board/mscc/ocelot/ocelot.c

   1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
   2 /*
   3  * Copyright (c) 2018 Microsemi Corporation
   4  */
   5
   6 #include <common.h>
   7 #include <asm/io.h>
   8 #include <asm/addrspace.h>
   9 #include <asm/types.h>
  10 #include <environment.h>
  11 #include <spi.h>
  12 #include <led.h>
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 enum {
  17         BOARD_TYPE_PCB120 = 0xAABBCC00,
  18         BOARD_TYPE_PCB123,
  19 };
  20
  21 void external_cs_manage(struct udevice *dev, bool enable)
  22 {
  23         u32 cs = spi_chip_select(dev);
  24         /* IF_SI0_OWNER, select the owner of the SI interface
  25          * Encoding: 0: SI Slave
  26          *           1: SI Boot Master
  27          *           2: SI Master Controller
  28          */
  29         if (!enable) {
  30                 writel(ICPU_SW_MODE_SW_PIN_CTRL_MODE |
  31                        ICPU_SW_MODE_SW_SPI_CS(BIT(cs)), BASE_CFG + ICPU_SW_MODE);
  32                 clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL,
  33                                 ICPU_GENERAL_CTRL_IF_SI_OWNER_M,
  34                                 ICPU_GENERAL_CTRL_IF_SI_OWNER(2));
  35         } else {
  36                 writel(0, BASE_CFG + ICPU_SW_MODE);
  37                 clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL,
  38                                 ICPU_GENERAL_CTRL_IF_SI_OWNER_M,
  39                                 ICPU_GENERAL_CTRL_IF_SI_OWNER(1));
  40         }
  41 }
  42
  43 void board_debug_uart_init(void)
  44 {
  45         /* too early for the pinctrl driver, so configure the UART pins here */
  46         mscc_gpio_set_alternate(6, 1);
  47         mscc_gpio_set_alternate(7, 1);
  48 }
  49
  50 int board_early_init_r(void)
  51 {
  52         /* Prepare SPI controller to be used in master mode */
  53         writel(0, BASE_CFG + ICPU_SW_MODE);
  54         clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL,
  55                         ICPU_GENERAL_CTRL_IF_SI_OWNER_M,
  56                         ICPU_GENERAL_CTRL_IF_SI_OWNER(2));
  57
  58         /* Address of boot parameters */
  59         gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE;
  60
  61         /* LED setup */
  62         if (IS_ENABLED(CONFIG_LED))
  63                 led_default_state();
  64
  65         return 0;
  66 }
  67
  68 static void do_board_detect(void)
  69 {
  70         u16 dummy = 0;
  71
  72         /* Enable MIIM */
  73         mscc_gpio_set_alternate(14, 1);
  74         mscc_gpio_set_alternate(15, 1);
  75         if (mscc_phy_rd(1, 0, 0, &dummy) == 0)
  76                 gd->board_type = BOARD_TYPE_PCB120;
  77         else
  78                 gd->board_type = BOARD_TYPE_PCB123;
  79 }
  80
  81 #if defined(CONFIG_MULTI_DTB_FIT)
  82 int board_fit_config_name_match(const char *name)
  83 {
  84         if (gd->board_type == BOARD_TYPE_PCB120 &&
  85             strcmp(name, "ocelot_pcb120") == 0)
  86                 return 0;
  87
  88         if (gd->board_type == BOARD_TYPE_PCB123 &&
  89             strcmp(name, "ocelot_pcb123") == 0)
  90                 return 0;
  91
  92         return -1;
  93 }
  94 #endif
  95
  96 #if defined(CONFIG_DTB_RESELECT)
  97 int embedded_dtb_select(void)
  98 {
  99         do_board_detect();
 100         fdtdec_setup();
 101
 102         return 0;
 103 }
 104 #endif