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         struct udevice *pinctrl, *regulator;
  23         int ret;
  24
  25         /*
  26          * The PWM does not have decicated interrupt number in dts and can
  27          * not get periph_id by pinctrl framework, so let's init them here.
  28          * The PWM2 and PWM3 are for pwm regulators.
  29          */
  30         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
  31         if (ret) {
  32                 debug("%s: Cannot find pinctrl device\n", __func__);
  33                 goto out;
  34         }
  35
  36         ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_PWM2);
  37         if (ret) {
  38                 debug("%s PWM2 pinctrl init fail!\n", __func__);
  39                 goto out;
  40         }
  41
  42         /* rk3399 need to init vdd_center to get the correct output voltage */
  43         ret = regulator_get_by_platname("vdd_center", &regulator);
  44         if (ret)
  45                 debug("%s: Cannot get vdd_center regulator\n", __func__);
  46
  47         ret = regulator_get_by_platname("vcc5v0_host", &regulator);
  48         if (ret) {
  49                 debug("%s vcc5v0_host init fail! ret %d\n", __func__, ret);
  50                 goto out;
  51         }
  52
  53         ret = regulator_set_enable(regulator, true);
  54         if (ret) {
  55                 debug("%s vcc5v0-host-en set fail!\n", __func__);
  56                 goto out;
  57         }
  58
  59 out:
  60         return 0;
  61 }
  62
  63 void spl_board_init(void)
  64 {
  65         preloader_console_init();
  66 }
  67
  68 static void setup_macaddr(void)
  69 {
  70 #if CONFIG_IS_ENABLED(CMD_NET)
  71         int ret;
  72         const char *cpuid = env_get("cpuid#");
  73         u8 hash[SHA256_SUM_LEN];
  74         int size = sizeof(hash);
  75         u8 mac_addr[6];
  76
  77         /* Only generate a MAC address, if none is set in the environment */
  78         if (env_get("ethaddr"))
  79                 return;
  80
  81         if (!cpuid) {
  82                 debug("%s: could not retrieve 'cpuid#'\n", __func__);
  83                 return;
  84         }
  85
  86         ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
  87         if (ret) {
  88                 debug("%s: failed to calculate SHA256\n", __func__);
  89                 return;
  90         }
  91
  92         /* Copy 6 bytes of the hash to base the MAC address on */
  93         memcpy(mac_addr, hash, 6);
  94
  95         /* Make this a valid MAC address and set it */
  96         mac_addr[0] &= 0xfe;  /* clear multicast bit */
  97         mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
  98         eth_env_set_enetaddr("ethaddr", mac_addr);
  99 #endif
 100 }
 101
 102 static void setup_serial(void)
 103 {
 104 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
 105         const u32 cpuid_offset = 0x7;
 106         const u32 cpuid_length = 0x10;
 107
 108         struct udevice *dev;
 109         int ret, i;
 110         u8 cpuid[cpuid_length];
 111         u8 low[cpuid_length/2], high[cpuid_length/2];
 112         char cpuid_str[cpuid_length * 2 + 1];
 113         u64 serialno;
 114         char serialno_str[17];
 115
 116         /* retrieve the device */
 117         ret = uclass_get_device_by_driver(UCLASS_MISC,
 118                                           DM_GET_DRIVER(rockchip_efuse), &dev);
 119         if (ret) {
 120                 debug("%s: could not find efuse device\n", __func__);
 121                 return;
 122         }
 123
 124         /* read the cpu_id range from the efuses */
 125         ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid));
 126         if (ret) {
 127                 debug("%s: reading cpuid from the efuses failed\n",
 128                       __func__);
 129                 return;
 130         }
 131
 132         memset(cpuid_str, 0, sizeof(cpuid_str));
 133         for (i = 0; i < 16; i++)
 134                 sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
 135
 136         debug("cpuid: %s\n", cpuid_str);
 137
 138         /*
 139          * Mix the cpuid bytes using the same rules as in
 140          *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
 141          */
 142         for (i = 0; i < 8; i++) {
 143                 low[i] = cpuid[1 + (i << 1)];
 144                 high[i] = cpuid[i << 1];
 145         }
 146
 147         serialno = crc32_no_comp(0, low, 8);
 148         serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
 149         snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
 150
 151         env_set("cpuid#", cpuid_str);
 152         env_set("serial#", serialno_str);
 153 #endif
 154 }
 155
 156 int misc_init_r(void)
 157 {
 158         setup_serial();
 159         setup_macaddr();
 160
 161         return 0;
 162 }
 163
 164 #ifdef CONFIG_SERIAL_TAG
 165 void get_board_serial(struct tag_serialnr *serialnr)
 166 {
 167         char *serial_string;
 168         u64 serial = 0;
 169
 170         serial_string = env_get("serial#");
 171
 172         if (serial_string)
 173                 serial = simple_strtoull(serial_string, NULL, 16);
 174
 175         serialnr->high = (u32)(serial >> 32);
 176         serialnr->low = (u32)(serial & 0xffffffff);
 177 }
 178 #endif