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