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
do_fpga_md(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])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 );
101