LXR uboot/cmd/fpgad.c

   1/*
   2 * (C) Copyright 2013
   3 * Dirk Eibach,  Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
   4 *
   5 * based on cmd_mem.c
   6 * (C) Copyright 2000
   7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8 *
   9 * SPDX-License-Identifier:     GPL-2.0+
  10 */
  11
  12#include <common.h>
  13#include <command.h>
  14#include <console.h>
  15
  16#include <gdsys_fpga.h>
  17
  18static uint     dp_last_fpga;
  19static uint     dp_last_addr;
  20static uint     dp_last_length = 0x40;
  21
  22/*
  23 * FPGA Memory Display
  24 *
  25 * Syntax:
  26 *      fpgad {fpga} {addr} {len}
  27 */
  28#define DISP_LINE_LEN   16
  29int do_fpga_md(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  30{
  31        unsigned int k;
  32        unsigned int fpga;
  33        ulong   addr, length;
  34        int rc = 0;
  35        u16 linebuf[DISP_LINE_LEN/sizeof(u16)];
  36        ulong nbytes;
  37
  38        /*
  39         * We use the last specified parameters, unless new ones are
  40         * entered.
  41         */
  42        fpga = dp_last_fpga;
  43        addr = dp_last_addr;
  44        length = dp_last_length;
  45
  46        if (argc < 3)
  47                return CMD_RET_USAGE;
  48
  49        if ((flag & CMD_FLAG_REPEAT) == 0) {
  50                /*
  51                 * FPGA is specified since argc > 2
  52                 */
  53                fpga = simple_strtoul(argv[1], NULL, 16);
  54
  55                /*
  56                 * Address is specified since argc > 2
  57                 */
  58                addr = simple_strtoul(argv[2], NULL, 16);
  59
  60                /*
  61                 * If another parameter, it is the length to display.
  62                 * Length is the number of objects, not number of bytes.
  63                 */
  64                if (argc > 3)
  65                        length = simple_strtoul(argv[3], NULL, 16);
  66        }
  67
  68        nbytes = length * sizeof(u16);
  69        do {
  70                ulong linebytes = (nbytes > DISP_LINE_LEN) ?
  71                                  DISP_LINE_LEN : nbytes;
  72
  73                for (k = 0; k < linebytes / sizeof(u16); ++k)
  74                        fpga_get_reg(fpga,
  75                                     (u16 *)fpga_ptr[fpga] + addr
  76                                     / sizeof(u16) + k,
  77                                     addr + k * sizeof(u16),
  78                                     &linebuf[k]);
  79                print_buffer(addr, (void *)linebuf, sizeof(u16),
  80                             linebytes / sizeof(u16),
  81                             DISP_LINE_LEN / sizeof(u16));
  82
  83                nbytes -= linebytes;
  84                addr += linebytes;
  85                if (ctrlc()) {
  86                        rc = 1;
  87                        break;
  88                }
  89        } while (nbytes > 0);
  90
  91        dp_last_fpga = fpga;
  92        dp_last_addr = addr;
  93        dp_last_length = length;
  94        return rc;
  95}
  96
  97U_BOOT_CMD(
  98        fpgad,  4,      1,      do_fpga_md,
  99        "fpga register display",
 100        "fpga address [# of objects]"
 101);
 102