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         int  ret;
  38
  39         /*
  40          * Turning the eMMC and SPI back on (if disabled via the Qseven
  41          * BIOS_ENABLE) signal is done through a always-on regulator).
  42          */
  43         ret = regulators_enable_boot_on(false);
  44         if (ret)
  45                 debug("%s: Cannot enable boot on regulator\n", __func__);
  46
  47         preloader_console_init();
  48 }
  49
  50 static void setup_macaddr(void)
  51 {
  52 #if CONFIG_IS_ENABLED(CMD_NET)
  53         int ret;
  54         const char *cpuid = env_get("cpuid#");
  55         u8 hash[SHA256_SUM_LEN];
  56         int size = sizeof(hash);
  57         u8 mac_addr[6];
  58
  59         /* Only generate a MAC address, if none is set in the environment */
  60         if (env_get("ethaddr"))
  61                 return;
  62
  63         if (!cpuid) {
  64                 debug("%s: could not retrieve 'cpuid#'\n", __func__);
  65                 return;
  66         }
  67
  68         ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
  69         if (ret) {
  70                 debug("%s: failed to calculate SHA256\n", __func__);
  71                 return;
  72         }
  73
  74         /* Copy 6 bytes of the hash to base the MAC address on */
  75         memcpy(mac_addr, hash, 6);
  76
  77         /* Make this a valid MAC address and set it */
  78         mac_addr[0] &= 0xfe;  /* clear multicast bit */
  79         mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
  80         eth_env_set_enetaddr("ethaddr", mac_addr);
  81 #endif
  82 }
  83
  84 static void setup_serial(void)
  85 {
  86 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
  87         const u32 cpuid_offset = 0x7;
  88         const u32 cpuid_length = 0x10;
  89
  90         struct udevice *dev;
  91         int ret, i;
  92         u8 cpuid[cpuid_length];
  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
  98         /* retrieve the device */
  99         ret = uclass_get_device_by_driver(UCLASS_MISC,
 100                                           DM_GET_DRIVER(rockchip_efuse), &dev);
 101         if (ret) {
 102                 debug("%s: could not find efuse device\n", __func__);
 103                 return;
 104         }
 105
 106         /* read the cpu_id range from the efuses */
 107         ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid));
 108         if (ret) {
 109                 debug("%s: reading cpuid from the efuses failed\n",
 110                       __func__);
 111                 return;
 112         }
 113
 114         memset(cpuid_str, 0, sizeof(cpuid_str));
 115         for (i = 0; i < 16; i++)
 116                 sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
 117
 118         debug("cpuid: %s\n", cpuid_str);
 119
 120         /*
 121          * Mix the cpuid bytes using the same rules as in
 122          *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
 123          */
 124         for (i = 0; i < 8; i++) {
 125                 low[i] = cpuid[1 + (i << 1)];
 126                 high[i] = cpuid[i << 1];
 127         }
 128
 129         serialno = crc32_no_comp(0, low, 8);
 130         serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
 131         snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
 132
 133         env_set("cpuid#", cpuid_str);
 134         env_set("serial#", serialno_str);
 135 #endif
 136 }
 137
 138 int misc_init_r(void)
 139 {
 140         setup_serial();
 141         setup_macaddr();
 142
 143         return 0;
 144 }
 145
 146 #ifdef CONFIG_SERIAL_TAG
 147 void get_board_serial(struct tag_serialnr *serialnr)
 148 {
 149         char *serial_string;
 150         u64 serial = 0;
 151
 152         serial_string = env_get("serial#");
 153
 154         if (serial_string)
 155                 serial = simple_strtoull(serial_string, NULL, 16);
 156
 157         serialnr->high = (u32)(serial >> 32);
 158         serialnr->low = (u32)(serial & 0xffffffff);
 159 }
 160 #endif