usbtoswd.c

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// SPDX-License-Identifier: GPL-2.0-or-later
 
/***************************************************************************
 *   Copyright (C) 2009 - 2010 by Simon Qian <SimonQian@SimonQian.com>     *
 ***************************************************************************/
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include <stdlib.h>
#include <string.h>
 
#include "../versaloon_include.h"
#include "../versaloon.h"
#include "../versaloon_internal.h"
#include "usbtoxxx.h"
#include "usbtoxxx_internal.h"
 
static RESULT usbtoswd_read_callback(void *p, uint8_t *src, uint8_t *processed)
{
    struct versaloon_pending_t *pending = (struct versaloon_pending_t *)p;
 
    if (pending->extra_data)
        *((uint8_t *)pending->extra_data) = src[0];
 
    return ERROR_OK;
}
 
static RESULT usbtoswd_write_callback(void *p, uint8_t *src, uint8_t *processed)
{
    struct versaloon_pending_t *pending = (struct versaloon_pending_t *)p;
 
    if (pending->extra_data)
        *((uint8_t *)pending->extra_data) = src[0];
 
    /* mark it processed to ignore other input data */
    *processed = 1;
    return ERROR_OK;
}
 
RESULT usbtoswd_init(uint8_t interface_index)
{
    return usbtoxxx_init_command(USB_TO_SWD, interface_index);
}
 
RESULT usbtoswd_fini(uint8_t interface_index)
{
    return usbtoxxx_fini_command(USB_TO_SWD, interface_index);
}
 
RESULT usbtoswd_config(uint8_t interface_index, uint8_t trn, uint16_t retry,
    uint16_t dly)
{
    uint8_t cfg_buf[5];
 
#if PARAM_CHECK
    if (interface_index > 7) {
        LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
        return ERROR_FAIL;
    }
#endif
 
    cfg_buf[0] = trn;
    SET_LE_U16(&cfg_buf[1], retry);
    SET_LE_U16(&cfg_buf[3], dly);
 
    return usbtoxxx_conf_command(USB_TO_SWD, interface_index, cfg_buf, 5);
}
 
RESULT usbtoswd_seqout(uint8_t interface_index, const uint8_t *data,
    uint16_t bitlen)
{
    uint16_t bytelen = (bitlen + 7) >> 3;
 
#if PARAM_CHECK
    if (interface_index > 7) {
        LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
        return ERROR_FAIL;
    }
#endif
 
    SET_LE_U16(&versaloon_cmd_buf[0], bitlen);
    memcpy(versaloon_cmd_buf + 2, data, bytelen);
 
    return usbtoxxx_out_command(USB_TO_SWD, interface_index,
        versaloon_cmd_buf, bytelen + 2, 0);
}
 
RESULT usbtoswd_seqin(uint8_t interface_index, uint8_t *data, uint16_t bitlen)
{
    uint16_t bytelen = (bitlen + 7) >> 3;
    uint8_t buff[2];
 
#if PARAM_CHECK
    if (interface_index > 7) {
        LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
        return ERROR_FAIL;
    }
#endif
 
    SET_LE_U16(&buff[0], bitlen);
 
    return usbtoxxx_in_command(USB_TO_SWD, interface_index, buff, 2, bytelen,
        data, 0, bytelen, 0);
}
 
RESULT usbtoswd_transact(uint8_t interface_index, uint8_t request,
    uint32_t *data, uint8_t *ack)
{
    uint8_t parity;
    uint8_t buff[5];
 
#if PARAM_CHECK
    if (interface_index > 7) {
        LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
        return ERROR_FAIL;
    }
#endif
 
    parity = (request >> 1) & 1;
    parity += (request >> 2) & 1;
    parity += (request >> 3) & 1;
    parity += (request >> 4) & 1;
    parity &= 1;
    buff[0] = (request | 0x81 | (parity << 5)) & ~0x40;
    if (data)
        SET_LE_U32(&buff[1], *data);
    else
        memset(buff + 1, 0, 4);
 
    versaloon_set_extra_data(ack);
    if (request & 0x04) {
        /* read */
        versaloon_set_callback(usbtoswd_read_callback);
    } else {
        /* write */
        versaloon_set_callback(usbtoswd_write_callback);
    }
 
    /* Input buffer must be passed even for write operations. Otherwise
     * the callback function is not called and ack value is not set. */
    return usbtoxxx_inout_command(USB_TO_SWD, interface_index, buff, 5, 5,
        (uint8_t *)data, 1, 4, 0);
}