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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
18 static uint dp_last_fpga;
19 static uint dp_last_addr;
20 static 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
29 int 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
97 U_BOOT_CMD(
98 fpgad, 4, 1, do_fpga_md,
99 "fpga register display",
100 "fpga address [# of objects]"
101 );