board/toradex/verdin-imx8mm/verdin-imx8mm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2020 Toradex
   4  */
   5
   6 #include <common.h>
   7 #include <init.h>
   8 #include <asm/arch/clock.h>
   9 #include <asm/arch/sys_proto.h>
  10 #include <asm/io.h>
  11 #include <i2c.h>
  12 #include <miiphy.h>
  13 #include <netdev.h>
  14 #include <micrel.h>
  15
  16 #include "../common/tdx-cfg-block.h"
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 #define I2C_PMIC        0
  21
  22 enum pcb_rev_t {
  23         PCB_VERSION_1_0,
  24         PCB_VERSION_1_1
  25 };
  26
  27 #if IS_ENABLED(CONFIG_FEC_MXC)
  28 static int setup_fec(void)
  29 {
  30         struct iomuxc_gpr_base_regs *gpr =
  31                 (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
  32
  33         /* Use 125M anatop REF_CLK1 for ENET1, not from external */
  34         clrsetbits_le32(&gpr->gpr[1], 0x2000, 0);
  35
  36         return 0;
  37 }
  38
  39 int board_phy_config(struct phy_device *phydev)
  40 {
  41         int tmp;
  42
  43         switch (ksz9xx1_phy_get_id(phydev) & MII_KSZ9x31_SILICON_REV_MASK) {
  44         case PHY_ID_KSZ9031:
  45                 /*
  46                  * The PHY adds 1.2ns for the RXC and 0ns for TXC clock by
  47                  * default. The MAC and the layout don't add a skew between
  48                  * clock and data.
  49                  * Add 0.3ns for the RXC path and 0.96 + 0.42 ns (1.38 ns) for
  50                  * the TXC path to get the required clock skews.
  51                  */
  52                 /* control data pad skew - devaddr = 0x02, register = 0x04 */
  53                 ksz9031_phy_extended_write(phydev, 0x02,
  54                                            MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW,
  55                                            MII_KSZ9031_MOD_DATA_NO_POST_INC,
  56                                            0x0070);
  57                 /* rx data pad skew - devaddr = 0x02, register = 0x05 */
  58                 ksz9031_phy_extended_write(phydev, 0x02,
  59                                            MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW,
  60                                            MII_KSZ9031_MOD_DATA_NO_POST_INC,
  61                                            0x7777);
  62                 /* tx data pad skew - devaddr = 0x02, register = 0x06 */
  63                 ksz9031_phy_extended_write(phydev, 0x02,
  64                                            MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW,
  65                                            MII_KSZ9031_MOD_DATA_NO_POST_INC,
  66                                            0x0000);
  67                 /* gtx and rx clock pad skew - devaddr = 0x02,register = 0x08 */
  68                 ksz9031_phy_extended_write(phydev, 0x02,
  69                                            MII_KSZ9031_EXT_RGMII_CLOCK_SKEW,
  70                                            MII_KSZ9031_MOD_DATA_NO_POST_INC,
  71                                            0x03f4);
  72                 break;
  73         case PHY_ID_KSZ9131:
  74         default:
  75                 /* read rxc dll control - devaddr = 0x2, register = 0x4c */
  76                 tmp = ksz9031_phy_extended_read(phydev, 0x02,
  77                                         MII_KSZ9131_EXT_RGMII_2NS_SKEW_RXDLL,
  78                                         MII_KSZ9031_MOD_DATA_NO_POST_INC);
  79                 /* disable rxdll bypass (enable 2ns skew delay on RXC) */
  80                 tmp &= ~MII_KSZ9131_RXTXDLL_BYPASS;
  81                 /* rxc data pad skew 2ns - devaddr = 0x02, register = 0x4c */
  82                 tmp = ksz9031_phy_extended_write(phydev, 0x02,
  83                                         MII_KSZ9131_EXT_RGMII_2NS_SKEW_RXDLL,
  84                                         MII_KSZ9031_MOD_DATA_NO_POST_INC, tmp);
  85                 /* read txc dll control - devaddr = 0x02, register = 0x4d */
  86                 tmp = ksz9031_phy_extended_read(phydev, 0x02,
  87                                         MII_KSZ9131_EXT_RGMII_2NS_SKEW_TXDLL,
  88                                         MII_KSZ9031_MOD_DATA_NO_POST_INC);
  89                 /* disable txdll bypass (enable 2ns skew delay on TXC) */
  90                 tmp &= ~MII_KSZ9131_RXTXDLL_BYPASS;
  91                 /* rxc data pad skew 2ns - devaddr = 0x02, register = 0x4d */
  92                 tmp = ksz9031_phy_extended_write(phydev, 0x02,
  93                                         MII_KSZ9131_EXT_RGMII_2NS_SKEW_TXDLL,
  94                                         MII_KSZ9031_MOD_DATA_NO_POST_INC, tmp);
  95                 break;
  96         }
  97
  98         if (phydev->drv->config)
  99                 phydev->drv->config(phydev);
 100         return 0;
 101 }
 102 #endif
 103
 104 int board_init(void)
 105 {
 106         if (IS_ENABLED(CONFIG_FEC_MXC))
 107                 setup_fec();
 108
 109         return 0;
 110 }
 111
 112 int board_mmc_get_env_dev(int devno)
 113 {
 114         return devno;
 115 }
 116
 117 static enum pcb_rev_t get_pcb_revision(void)
 118 {
 119         struct udevice *bus;
 120         struct udevice *i2c_dev = NULL;
 121         int ret;
 122         u8 is_bd71837 = 0;
 123
 124         ret = uclass_get_device_by_seq(UCLASS_I2C, I2C_PMIC, &bus);
 125         if (!ret)
 126                 ret = dm_i2c_probe(bus, 0x4b, 0, &i2c_dev);
 127         if (!ret)
 128                 ret = dm_i2c_read(i2c_dev, 0x0, &is_bd71837, 1);
 129
 130         /* BD71837_REV, High Nibble is major version, fix 1010 */
 131         is_bd71837 = !ret && ((is_bd71837 & 0xf0) == 0xa0);
 132         return is_bd71837 ? PCB_VERSION_1_0 : PCB_VERSION_1_1;
 133 }
 134
 135 static void select_dt_from_module_version(void)
 136 {
 137         char variant[32];
 138         char *env_variant = env_get("variant");
 139         int is_wifi = 0;
 140
 141         if (IS_ENABLED(CONFIG_TDX_CFG_BLOCK)) {
 142                 /*
 143                  * If we have a valid config block and it says we are a
 144                  * module with Wi-Fi/Bluetooth make sure we use the -wifi
 145                  * device tree.
 146                  */
 147                 is_wifi = (tdx_hw_tag.prodid == VERDIN_IMX8MMQ_WIFI_BT_IT) ||
 148                           (tdx_hw_tag.prodid == VERDIN_IMX8MMDL_WIFI_BT_IT);
 149         }
 150
 151         switch (get_pcb_revision()) {
 152         case PCB_VERSION_1_0:
 153                 printf("Detected a V1.0 module\n");
 154                 if (is_wifi)
 155                         strncpy(&variant[0], "wifi", sizeof(variant));
 156                 else
 157                         strncpy(&variant[0], "nonwifi", sizeof(variant));
 158                 break;
 159         default:
 160                 if (is_wifi)
 161                         strncpy(&variant[0], "wifi-v1.1", sizeof(variant));
 162                 else
 163                         strncpy(&variant[0], "nonwifi-v1.1", sizeof(variant));
 164                 break;
 165         }
 166
 167         if (strcmp(variant, env_variant)) {
 168                 printf("Setting variant to %s\n", variant);
 169                 env_set("variant", variant);
 170
 171                 if (IS_ENABLED(CONFIG_ENV_IS_NOWHERE))
 172                         env_save();
 173         }
 174 }
 175
 176 int board_late_init(void)
 177 {
 178         select_dt_from_module_version();
 179
 180         return 0;
 181 }
 182
 183 int board_phys_sdram_size(phys_size_t *size)
 184 {
 185         if (!size)
 186                 return -EINVAL;
 187
 188         *size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
 189
 190         return 0;
 191 }
 192
 193 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
 194 int ft_board_setup(void *blob, struct bd_info *bd)
 195 {
 196         return 0;
 197 }
 198 #endif