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 <fdt_support.h>
  13 #include <image.h>
  14 #include <init.h>
  15 #include <net.h>
  16 #include <asm/arch/sys_proto.h>
  17 #include <asm/arch/hardware.h>
  18 #include <asm/gpio.h>
  19 #include <asm/io.h>
  20 #include <asm/omap_common.h>
  21 #include <env.h>
  22 #include <spl.h>
  23 #include <asm/arch/sys_proto.h>
  24
  25 #include "../common/board_detect.h"
  26
  27 #define board_is_am65x_base_board()     board_ti_is("AM6-COMPROCEVM")
  28
  29 /* Daughter card presence detection signals */
  30 enum {
  31         AM65X_EVM_APP_BRD_DET,
  32         AM65X_EVM_LCD_BRD_DET,
  33         AM65X_EVM_SERDES_BRD_DET,
  34         AM65X_EVM_HDMI_GPMC_BRD_DET,
  35         AM65X_EVM_BRD_DET_COUNT,
  36 };
  37
  38 /* Max number of MAC addresses that are parsed/processed per daughter card */
  39 #define DAUGHTER_CARD_NO_OF_MAC_ADDR    8
  40
  41 DECLARE_GLOBAL_DATA_PTR;
  42
  43 int board_init(void)
  44 {
  45         return 0;
  46 }
  47
  48 int dram_init(void)
  49 {
  50 #ifdef CONFIG_PHYS_64BIT
  51         gd->ram_size = 0x100000000;
  52 #else
  53         gd->ram_size = 0x80000000;
  54 #endif
  55
  56         return 0;
  57 }
  58
  59 ulong board_get_usable_ram_top(ulong total_size)
  60 {
  61 #ifdef CONFIG_PHYS_64BIT
  62         /* Limit RAM used by U-Boot to the DDR low region */
  63         if (gd->ram_top > 0x100000000)
  64                 return 0x100000000;
  65 #endif
  66
  67         return gd->ram_top;
  68 }
  69
  70 int dram_init_banksize(void)
  71 {
  72         /* Bank 0 declares the memory available in the DDR low region */
  73         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
  74         gd->bd->bi_dram[0].size = 0x80000000;
  75         gd->ram_size = 0x80000000;
  76
  77 #ifdef CONFIG_PHYS_64BIT
  78         /* Bank 1 declares the memory available in the DDR high region */
  79         gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
  80         gd->bd->bi_dram[1].size = 0x80000000;
  81         gd->ram_size = 0x100000000;
  82 #endif
  83
  84         return 0;
  85 }
  86
  87 #ifdef CONFIG_SPL_LOAD_FIT
  88 int board_fit_config_name_match(const char *name)
  89 {
  90 #ifdef CONFIG_TARGET_AM654_A53_EVM
  91         if (!strcmp(name, "k3-am654-base-board"))
  92                 return 0;
  93 #endif
  94
  95         return -1;
  96 }
  97 #endif
  98
  99 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
 100 int ft_board_setup(void *blob, bd_t *bd)
 101 {
 102         int ret;
 103
 104         ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
 105         if (ret) {
 106                 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
 107                 return ret;
 108         }
 109
 110 #if defined(CONFIG_TI_SECURE_DEVICE)
 111         /* Make HW RNG reserved for secure world use */
 112         ret = fdt_disable_node(blob, "/interconnect@100000/trng@4e10000");
 113         if (ret)
 114                 printf("%s: disabling TRGN failed %d\n", __func__, ret);
 115 #endif
 116
 117         return 0;
 118 }
 119 #endif
 120
 121 int do_board_detect(void)
 122 {
 123         int ret;
 124
 125         ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
 126                                          CONFIG_EEPROM_CHIP_ADDRESS);
 127         if (ret)
 128                 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
 129                        CONFIG_EEPROM_CHIP_ADDRESS, ret);
 130
 131         return ret;
 132 }
 133
 134 int checkboard(void)
 135 {
 136         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 137
 138         if (do_board_detect())
 139                 /* EEPROM not populated */
 140                 printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
 141         else
 142                 printf("Board: %s rev %s\n", ep->name, ep->version);
 143
 144         return 0;
 145 }
 146
 147 static void setup_board_eeprom_env(void)
 148 {
 149         char *name = "am65x";
 150
 151         if (do_board_detect())
 152                 goto invalid_eeprom;
 153
 154         if (board_is_am65x_base_board())
 155                 name = "am65x";
 156         else
 157                 printf("Unidentified board claims %s in eeprom header\n",
 158                        board_ti_get_name());
 159
 160 invalid_eeprom:
 161         set_board_info_env_am6(name);
 162 }
 163
 164 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
 165 {
 166         int ret;
 167
 168         memset(desc, 0, sizeof(*desc));
 169
 170         ret = dm_gpio_lookup_name(gpio_name, desc);
 171         if (ret < 0)
 172                 return ret;
 173
 174         /* Request GPIO, simply re-using the name as label */
 175         ret = dm_gpio_request(desc, gpio_name);
 176         if (ret < 0)
 177                 return ret;
 178
 179         return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
 180 }
 181
 182 static int probe_daughtercards(void)
 183 {
 184         struct ti_am6_eeprom ep;
 185         struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
 186         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 187         u8 mac_addr_cnt;
 188         char name_overlays[1024] = { 0 };
 189         int i, j;
 190         int ret;
 191
 192         /*
 193          * Daughter card presence detection signal name to GPIO (via I2C I/O
 194          * expander @ address 0x38) name and EEPROM I2C address mapping.
 195          */
 196         const struct {
 197                 char *gpio_name;
 198                 u8 i2c_addr;
 199         } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
 200                 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
 201                 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
 202                 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
 203                 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
 204         };
 205
 206         /* Declaration of daughtercards to probe */
 207         const struct {
 208                 u8 slot_index;          /* Slot the card is installed */
 209                 char *card_name;        /* EEPROM-programmed card name */
 210                 char *dtbo_name;        /* Device tree overlay to apply */
 211                 u8 eth_offset;          /* ethXaddr MAC address index offset */
 212         } cards[] = {
 213                 {
 214                         AM65X_EVM_APP_BRD_DET,
 215                         "AM6-GPAPPEVM",
 216                         "k3-am654-gp.dtbo",
 217                         0,
 218                 },
 219                 {
 220                         AM65X_EVM_APP_BRD_DET,
 221                         "AM6-IDKAPPEVM",
 222                         "k3-am654-idk.dtbo",
 223                         3,
 224                 },
 225                 {
 226                         AM65X_EVM_SERDES_BRD_DET,
 227                         "SER-PCIE2LEVM",
 228                         "k3-am654-pcie-usb2.dtbo",
 229                         0,
 230                 },
 231                 {
 232                         AM65X_EVM_SERDES_BRD_DET,
 233                         "SER-PCIEUSBEVM",
 234                         "k3-am654-pcie-usb3.dtbo",
 235                         0,
 236                 },
 237                 {
 238                         AM65X_EVM_LCD_BRD_DET,
 239                         "OLDI-LCD1EVM",
 240                         "k3-am654-evm-oldi-lcd1evm.dtbo",
 241                         0,
 242                 },
 243         };
 244
 245         /*
 246          * Initialize GPIO used for daughtercard slot presence detection and
 247          * keep the resulting handles in local array for easier access.
 248          */
 249         for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
 250                 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
 251                                                  &board_det_gpios[i]);
 252                 if (ret < 0)
 253                         return ret;
 254         }
 255
 256         for (i = 0; i < ARRAY_SIZE(cards); i++) {
 257                 /* Obtain card-specific slot index and associated I2C address */
 258                 u8 slot_index = cards[i].slot_index;
 259                 u8 i2c_addr = slot_map[slot_index].i2c_addr;
 260
 261                 /*
 262                  * The presence detection signal is active-low, hence skip
 263                  * over this card slot if anything other than 0 is returned.
 264                  */
 265                 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
 266                 if (ret < 0)
 267                         return ret;
 268                 else if (ret)
 269                         continue;
 270
 271                 /* Get and parse the daughter card EEPROM record */
 272                 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
 273                                             &ep,
 274                                             (char **)mac_addr,
 275                                             DAUGHTER_CARD_NO_OF_MAC_ADDR,
 276                                             &mac_addr_cnt);
 277                 if (ret) {
 278                         pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
 279                                i2c_addr, ret);
 280                         /*
 281                          * Even this is pretty serious let's just skip over
 282                          * this particular daughtercard, rather than ending
 283                          * the probing process altogether.
 284                          */
 285                         continue;
 286                 }
 287
 288                 /* Only process the parsed data if we found a match */
 289                 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
 290                         continue;
 291
 292                 printf("Detected: %s rev %s\n", ep.name, ep.version);
 293
 294                 /*
 295                  * Populate any MAC addresses from daughtercard into the U-Boot
 296                  * environment, starting with a card-specific offset so we can
 297                  * have multiple cards contribute to the MAC pool in a well-
 298                  * defined manner.
 299                  */
 300                 for (j = 0; j < mac_addr_cnt; j++) {
 301                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 302                                 continue;
 303
 304                         eth_env_set_enetaddr_by_index("eth",
 305                                                       cards[i].eth_offset + j,
 306                                                       (uchar *)mac_addr[j]);
 307                 }
 308
 309                 /* Skip if no overlays are to be added */
 310                 if (!strlen(cards[i].dtbo_name))
 311                         continue;
 312
 313                 /*
 314                  * Make sure we are not running out of buffer space by checking
 315                  * if we can fit the new overlay, a trailing space to be used
 316                  * as a separator, plus the terminating zero.
 317                  */
 318                 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
 319                     sizeof(name_overlays))
 320                         return -ENOMEM;
 321
 322                 /* Append to our list of overlays */
 323                 strcat(name_overlays, cards[i].dtbo_name);
 324                 strcat(name_overlays, " ");
 325         }
 326
 327         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 328         if (strlen(name_overlays))
 329                 return env_set("name_overlays", name_overlays);
 330
 331         return 0;
 332 }
 333
 334 int board_late_init(void)
 335 {
 336         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 337
 338         setup_board_eeprom_env();
 339
 340         /*
 341          * The first MAC address for ethernet a.k.a. ethernet0 comes from
 342          * efuse populated via the am654 gigabit eth switch subsystem driver.
 343          * All the other ones are populated via EEPROM, hence continue with
 344          * an index of 1.
 345          */
 346         board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
 347
 348         /* Check for and probe any plugged-in daughtercards */
 349         probe_daughtercards();
 350
 351         return 0;
 352 }