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[u-boot] / 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
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 );