board/theobroma-systems/puma_rk3399/puma-rk3399.c

   1 /*
   2  * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <misc.h>
  10 #include <dm/pinctrl.h>
  11 #include <dm/uclass-internal.h>
  12 #include <asm/setup.h>
  13 #include <asm/arch/periph.h>
  14 #include <power/regulator.h>
  15 #include <spl.h>
  16 #include <u-boot/sha256.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 int board_init(void)
  21 {
  22         int ret;
  23
  24         /*
  25          * We need to call into regulators_enable_boot_on() again, as the call
  26          * during SPL may have not included all regulators.
  27          */
  28         ret = regulators_enable_boot_on(false);
  29         if (ret)
  30                 debug("%s: Cannot enable boot on regulator\n", __func__);
  31
  32         return 0;
  33 }
  34
  35 void spl_board_init(void)
  36 {
  37         preloader_console_init();
  38 }
  39
  40 static void setup_macaddr(void)
  41 {
  42 #if CONFIG_IS_ENABLED(CMD_NET)
  43         int ret;
  44         const char *cpuid = env_get("cpuid#");
  45         u8 hash[SHA256_SUM_LEN];
  46         int size = sizeof(hash);
  47         u8 mac_addr[6];
  48
  49         /* Only generate a MAC address, if none is set in the environment */
  50         if (env_get("ethaddr"))
  51                 return;
  52
  53         if (!cpuid) {
  54                 debug("%s: could not retrieve 'cpuid#'\n", __func__);
  55                 return;
  56         }
  57
  58         ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
  59         if (ret) {
  60                 debug("%s: failed to calculate SHA256\n", __func__);
  61                 return;
  62         }
  63
  64         /* Copy 6 bytes of the hash to base the MAC address on */
  65         memcpy(mac_addr, hash, 6);
  66
  67         /* Make this a valid MAC address and set it */
  68         mac_addr[0] &= 0xfe;  /* clear multicast bit */
  69         mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
  70         eth_env_set_enetaddr("ethaddr", mac_addr);
  71 #endif
  72 }
  73
  74 static void setup_serial(void)
  75 {
  76 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
  77         const u32 cpuid_offset = 0x7;
  78         const u32 cpuid_length = 0x10;
  79
  80         struct udevice *dev;
  81         int ret, i;
  82         u8 cpuid[cpuid_length];
  83         u8 low[cpuid_length/2], high[cpuid_length/2];
  84         char cpuid_str[cpuid_length * 2 + 1];
  85         u64 serialno;
  86         char serialno_str[17];
  87
  88         /* retrieve the device */
  89         ret = uclass_get_device_by_driver(UCLASS_MISC,
  90                                           DM_GET_DRIVER(rockchip_efuse), &dev);
  91         if (ret) {
  92                 debug("%s: could not find efuse device\n", __func__);
  93                 return;
  94         }
  95
  96         /* read the cpu_id range from the efuses */
  97         ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid));
  98         if (ret) {
  99                 debug("%s: reading cpuid from the efuses failed\n",
 100                       __func__);
 101                 return;
 102         }
 103
 104         memset(cpuid_str, 0, sizeof(cpuid_str));
 105         for (i = 0; i < 16; i++)
 106                 sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
 107
 108         debug("cpuid: %s\n", cpuid_str);
 109
 110         /*
 111          * Mix the cpuid bytes using the same rules as in
 112          *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
 113          */
 114         for (i = 0; i < 8; i++) {
 115                 low[i] = cpuid[1 + (i << 1)];
 116                 high[i] = cpuid[i << 1];
 117         }
 118
 119         serialno = crc32_no_comp(0, low, 8);
 120         serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
 121         snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
 122
 123         env_set("cpuid#", cpuid_str);
 124         env_set("serial#", serialno_str);
 125 #endif
 126 }
 127
 128 int misc_init_r(void)
 129 {
 130         setup_serial();
 131         setup_macaddr();
 132
 133         return 0;
 134 }
 135
 136 #ifdef CONFIG_SERIAL_TAG
 137 void get_board_serial(struct tag_serialnr *serialnr)
 138 {
 139         char *serial_string;
 140         u64 serial = 0;
 141
 142         serial_string = env_get("serial#");
 143
 144         if (serial_string)
 145                 serial = simple_strtoull(serial_string, NULL, 16);
 146
 147         serialnr->high = (u32)(serial >> 32);
 148         serialnr->low = (u32)(serial & 0xffffffff);
 149 }
 150 #endif