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 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) 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 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 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 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