1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * RK3399: Architecture common definitions
4 *
5 * Copyright (C) 2019 Collabora Inc - https://www.collabora.com/
6 * Rohan Garg <rohan.garg@collabora.com>
7 *
8 * Based on puma-rk3399.c:
9 * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
10 */
11
12 #include <common.h>
13 #include <env.h>
14 #include <dm.h>
15 #include <hash.h>
16 #include <log.h>
17 #include <dm/uclass-internal.h>
18 #include <misc.h>
19 #include <u-boot/crc.h>
20 #include <u-boot/sha256.h>
21
22 #include <asm/arch-rockchip/misc.h>
23
rockchip_setup_macaddr(void)24 int rockchip_setup_macaddr(void)
25 {
26 #if CONFIG_IS_ENABLED(CMD_NET)
27 int ret;
28 const char *cpuid = env_get("cpuid#");
29 u8 hash[SHA256_SUM_LEN];
30 int size = sizeof(hash);
31 u8 mac_addr[6];
32
33 /* Only generate a MAC address, if none is set in the environment */
34 if (env_get("ethaddr"))
35 return 0;
36
37 if (!cpuid) {
38 debug("%s: could not retrieve 'cpuid#'\n", __func__);
39 return -1;
40 }
41
42 ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
43 if (ret) {
44 debug("%s: failed to calculate SHA256\n", __func__);
45 return -1;
46 }
47
48 /* Copy 6 bytes of the hash to base the MAC address on */
49 memcpy(mac_addr, hash, 6);
50
51 /* Make this a valid MAC address and set it */
52 mac_addr[0] &= 0xfe; /* clear multicast bit */
53 mac_addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
54 eth_env_set_enetaddr("ethaddr", mac_addr);
55 #endif
56 return 0;
57 }
58
rockchip_cpuid_from_efuse(const u32 cpuid_offset,const u32 cpuid_length,u8 * cpuid)59 int rockchip_cpuid_from_efuse(const u32 cpuid_offset,
60 const u32 cpuid_length,
61 u8 *cpuid)
62 {
63 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE) || CONFIG_IS_ENABLED(ROCKCHIP_OTP)
64 struct udevice *dev;
65 int ret;
66
67 /* retrieve the device */
68 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
69 ret = uclass_get_device_by_driver(UCLASS_MISC,
70 DM_DRIVER_GET(rockchip_efuse), &dev);
71 #elif CONFIG_IS_ENABLED(ROCKCHIP_OTP)
72 ret = uclass_get_device_by_driver(UCLASS_MISC,
73 DM_DRIVER_GET(rockchip_otp), &dev);
74 #endif
75 if (ret) {
76 debug("%s: could not find efuse device\n", __func__);
77 return -1;
78 }
79
80 /* read the cpu_id range from the efuses */
81 ret = misc_read(dev, cpuid_offset, cpuid, cpuid_length);
82 if (ret) {
83 debug("%s: reading cpuid from the efuses failed\n",
84 __func__);
85 return -1;
86 }
87 #endif
88 return 0;
89 }
90
rockchip_cpuid_set(const u8 * cpuid,const u32 cpuid_length)91 int rockchip_cpuid_set(const u8 *cpuid, const u32 cpuid_length)
92 {
93 u8 low[cpuid_length / 2], high[cpuid_length / 2];
94 char cpuid_str[cpuid_length * 2 + 1];
95 u64 serialno;
96 char serialno_str[17];
97 const char *oldid;
98 int i;
99
100 memset(cpuid_str, 0, sizeof(cpuid_str));
101 for (i = 0; i < 16; i++)
102 sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
103
104 debug("cpuid: %s\n", cpuid_str);
105
106 /*
107 * Mix the cpuid bytes using the same rules as in
108 * ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
109 */
110 for (i = 0; i < 8; i++) {
111 low[i] = cpuid[1 + (i << 1)];
112 high[i] = cpuid[i << 1];
113 }
114
115 serialno = crc32_no_comp(0, low, 8);
116 serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
117 snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno);
118
119 oldid = env_get("cpuid#");
120 if (oldid && strcmp(oldid, cpuid_str) != 0)
121 printf("cpuid: value %s present in env does not match hardware %s\n",
122 oldid, cpuid_str);
123
124 env_set("cpuid#", cpuid_str);
125
126 /* Only generate serial# when none is set yet */
127 if (!env_get("serial#"))
128 env_set("serial#", serialno_str);
129
130 return 0;
131 }
132