1 /* 2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com> 3 * Scott McNutt <smcnutt@psyent.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <command.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <misc.h> 13 #include <linux/time.h> 14 #include <asm/io.h> 15 16 struct altera_sysid_regs { 17 u32 id; /* The system build id */ 18 u32 timestamp; /* Timestamp */ 19 }; 20 21 struct altera_sysid_platdata { 22 struct altera_sysid_regs *regs; 23 }; 24 25 void display_sysid(void) 26 { 27 struct udevice *dev; 28 u32 sysid[2]; 29 struct tm t; 30 char asc[32]; 31 time_t stamp; 32 int ret; 33 34 /* the first misc device will be used */ 35 ret = uclass_first_device(UCLASS_MISC, &dev); 36 if (ret) 37 return; 38 if (!dev) 39 return; 40 ret = misc_read(dev, 0, &sysid, sizeof(sysid)); 41 if (ret) 42 return; 43 44 stamp = sysid[1]; 45 localtime_r(&stamp, &t); 46 asctime_r(&t, asc); 47 printf("SYSID: %08x, %s", sysid[0], asc); 48 } 49 50 int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 51 { 52 display_sysid(); 53 return 0; 54 } 55 56 U_BOOT_CMD( 57 sysid, 1, 1, do_sysid, 58 "display Nios-II system id", 59 "" 60 ); 61 62 static int altera_sysid_read(struct udevice *dev, 63 int offset, void *buf, int size) 64 { 65 struct altera_sysid_platdata *plat = dev->platdata; 66 struct altera_sysid_regs *const regs = plat->regs; 67 u32 *sysid = buf; 68 69 sysid[0] = readl(®s->id); 70 sysid[1] = readl(®s->timestamp); 71 72 return 0; 73 } 74 75 static int altera_sysid_ofdata_to_platdata(struct udevice *dev) 76 { 77 struct altera_sysid_platdata *plat = dev_get_platdata(dev); 78 79 plat->regs = map_physmem(dev_get_addr(dev), 80 sizeof(struct altera_sysid_regs), 81 MAP_NOCACHE); 82 83 return 0; 84 } 85 86 static const struct misc_ops altera_sysid_ops = { 87 .read = altera_sysid_read, 88 }; 89 90 static const struct udevice_id altera_sysid_ids[] = { 91 { .compatible = "altr,sysid-1.0" }, 92 {} 93 }; 94 95 U_BOOT_DRIVER(altera_sysid) = { 96 .name = "altera_sysid", 97 .id = UCLASS_MISC, 98 .of_match = altera_sysid_ids, 99 .ofdata_to_platdata = altera_sysid_ofdata_to_platdata, 100 .platdata_auto_alloc_size = sizeof(struct altera_sysid_platdata), 101 .ops = &altera_sysid_ops, 102 }; 103