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 phys_size_t board_get_usable_ram_top(phys_size_t 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         return 0;
 119 }
 120 #endif
 121
 122 #ifdef CONFIG_TI_I2C_BOARD_DETECT
 123 int do_board_detect(void)
 124 {
 125         int ret;
 126
 127         ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
 128                                          CONFIG_EEPROM_CHIP_ADDRESS);
 129         if (ret)
 130                 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
 131                        CONFIG_EEPROM_CHIP_ADDRESS, ret);
 132
 133         return ret;
 134 }
 135
 136 int checkboard(void)
 137 {
 138         struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 139
 140         if (do_board_detect())
 141                 /* EEPROM not populated */
 142                 printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
 143         else
 144                 printf("Board: %s rev %s\n", ep->name, ep->version);
 145
 146         return 0;
 147 }
 148
 149 static void setup_board_eeprom_env(void)
 150 {
 151         char *name = "am65x";
 152
 153         if (do_board_detect())
 154                 goto invalid_eeprom;
 155
 156         if (board_is_am65x_base_board())
 157                 name = "am65x";
 158         else
 159                 printf("Unidentified board claims %s in eeprom header\n",
 160                        board_ti_get_name());
 161
 162 invalid_eeprom:
 163         set_board_info_env_am6(name);
 164 }
 165
 166 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
 167 {
 168         int ret;
 169
 170         memset(desc, 0, sizeof(*desc));
 171
 172         ret = dm_gpio_lookup_name(gpio_name, desc);
 173         if (ret < 0)
 174                 return ret;
 175
 176         /* Request GPIO, simply re-using the name as label */
 177         ret = dm_gpio_request(desc, gpio_name);
 178         if (ret < 0)
 179                 return ret;
 180
 181         return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
 182 }
 183
 184 static int probe_daughtercards(void)
 185 {
 186         struct ti_am6_eeprom ep;
 187         struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
 188         char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 189         u8 mac_addr_cnt;
 190         char name_overlays[1024] = { 0 };
 191         int i, j;
 192         int ret;
 193
 194         /*
 195          * Daughter card presence detection signal name to GPIO (via I2C I/O
 196          * expander @ address 0x38) name and EEPROM I2C address mapping.
 197          */
 198         const struct {
 199                 char *gpio_name;
 200                 u8 i2c_addr;
 201         } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
 202                 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
 203                 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
 204                 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
 205                 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
 206         };
 207
 208         /* Declaration of daughtercards to probe */
 209         const struct {
 210                 u8 slot_index;          /* Slot the card is installed */
 211                 char *card_name;        /* EEPROM-programmed card name */
 212                 char *dtbo_name;        /* Device tree overlay to apply */
 213                 u8 eth_offset;          /* ethXaddr MAC address index offset */
 214         } cards[] = {
 215                 {
 216                         AM65X_EVM_APP_BRD_DET,
 217                         "AM6-GPAPPEVM",
 218                         "k3-am654-gp.dtbo",
 219                         0,
 220                 },
 221                 {
 222                         AM65X_EVM_APP_BRD_DET,
 223                         "AM6-IDKAPPEVM",
 224                         "k3-am654-idk.dtbo",
 225                         3,
 226                 },
 227                 {
 228                         AM65X_EVM_SERDES_BRD_DET,
 229                         "SER-PCIE2LEVM",
 230                         "k3-am654-pcie-usb2.dtbo",
 231                         0,
 232                 },
 233                 {
 234                         AM65X_EVM_SERDES_BRD_DET,
 235                         "SER-PCIEUSBEVM",
 236                         "k3-am654-pcie-usb3.dtbo",
 237                         0,
 238                 },
 239                 {
 240                         AM65X_EVM_LCD_BRD_DET,
 241                         "OLDI-LCD1EVM",
 242                         "k3-am654-evm-oldi-lcd1evm.dtbo",
 243                         0,
 244                 },
 245         };
 246
 247         /*
 248          * Initialize GPIO used for daughtercard slot presence detection and
 249          * keep the resulting handles in local array for easier access.
 250          */
 251         for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
 252                 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
 253                                                  &board_det_gpios[i]);
 254                 if (ret < 0)
 255                         return ret;
 256         }
 257
 258         for (i = 0; i < ARRAY_SIZE(cards); i++) {
 259                 /* Obtain card-specific slot index and associated I2C address */
 260                 u8 slot_index = cards[i].slot_index;
 261                 u8 i2c_addr = slot_map[slot_index].i2c_addr;
 262
 263                 /*
 264                  * The presence detection signal is active-low, hence skip
 265                  * over this card slot if anything other than 0 is returned.
 266                  */
 267                 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
 268                 if (ret < 0)
 269                         return ret;
 270                 else if (ret)
 271                         continue;
 272
 273                 /* Get and parse the daughter card EEPROM record */
 274                 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
 275                                             &ep,
 276                                             (char **)mac_addr,
 277                                             DAUGHTER_CARD_NO_OF_MAC_ADDR,
 278                                             &mac_addr_cnt);
 279                 if (ret) {
 280                         pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
 281                                i2c_addr, ret);
 282                         /*
 283                          * Even this is pretty serious let's just skip over
 284                          * this particular daughtercard, rather than ending
 285                          * the probing process altogether.
 286                          */
 287                         continue;
 288                 }
 289
 290                 /* Only process the parsed data if we found a match */
 291                 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
 292                         continue;
 293
 294                 printf("Detected: %s rev %s\n", ep.name, ep.version);
 295
 296                 /*
 297                  * Populate any MAC addresses from daughtercard into the U-Boot
 298                  * environment, starting with a card-specific offset so we can
 299                  * have multiple cards contribute to the MAC pool in a well-
 300                  * defined manner.
 301                  */
 302                 for (j = 0; j < mac_addr_cnt; j++) {
 303                         if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 304                                 continue;
 305
 306                         eth_env_set_enetaddr_by_index("eth",
 307                                                       cards[i].eth_offset + j,
 308                                                       (uchar *)mac_addr[j]);
 309                 }
 310
 311                 /*
 312                  * It has been observed that setting SERDES0 lane mux to USB prevents USB
 313                  * 2.0 operation on USB0. Setting SERDES0 lane mux to non-USB when USB0 is
 314                  * used in USB 2.0 only mode solves this issue. For USB3.0+2.0 operation
 315                  * this issue is not present.
 316                  *
 317                  * Implement this workaround by writing 1 to LANE_FUNC_SEL field in
 318                  * CTRLMMR_SERDES0_CTRL register.
 319                  */
 320                 if (!strncmp(ep.name, "SER-PCIE2LEVM", sizeof(ep.name)))
 321                         writel(PCIE_LANE0, CTRLMMR_SERDES0_CTRL);
 322
 323                 /* Skip if no overlays are to be added */
 324                 if (!strlen(cards[i].dtbo_name))
 325                         continue;
 326
 327                 /*
 328                  * Make sure we are not running out of buffer space by checking
 329                  * if we can fit the new overlay, a trailing space to be used
 330                  * as a separator, plus the terminating zero.
 331                  */
 332                 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
 333                     sizeof(name_overlays))
 334                         return -ENOMEM;
 335
 336                 /* Append to our list of overlays */
 337                 strcat(name_overlays, cards[i].dtbo_name);
 338                 strcat(name_overlays, " ");
 339         }
 340
 341         /* Apply device tree overlay(s) to the U-Boot environment, if any */
 342         if (strlen(name_overlays))
 343                 return env_set("name_overlays", name_overlays);
 344
 345         return 0;
 346 }
 347 #endif
 348
 349 int board_late_init(void)
 350 {
 351         if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
 352                 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
 353
 354                 setup_board_eeprom_env();
 355
 356                 /*
 357                  * The first MAC address for ethernet a.k.a. ethernet0 comes from
 358                  * efuse populated via the am654 gigabit eth switch subsystem driver.
 359                  * All the other ones are populated via EEPROM, hence continue with
 360                  * an index of 1.
 361                  */
 362                 board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
 363
 364                 /* Check for and probe any plugged-in daughtercards */
 365                 probe_daughtercards();
 366         }
 367
 368         return 0;
 369 }