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 #include <wait_bit.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 enum { 18 BOARD_TYPE_PCB120 = 0xAABBCC00, 19 BOARD_TYPE_PCB123, 20 }; 21 22 void mscc_switch_reset(bool enter) 23 { 24 /* Nasty workaround to avoid GPIO19 (DDR!) being reset */ 25 mscc_gpio_set_alternate(19, 2); 26 27 debug("applying SwC reset\n"); 28 29 writel(ICPU_RESET_CORE_RST_PROTECT, BASE_CFG + ICPU_RESET); 30 writel(PERF_SOFT_RST_SOFT_CHIP_RST, BASE_DEVCPU_GCB + PERF_SOFT_RST); 31 32 if (wait_for_bit_le32(BASE_DEVCPU_GCB + PERF_SOFT_RST, 33 PERF_SOFT_RST_SOFT_CHIP_RST, false, 5000, false)) 34 pr_err("Tiemout while waiting for switch reset\n"); 35 36 /* 37 * Reset GPIO19 mode back as regular GPIO, output, high (DDR 38 * not reset) (Order is important) 39 */ 40 setbits_le32(BASE_DEVCPU_GCB + PERF_GPIO_OE, BIT(19)); 41 writel(BIT(19), BASE_DEVCPU_GCB + PERF_GPIO_OUT_SET); 42 mscc_gpio_set_alternate(19, 0); 43 } 44 45 void board_debug_uart_init(void) 46 { 47 /* too early for the pinctrl driver, so configure the UART pins here */ 48 mscc_gpio_set_alternate(6, 1); 49 mscc_gpio_set_alternate(7, 1); 50 } 51 52 int board_early_init_r(void) 53 { 54 /* Prepare SPI controller to be used in master mode */ 55 writel(0, BASE_CFG + ICPU_SW_MODE); 56 clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL, 57 ICPU_GENERAL_CTRL_IF_SI_OWNER_M, 58 ICPU_GENERAL_CTRL_IF_SI_OWNER(2)); 59 60 /* Address of boot parameters */ 61 gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE; 62 63 /* LED setup */ 64 if (IS_ENABLED(CONFIG_LED)) 65 led_default_state(); 66 67 return 0; 68 } 69 70 static void do_board_detect(void) 71 { 72 u16 dummy = 0; 73 74 /* Enable MIIM */ 75 mscc_gpio_set_alternate(14, 1); 76 mscc_gpio_set_alternate(15, 1); 77 if (mscc_phy_rd(1, 0, 0, &dummy) == 0) 78 gd->board_type = BOARD_TYPE_PCB120; 79 else 80 gd->board_type = BOARD_TYPE_PCB123; 81 } 82 83 #if defined(CONFIG_MULTI_DTB_FIT) 84 int board_fit_config_name_match(const char *name) 85 { 86 if (gd->board_type == BOARD_TYPE_PCB120 && 87 strcmp(name, "ocelot_pcb120") == 0) 88 return 0; 89 90 if (gd->board_type == BOARD_TYPE_PCB123 && 91 strcmp(name, "ocelot_pcb123") == 0) 92 return 0; 93 94 return -1; 95 } 96 #endif 97 98 #if defined(CONFIG_DTB_RESELECT) 99 int embedded_dtb_select(void) 100 { 101 do_board_detect(); 102 fdtdec_setup(); 103 104 return 0; 105 } 106 #endif 107