xref: /openbmc/u-boot/drivers/misc/altera_sysid.c (revision 5830791d91d1200854ef78fcb32f808c8080f0f0)
183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
2ca844dd8SThomas Chou /*
3ca844dd8SThomas Chou  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
4ca844dd8SThomas Chou  * Scott McNutt <smcnutt@psyent.com>
5ca844dd8SThomas Chou  */
6ca844dd8SThomas Chou 
7ca844dd8SThomas Chou #include <common.h>
8ca844dd8SThomas Chou #include <command.h>
9ca844dd8SThomas Chou #include <dm.h>
10ca844dd8SThomas Chou #include <errno.h>
11ca844dd8SThomas Chou #include <misc.h>
12ca844dd8SThomas Chou #include <linux/time.h>
13ca844dd8SThomas Chou #include <asm/io.h>
14ca844dd8SThomas Chou 
15ca844dd8SThomas Chou struct altera_sysid_regs {
16ca844dd8SThomas Chou 	u32	id;		/* The system build id */
17ca844dd8SThomas Chou 	u32	timestamp;	/* Timestamp */
18ca844dd8SThomas Chou };
19ca844dd8SThomas Chou 
20ca844dd8SThomas Chou struct altera_sysid_platdata {
21ca844dd8SThomas Chou 	struct altera_sysid_regs *regs;
22ca844dd8SThomas Chou };
23ca844dd8SThomas Chou 
display_sysid(void)24ca844dd8SThomas Chou void display_sysid(void)
25ca844dd8SThomas Chou {
26ca844dd8SThomas Chou 	struct udevice *dev;
27ca844dd8SThomas Chou 	u32 sysid[2];
28ca844dd8SThomas Chou 	struct tm t;
29ca844dd8SThomas Chou 	char asc[32];
30ca844dd8SThomas Chou 	time_t stamp;
31ca844dd8SThomas Chou 	int ret;
32ca844dd8SThomas Chou 
33ca844dd8SThomas Chou 	/* the first misc device will be used */
343f603cbbSSimon Glass 	ret = uclass_first_device_err(UCLASS_MISC, &dev);
35ca844dd8SThomas Chou 	if (ret)
36ca844dd8SThomas Chou 		return;
37ca844dd8SThomas Chou 	ret = misc_read(dev, 0, &sysid, sizeof(sysid));
38*8729b1aeSSimon Glass 	if (ret < 0)
39ca844dd8SThomas Chou 		return;
40ca844dd8SThomas Chou 
41ca844dd8SThomas Chou 	stamp = sysid[1];
42ca844dd8SThomas Chou 	localtime_r(&stamp, &t);
43ca844dd8SThomas Chou 	asctime_r(&t, asc);
44ca844dd8SThomas Chou 	printf("SYSID: %08x, %s", sysid[0], asc);
45ca844dd8SThomas Chou }
46ca844dd8SThomas Chou 
do_sysid(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])47ca844dd8SThomas Chou int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
48ca844dd8SThomas Chou {
49ca844dd8SThomas Chou 	display_sysid();
50ca844dd8SThomas Chou 	return 0;
51ca844dd8SThomas Chou }
52ca844dd8SThomas Chou 
53ca844dd8SThomas Chou U_BOOT_CMD(
54ca844dd8SThomas Chou 	sysid,	1,	1,	do_sysid,
55ca844dd8SThomas Chou 	"display Nios-II system id",
56ca844dd8SThomas Chou 	""
57ca844dd8SThomas Chou );
58ca844dd8SThomas Chou 
altera_sysid_read(struct udevice * dev,int offset,void * buf,int size)59ca844dd8SThomas Chou static int altera_sysid_read(struct udevice *dev,
60ca844dd8SThomas Chou 			     int offset, void *buf, int size)
61ca844dd8SThomas Chou {
62ca844dd8SThomas Chou 	struct altera_sysid_platdata *plat = dev->platdata;
63ca844dd8SThomas Chou 	struct altera_sysid_regs *const regs = plat->regs;
64ca844dd8SThomas Chou 	u32 *sysid = buf;
65ca844dd8SThomas Chou 
66ca844dd8SThomas Chou 	sysid[0] = readl(&regs->id);
67ca844dd8SThomas Chou 	sysid[1] = readl(&regs->timestamp);
68ca844dd8SThomas Chou 
69ca844dd8SThomas Chou 	return 0;
70ca844dd8SThomas Chou }
71ca844dd8SThomas Chou 
altera_sysid_ofdata_to_platdata(struct udevice * dev)72ca844dd8SThomas Chou static int altera_sysid_ofdata_to_platdata(struct udevice *dev)
73ca844dd8SThomas Chou {
74ca844dd8SThomas Chou 	struct altera_sysid_platdata *plat = dev_get_platdata(dev);
75ca844dd8SThomas Chou 
76a821c4afSSimon Glass 	plat->regs = map_physmem(devfdt_get_addr(dev),
779cbb923bSThomas Chou 				 sizeof(struct altera_sysid_regs),
789cbb923bSThomas Chou 				 MAP_NOCACHE);
79ca844dd8SThomas Chou 
80ca844dd8SThomas Chou 	return 0;
81ca844dd8SThomas Chou }
82ca844dd8SThomas Chou 
83ca844dd8SThomas Chou static const struct misc_ops altera_sysid_ops = {
84ca844dd8SThomas Chou 	.read = altera_sysid_read,
85ca844dd8SThomas Chou };
86ca844dd8SThomas Chou 
87ca844dd8SThomas Chou static const struct udevice_id altera_sysid_ids[] = {
88687dbff2SThomas Chou 	{ .compatible = "altr,sysid-1.0" },
89ca844dd8SThomas Chou 	{}
90ca844dd8SThomas Chou };
91ca844dd8SThomas Chou 
92ca844dd8SThomas Chou U_BOOT_DRIVER(altera_sysid) = {
93ca844dd8SThomas Chou 	.name	= "altera_sysid",
94ca844dd8SThomas Chou 	.id	= UCLASS_MISC,
95ca844dd8SThomas Chou 	.of_match = altera_sysid_ids,
96ca844dd8SThomas Chou 	.ofdata_to_platdata = altera_sysid_ofdata_to_platdata,
97ca844dd8SThomas Chou 	.platdata_auto_alloc_size = sizeof(struct altera_sysid_platdata),
98ca844dd8SThomas Chou 	.ops	= &altera_sysid_ops,
99ca844dd8SThomas Chou };
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