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