sys/arm/nvidia/tegra124/tegra124_machdep.c

   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);