xref: /openbmc/u-boot/cmd/fpgad.c (revision 7ffe3cd6)
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 );
102