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_err(UCLASS_MISC, &dev); 36 if (ret) 37 return; 38 ret = misc_read(dev, 0, &sysid, sizeof(sysid)); 39 if (ret) 40 return; 41 42 stamp = sysid[1]; 43 localtime_r(&stamp, &t); 44 asctime_r(&t, asc); 45 printf("SYSID: %08x, %s", sysid[0], asc); 46 } 47 48 int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 49 { 50 display_sysid(); 51 return 0; 52 } 53 54 U_BOOT_CMD( 55 sysid, 1, 1, do_sysid, 56 "display Nios-II system id", 57 "" 58 ); 59 60 static int altera_sysid_read(struct udevice *dev, 61 int offset, void *buf, int size) 62 { 63 struct altera_sysid_platdata *plat = dev->platdata; 64 struct altera_sysid_regs *const regs = plat->regs; 65 u32 *sysid = buf; 66 67 sysid[0] = readl(®s->id); 68 sysid[1] = readl(®s->timestamp); 69 70 return 0; 71 } 72 73 static int altera_sysid_ofdata_to_platdata(struct udevice *dev) 74 { 75 struct altera_sysid_platdata *plat = dev_get_platdata(dev); 76 77 plat->regs = map_physmem(dev_get_addr(dev), 78 sizeof(struct altera_sysid_regs), 79 MAP_NOCACHE); 80 81 return 0; 82 } 83 84 static const struct misc_ops altera_sysid_ops = { 85 .read = altera_sysid_read, 86 }; 87 88 static const struct udevice_id altera_sysid_ids[] = { 89 { .compatible = "altr,sysid-1.0" }, 90 {} 91 }; 92 93 U_BOOT_DRIVER(altera_sysid) = { 94 .name = "altera_sysid", 95 .id = UCLASS_MISC, 96 .of_match = altera_sysid_ids, 97 .ofdata_to_platdata = altera_sysid_ofdata_to_platdata, 98 .platdata_auto_alloc_size = sizeof(struct altera_sysid_platdata), 99 .ops = &altera_sysid_ops, 100 }; 101