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ftdijtag: add workaround for ch552 ft2232c clone present in tangNano board

This commit is contained in:
Gwenhael Goavec-Merou 2020-01-18 17:51:58 +01:00
parent fe97800106
commit d2d52c2871
2 changed files with 49 additions and 21 deletions
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68
ftdijtag.cpp
View File

@ -1,3 +1,4 @@
#include <libusb.h>
#include <iostream>
#include <map>
@ -47,16 +48,9 @@ FtdiJtag::FtdiJtag(FTDIpp_MPSSE::mpsse_bit_config &cable, string dev,
FTDIpp_MPSSE(dev, interface, clkHZ, verbose),
_state(RUN_TEST_IDLE),
_tms_buffer_size(128), _num_tms(0),
_board_name("nope")
_board_name("nope"), _ch552WA(false)
{
display("%x\n", cable.bit_low_val);
display("%x\n", cable.bit_low_dir);
display("%x\n", cable.bit_high_val);
display("%x\n", cable.bit_high_dir);
_tms_buffer = (unsigned char *)malloc(sizeof(unsigned char) * _tms_buffer_size);
bzero(_tms_buffer, _tms_buffer_size);
init(1, 0xfb, cable);
init_internal(cable);
}
FtdiJtag::FtdiJtag(FTDIpp_MPSSE::mpsse_bit_config &cable,
@ -64,17 +58,9 @@ FtdiJtag::FtdiJtag(FTDIpp_MPSSE::mpsse_bit_config &cable,
FTDIpp_MPSSE(cable.vid, cable.pid, interface, clkHZ, verbose),
_state(RUN_TEST_IDLE),
_tms_buffer_size(128), _num_tms(0),
_board_name("nope")
_board_name("nope"), _ch552WA(false)
{
display("board_name %s\n", _board_name.c_str());
display("%x\n", cable.bit_low_val);
display("%x\n", cable.bit_low_dir);
display("%x\n", cable.bit_high_val);
display("%x\n", cable.bit_high_dir);
_tms_buffer = (unsigned char *)malloc(sizeof(unsigned char) * _tms_buffer_size);
bzero(_tms_buffer, _tms_buffer_size);
init(1, 0xfb, cable);
init_internal(cable);
}
FtdiJtag::~FtdiJtag()
@ -102,9 +88,40 @@ FtdiJtag::~FtdiJtag()
free(_tms_buffer);
}
void FtdiJtag::init_internal(FTDIpp_MPSSE::mpsse_bit_config &cable)
{
/* search for iProduct -> need to have
* ftdi->usb_dev (libusb_device_handler) -> libusb_device ->
* libusb_device_descriptor
*/
struct libusb_device * usb_dev = libusb_get_device(_ftdi->usb_dev);
struct libusb_device_descriptor usb_desc;
unsigned char iProduct[200];
libusb_get_device_descriptor(usb_dev, &usb_desc);
libusb_get_string_descriptor_ascii(_ftdi->usb_dev, usb_desc.iProduct,
iProduct, 200);
display("iProduct : %s\n", iProduct);
if (!strncmp((const char *)iProduct, "Sipeed-Debug", 12)) {
_ch552WA = true;
}
display("board_name %s\n", _board_name.c_str());
display("%x\n", cable.bit_low_val);
display("%x\n", cable.bit_low_dir);
display("%x\n", cable.bit_high_val);
display("%x\n", cable.bit_high_dir);
_tms_buffer = (unsigned char *)malloc(sizeof(unsigned char) * _tms_buffer_size);
bzero(_tms_buffer, _tms_buffer_size);
init(5, 0xfb, cable);
}
int FtdiJtag::detectChain(vector<int> &devices, int max_dev)
{
unsigned char rx_buff[4];
/* WA for CH552/tangNano: write is always mandatory */
unsigned char tx_buff[4] = {0xff, 0xff, 0xff, 0xff};
unsigned int tmp;
devices.clear();
@ -112,7 +129,7 @@ int FtdiJtag::detectChain(vector<int> &devices, int max_dev)
set_state(SHIFT_DR);
for (int i = 0; i < max_dev; i++) {
read_write(NULL, rx_buff, 32, (i == max_dev-1)?1:0);
read_write(tx_buff, rx_buff, 32, (i == max_dev-1)?1:0);
tmp = 0;
for (int ii=0; ii < 4; ii++)
tmp |= (rx_buff[ii] << (8*ii));
@ -197,6 +214,7 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
int nb_byte = real_len >> 3; // number of byte to send
int nb_bit = (real_len & 0x07); // residual bits
int xfer = tx_buff_size - 3;
unsigned char c[len];
unsigned char *rx_ptr = (unsigned char *)tdo;
unsigned char *tx_ptr = (unsigned char *)tdi;
unsigned char tx_buf[3] = {(unsigned char)(MPSSE_LSB | MPSSE_WRITE_NEG |
@ -218,6 +236,8 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
if (tdo) {
mpsse_read(rx_ptr, xfer);
rx_ptr += xfer;
} else if (_ch552WA) {
ftdi_read_data(_ftdi, c, xfer);
}
nb_byte -= xfer;
}
@ -236,6 +256,8 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
if (tdo) {
mpsse_read(rx_ptr, nb_byte);
rx_ptr += nb_byte;
} else if (_ch552WA) {
ftdi_read_data(_ftdi, c, nb_byte);
}
}
@ -251,7 +273,7 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
mpsse_store(last_bit);
}
mpsse_write();
if (tdo) {
if (tdo) {
mpsse_read(rx_ptr, 1);
/* realign we have read nb_bit
* since LSB add bit by the left and shift
@ -259,6 +281,8 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
*/
*rx_ptr >>= (8 - nb_bit);
display("%s %x\n", __func__, *rx_ptr);
} else if (_ch552WA) {
ftdi_read_data(_ftdi, c, nb_bit);
}
}
@ -288,6 +312,8 @@ int FtdiJtag::read_write(unsigned char *tdi, unsigned char *tdo, int len, char l
/* in this case for 1 one it's always bit 7 */
*rx_ptr |= ((c & 0x80) << (7 - nb_bit));
display("%s %x\n", __func__, c);
} else if (_ch552WA) {
ftdi_read_data(_ftdi, c, 1);
}
_state = (_state == SHIFT_DR) ? EXIT1_DR : EXIT1_IR;
}

2
ftdijtag.hpp
View File

@ -54,10 +54,12 @@ class FtdiJtag : public FTDIpp_MPSSE {
void setVerbose(bool verbose){_verbose=verbose;}
private:
void init_internal(FTDIpp_MPSSE::mpsse_bit_config &cable);
int _state;
int _tms_buffer_size;
int _num_tms;
unsigned char *_tms_buffer;
std::string _board_name;
bool _ch552WA;
};
#endif