virtex2.c

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// SPDX-License-Identifier: GPL-2.0-or-later
 
/***************************************************************************
 *   Copyright (C) 2006 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 ***************************************************************************/
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include "virtex2.h"
#include "xilinx_bit.h"
#include "pld.h"
 
static int virtex2_set_instr(struct jtag_tap *tap, uint32_t new_instr)
{
    if (!tap)
        return ERROR_FAIL;
 
    if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr) {
        struct scan_field field;
 
        field.num_bits = tap->ir_length;
        void *t = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
        field.out_value = t;
        buf_set_u32(t, 0, field.num_bits, new_instr);
        field.in_value = NULL;
 
        jtag_add_ir_scan(tap, &field, TAP_IDLE);
 
        free(t);
    }
 
    return ERROR_OK;
}
 
static int virtex2_send_32(struct pld_device *pld_device,
    int num_words, uint32_t *words)
{
    struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
    struct scan_field scan_field;
    uint8_t *values;
    int i;
 
    values = malloc(num_words * 4);
 
    scan_field.num_bits = num_words * 32;
    scan_field.out_value = values;
    scan_field.in_value = NULL;
 
    for (i = 0; i < num_words; i++)
        buf_set_u32(values + 4 * i, 0, 32, flip_u32(*words++, 32));
 
    virtex2_set_instr(virtex2_info->tap, 0x5);  /* CFG_IN */
 
    jtag_add_dr_scan(virtex2_info->tap, 1, &scan_field, TAP_DRPAUSE);
 
    free(values);
 
    return ERROR_OK;
}
 
static inline void virtexflip32(jtag_callback_data_t arg)
{
    uint8_t *in = (uint8_t *)arg;
    *((uint32_t *)arg) = flip_u32(le_to_h_u32(in), 32);
}
 
static int virtex2_receive_32(struct pld_device *pld_device,
    int num_words, uint32_t *words)
{
    struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
    struct scan_field scan_field;
 
    scan_field.num_bits = 32;
    scan_field.out_value = NULL;
    scan_field.in_value = NULL;
 
    virtex2_set_instr(virtex2_info->tap, 0x4);  /* CFG_OUT */
 
    while (num_words--) {
        scan_field.in_value = (uint8_t *)words;
 
        jtag_add_dr_scan(virtex2_info->tap, 1, &scan_field, TAP_DRPAUSE);
 
        jtag_add_callback(virtexflip32, (jtag_callback_data_t)words);
 
        words++;
    }
 
    return ERROR_OK;
}
 
static int virtex2_read_stat(struct pld_device *pld_device, uint32_t *status)
{
    uint32_t data[5];
 
    jtag_add_tlr();
 
    data[0] = 0xaa995566;   /* synch word */
    data[1] = 0x2800E001;   /* Type 1, read, address 7, 1 word */
    data[2] = 0x20000000;   /* NOOP (Type 1, read, address 0, 0 words */
    data[3] = 0x20000000;   /* NOOP */
    data[4] = 0x20000000;   /* NOOP */
    virtex2_send_32(pld_device, 5, data);
 
    virtex2_receive_32(pld_device, 1, status);
 
    jtag_execute_queue();
 
    LOG_DEBUG("status: 0x%8.8" PRIx32 "", *status);
 
    return ERROR_OK;
}
 
static int virtex2_load(struct pld_device *pld_device, const char *filename)
{
    struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
    struct xilinx_bit_file bit_file;
    int retval;
    unsigned int i;
    struct scan_field field;
 
    field.in_value = NULL;
 
    retval = xilinx_read_bit_file(&bit_file, filename);
    if (retval != ERROR_OK)
        return retval;
 
    virtex2_set_instr(virtex2_info->tap, 0xb);  /* JPROG_B */
    jtag_execute_queue();
    jtag_add_sleep(1000);
 
    virtex2_set_instr(virtex2_info->tap, 0x5);  /* CFG_IN */
    jtag_execute_queue();
 
    for (i = 0; i < bit_file.length; i++)
        bit_file.data[i] = flip_u32(bit_file.data[i], 8);
 
    field.num_bits = bit_file.length * 8;
    field.out_value = bit_file.data;
 
    jtag_add_dr_scan(virtex2_info->tap, 1, &field, TAP_DRPAUSE);
    jtag_execute_queue();
 
    jtag_add_tlr();
 
    if (!(virtex2_info->no_jstart))
        virtex2_set_instr(virtex2_info->tap, 0xc);  /* JSTART */
    jtag_add_runtest(13, TAP_IDLE);
    virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
    virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
    if (!(virtex2_info->no_jstart))
        virtex2_set_instr(virtex2_info->tap, 0xc);  /* JSTART */
    jtag_add_runtest(13, TAP_IDLE);
    virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
    jtag_execute_queue();
 
    xilinx_free_bit_file(&bit_file);
 
    return ERROR_OK;
}
 
COMMAND_HANDLER(virtex2_handle_read_stat_command)
{
    struct pld_device *device;
    uint32_t status;
 
    if (CMD_ARGC < 1)
        return ERROR_COMMAND_SYNTAX_ERROR;
 
    unsigned dev_id;
    COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], dev_id);
    device = get_pld_device_by_num(dev_id);
    if (!device) {
        command_print(CMD, "pld device '#%s' is out of bounds", CMD_ARGV[0]);
        return ERROR_FAIL;
    }
 
    virtex2_read_stat(device, &status);
 
    command_print(CMD, "virtex2 status register: 0x%8.8" PRIx32 "", status);
 
    return ERROR_OK;
}
 
PLD_DEVICE_COMMAND_HANDLER(virtex2_pld_device_command)
{
    struct jtag_tap *tap;
 
    struct virtex2_pld_device *virtex2_info;
 
    if (CMD_ARGC < 2)
        return ERROR_COMMAND_SYNTAX_ERROR;
 
    tap = jtag_tap_by_string(CMD_ARGV[1]);
    if (!tap) {
        command_print(CMD, "Tap: %s does not exist", CMD_ARGV[1]);
        return ERROR_FAIL;
    }
 
    virtex2_info = malloc(sizeof(struct virtex2_pld_device));
    virtex2_info->tap = tap;
 
    virtex2_info->no_jstart = 0;
    if (CMD_ARGC >= 3)
        COMMAND_PARSE_NUMBER(int, CMD_ARGV[2], virtex2_info->no_jstart);
 
    pld->driver_priv = virtex2_info;
 
    return ERROR_OK;
}
 
static const struct command_registration virtex2_exec_command_handlers[] = {
    {
        .name = "read_stat",
        .mode = COMMAND_EXEC,
        .handler = virtex2_handle_read_stat_command,
        .help = "read status register",
        .usage = "pld_num",
    },
    COMMAND_REGISTRATION_DONE
};
static const struct command_registration virtex2_command_handler[] = {
    {
        .name = "virtex2",
        .mode = COMMAND_ANY,
        .help = "Virtex-II specific commands",
        .usage = "",
        .chain = virtex2_exec_command_handlers,
    },
    COMMAND_REGISTRATION_DONE
};
 
struct pld_driver virtex2_pld = {
    .name = "virtex2",
    .commands = virtex2_command_handler,
    .pld_device_command = &virtex2_pld_device_command,
    .load = &virtex2_load,
};