hla_interface.c

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// SPDX-License-Identifier: GPL-2.0-or-later
 
/***************************************************************************
 *   Copyright (C) 2011 by Mathias Kuester                                 *
 *   Mathias Kuester <kesmtp@freenet.de>                                   *
 *                                                                         *
 *   Copyright (C) 2012 by Spencer Oliver                                  *
 *   spen@spen-soft.co.uk                                                  *
 ***************************************************************************/
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
/* project specific includes */
#include <jtag/interface.h>
#include <transport/transport.h>
#include <helper/time_support.h>
 
#include <jtag/hla/hla_layout.h>
#include <jtag/hla/hla_transport.h>
#include <jtag/hla/hla_interface.h>
 
#include <target/target.h>
 
static struct hl_interface hl_if = {
    .param = {
        .device_desc = NULL,
        .vid = { 0 },
        .pid = { 0 },
        .transport = HL_TRANSPORT_UNKNOWN,
        .connect_under_reset = false,
        .use_stlink_tcp = false,
        .stlink_tcp_port = 7184,
    },
    .layout = NULL,
    .handle = NULL,
};
 
int hl_interface_open(enum hl_transports tr)
{
    LOG_DEBUG("hl_interface_open");
 
    enum reset_types jtag_reset_config = jtag_get_reset_config();
 
    if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
        if (jtag_reset_config & RESET_SRST_NO_GATING)
            hl_if.param.connect_under_reset = true;
        else
            LOG_WARNING("\'srst_nogate\' reset_config option is required");
    }
 
    /* set transport mode */
    hl_if.param.transport = tr;
 
    int result = hl_if.layout->open(&hl_if);
    if (result != ERROR_OK)
        return result;
 
    return hl_interface_init_reset();
}
 
int hl_interface_init_target(struct target *t)
{
    int res;
 
    LOG_DEBUG("hl_interface_init_target");
 
    /* this is the interface for the current target and we
     * can setup the private pointer in the tap structure
     * if the interface match the tap idcode
     */
    res = hl_if.layout->api->idcode(hl_if.handle, &t->tap->idcode);
 
    if (res != ERROR_OK)
        return res;
 
    unsigned int ii, limit = t->tap->expected_ids_cnt;
    int found = 0;
 
    for (ii = 0; ii < limit; ii++) {
        uint32_t expected = t->tap->expected_ids[ii];
 
        /* treat "-expected-id 0" as a "don't-warn" wildcard */
        if (!expected || !t->tap->idcode ||
            (t->tap->idcode == expected)) {
            found = 1;
            break;
        }
    }
 
    if (found == 0) {
        LOG_WARNING("UNEXPECTED idcode: 0x%08" PRIx32, t->tap->idcode);
        for (ii = 0; ii < limit; ii++)
            LOG_ERROR("expected %u of %u: 0x%08" PRIx32, ii + 1, limit,
                t->tap->expected_ids[ii]);
 
        return ERROR_FAIL;
    }
 
    t->tap->priv = &hl_if;
    t->tap->has_idcode = true;
 
    return ERROR_OK;
}
 
static int hl_interface_init(void)
{
    LOG_DEBUG("hl_interface_init");
 
    /* here we can initialize the layout */
    return hl_layout_init(&hl_if);
}
 
static int hl_interface_quit(void)
{
    LOG_DEBUG("hl_interface_quit");
 
    if (hl_if.layout->api->close)
        hl_if.layout->api->close(hl_if.handle);
 
    jtag_command_queue_reset();
 
    free((void *)hl_if.param.device_desc);
 
    return ERROR_OK;
}
 
static int hl_interface_reset(int req_trst, int req_srst)
{
    return hl_if.layout->api->assert_srst(hl_if.handle, req_srst ? 0 : 1);
}
 
int hl_interface_init_reset(void)
{
    /* in case the adapter has not already handled asserting srst
     * we will attempt it again */
    if (hl_if.param.connect_under_reset) {
        adapter_assert_reset();
    } else {
        adapter_deassert_reset();
    }
 
    return ERROR_OK;
}
 
static int hl_interface_khz(int khz, int *jtag_speed)
{
    if (!hl_if.layout->api->speed)
        return ERROR_OK;
 
    *jtag_speed = hl_if.layout->api->speed(hl_if.handle, khz, true);
    return ERROR_OK;
}
 
static int hl_interface_speed_div(int speed, int *khz)
{
    *khz = speed;
    return ERROR_OK;
}
 
static int hl_interface_speed(int speed)
{
    if (!hl_if.layout->api->speed)
        return ERROR_OK;
 
    if (!hl_if.handle)
        return ERROR_OK;
 
    hl_if.layout->api->speed(hl_if.handle, speed, false);
 
    return ERROR_OK;
}
 
int hl_interface_override_target(const char **targetname)
{
    if (hl_if.layout->api->override_target) {
        if (hl_if.layout->api->override_target(*targetname)) {
            *targetname = "hla_target";
            return ERROR_OK;
        } else
            return ERROR_FAIL;
    }
    return ERROR_FAIL;
}
 
static int hl_interface_config_trace(bool enabled, enum tpiu_pin_protocol pin_protocol,
        uint32_t port_size, unsigned int *trace_freq,
        unsigned int traceclkin_freq, uint16_t *prescaler)
{
    if (hl_if.layout->api->config_trace)
        return hl_if.layout->api->config_trace(hl_if.handle, enabled,
            pin_protocol, port_size, trace_freq, traceclkin_freq, prescaler);
    else if (enabled) {
        LOG_ERROR("The selected interface does not support tracing");
        return ERROR_FAIL;
    }
 
    return ERROR_OK;
}
 
static int hl_interface_poll_trace(uint8_t *buf, size_t *size)
{
    if (hl_if.layout->api->poll_trace)
        return hl_if.layout->api->poll_trace(hl_if.handle, buf, size);
 
    return ERROR_FAIL;
}
 
COMMAND_HANDLER(hl_interface_handle_device_desc_command)
{
    LOG_DEBUG("hl_interface_handle_device_desc_command");
 
    if (CMD_ARGC == 1) {
        hl_if.param.device_desc = strdup(CMD_ARGV[0]);
    } else {
        LOG_ERROR("expected exactly one argument to hl_device_desc <description>");
    }
 
    return ERROR_OK;
}
 
COMMAND_HANDLER(hl_interface_handle_layout_command)
{
    LOG_DEBUG("hl_interface_handle_layout_command");
 
    if (CMD_ARGC != 1) {
        LOG_ERROR("Need exactly one argument to stlink_layout");
        return ERROR_COMMAND_SYNTAX_ERROR;
    }
 
    if (hl_if.layout) {
        LOG_ERROR("already specified hl_layout %s",
                hl_if.layout->name);
        return (strcmp(hl_if.layout->name, CMD_ARGV[0]) != 0)
            ? ERROR_FAIL : ERROR_OK;
    }
 
    for (const struct hl_layout *l = hl_layout_get_list(); l->name;
         l++) {
        if (strcmp(l->name, CMD_ARGV[0]) == 0) {
            hl_if.layout = l;
            return ERROR_OK;
        }
    }
 
    LOG_ERROR("No adapter layout '%s' found", CMD_ARGV[0]);
    return ERROR_FAIL;
}
 
COMMAND_HANDLER(hl_interface_handle_vid_pid_command)
{
    if (CMD_ARGC > HLA_MAX_USB_IDS * 2) {
        LOG_WARNING("ignoring extra IDs in hla_vid_pid "
            "(maximum is %d pairs)", HLA_MAX_USB_IDS);
        CMD_ARGC = HLA_MAX_USB_IDS * 2;
    }
    if (CMD_ARGC < 2 || (CMD_ARGC & 1)) {
        LOG_WARNING("incomplete hla_vid_pid configuration directive");
        return ERROR_COMMAND_SYNTAX_ERROR;
    }
 
    unsigned int i;
    for (i = 0; i < CMD_ARGC; i += 2) {
        COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i], hl_if.param.vid[i / 2]);
        COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], hl_if.param.pid[i / 2]);
    }
 
    /*
     * Explicitly terminate, in case there are multiple instances of
     * hla_vid_pid.
     */
    hl_if.param.vid[i / 2] = hl_if.param.pid[i / 2] = 0;
 
    return ERROR_OK;
}
 
COMMAND_HANDLER(hl_interface_handle_stlink_backend_command)
{
    /* default values */
    bool use_stlink_tcp = false;
    uint16_t stlink_tcp_port = 7184;
 
    if (CMD_ARGC == 0 || CMD_ARGC > 2)
        return ERROR_COMMAND_SYNTAX_ERROR;
    else if (strcmp(CMD_ARGV[0], "usb") == 0) {
        if (CMD_ARGC > 1)
            return ERROR_COMMAND_SYNTAX_ERROR;
        /* else use_stlink_tcp = false (already the case ) */
    } else if (strcmp(CMD_ARGV[0], "tcp") == 0) {
        use_stlink_tcp = true;
        if (CMD_ARGC == 2)
            COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], stlink_tcp_port);
    } else
        return ERROR_COMMAND_SYNTAX_ERROR;
 
    hl_if.param.use_stlink_tcp = use_stlink_tcp;
    hl_if.param.stlink_tcp_port = stlink_tcp_port;
 
    return ERROR_OK;
}
 
COMMAND_HANDLER(interface_handle_hla_command)
{
    if (CMD_ARGC != 1)
        return ERROR_COMMAND_SYNTAX_ERROR;
 
    if (!hl_if.layout->api->custom_command) {
        LOG_ERROR("The selected adapter doesn't support custom commands");
        return ERROR_FAIL;
    }
 
    hl_if.layout->api->custom_command(hl_if.handle, CMD_ARGV[0]);
 
    return ERROR_OK;
}
 
static const struct command_registration hl_interface_subcommand_handlers[] = {
    {
     .name = "device_desc",
     .handler = &hl_interface_handle_device_desc_command,
     .mode = COMMAND_CONFIG,
     .help = "set the device description of the adapter",
     .usage = "description_string",
     },
    {
     .name = "layout",
     .handler = &hl_interface_handle_layout_command,
     .mode = COMMAND_CONFIG,
     .help = "set the layout of the adapter",
     .usage = "layout_name",
     },
    {
     .name = "vid_pid",
     .handler = &hl_interface_handle_vid_pid_command,
     .mode = COMMAND_CONFIG,
     .help = "the vendor and product ID of the adapter",
     .usage = "(vid pid)*",
     },
    {
     .name = "stlink_backend",
     .handler = &hl_interface_handle_stlink_backend_command,
     .mode = COMMAND_CONFIG,
     .help = "select which ST-Link backend to use",
     .usage = "usb | tcp [port]",
    },
    {
     .name = "command",
     .handler = &interface_handle_hla_command,
     .mode = COMMAND_EXEC,
     .help = "execute a custom adapter-specific command",
     .usage = "<command>",
     },
    COMMAND_REGISTRATION_DONE
};
 
static const struct command_registration hl_interface_command_handlers[] = {
    {
        .name = "hla",
        .mode = COMMAND_ANY,
        .help = "perform hla management",
        .chain = hl_interface_subcommand_handlers,
        .usage = "",
    },
    COMMAND_REGISTRATION_DONE
};
 
struct adapter_driver hl_adapter_driver = {
    .name = "hla",
    .transport_ids = TRANSPORT_HLA_SWD | TRANSPORT_HLA_JTAG,
    .transport_preferred_id = TRANSPORT_HLA_SWD,
    .commands = hl_interface_command_handlers,
 
    .init = hl_interface_init,
    .quit = hl_interface_quit,
    .reset = hl_interface_reset,
    .speed = &hl_interface_speed,
    .khz = &hl_interface_khz,
    .speed_div = &hl_interface_speed_div,
    .config_trace = &hl_interface_config_trace,
    .poll_trace = &hl_interface_poll_trace,
 
    /* no ops for HLA, targets hla_target and stm8 intercept them all */
};