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_devmap_init_t tegra124_devmap_init; 66 static platform_late_init_t tegra124_late_init; 67 static platform_cpu_reset_t tegra124_cpu_reset; 68 69 static int 70 tegra124_attach(platform_t plat) 71 { 72 73 return (0); 74 } 75 76 static void 77 tegra124_late_init(platform_t plat) 78 { 79 80 } 81 82 /* 83 * Set up static device mappings. 84 * 85 */ 86 static int 87 tegra124_devmap_init(platform_t plat) 88 { 89 90 devmap_add_entry(0x70000000, 0x01000000); 91 return (0); 92 } 93 94 static void 95 tegra124_cpu_reset(platform_t plat) 96 { 97 bus_space_handle_t pmc; 98 uint32_t reg; 99 100 printf("Resetting...\n"); 101 bus_space_map(fdtbus_bs_tag, PMC_PHYSBASE, PMC_SIZE, 0, &pmc); 102 103 reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0); 104 reg &= PMC_SCRATCH0_MODE_MASK; 105 bus_space_write_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0, 106 reg | PMC_SCRATCH0_MODE_BOOTLOADER); /* boot to bootloader */ 107 bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0); 108 109 reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG); 110 spinlock_enter(); 111 dsb(); 112 bus_space_write_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG, reg | 0x10); 113 bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG); 114 while(1) 115 ; 116 117 } 118 119 /* 120 * Early putc routine for EARLY_PRINTF support. To use, add to kernel config: 121 * option SOCDEV_PA=0x70000000 122 * option SOCDEV_VA=0x70000000 123 * option EARLY_PRINTF 124 */ 125 #if 0 126 #ifdef EARLY_PRINTF 127 static void 128 tegra124_early_putc(int c) 129 { 130 131 volatile uint32_t * UART_STAT_REG = (uint32_t *)(0x70006314); 132 volatile uint32_t * UART_TX_REG = (uint32_t *)(0x70006300); 133 const uint32_t UART_TXRDY = (1 << 6); 134 while ((*UART_STAT_REG & UART_TXRDY) == 0) 135 continue; 136 *UART_TX_REG = c; 137 } 138 early_putc_t *early_putc = tegra124_early_putc; 139 #endif 140 #endif 141 142 static platform_method_t tegra124_methods[] = { 143 PLATFORMMETHOD(platform_attach, tegra124_attach), 144 PLATFORMMETHOD(platform_devmap_init, tegra124_devmap_init), 145 PLATFORMMETHOD(platform_late_init, tegra124_late_init), 146 PLATFORMMETHOD(platform_cpu_reset, tegra124_cpu_reset), 147 148 #ifdef SMP 149 PLATFORMMETHOD(platform_mp_start_ap, tegra124_mp_start_ap), 150 PLATFORMMETHOD(platform_mp_setmaxid, tegra124_mp_setmaxid), 151 #endif 152 PLATFORMMETHOD_END, 153 }; 154 155 FDT_PLATFORM_DEF(tegra124, "Nvidia Jetson-TK1", 0, "nvidia,jetson-tk1", 120); 156