1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
4 * Scott McNutt <smcnutt@psyent.com>
5 */
6
7 #include <common.h>
8 #include <command.h>
9 #include <dm.h>
10 #include <errno.h>
11 #include <misc.h>
12 #include <linux/time.h>
13 #include <asm/io.h>
14
15 struct altera_sysid_regs {
16 u32 id; /* The system build id */
17 u32 timestamp; /* Timestamp */
18 };
19
20 struct altera_sysid_platdata {
21 struct altera_sysid_regs *regs;
22 };
23
display_sysid(void)24 void display_sysid(void)
25 {
26 struct udevice *dev;
27 u32 sysid[2];
28 struct tm t;
29 char asc[32];
30 time_t stamp;
31 int ret;
32
33 /* the first misc device will be used */
34 ret = uclass_first_device_err(UCLASS_MISC, &dev);
35 if (ret)
36 return;
37 ret = misc_read(dev, 0, &sysid, sizeof(sysid));
38 if (ret < 0)
39 return;
40
41 stamp = sysid[1];
42 localtime_r(&stamp, &t);
43 asctime_r(&t, asc);
44 printf("SYSID: %08x, %s", sysid[0], asc);
45 }
46
do_sysid(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])47 int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
48 {
49 display_sysid();
50 return 0;
51 }
52
53 U_BOOT_CMD(
54 sysid, 1, 1, do_sysid,
55 "display Nios-II system id",
56 ""
57 );
58
altera_sysid_read(struct udevice * dev,int offset,void * buf,int size)59 static int altera_sysid_read(struct udevice *dev,
60 int offset, void *buf, int size)
61 {
62 struct altera_sysid_platdata *plat = dev->platdata;
63 struct altera_sysid_regs *const regs = plat->regs;
64 u32 *sysid = buf;
65
66 sysid[0] = readl(®s->id);
67 sysid[1] = readl(®s->timestamp);
68
69 return 0;
70 }
71
altera_sysid_ofdata_to_platdata(struct udevice * dev)72 static int altera_sysid_ofdata_to_platdata(struct udevice *dev)
73 {
74 struct altera_sysid_platdata *plat = dev_get_platdata(dev);
75
76 plat->regs = map_physmem(devfdt_get_addr(dev),
77 sizeof(struct altera_sysid_regs),
78 MAP_NOCACHE);
79
80 return 0;
81 }
82
83 static const struct misc_ops altera_sysid_ops = {
84 .read = altera_sysid_read,
85 };
86
87 static const struct udevice_id altera_sysid_ids[] = {
88 { .compatible = "altr,sysid-1.0" },
89 {}
90 };
91
92 U_BOOT_DRIVER(altera_sysid) = {
93 .name = "altera_sysid",
94 .id = UCLASS_MISC,
95 .of_match = altera_sysid_ids,
96 .ofdata_to_platdata = altera_sysid_ofdata_to_platdata,
97 .platdata_auto_alloc_size = sizeof(struct altera_sysid_platdata),
98 .ops = &altera_sysid_ops,
99 };
100