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Add MPSSE communications layer for FTDI chips

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This is a higher-level libftdi replacement for use when implementing
protocol drivers for FT2232, FT2232H or FT4232H. It takes care of device
open/close and, unlike libftdi, also MPSSE command abstraction, command
queueing, buffer handling and return data parsing.

The FTDI device is accessed through libusb-1.0 in asynchronous mode.

Change-Id: I051adb574dcc39f8ca9cd7f6dbe6ae4aeea5f4c8
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/451
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
Reviewed-by: Peter Stuge <peter@stuge.se>
This commit is contained in:
Andreas Fritiofson
2012-01-30 00:16:41 +01:00
committed by Peter Stuge
parent 2aab7d3ce2
commit b598efb613
2 changed files with 917 additions and 0 deletions
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src/jtag/drivers/mpsse.c Normal file
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/**************************************************************************
* Copyright (C) 2012 by Andreas Fritiofson *
* andreas.fritiofson@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef MPSSE_H_
#define MPSSE_H_
#include <stdbool.h>
#include "helper/binarybuffer.h"
/* Mode flags */
#define POS_EDGE_OUT 0x00
#define NEG_EDGE_OUT 0x01
#define POS_EDGE_IN 0x00
#define NEG_EDGE_IN 0x04
#define MSB_FIRST 0x00
#define LSB_FIRST 0x08
enum ftdi_chip_type {
TYPE_FT2232C,
TYPE_FT2232H,
TYPE_FT4232H,
};
struct mpsse_ctx;
/* Device handling */
struct mpsse_ctx *mpsse_open(const uint16_t *vid, const uint16_t *pid, const char *description,
const char *serial, int channel);
void mpsse_close(struct mpsse_ctx *ctx);
bool mpsse_is_high_speed(struct mpsse_ctx *ctx);
/* Command queuing. These correspond to the MPSSE commands with the same names, but no need to care
* about bit/byte transfer or data length limitation. Read data is guaranteed to be available only
* after the following mpsse_flush(). */
int mpsse_clock_data_out(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset,
unsigned length, uint8_t mode);
int mpsse_clock_data_in(struct mpsse_ctx *ctx, uint8_t *in, unsigned in_offset, unsigned length,
uint8_t mode);
int mpsse_clock_data(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset, uint8_t *in,
unsigned in_offset, unsigned length, uint8_t mode);
int mpsse_clock_tms_cs_out(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset,
unsigned length, bool tdi, uint8_t mode);
int mpsse_clock_tms_cs(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset, uint8_t *in,
unsigned in_offset, unsigned length, bool tdi, uint8_t mode);
int mpsse_set_data_bits_low_byte(struct mpsse_ctx *ctx, uint8_t data, uint8_t dir);
int mpsse_set_data_bits_high_byte(struct mpsse_ctx *ctx, uint8_t data, uint8_t dir);
int mpsse_read_data_bits_low_byte(struct mpsse_ctx *ctx, uint8_t *data);
int mpsse_read_data_bits_high_byte(struct mpsse_ctx *ctx, uint8_t *data);
int mpsse_loopback_config(struct mpsse_ctx *ctx, bool enable);
int mpsse_set_divisor(struct mpsse_ctx *ctx, uint16_t divisor);
int mpsse_divide_by_5_config(struct mpsse_ctx *ctx, bool enable);
int mpsse_rtck_config(struct mpsse_ctx *ctx, bool enable);
/* Helper to set frequency in Hertz. Returns actual realizable frequency or negative error.
* Frequency 0 means RTCK. */
int mpsse_set_frequency(struct mpsse_ctx *ctx, int frequency);
/* Queue handling */
int mpsse_flush(struct mpsse_ctx *ctx);
void mpsse_purge(struct mpsse_ctx *ctx);
#endif /* MPSSE_H_ */