board/ti/am65x/evm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Board specific initialization for AM654 EVM
   4  *
   5  * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
   6  *      Lokesh Vutla <lokeshvutla@ti.com>
   7  *
   8  */
   9
  10 #include <common.h>
  11 #include <dm.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 <asm/omap_common.h>
  17 #include <env.h>
  18 #include <spl.h>
  19 #include <asm/arch/sys_proto.h>
  20
  21 #include "../common/board_detect.h"
  22
  23 #define board_is_am65x_base_board()     board_ti_is("AM6-COMPROCEVM")
  24
  25 /* Daughter card presence detection signals */
  26 enum {
  27         AM65X_EVM_APP_BRD_DET,
  28         AM65X_EVM_LCD_BRD_DET,
  29         AM65X_EVM_SERDES_BRD_DET,
  30         AM65X_EVM_HDMI_GPMC_BRD_DET,
  31         AM65X_EVM_BRD_DET_COUNT,
  32 };
  33
  34 /* Max number of MAC addresses that are parsed/processed per daughter card */
  35 #define DAUGHTER_CARD_NO_OF_MAC_ADDR    8
  36
  37 DECLARE_GLOBAL_DATA_PTR;
  38
  39 int board_init(void)
  40 {
  41         return 0;
  42 }
  43
  44 int dram_init(void)
  45 {
  46 #ifdef CONFIG_PHYS_64BIT
  47         gd->ram_size = 0x100000000;
  48 #else
  49         gd->ram_size = 0x80000000;
  50 #endif
  51
  52         return 0;
  53 }
  54
  55 ulong board_get_usable_ram_top(ulong total_size)
  56 {
  57 #ifdef CONFIG_PHYS_64BIT
  58         /* Limit RAM used by U-Boot to the DDR low region */
  59         if (gd->ram_top > 0x100000000)
  60                 return 0x100000000;
  61 #endif
  62
  63         return gd->ram_top;
  64 }
  65
  66 int dram_init_banksize(void)
  67 {
  68         /* Bank 0 declares the memory available in the DDR low region */
  69         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
  70         gd->bd->bi_dram[0].size = 0x80000000;
  71
  72 #ifdef CONFIG_PHYS_64BIT
  73         /* Bank 1 declares the memory available in the DDR high region */
  74         gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
  75         gd->bd->bi_dram[1].size = 0x80000000;
  76 #endif
  77
  78         return 0;
  79 }
  80
  81 #ifdef CONFIG_SPL_LOAD_FIT
  82 int board_fit_config_name_match(const char *name)
  83 {
  84 #ifdef CONFIG_TARGET_AM654_A53_EVM
  85         if (!strcmp(name, "k3-am654-base-board"))
  86                 return 0;
  87 #endif
  88
  89         return -1;
  90 }
  91 #endif
  92
  93 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
  94 int ft_board_setup(void *blob, bd_t *bd)
  95 {
  96         int ret;
  97
  98         ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
  99         if (ret) {
 100                 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
 101                 return ret;
 102         }
 103
 104 #if defined(CONFIG_TI_SECURE_DEVICE)
 105         /* Make HW RNG reserved for secure world use */
 106         ret = fdt_disable_node(blob, "/interconnect@100000/trng@4e10000");
 107         if (ret) {
 108                 printf("%s: disabling TRGN failed %d\n", __func__, ret);
 109                 return ret;
 110         }
 111 #endif
 112
 113         return 0;
 114 }
 115 #endif
 116
 117 int do_board_detect(void)
 118 {
 119         int ret;
 120
 121         ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
 122                                          CONFIG_EEPROM_CHIP_ADDRESS);
 123         if (ret)
 124                 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
 125                        CONFIG_EEPROM_CHIP_ADDRESS, ret);
 126
 127         return ret;
 128 }
 129
 130 int checkboard(void)
 131 {
 132         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 133
 134         if (do_board_detect())
 135                 /* EEPROM not populated */
 136                 printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
 137         else
 138                 printf("Board: %s rev %s\n", ep->name, ep->version);
 139
 140         return 0;
 141 }
 142
 143 static void setup_board_eeprom_env(void)
 144 {
 145         char *name = "am65x";
 146
 147         if (do_board_detect())
 148                 goto invalid_eeprom;
 149
 150         if (board_is_am65x_base_board())
 151                 name = "am65x";
 152         else
 153                 printf("Unidentified board claims %s in eeprom header\n",
 154                        board_ti_get_name());
 155
 156 invalid_eeprom:
 157         set_board_info_env_am6(name);
 158 }
 159
 160 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
 161 {
 162         int ret;
 163
 164         memset(desc, 0, sizeof(*desc));
 165
 166         ret = dm_gpio_lookup_name(gpio_name, desc);
 167         if (ret < 0)
 168                 return ret;
 169
 170         /* Request GPIO, simply re-using the name as label */
 171         ret = dm_gpio_request(desc, gpio_name);
 172         if (ret < 0)
 173                 return ret;
 174
 175         return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
 176 }
 177
 178 static int probe_daughtercards(void)
 179 {
 180         struct ti_am6_eeprom ep;
 181         struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
 182         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 183         u8 mac_addr_cnt;
 184         char name_overlays[1024] = { 0 };
 185         int i, j;
 186         int ret;
 187
 188         /*
 189          * Daughter card presence detection signal name to GPIO (via I2C I/O
 190          * expander @ address 0x38) name and EEPROM I2C address mapping.
 191          */
 192         const struct {
 193                 char *gpio_name;
 194                 u8 i2c_addr;
 195         } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
 196                 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
 197                 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
 198                 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
 199                 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
 200         };
 201
 202         /* Declaration of daughtercards to probe */
 203         const struct {
 204                 u8 slot_index;          /* Slot the card is installed */
 205                 char *card_name;        /* EEPROM-programmed card name */
 206                 char *dtbo_name;        /* Device tree overlay to apply */
 207                 u8 eth_offset;          /* ethXaddr MAC address index offset */
 208         } cards[] = {
 209                 {
 210                         AM65X_EVM_APP_BRD_DET,
 211                         "AM6-GPAPPEVM",
 212                         "k3-am654-gp.dtbo",
 213                         0,
 214                 },
 215                 {
 216                         AM65X_EVM_APP_BRD_DET,
 217                         "AM6-IDKAPPEVM",
 218                         "k3-am654-idk.dtbo",
 219                         3,
 220                 },
 221                 {
 222                         AM65X_EVM_SERDES_BRD_DET,
 223                         "SER-PCIE2LEVM",
 224                         "k3-am654-pcie-usb2.dtbo",
 225                         0,
 226                 },
 227                 {
 228                         AM65X_EVM_SERDES_BRD_DET,
 229                         "SER-PCIEUSBEVM",
 230                         "k3-am654-pcie-usb3.dtbo",
 231                         0,
 232                 },
 233                 {
 234                         AM65X_EVM_LCD_BRD_DET,
 235                         "OLDI-LCD1EVM",
 236                         "k3-am654-evm-oldi-lcd1evm.dtbo",
 237                         0,
 238                 },
 239         };
 240
 241         /*
 242          * Initialize GPIO used for daughtercard slot presence detection and
 243          * keep the resulting handles in local array for easier access.
 244          */
 245         for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
 246                 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
 247                                                  &board_det_gpios[i]);
 248                 if (ret < 0)
 249                         return ret;
 250         }
 251
 252         for (i = 0; i < ARRAY_SIZE(cards); i++) {
 253                 /* Obtain card-specific slot index and associated I2C address */
 254                 u8 slot_index = cards[i].slot_index;
 255                 u8 i2c_addr = slot_map[slot_index].i2c_addr;
 256
 257                 /*
 258                  * The presence detection signal is active-low, hence skip
 259                  * over this card slot if anything other than 0 is returned.
 260                  */
 261                 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
 262                 if (ret < 0)
 263                         return ret;
 264                 else if (ret)
 265                         continue;
 266
 267                 /* Get and parse the daughter card EEPROM record */
 268                 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
 269                                             &ep,
 270                                             (char **)mac_addr,
 271                                             DAUGHTER_CARD_NO_OF_MAC_ADDR,
 272                                             &mac_addr_cnt);
 273                 if (ret) {
 274                         pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
 275                                i2c_addr, ret);
 276                         /*
 277                          * Even this is pretty serious let's just skip over
 278                          * this particular daughtercard, rather than ending
 279                          * the probing process altogether.
 280                          */
 281                         continue;
 282                 }
 283
 284                 /* Only process the parsed data if we found a match */
 285                 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
 286                         continue;
 287
 288                 printf("Detected: %s rev %s\n", ep.name, ep.version);
 289
 290                 /*
 291                  * Populate any MAC addresses from daughtercard into the U-Boot
 292                  * environment, starting with a card-specific offset so we can
 293                  * have multiple cards contribute to the MAC pool in a well-
 294                  * defined manner.
 295                  */
 296                 for (j = 0; j < mac_addr_cnt; j++) {
 297                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 298                                 continue;
 299
 300                         eth_env_set_enetaddr_by_index("eth",
 301                                                       cards[i].eth_offset + j,
 302                                                       (uchar *)mac_addr[j]);
 303                 }
 304
 305                 /* Skip if no overlays are to be added */
 306                 if (!strlen(cards[i].dtbo_name))
 307                         continue;
 308
 309                 /*
 310                  * Make sure we are not running out of buffer space by checking
 311                  * if we can fit the new overlay, a trailing space to be used
 312                  * as a separator, plus the terminating zero.
 313                  */
 314                 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
 315                     sizeof(name_overlays))
 316                         return -ENOMEM;
 317
 318                 /* Append to our list of overlays */
 319                 strcat(name_overlays, cards[i].dtbo_name);
 320                 strcat(name_overlays, " ");
 321         }
 322
 323         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 324         if (strlen(name_overlays))
 325                 return env_set("name_overlays", name_overlays);
 326
 327         return 0;
 328 }
 329
 330 int board_late_init(void)
 331 {
 332         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 333
 334         setup_board_eeprom_env();
 335
 336         /*
 337          * The first MAC address for ethernet a.k.a. ethernet0 comes from
 338          * efuse populated via the am654 gigabit eth switch subsystem driver.
 339          * All the other ones are populated via EEPROM, hence continue with
 340          * an index of 1.
 341          */
 342         board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
 343
 344         /* Check for and probe any plugged-in daughtercards */
 345         probe_daughtercards();
 346
 347         return 0;
 348 }