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/global_data.h>
  19 #include <asm/gpio.h>
  20 #include <asm/io.h>
  21 #include <asm/omap_common.h>
  22 #include <env.h>
  23 #include <spl.h>
  24 #include <asm/arch/sys_proto.h>
  25
  26 #include "../common/board_detect.h"
  27
  28 #define board_is_am65x_base_board()     board_ti_is("AM6-COMPROCEVM")
  29
  30 /* Daughter card presence detection signals */
  31 enum {
  32         AM65X_EVM_APP_BRD_DET,
  33         AM65X_EVM_LCD_BRD_DET,
  34         AM65X_EVM_SERDES_BRD_DET,
  35         AM65X_EVM_HDMI_GPMC_BRD_DET,
  36         AM65X_EVM_BRD_DET_COUNT,
  37 };
  38
  39 /* Max number of MAC addresses that are parsed/processed per daughter card */
  40 #define DAUGHTER_CARD_NO_OF_MAC_ADDR    8
  41
  42 /* Regiter that controls the SERDES0 lane and clock assignment */
  43 #define CTRLMMR_SERDES0_CTRL    0x00104080
  44 #define PCIE_LANE0              0x1
  45
  46 DECLARE_GLOBAL_DATA_PTR;
  47
  48 int board_init(void)
  49 {
  50         return 0;
  51 }
  52
  53 int dram_init(void)
  54 {
  55 #ifdef CONFIG_PHYS_64BIT
  56         gd->ram_size = 0x100000000;
  57 #else
  58         gd->ram_size = 0x80000000;
  59 #endif
  60
  61         return 0;
  62 }
  63
  64 ulong board_get_usable_ram_top(ulong total_size)
  65 {
  66 #ifdef CONFIG_PHYS_64BIT
  67         /* Limit RAM used by U-Boot to the DDR low region */
  68         if (gd->ram_top > 0x100000000)
  69                 return 0x100000000;
  70 #endif
  71
  72         return gd->ram_top;
  73 }
  74
  75 int dram_init_banksize(void)
  76 {
  77         /* Bank 0 declares the memory available in the DDR low region */
  78         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
  79         gd->bd->bi_dram[0].size = 0x80000000;
  80         gd->ram_size = 0x80000000;
  81
  82 #ifdef CONFIG_PHYS_64BIT
  83         /* Bank 1 declares the memory available in the DDR high region */
  84         gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
  85         gd->bd->bi_dram[1].size = 0x80000000;
  86         gd->ram_size = 0x100000000;
  87 #endif
  88
  89         return 0;
  90 }
  91
  92 #ifdef CONFIG_SPL_LOAD_FIT
  93 int board_fit_config_name_match(const char *name)
  94 {
  95 #ifdef CONFIG_TARGET_AM654_A53_EVM
  96         if (!strcmp(name, "k3-am654-base-board"))
  97                 return 0;
  98 #endif
  99
 100         return -1;
 101 }
 102 #endif
 103
 104 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
 105 int ft_board_setup(void *blob, struct bd_info *bd)
 106 {
 107         int ret;
 108
 109         ret = fdt_fixup_msmc_ram(blob, "/bus@100000", "sram@70000000");
 110         if (ret < 0)
 111                 ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000",
 112                                          "sram@70000000");
 113         if (ret) {
 114                 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
 115                 return ret;
 116         }
 117
 118 #if defined(CONFIG_TI_SECURE_DEVICE)
 119         /* Make Crypto HW reserved for secure world use */
 120         ret = fdt_disable_node(blob, "/bus@100000/crypto@4e00000");
 121         if (ret < 0)
 122                 ret = fdt_disable_node(blob,
 123                                        "/interconnect@100000/crypto@4E00000");
 124         if (ret)
 125                 printf("%s: disabling SA2UL failed %d\n", __func__, ret);
 126 #endif
 127
 128         return 0;
 129 }
 130 #endif
 131
 132 #ifdef CONFIG_TI_I2C_BOARD_DETECT
 133 int do_board_detect(void)
 134 {
 135         int ret;
 136
 137         ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
 138                                          CONFIG_EEPROM_CHIP_ADDRESS);
 139         if (ret)
 140                 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
 141                        CONFIG_EEPROM_CHIP_ADDRESS, ret);
 142
 143         return ret;
 144 }
 145
 146 int checkboard(void)
 147 {
 148         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 149
 150         if (do_board_detect())
 151                 /* EEPROM not populated */
 152                 printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
 153         else
 154                 printf("Board: %s rev %s\n", ep->name, ep->version);
 155
 156         return 0;
 157 }
 158
 159 static void setup_board_eeprom_env(void)
 160 {
 161         char *name = "am65x";
 162
 163         if (do_board_detect())
 164                 goto invalid_eeprom;
 165
 166         if (board_is_am65x_base_board())
 167                 name = "am65x";
 168         else
 169                 printf("Unidentified board claims %s in eeprom header\n",
 170                        board_ti_get_name());
 171
 172 invalid_eeprom:
 173         set_board_info_env_am6(name);
 174 }
 175
 176 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
 177 {
 178         int ret;
 179
 180         memset(desc, 0, sizeof(*desc));
 181
 182         ret = dm_gpio_lookup_name(gpio_name, desc);
 183         if (ret < 0)
 184                 return ret;
 185
 186         /* Request GPIO, simply re-using the name as label */
 187         ret = dm_gpio_request(desc, gpio_name);
 188         if (ret < 0)
 189                 return ret;
 190
 191         return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
 192 }
 193
 194 static int probe_daughtercards(void)
 195 {
 196         struct ti_am6_eeprom ep;
 197         struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
 198         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 199         u8 mac_addr_cnt;
 200         char name_overlays[1024] = { 0 };
 201         int i, j;
 202         int ret;
 203
 204         /*
 205          * Daughter card presence detection signal name to GPIO (via I2C I/O
 206          * expander @ address 0x38) name and EEPROM I2C address mapping.
 207          */
 208         const struct {
 209                 char *gpio_name;
 210                 u8 i2c_addr;
 211         } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
 212                 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
 213                 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
 214                 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
 215                 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
 216         };
 217
 218         /* Declaration of daughtercards to probe */
 219         const struct {
 220                 u8 slot_index;          /* Slot the card is installed */
 221                 char *card_name;        /* EEPROM-programmed card name */
 222                 char *dtbo_name;        /* Device tree overlay to apply */
 223                 u8 eth_offset;          /* ethXaddr MAC address index offset */
 224         } cards[] = {
 225                 {
 226                         AM65X_EVM_APP_BRD_DET,
 227                         "AM6-GPAPPEVM",
 228                         "k3-am654-gp.dtbo",
 229                         0,
 230                 },
 231                 {
 232                         AM65X_EVM_APP_BRD_DET,
 233                         "AM6-IDKAPPEVM",
 234                         "k3-am654-idk.dtbo",
 235                         3,
 236                 },
 237                 {
 238                         AM65X_EVM_SERDES_BRD_DET,
 239                         "SER-PCIE2LEVM",
 240                         "k3-am654-pcie-usb2.dtbo",
 241                         0,
 242                 },
 243                 {
 244                         AM65X_EVM_SERDES_BRD_DET,
 245                         "SER-PCIEUSBEVM",
 246                         "k3-am654-pcie-usb3.dtbo",
 247                         0,
 248                 },
 249                 {
 250                         AM65X_EVM_LCD_BRD_DET,
 251                         "OLDI-LCD1EVM",
 252                         "k3-am654-evm-oldi-lcd1evm.dtbo",
 253                         0,
 254                 },
 255         };
 256
 257         /*
 258          * Initialize GPIO used for daughtercard slot presence detection and
 259          * keep the resulting handles in local array for easier access.
 260          */
 261         for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
 262                 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
 263                                                  &board_det_gpios[i]);
 264                 if (ret < 0)
 265                         return ret;
 266         }
 267
 268         for (i = 0; i < ARRAY_SIZE(cards); i++) {
 269                 /* Obtain card-specific slot index and associated I2C address */
 270                 u8 slot_index = cards[i].slot_index;
 271                 u8 i2c_addr = slot_map[slot_index].i2c_addr;
 272
 273                 /*
 274                  * The presence detection signal is active-low, hence skip
 275                  * over this card slot if anything other than 0 is returned.
 276                  */
 277                 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
 278                 if (ret < 0)
 279                         return ret;
 280                 else if (ret)
 281                         continue;
 282
 283                 /* Get and parse the daughter card EEPROM record */
 284                 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
 285                                             &ep,
 286                                             (char **)mac_addr,
 287                                             DAUGHTER_CARD_NO_OF_MAC_ADDR,
 288                                             &mac_addr_cnt);
 289                 if (ret) {
 290                         pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
 291                                i2c_addr, ret);
 292                         /*
 293                          * Even this is pretty serious let's just skip over
 294                          * this particular daughtercard, rather than ending
 295                          * the probing process altogether.
 296                          */
 297                         continue;
 298                 }
 299
 300                 /* Only process the parsed data if we found a match */
 301                 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
 302                         continue;
 303
 304                 printf("Detected: %s rev %s\n", ep.name, ep.version);
 305
 306                 /*
 307                  * Populate any MAC addresses from daughtercard into the U-Boot
 308                  * environment, starting with a card-specific offset so we can
 309                  * have multiple cards contribute to the MAC pool in a well-
 310                  * defined manner.
 311                  */
 312                 for (j = 0; j < mac_addr_cnt; j++) {
 313                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 314                                 continue;
 315
 316                         eth_env_set_enetaddr_by_index("eth",
 317                                                       cards[i].eth_offset + j,
 318                                                       (uchar *)mac_addr[j]);
 319                 }
 320
 321                 /*
 322                  * It has been observed that setting SERDES0 lane mux to USB prevents USB
 323                  * 2.0 operation on USB0. Setting SERDES0 lane mux to non-USB when USB0 is
 324                  * used in USB 2.0 only mode solves this issue. For USB3.0+2.0 operation
 325                  * this issue is not present.
 326                  *
 327                  * Implement this workaround by writing 1 to LANE_FUNC_SEL field in
 328                  * CTRLMMR_SERDES0_CTRL register.
 329                  */
 330                 if (!strncmp(ep.name, "SER-PCIE2LEVM", sizeof(ep.name)))
 331                         writel(PCIE_LANE0, CTRLMMR_SERDES0_CTRL);
 332
 333                 /* Skip if no overlays are to be added */
 334                 if (!strlen(cards[i].dtbo_name))
 335                         continue;
 336
 337                 /*
 338                  * Make sure we are not running out of buffer space by checking
 339                  * if we can fit the new overlay, a trailing space to be used
 340                  * as a separator, plus the terminating zero.
 341                  */
 342                 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
 343                     sizeof(name_overlays))
 344                         return -ENOMEM;
 345
 346                 /* Append to our list of overlays */
 347                 strcat(name_overlays, cards[i].dtbo_name);
 348                 strcat(name_overlays, " ");
 349         }
 350
 351         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 352         if (strlen(name_overlays))
 353                 return env_set("name_overlays", name_overlays);
 354
 355         return 0;
 356 }
 357 #endif
 358
 359 int board_late_init(void)
 360 {
 361         if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
 362                 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 363
 364                 setup_board_eeprom_env();
 365
 366                 /*
 367                  * The first MAC address for ethernet a.k.a. ethernet0 comes from
 368                  * efuse populated via the am654 gigabit eth switch subsystem driver.
 369                  * All the other ones are populated via EEPROM, hence continue with
 370                  * an index of 1.
 371                  */
 372                 board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
 373
 374                 /* Check for and probe any plugged-in daughtercards */
 375                 probe_daughtercards();
 376         }
 377
 378         return 0;
 379 }