board/ti/j721e/evm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Board specific initialization for J721E EVM
   4  *
   5  * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
   6  *      Lokesh Vutla <lokeshvutla@ti.com>
   7  *
   8  */
   9
  10 #include <common.h>
  11 #include <init.h>
  12 #include <asm/arch/sys_proto.h>
  13 #include <asm/arch/hardware.h>
  14 #include <asm/gpio.h>
  15 #include <asm/io.h>
  16 #include <spl.h>
  17 #include <asm/arch/sys_proto.h>
  18
  19 #include "../common/board_detect.h"
  20
  21 #define board_is_j721e_som()    (board_ti_k3_is("J721EX-PM1-SOM") || \
  22                                  board_ti_k3_is("J721EX-PM2-SOM"))
  23
  24 /* Max number of MAC addresses that are parsed/processed per daughter card */
  25 #define DAUGHTER_CARD_NO_OF_MAC_ADDR    8
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 int board_init(void)
  30 {
  31         return 0;
  32 }
  33
  34 int dram_init(void)
  35 {
  36 #ifdef CONFIG_PHYS_64BIT
  37         gd->ram_size = 0x100000000;
  38 #else
  39         gd->ram_size = 0x80000000;
  40 #endif
  41
  42         return 0;
  43 }
  44
  45 ulong board_get_usable_ram_top(ulong total_size)
  46 {
  47 #ifdef CONFIG_PHYS_64BIT
  48         /* Limit RAM used by U-Boot to the DDR low region */
  49         if (gd->ram_top > 0x100000000)
  50                 return 0x100000000;
  51 #endif
  52
  53         return gd->ram_top;
  54 }
  55
  56 int dram_init_banksize(void)
  57 {
  58         /* Bank 0 declares the memory available in the DDR low region */
  59         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
  60         gd->bd->bi_dram[0].size = 0x80000000;
  61         gd->ram_size = 0x80000000;
  62
  63 #ifdef CONFIG_PHYS_64BIT
  64         /* Bank 1 declares the memory available in the DDR high region */
  65         gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
  66         gd->bd->bi_dram[1].size = 0x80000000;
  67         gd->ram_size = 0x100000000;
  68 #endif
  69
  70         return 0;
  71 }
  72
  73 #ifdef CONFIG_SPL_LOAD_FIT
  74 int board_fit_config_name_match(const char *name)
  75 {
  76         if (!strcmp(name, "k3-j721e-common-proc-board"))
  77                 return 0;
  78
  79         return -1;
  80 }
  81 #endif
  82
  83 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
  84 int ft_board_setup(void *blob, bd_t *bd)
  85 {
  86         int ret;
  87
  88         ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
  89         if (ret)
  90                 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
  91
  92         return ret;
  93 }
  94 #endif
  95
  96 int do_board_detect(void)
  97 {
  98         int ret;
  99
 100         ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
 101                                          CONFIG_EEPROM_CHIP_ADDRESS);
 102         if (ret)
 103                 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
 104                        CONFIG_EEPROM_CHIP_ADDRESS, ret);
 105
 106         return ret;
 107 }
 108
 109 static void setup_board_eeprom_env(void)
 110 {
 111         char *name = "j721e";
 112
 113         if (do_board_detect())
 114                 goto invalid_eeprom;
 115
 116         if (board_is_j721e_som())
 117                 name = "j721e";
 118         else
 119                 printf("Unidentified board claims %s in eeprom header\n",
 120                        board_ti_get_name());
 121
 122 invalid_eeprom:
 123         set_board_info_env_am6(name);
 124 }
 125
 126 static void setup_serial(void)
 127 {
 128         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 129         unsigned long board_serial;
 130         char *endp;
 131         char serial_string[17] = { 0 };
 132
 133         if (env_get("serial#"))
 134                 return;
 135
 136         board_serial = simple_strtoul(ep->serial, &endp, 16);
 137         if (*endp != '\0') {
 138                 pr_err("Error: Can't set serial# to %s\n", ep->serial);
 139                 return;
 140         }
 141
 142         snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
 143         env_set("serial#", serial_string);
 144 }
 145
 146 /*
 147  * Declaration of daughtercards to probe. Note that when adding more
 148  * cards they should be grouped by the 'i2c_addr' field to allow for a
 149  * more efficient probing process.
 150  */
 151 static const struct {
 152         u8 i2c_addr;            /* I2C address of card EEPROM */
 153         char *card_name;        /* EEPROM-programmed card name */
 154         char *dtbo_name;        /* Device tree overlay to apply */
 155         u8 eth_offset;          /* ethXaddr MAC address index offset */
 156 } ext_cards[] = {
 157         {
 158                 0x51,
 159                 "J7X-BASE-CPB",
 160                 "",             /* No dtbo for this board */
 161                 0,
 162         },
 163         {
 164                 0x52,
 165                 "J7X-INFOTAN-EXP",
 166                 "",             /* No dtbo for this board */
 167                 0,
 168         },
 169         {
 170                 0x52,
 171                 "J7X-GESI-EXP",
 172                 "",             /* No dtbo for this board */
 173                 5,              /* Start populating from eth5addr */
 174         },
 175         {
 176                 0x54,
 177                 "J7X-VSC8514-ETH",
 178                 "",             /* No dtbo for this board */
 179                 1,              /* Start populating from eth1addr */
 180         },
 181 };
 182
 183 static bool daughter_card_detect_flags[ARRAY_SIZE(ext_cards)];
 184
 185 const char *board_fit_get_additionnal_images(int index, const char *type)
 186 {
 187         int i, j;
 188
 189         if (strcmp(type, FIT_FDT_PROP))
 190                 return NULL;
 191
 192         j = 0;
 193         for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
 194                 if (daughter_card_detect_flags[i]) {
 195                         if (j == index) {
 196                                 /*
 197                                  * Return dtbo name only if populated,
 198                                  * otherwise stop parsing here.
 199                                  */
 200                                 if (strlen(ext_cards[i].dtbo_name))
 201                                         return ext_cards[i].dtbo_name;
 202                                 else
 203                                         return NULL;
 204                         };
 205
 206                         j++;
 207                 }
 208         }
 209
 210         return NULL;
 211 }
 212
 213 static int probe_daughtercards(void)
 214 {
 215         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 216         bool eeprom_read_success;
 217         struct ti_am6_eeprom ep;
 218         u8 previous_i2c_addr;
 219         u8 mac_addr_cnt;
 220         int i;
 221         int ret;
 222
 223         /* Mark previous I2C address variable as not populated */
 224         previous_i2c_addr = 0xff;
 225
 226         /* No EEPROM data was read yet */
 227         eeprom_read_success = false;
 228
 229         /* Iterate through list of daughtercards */
 230         for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
 231                 /* Obtain card-specific I2C address */
 232                 u8 i2c_addr = ext_cards[i].i2c_addr;
 233
 234                 /* Read card EEPROM if not already read previously */
 235                 if (i2c_addr != previous_i2c_addr) {
 236                         /* Store I2C address so we can avoid reading twice */
 237                         previous_i2c_addr = i2c_addr;
 238
 239                         /* Get and parse the daughter card EEPROM record */
 240                         ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS,
 241                                                     i2c_addr,
 242                                                     &ep,
 243                                                     (char **)mac_addr,
 244                                                     DAUGHTER_CARD_NO_OF_MAC_ADDR,
 245                                                     &mac_addr_cnt);
 246                         if (ret) {
 247                                 debug("%s: No daughtercard EEPROM at 0x%02x found %d\n",
 248                                       __func__, i2c_addr, ret);
 249                                 eeprom_read_success = false;
 250                                 /* Skip to the next daughtercard to probe */
 251                                 continue;
 252                         }
 253
 254                         /* EEPROM read successful, okay to further process. */
 255                         eeprom_read_success = true;
 256                 }
 257
 258                 /* Only continue processing if EEPROM data was read */
 259                 if (!eeprom_read_success)
 260                         continue;
 261
 262                 /* Only process the parsed data if we found a match */
 263                 if (strncmp(ep.name, ext_cards[i].card_name, sizeof(ep.name)))
 264                         continue;
 265
 266                 printf("Detected: %s rev %s\n", ep.name, ep.version);
 267                 daughter_card_detect_flags[i] = true;
 268
 269 #ifndef CONFIG_SPL_BUILD
 270                 int j;
 271                 /*
 272                  * Populate any MAC addresses from daughtercard into the U-Boot
 273                  * environment, starting with a card-specific offset so we can
 274                  * have multiple ext_cards contribute to the MAC pool in a well-
 275                  * defined manner.
 276                  */
 277                 for (j = 0; j < mac_addr_cnt; j++) {
 278                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 279                                 continue;
 280
 281                         eth_env_set_enetaddr_by_index("eth",
 282                                                       ext_cards[i].eth_offset + j,
 283                                                       (uchar *)mac_addr[j]);
 284                 }
 285 #endif
 286         }
 287 #ifndef CONFIG_SPL_BUILD
 288         char name_overlays[1024] = { 0 };
 289
 290         for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
 291                 if (!daughter_card_detect_flags[i])
 292                         continue;
 293
 294                 /* Skip if no overlays are to be added */
 295                 if (!strlen(ext_cards[i].dtbo_name))
 296                         continue;
 297
 298                 /*
 299                  * Make sure we are not running out of buffer space by checking
 300                  * if we can fit the new overlay, a trailing space to be used
 301                  * as a separator, plus the terminating zero.
 302                  */
 303                 if (strlen(name_overlays) + strlen(ext_cards[i].dtbo_name) + 2 >
 304                     sizeof(name_overlays))
 305                         return -ENOMEM;
 306
 307                 /* Append to our list of overlays */
 308                 strcat(name_overlays, ext_cards[i].dtbo_name);
 309                 strcat(name_overlays, " ");
 310         }
 311
 312         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 313         if (strlen(name_overlays))
 314                 return env_set("name_overlays", name_overlays);
 315 #endif
 316
 317         return 0;
 318 }
 319
 320 int board_late_init(void)
 321 {
 322         setup_board_eeprom_env();
 323         setup_serial();
 324
 325         /* Check for and probe any plugged-in daughtercards */
 326         probe_daughtercards();
 327
 328         return 0;
 329 }
 330
 331 void spl_board_init(void)
 332 {
 333         probe_daughtercards();
 334 }