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Add high-speed device support in FT2232 driver:

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- Initial support for FT2232H/FT4232H devices from FTDI.
- Add --enable-ftd2xx-highspeed option to configure script.
- Original patch submitted by Joern Kaipf <lists@joernline.de>.


git-svn-id: svn://svn.berlios.de/openocd/trunk@1998 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
zwelch
2009-06-02 07:51:16 +00:00
parent 8dab0ecf23
commit 6625e926fd
2 changed files with 107 additions and 1 deletions
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78
src/jtag/ft2232.c
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@@ -92,6 +92,8 @@ static int ft2232_handle_latency_command(struct command_context_s* cmd_ctx, char
*/
static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd);
/* max TCK for the high speed devices 30000 kHz */
#define FTDI_2232H_4232H_MAX_TCK 30000
static char * ft2232_device_desc_A = NULL;
static char* ft2232_device_desc = NULL;
@@ -174,6 +176,7 @@ static u8 high_direction = 0x0;
#if BUILD_FT2232_FTD2XX == 1
static FT_HANDLE ftdih = NULL;
static FT_DEVICE ftdi_device = 0;
#elif BUILD_FT2232_LIBFTDI == 1
static struct ftdi_context ftdic;
#endif
@@ -411,6 +414,46 @@ static int ft2232_read(u8* buf, u32 size, u32* bytes_read)
return ERROR_OK;
}
#ifdef BUILD_FTD2XX_HIGHSPEED
static bool ft2232_device_is_highspeed(void)
{
return (ftdi_device == FT_DEVICE_2232H) || (ftdi_device == FT_DEVICE_4232H);
}
static int ft2232_adaptive_clocking(int speed)
{
bool use_adaptive_clocking = FALSE;
if (0 == speed)
{
if (ft2232_device_is_highspeed())
use_adaptive_clocking = TRUE;
else
{
LOG_ERROR("ft2232 device %lu does not support RTCK", ftdi_device);
return ERROR_OK;
}
}
u8 buf = use_adaptive_clocking ? 0x96 : 0x97;
LOG_DEBUG("%2.2x", buf);
u32 bytes_written;
int retval = ft2232_write(&buf, 1, &bytes_written);
if (ERROR_OK != retval || bytes_written != 1)
{
LOG_ERROR("unable to set adative clocking: %d", retval);
return retval;
}
return ERROR_OK;
}
#else
static int ft2232_adaptive_clocking(int speed)
{
// not implemented on low-speed devices
return speed ? ERROR_OK : -1234;
}
#endif
static int ft2232_speed(int speed)
{
@@ -418,6 +461,8 @@ static int ft2232_speed(int speed)
int retval;
u32 bytes_written;
ft2232_adaptive_clocking(speed);
buf[0] = 0x86; /* command "set divisor" */
buf[1] = speed & 0xff; /* valueL (0=6MHz, 1=3MHz, 2=2.0MHz, ...*/
buf[2] = (speed >> 8) & 0xff; /* valueH */
@@ -449,8 +494,15 @@ static int ft2232_khz(int khz, int* jtag_speed)
{
if (khz==0)
{
LOG_DEBUG("RTCK not supported");
#ifdef BUILD_FTD2XX_HIGHSPEED
*jtag_speed = 0;
return ERROR_OK;
#else
LOG_DEBUG("RCLK not supported");
LOG_DEBUG("If you have a high-speed FTDI device, then "
"OpenOCD may be built with --enable-ftd2xx-highspeed.");
return ERROR_FAIL;
#endif
}
/* Take a look in the FT2232 manual,
@@ -1724,6 +1776,9 @@ static int ft2232_execute_queue()
static int ft2232_init_ftd2xx(u16 vid, u16 pid, int more, int* try_more)
{
FT_STATUS status;
DWORD deviceID;
char SerialNumber[16];
char Description[64];
DWORD openex_flags = 0;
char* openex_string = NULL;
u8 latency_timer;
@@ -1854,6 +1909,27 @@ static int ft2232_init_ftd2xx(u16 vid, u16 pid, int more, int* try_more)
return ERROR_JTAG_INIT_FAILED;
}
if ( ( status = FT_GetDeviceInfo(ftdih, &ftdi_device, &deviceID, SerialNumber, Description, NULL) ) != FT_OK )
{
LOG_ERROR("unable to get FT_GetDeviceInfo: %lu", status);
return ERROR_JTAG_INIT_FAILED;
}
else
{
LOG_INFO("device: %lu", ftdi_device);
LOG_INFO("deviceID: %lu", deviceID);
LOG_INFO("SerialNumber: %s", SerialNumber);
LOG_INFO("Description: %s", Description);
#ifdef BUILD_FTD2XX_HIGHSPEED
if (ft2232_device_is_highspeed())
{
ft2232_max_tck = FTDI_2232H_4232H_MAX_TCK;
LOG_INFO("max TCK change to: %u kHz", ft2232_max_tck);
}
#endif
}
return ERROR_OK;
}