streamline use of the layout:  have the "ft2232_layout" command
look it up and save the result, instead of having a few different
chunks of code looking it up later, and saving just its name (which
is already part of the layout).  This

   - is cleaner
   - reports errors sooner
   - facilitates earlier adapter-specific setup
   - removes unused "default to "usbjtag" logic

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell 2010-03-14 13:10:26 -07:00
parent 763013f15e
commit c23d4596d2
1 changed files with 39 additions and 31 deletions
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70
src/jtag/drivers/ft2232.c
View File

@ -141,7 +141,6 @@ 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_layout = NULL;
static uint8_t ft2232_latency = 2;
static unsigned ft2232_max_tck = FTDI_2232C_MAX_TCK;
@ -289,7 +288,9 @@ static const struct ft2232_layout ft2232_layouts[] =
static uint8_t nTRST, nTRSTnOE, nSRST, nSRSTnOE;
/** the layout being used with this debug session */
static const struct ft2232_layout *layout;
static uint8_t low_output = 0x0;
static uint8_t low_direction = 0x0;
static uint8_t high_output = 0x0;
@ -2020,7 +2021,12 @@ static int ft2232_init_ftd2xx(uint16_t vid, uint16_t pid, int more, int* try_mor
char* openex_string = NULL;
uint8_t latency_timer;
LOG_DEBUG("'ft2232' interface using FTD2XX with '%s' layout (%4.4x:%4.4x)", ft2232_layout, vid, pid);
if ((layout == NULL) {
LOG_WARNING("No ft2232 layout specified'");
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("'ft2232' interface using FTD2XX with '%s' layout (%4.4x:%4.4x)", layout->name, vid, pid);
#if IS_WIN32 == 0
/* Add non-standard Vid/Pid to the linux driver */
@ -2187,8 +2193,13 @@ static int ft2232_init_libftdi(uint16_t vid, uint16_t pid, int more, int* try_mo
{
uint8_t latency_timer;
if (layout == NULL) {
LOG_WARNING("No ft2232 layout specified'");
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("'ft2232' interface using libftdi with '%s' layout (%4.4x:%4.4x)",
ft2232_layout, vid, pid);
layout->name, vid, pid);
if (ftdi_init(&ftdic) < 0)
return ERROR_JTAG_INIT_FAILED;
@ -2268,8 +2279,6 @@ static int ft2232_init(void)
uint8_t buf[1];
int retval;
uint32_t bytes_written;
const struct ft2232_layout* cur_layout = ft2232_layouts;
int i;
if (tap_get_tms_path_len(TAP_IRPAUSE,TAP_IRPAUSE) == 7)
{
@ -2280,29 +2289,12 @@ static int ft2232_init(void)
LOG_DEBUG("ft2232 interface using shortest path jtag state transitions");
}
if ((ft2232_layout == NULL) || (ft2232_layout[0] == 0))
{
ft2232_layout = "usbjtag";
LOG_WARNING("No ft2232 layout specified, using default 'usbjtag'");
}
while (cur_layout->name)
{
if (strcmp(cur_layout->name, ft2232_layout) == 0)
{
layout = cur_layout;
break;
}
cur_layout++;
}
if (!layout)
{
LOG_ERROR("No matching layout found for %s", ft2232_layout);
if (layout == NULL) {
LOG_WARNING("No ft2232 layout specified'");
return ERROR_JTAG_INIT_FAILED;
}
for (i = 0; 1; i++)
for (int i = 0; 1; i++)
{
/*
* "more indicates that there are more IDs to try, so we should
@ -2321,7 +2313,7 @@ static int ft2232_init(void)
more, &try_more);
#elif BUILD_FT2232_LIBFTDI == 1
retval = ft2232_init_libftdi(ft2232_vid[i], ft2232_pid[i],
more, &try_more, cur_layout->channel);
more, &try_more, layout->channel);
#endif
if (retval >= 0)
break;
@ -2371,6 +2363,7 @@ static int usbjtag_init(void)
{
uint8_t buf[3];
uint32_t bytes_written;
char *ft2232_layout = layout->name;
low_output = 0x08;
low_direction = 0x0b;
@ -3131,13 +3124,28 @@ COMMAND_HANDLER(ft2232_handle_serial_command)
COMMAND_HANDLER(ft2232_handle_layout_command)
{
if (CMD_ARGC == 0)
return ERROR_OK;
if (CMD_ARGC != 1) {
LOG_ERROR("Need exactly one argument to ft2232_layout");
return ERROR_FAIL;
}
ft2232_layout = malloc(strlen(CMD_ARGV[0]) + 1);
strcpy(ft2232_layout, CMD_ARGV[0]);
if (layout) {
LOG_ERROR("already specified ft2232_layout %s",
layout->name);
return (strcmp(layout->name, CMD_ARGV[0]) != 0)
? ERROR_FAIL
: ERROR_OK;
}
return ERROR_OK;
for (const struct ft2232_layout *l = ft2232_layouts; l->name; l++) {
if (strcmp(l->name, CMD_ARGV[0]) == 0) {
layout = l;
return ERROR_OK;
}
}
LOG_ERROR("No FT2232 layout '%s' found", CMD_ARGV[0]);
return ERROR_FAIL;
}
COMMAND_HANDLER(ft2232_handle_vid_pid_command)