1 /*- 2 * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "opt_platform.h" 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/devmap.h> 35 #include <sys/lock.h> 36 #include <sys/reboot.h> 37 #include <sys/systm.h> 38 39 #include <vm/vm.h> 40 41 #include <machine/bus.h> 42 #include <machine/fdt.h> 43 #include <machine/intr.h> 44 #include <machine/machdep.h> 45 #include <machine/platformvar.h> 46 47 #include <dev/ofw/openfirm.h> 48 49 #include <arm/nvidia/tegra124/tegra124_mp.h> 50 51 #include "platform_if.h" 52 53 #define PMC_PHYSBASE 0x7000e400 54 #define PMC_SIZE 0x400 55 #define PMC_CONTROL_REG 0x0 56 #define PMC_SCRATCH0 0x50 57 #define PMC_SCRATCH0_MODE_RECOVERY (1 << 31) 58 #define PMC_SCRATCH0_MODE_BOOTLOADER (1 << 30) 59 #define PMC_SCRATCH0_MODE_RCM (1 << 1) 60 #define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \ 61 PMC_SCRATCH0_MODE_BOOTLOADER | \ 62 PMC_SCRATCH0_MODE_RCM) 63 64 static platform_attach_t tegra124_attach; 65 static platform_lastaddr_t tegra124_lastaddr; 66 static platform_devmap_init_t tegra124_devmap_init; 67 static platform_late_init_t tegra124_late_init; 68 static platform_cpu_reset_t tegra124_cpu_reset; 69 70 static int 71 tegra124_attach(platform_t plat) 72 { 73 74 return (0); 75 } 76 77 static void 78 tegra124_late_init(platform_t plat) 79 { 80 81 } 82 83 /* 84 * Set up static device mappings. 85 * 86 */ 87 static int 88 tegra124_devmap_init(platform_t plat) 89 { 90 91 devmap_add_entry(0x70000000, 0x01000000); 92 return (0); 93 } 94 95 static void 96 tegra124_cpu_reset(platform_t plat) 97 { 98 bus_space_handle_t pmc; 99 uint32_t reg; 100 101 printf("Resetting...\n"); 102 bus_space_map(fdtbus_bs_tag, PMC_PHYSBASE, PMC_SIZE, 0, &pmc); 103 104 reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0); 105 reg &= PMC_SCRATCH0_MODE_MASK; 106 bus_space_write_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0, 107 reg | PMC_SCRATCH0_MODE_BOOTLOADER); /* boot to bootloader */ 108 bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0); 109 110 reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG); 111 spinlock_enter(); 112 dsb(); 113 bus_space_write_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG, reg | 0x10); 114 bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG); 115 while(1) 116 ; 117 118 } 119 120 /* 121 * Early putc routine for EARLY_PRINTF support. To use, add to kernel config: 122 * option SOCDEV_PA=0x70000000 123 * option SOCDEV_VA=0x70000000 124 * option EARLY_PRINTF 125 */ 126 #if 0 127 #ifdef EARLY_PRINTF 128 static void 129 tegra124_early_putc(int c) 130 { 131 132 volatile uint32_t * UART_STAT_REG = (uint32_t *)(0x70006314); 133 volatile uint32_t * UART_TX_REG = (uint32_t *)(0x70006300); 134 const uint32_t UART_TXRDY = (1 << 6); 135 while ((*UART_STAT_REG & UART_TXRDY) == 0) 136 continue; 137 *UART_TX_REG = c; 138 } 139 early_putc_t *early_putc = tegra124_early_putc; 140 #endif 141 #endif 142 143 static platform_method_t tegra124_methods[] = { 144 PLATFORMMETHOD(platform_attach, tegra124_attach), 145 PLATFORMMETHOD(platform_devmap_init, tegra124_devmap_init), 146 PLATFORMMETHOD(platform_late_init, tegra124_late_init), 147 PLATFORMMETHOD(platform_cpu_reset, tegra124_cpu_reset), 148 149 #ifdef SMP 150 PLATFORMMETHOD(platform_mp_start_ap, tegra124_mp_start_ap), 151 PLATFORMMETHOD(platform_mp_setmaxid, tegra124_mp_setmaxid), 152 #endif 153 PLATFORMMETHOD_END, 154 }; 155 156 FDT_PLATFORM_DEF(tegra124, "Nvidia Jetson-TK1", 0, "nvidia,jetson-tk1", 120); 157