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