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 <[email protected]>
   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
 102         return ret;
 103 }
 104 #endif
 105
 106 int do_board_detect(void)
 107 {
 108         int ret;
 109
 110         ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
 111                                          CONFIG_EEPROM_CHIP_ADDRESS);
 112         if (ret)
 113                 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
 114                        CONFIG_EEPROM_CHIP_ADDRESS, ret);
 115
 116         return ret;
 117 }
 118
 119 static void setup_board_eeprom_env(void)
 120 {
 121         char *name = "am65x";
 122
 123         if (do_board_detect())
 124                 goto invalid_eeprom;
 125
 126         if (board_is_am65x_base_board())
 127                 name = "am65x";
 128         else
 129                 printf("Unidentified board claims %s in eeprom header\n",
 130                        board_ti_get_name());
 131
 132 invalid_eeprom:
 133         set_board_info_env_am6(name);
 134 }
 135
 136 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
 137 {
 138         int ret;
 139
 140         memset(desc, 0, sizeof(*desc));
 141
 142         ret = dm_gpio_lookup_name(gpio_name, desc);
 143         if (ret < 0)
 144                 return ret;
 145
 146         /* Request GPIO, simply re-using the name as label */
 147         ret = dm_gpio_request(desc, gpio_name);
 148         if (ret < 0)
 149                 return ret;
 150
 151         return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
 152 }
 153
 154 static int probe_daughtercards(void)
 155 {
 156         struct ti_am6_eeprom ep;
 157         struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
 158         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 159         u8 mac_addr_cnt;
 160         char name_overlays[1024] = { 0 };
 161         int i, j;
 162         int ret;
 163
 164         /*
 165          * Daughter card presence detection signal name to GPIO (via I2C I/O
 166          * expander @ address 0x38) name and EEPROM I2C address mapping.
 167          */
 168         const struct {
 169                 char *gpio_name;
 170                 u8 i2c_addr;
 171         } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
 172                 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
 173                 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
 174                 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
 175                 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
 176         };
 177
 178         /* Declaration of daughtercards to probe */
 179         const struct {
 180                 u8 slot_index;          /* Slot the card is installed */
 181                 char *card_name;        /* EEPROM-programmed card name */
 182                 char *dtbo_name;        /* Device tree overlay to apply */
 183                 u8 eth_offset;          /* ethXaddr MAC address index offset */
 184         } cards[] = {
 185                 {
 186                         AM65X_EVM_APP_BRD_DET,
 187                         "AM6-GPAPPEVM",
 188                         "k3-am654-gp.dtbo",
 189                         0,
 190                 },
 191                 {
 192                         AM65X_EVM_APP_BRD_DET,
 193                         "AM6-IDKAPPEVM",
 194                         "k3-am654-idk.dtbo",
 195                         3,
 196                 },
 197                 {
 198                         AM65X_EVM_SERDES_BRD_DET,
 199                         "SER-PCIE2LEVM",
 200                         "k3-am654-pcie-usb2.dtbo",
 201                         0,
 202                 },
 203                 {
 204                         AM65X_EVM_SERDES_BRD_DET,
 205                         "SER-PCIEUSBEVM",
 206                         "k3-am654-pcie-usb3.dtbo",
 207                         0,
 208                 },
 209                 {
 210                         AM65X_EVM_LCD_BRD_DET,
 211                         "OLDI-LCD1EVM",
 212                         "k3-am654-evm-oldi-lcd1evm.dtbo",
 213                         0,
 214                 },
 215         };
 216
 217         /*
 218          * Initialize GPIO used for daughtercard slot presence detection and
 219          * keep the resulting handles in local array for easier access.
 220          */
 221         for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
 222                 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
 223                                                  &board_det_gpios[i]);
 224                 if (ret < 0)
 225                         return ret;
 226         }
 227
 228         for (i = 0; i < ARRAY_SIZE(cards); i++) {
 229                 /* Obtain card-specific slot index and associated I2C address */
 230                 u8 slot_index = cards[i].slot_index;
 231                 u8 i2c_addr = slot_map[slot_index].i2c_addr;
 232
 233                 /*
 234                  * The presence detection signal is active-low, hence skip
 235                  * over this card slot if anything other than 0 is returned.
 236                  */
 237                 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
 238                 if (ret < 0)
 239                         return ret;
 240                 else if (ret)
 241                         continue;
 242
 243                 /* Get and parse the daughter card EEPROM record */
 244                 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
 245                                             &ep,
 246                                             (char **)mac_addr,
 247                                             DAUGHTER_CARD_NO_OF_MAC_ADDR,
 248                                             &mac_addr_cnt);
 249                 if (ret) {
 250                         pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
 251                                i2c_addr, ret);
 252                         /*
 253                          * Even this is pretty serious let's just skip over
 254                          * this particular daughtercard, rather than ending
 255                          * the probing process altogether.
 256                          */
 257                         continue;
 258                 }
 259
 260                 /* Only process the parsed data if we found a match */
 261                 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
 262                         continue;
 263
 264                 printf("detected %s\n", cards[i].card_name);
 265
 266                 /*
 267                  * Populate any MAC addresses from daughtercard into the U-Boot
 268                  * environment, starting with a card-specific offset so we can
 269                  * have multiple cards contribute to the MAC pool in a well-
 270                  * defined manner.
 271                  */
 272                 for (j = 0; j < mac_addr_cnt; j++) {
 273                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 274                                 continue;
 275
 276                         eth_env_set_enetaddr_by_index("eth",
 277                                                       cards[i].eth_offset + j,
 278                                                       (uchar *)mac_addr[j]);
 279                 }
 280
 281                 /* Skip if no overlays are to be added */
 282                 if (!strlen(cards[i].dtbo_name))
 283                         continue;
 284
 285                 /*
 286                  * Make sure we are not running out of buffer space by checking
 287                  * if we can fit the new overlay, a trailing space to be used
 288                  * as a separator, plus the terminating zero.
 289                  */
 290                 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
 291                     sizeof(name_overlays))
 292                         return -ENOMEM;
 293
 294                 /* Append to our list of overlays */
 295                 strcat(name_overlays, cards[i].dtbo_name);
 296                 strcat(name_overlays, " ");
 297         }
 298
 299         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 300         if (strlen(name_overlays))
 301                 return env_set("name_overlays", name_overlays);
 302
 303         return 0;
 304 }
 305
 306 int board_late_init(void)
 307 {
 308         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 309
 310         setup_board_eeprom_env();
 311
 312         /*
 313          * The first MAC address for ethernet a.k.a. ethernet0 comes from
 314          * efuse populated via the am654 gigabit eth switch subsystem driver.
 315          * All the other ones are populated via EEPROM, hence continue with
 316          * an index of 1.
 317          */
 318         board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
 319
 320         /* Check for and probe any plugged-in daughtercards */
 321         probe_daughtercards();
 322
 323         return 0;
 324 }