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 static void setup_board_eeprom_env(void)
 131 {
 132         char *name = "am65x";
 133
 134         if (do_board_detect())
 135                 goto invalid_eeprom;
 136
 137         if (board_is_am65x_base_board())
 138                 name = "am65x";
 139         else
 140                 printf("Unidentified board claims %s in eeprom header\n",
 141                        board_ti_get_name());
 142
 143 invalid_eeprom:
 144         set_board_info_env_am6(name);
 145 }
 146
 147 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
 148 {
 149         int ret;
 150
 151         memset(desc, 0, sizeof(*desc));
 152
 153         ret = dm_gpio_lookup_name(gpio_name, desc);
 154         if (ret < 0)
 155                 return ret;
 156
 157         /* Request GPIO, simply re-using the name as label */
 158         ret = dm_gpio_request(desc, gpio_name);
 159         if (ret < 0)
 160                 return ret;
 161
 162         return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
 163 }
 164
 165 static int probe_daughtercards(void)
 166 {
 167         struct ti_am6_eeprom ep;
 168         struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
 169         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 170         u8 mac_addr_cnt;
 171         char name_overlays[1024] = { 0 };
 172         int i, j;
 173         int ret;
 174
 175         /*
 176          * Daughter card presence detection signal name to GPIO (via I2C I/O
 177          * expander @ address 0x38) name and EEPROM I2C address mapping.
 178          */
 179         const struct {
 180                 char *gpio_name;
 181                 u8 i2c_addr;
 182         } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
 183                 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
 184                 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
 185                 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
 186                 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
 187         };
 188
 189         /* Declaration of daughtercards to probe */
 190         const struct {
 191                 u8 slot_index;          /* Slot the card is installed */
 192                 char *card_name;        /* EEPROM-programmed card name */
 193                 char *dtbo_name;        /* Device tree overlay to apply */
 194                 u8 eth_offset;          /* ethXaddr MAC address index offset */
 195         } cards[] = {
 196                 {
 197                         AM65X_EVM_APP_BRD_DET,
 198                         "AM6-GPAPPEVM",
 199                         "k3-am654-gp.dtbo",
 200                         0,
 201                 },
 202                 {
 203                         AM65X_EVM_APP_BRD_DET,
 204                         "AM6-IDKAPPEVM",
 205                         "k3-am654-idk.dtbo",
 206                         3,
 207                 },
 208                 {
 209                         AM65X_EVM_SERDES_BRD_DET,
 210                         "SER-PCIE2LEVM",
 211                         "k3-am654-pcie-usb2.dtbo",
 212                         0,
 213                 },
 214                 {
 215                         AM65X_EVM_SERDES_BRD_DET,
 216                         "SER-PCIEUSBEVM",
 217                         "k3-am654-pcie-usb3.dtbo",
 218                         0,
 219                 },
 220                 {
 221                         AM65X_EVM_LCD_BRD_DET,
 222                         "OLDI-LCD1EVM",
 223                         "k3-am654-evm-oldi-lcd1evm.dtbo",
 224                         0,
 225                 },
 226         };
 227
 228         /*
 229          * Initialize GPIO used for daughtercard slot presence detection and
 230          * keep the resulting handles in local array for easier access.
 231          */
 232         for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
 233                 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
 234                                                  &board_det_gpios[i]);
 235                 if (ret < 0)
 236                         return ret;
 237         }
 238
 239         for (i = 0; i < ARRAY_SIZE(cards); i++) {
 240                 /* Obtain card-specific slot index and associated I2C address */
 241                 u8 slot_index = cards[i].slot_index;
 242                 u8 i2c_addr = slot_map[slot_index].i2c_addr;
 243
 244                 /*
 245                  * The presence detection signal is active-low, hence skip
 246                  * over this card slot if anything other than 0 is returned.
 247                  */
 248                 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
 249                 if (ret < 0)
 250                         return ret;
 251                 else if (ret)
 252                         continue;
 253
 254                 /* Get and parse the daughter card EEPROM record */
 255                 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
 256                                             &ep,
 257                                             (char **)mac_addr,
 258                                             DAUGHTER_CARD_NO_OF_MAC_ADDR,
 259                                             &mac_addr_cnt);
 260                 if (ret) {
 261                         pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
 262                                i2c_addr, ret);
 263                         /*
 264                          * Even this is pretty serious let's just skip over
 265                          * this particular daughtercard, rather than ending
 266                          * the probing process altogether.
 267                          */
 268                         continue;
 269                 }
 270
 271                 /* Only process the parsed data if we found a match */
 272                 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
 273                         continue;
 274
 275                 printf("detected %s\n", cards[i].card_name);
 276
 277                 /*
 278                  * Populate any MAC addresses from daughtercard into the U-Boot
 279                  * environment, starting with a card-specific offset so we can
 280                  * have multiple cards contribute to the MAC pool in a well-
 281                  * defined manner.
 282                  */
 283                 for (j = 0; j < mac_addr_cnt; j++) {
 284                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 285                                 continue;
 286
 287                         eth_env_set_enetaddr_by_index("eth",
 288                                                       cards[i].eth_offset + j,
 289                                                       (uchar *)mac_addr[j]);
 290                 }
 291
 292                 /* Skip if no overlays are to be added */
 293                 if (!strlen(cards[i].dtbo_name))
 294                         continue;
 295
 296                 /*
 297                  * Make sure we are not running out of buffer space by checking
 298                  * if we can fit the new overlay, a trailing space to be used
 299                  * as a separator, plus the terminating zero.
 300                  */
 301                 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
 302                     sizeof(name_overlays))
 303                         return -ENOMEM;
 304
 305                 /* Append to our list of overlays */
 306                 strcat(name_overlays, cards[i].dtbo_name);
 307                 strcat(name_overlays, " ");
 308         }
 309
 310         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 311         if (strlen(name_overlays))
 312                 return env_set("name_overlays", name_overlays);
 313
 314         return 0;
 315 }
 316
 317 int board_late_init(void)
 318 {
 319         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 320
 321         setup_board_eeprom_env();
 322
 323         /*
 324          * The first MAC address for ethernet a.k.a. ethernet0 comes from
 325          * efuse populated via the am654 gigabit eth switch subsystem driver.
 326          * All the other ones are populated via EEPROM, hence continue with
 327          * an index of 1.
 328          */
 329         board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
 330
 331         /* Check for and probe any plugged-in daughtercards */
 332         probe_daughtercards();
 333
 334         return 0;
 335 }