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 int checkboard(void)
 110 {
 111         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 112
 113         if (do_board_detect())
 114                 /* EEPROM not populated */
 115                 printf("Board: %s rev %s\n", "J721EX-PM1-SOM", "E2");
 116         else
 117                 printf("Board: %s rev %s\n", ep->name, ep->version);
 118
 119         return 0;
 120 }
 121
 122 static void setup_board_eeprom_env(void)
 123 {
 124         char *name = "j721e";
 125
 126         if (do_board_detect())
 127                 goto invalid_eeprom;
 128
 129         if (board_is_j721e_som())
 130                 name = "j721e";
 131         else
 132                 printf("Unidentified board claims %s in eeprom header\n",
 133                        board_ti_get_name());
 134
 135 invalid_eeprom:
 136         set_board_info_env_am6(name);
 137 }
 138
 139 static void setup_serial(void)
 140 {
 141         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 142         unsigned long board_serial;
 143         char *endp;
 144         char serial_string[17] = { 0 };
 145
 146         if (env_get("serial#"))
 147                 return;
 148
 149         board_serial = simple_strtoul(ep->serial, &endp, 16);
 150         if (*endp != '\0') {
 151                 pr_err("Error: Can't set serial# to %s\n", ep->serial);
 152                 return;
 153         }
 154
 155         snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
 156         env_set("serial#", serial_string);
 157 }
 158
 159 /*
 160  * Declaration of daughtercards to probe. Note that when adding more
 161  * cards they should be grouped by the 'i2c_addr' field to allow for a
 162  * more efficient probing process.
 163  */
 164 static const struct {
 165         u8 i2c_addr;            /* I2C address of card EEPROM */
 166         char *card_name;        /* EEPROM-programmed card name */
 167         char *dtbo_name;        /* Device tree overlay to apply */
 168         u8 eth_offset;          /* ethXaddr MAC address index offset */
 169 } ext_cards[] = {
 170         {
 171                 0x51,
 172                 "J7X-BASE-CPB",
 173                 "",             /* No dtbo for this board */
 174                 0,
 175         },
 176         {
 177                 0x52,
 178                 "J7X-INFOTAN-EXP",
 179                 "",             /* No dtbo for this board */
 180                 0,
 181         },
 182         {
 183                 0x52,
 184                 "J7X-GESI-EXP",
 185                 "",             /* No dtbo for this board */
 186                 5,              /* Start populating from eth5addr */
 187         },
 188         {
 189                 0x54,
 190                 "J7X-VSC8514-ETH",
 191                 "",             /* No dtbo for this board */
 192                 1,              /* Start populating from eth1addr */
 193         },
 194 };
 195
 196 static bool daughter_card_detect_flags[ARRAY_SIZE(ext_cards)];
 197
 198 const char *board_fit_get_additionnal_images(int index, const char *type)
 199 {
 200         int i, j;
 201
 202         if (strcmp(type, FIT_FDT_PROP))
 203                 return NULL;
 204
 205         j = 0;
 206         for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
 207                 if (daughter_card_detect_flags[i]) {
 208                         if (j == index) {
 209                                 /*
 210                                  * Return dtbo name only if populated,
 211                                  * otherwise stop parsing here.
 212                                  */
 213                                 if (strlen(ext_cards[i].dtbo_name))
 214                                         return ext_cards[i].dtbo_name;
 215                                 else
 216                                         return NULL;
 217                         };
 218
 219                         j++;
 220                 }
 221         }
 222
 223         return NULL;
 224 }
 225
 226 static int probe_daughtercards(void)
 227 {
 228         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 229         bool eeprom_read_success;
 230         struct ti_am6_eeprom ep;
 231         u8 previous_i2c_addr;
 232         u8 mac_addr_cnt;
 233         int i;
 234         int ret;
 235
 236         /* Mark previous I2C address variable as not populated */
 237         previous_i2c_addr = 0xff;
 238
 239         /* No EEPROM data was read yet */
 240         eeprom_read_success = false;
 241
 242         /* Iterate through list of daughtercards */
 243         for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
 244                 /* Obtain card-specific I2C address */
 245                 u8 i2c_addr = ext_cards[i].i2c_addr;
 246
 247                 /* Read card EEPROM if not already read previously */
 248                 if (i2c_addr != previous_i2c_addr) {
 249                         /* Store I2C address so we can avoid reading twice */
 250                         previous_i2c_addr = i2c_addr;
 251
 252                         /* Get and parse the daughter card EEPROM record */
 253                         ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS,
 254                                                     i2c_addr,
 255                                                     &ep,
 256                                                     (char **)mac_addr,
 257                                                     DAUGHTER_CARD_NO_OF_MAC_ADDR,
 258                                                     &mac_addr_cnt);
 259                         if (ret) {
 260                                 debug("%s: No daughtercard EEPROM at 0x%02x found %d\n",
 261                                       __func__, i2c_addr, ret);
 262                                 eeprom_read_success = false;
 263                                 /* Skip to the next daughtercard to probe */
 264                                 continue;
 265                         }
 266
 267                         /* EEPROM read successful, okay to further process. */
 268                         eeprom_read_success = true;
 269                 }
 270
 271                 /* Only continue processing if EEPROM data was read */
 272                 if (!eeprom_read_success)
 273                         continue;
 274
 275                 /* Only process the parsed data if we found a match */
 276                 if (strncmp(ep.name, ext_cards[i].card_name, sizeof(ep.name)))
 277                         continue;
 278
 279                 printf("Detected: %s rev %s\n", ep.name, ep.version);
 280                 daughter_card_detect_flags[i] = true;
 281
 282 #ifndef CONFIG_SPL_BUILD
 283                 int j;
 284                 /*
 285                  * Populate any MAC addresses from daughtercard into the U-Boot
 286                  * environment, starting with a card-specific offset so we can
 287                  * have multiple ext_cards contribute to the MAC pool in a well-
 288                  * defined manner.
 289                  */
 290                 for (j = 0; j < mac_addr_cnt; j++) {
 291                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 292                                 continue;
 293
 294                         eth_env_set_enetaddr_by_index("eth",
 295                                                       ext_cards[i].eth_offset + j,
 296                                                       (uchar *)mac_addr[j]);
 297                 }
 298 #endif
 299         }
 300 #ifndef CONFIG_SPL_BUILD
 301         char name_overlays[1024] = { 0 };
 302
 303         for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
 304                 if (!daughter_card_detect_flags[i])
 305                         continue;
 306
 307                 /* Skip if no overlays are to be added */
 308                 if (!strlen(ext_cards[i].dtbo_name))
 309                         continue;
 310
 311                 /*
 312                  * Make sure we are not running out of buffer space by checking
 313                  * if we can fit the new overlay, a trailing space to be used
 314                  * as a separator, plus the terminating zero.
 315                  */
 316                 if (strlen(name_overlays) + strlen(ext_cards[i].dtbo_name) + 2 >
 317                     sizeof(name_overlays))
 318                         return -ENOMEM;
 319
 320                 /* Append to our list of overlays */
 321                 strcat(name_overlays, ext_cards[i].dtbo_name);
 322                 strcat(name_overlays, " ");
 323         }
 324
 325         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 326         if (strlen(name_overlays))
 327                 return env_set("name_overlays", name_overlays);
 328 #endif
 329
 330         return 0;
 331 }
 332
 333 int board_late_init(void)
 334 {
 335         setup_board_eeprom_env();
 336         setup_serial();
 337
 338         /* Check for and probe any plugged-in daughtercards */
 339         probe_daughtercards();
 340
 341         return 0;
 342 }
 343
 344 void spl_board_init(void)
 345 {
 346         probe_daughtercards();
 347 }