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 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/devmap.h> 33 #include <sys/lock.h> 34 #include <sys/reboot.h> 35 #include <sys/systm.h> 36 37 #include <vm/vm.h> 38 39 #include <machine/bus.h> 40 #include <machine/fdt.h> 41 #include <machine/intr.h> 42 #include <machine/machdep.h> 43 #include <machine/platformvar.h> 44 45 #include <dev/ofw/openfirm.h> 46 47 #include <arm/nvidia/tegra124/tegra124_mp.h> 48 49 #include "platform_if.h" 50 51 #define PMC_PHYSBASE 0x7000e400 52 #define PMC_SIZE 0x400 53 #define PMC_CONTROL_REG 0x0 54 #define PMC_SCRATCH0 0x50 55 #define PMC_SCRATCH0_MODE_RECOVERY (1 << 31) 56 #define PMC_SCRATCH0_MODE_BOOTLOADER (1 << 30) 57 #define PMC_SCRATCH0_MODE_RCM (1 << 1) 58 #define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \ 59 PMC_SCRATCH0_MODE_BOOTLOADER | \ 60 PMC_SCRATCH0_MODE_RCM) 61 62 static platform_attach_t tegra124_attach; 63 static platform_devmap_init_t tegra124_devmap_init; 64 static platform_late_init_t tegra124_late_init; 65 static platform_cpu_reset_t tegra124_cpu_reset; 66 67 static int 68 tegra124_attach(platform_t plat) 69 { 70 71 return (0); 72 } 73 74 static void 75 tegra124_late_init(platform_t plat) 76 { 77 78 } 79 80 /* 81 * Set up static device mappings. 82 * 83 */ 84 static int 85 tegra124_devmap_init(platform_t plat) 86 { 87 88 devmap_add_entry(0x70000000, 0x01000000); 89 return (0); 90 } 91 92 static void 93 tegra124_cpu_reset(platform_t plat) 94 { 95 bus_space_handle_t pmc; 96 uint32_t reg; 97 98 printf("Resetting...\n"); 99 bus_space_map(fdtbus_bs_tag, PMC_PHYSBASE, PMC_SIZE, 0, &pmc); 100 101 reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0); 102 reg &= PMC_SCRATCH0_MODE_MASK; 103 bus_space_write_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0, 104 reg | PMC_SCRATCH0_MODE_BOOTLOADER); /* boot to bootloader */ 105 bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0); 106 107 reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG); 108 spinlock_enter(); 109 dsb(); 110 bus_space_write_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG, reg | 0x10); 111 bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG); 112 while(1) 113 ; 114 115 } 116 117 /* 118 * Early putc routine for EARLY_PRINTF support. To use, add to kernel config: 119 * option SOCDEV_PA=0x70000000 120 * option SOCDEV_VA=0x70000000 121 * option EARLY_PRINTF 122 */ 123 #if 0 124 #ifdef EARLY_PRINTF 125 static void 126 tegra124_early_putc(int c) 127 { 128 129 volatile uint32_t * UART_STAT_REG = (uint32_t *)(0x70006314); 130 volatile uint32_t * UART_TX_REG = (uint32_t *)(0x70006300); 131 const uint32_t UART_TXRDY = (1 << 6); 132 while ((*UART_STAT_REG & UART_TXRDY) == 0) 133 continue; 134 *UART_TX_REG = c; 135 } 136 early_putc_t *early_putc = tegra124_early_putc; 137 #endif 138 #endif 139 140 static platform_method_t tegra124_methods[] = { 141 PLATFORMMETHOD(platform_attach, tegra124_attach), 142 PLATFORMMETHOD(platform_devmap_init, tegra124_devmap_init), 143 PLATFORMMETHOD(platform_late_init, tegra124_late_init), 144 PLATFORMMETHOD(platform_cpu_reset, tegra124_cpu_reset), 145 146 #ifdef SMP 147 PLATFORMMETHOD(platform_mp_start_ap, tegra124_mp_start_ap), 148 PLATFORMMETHOD(platform_mp_setmaxid, tegra124_mp_setmaxid), 149 #endif 150 PLATFORMMETHOD_END, 151 }; 152 153 FDT_PLATFORM_DEF(tegra124, "Nvidia Jetson-TK1", 0, "nvidia,jetson-tk1", 120); 154