100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <errno.h>
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#include <misc.h>
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#include <linux/time.h>
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#include <asm/io.h>
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struct altera_sysid_regs {
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u32 id; /* The system build id */
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u32 timestamp; /* Timestamp */
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};
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struct altera_sysid_platdata {
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struct altera_sysid_regs *regs;
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};
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void display_sysid(void)
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{
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struct udevice *dev;
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u32 sysid[2];
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struct tm t;
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char asc[32];
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time_t stamp;
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int ret;
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/* the first misc device will be used */
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ret = uclass_first_device_err(UCLASS_MISC, &dev);
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if (ret)
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return;
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ret = misc_read(dev, 0, &sysid, sizeof(sysid));
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if (ret < 0)
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return;
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stamp = sysid[1];
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localtime_r(&stamp, &t);
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asctime_r(&t, asc);
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printf("SYSID: %08x, %s", sysid[0], asc);
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}
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int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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display_sysid();
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return 0;
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}
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U_BOOT_CMD(
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sysid, 1, 1, do_sysid,
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"display Nios-II system id",
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""
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);
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static int altera_sysid_read(struct udevice *dev,
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int offset, void *buf, int size)
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{
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struct altera_sysid_platdata *plat = dev->platdata;
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struct altera_sysid_regs *const regs = plat->regs;
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u32 *sysid = buf;
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sysid[0] = readl(®s->id);
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sysid[1] = readl(®s->timestamp);
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return 0;
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}
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static int altera_sysid_ofdata_to_platdata(struct udevice *dev)
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{
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struct altera_sysid_platdata *plat = dev_get_platdata(dev);
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plat->regs = map_physmem(devfdt_get_addr(dev),
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sizeof(struct altera_sysid_regs),
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MAP_NOCACHE);
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return 0;
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}
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static const struct misc_ops altera_sysid_ops = {
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.read = altera_sysid_read,
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};
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static const struct udevice_id altera_sysid_ids[] = {
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{ .compatible = "altr,sysid-1.0" },
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{}
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};
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U_BOOT_DRIVER(altera_sysid) = {
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.name = "altera_sysid",
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.id = UCLASS_MISC,
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.of_match = altera_sysid_ids,
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.ofdata_to_platdata = altera_sysid_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct altera_sysid_platdata),
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.ops = &altera_sysid_ops,
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};
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