cmd/fpgad.c

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