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/systm.h>
  34 #include <sys/bus.h>
  35 #include <sys/reboot.h>
  36 #include <sys/devmap.h>
  37
  38 #include <vm/vm.h>
  39
  40 #include <machine/bus.h>
  41 #include <machine/fdt.h>
  42 #include <machine/intr.h>
  43 #include <machine/machdep.h>
  44 #include <machine/platformvar.h>
  45
  46 #include <dev/ofw/openfirm.h>
  47
  48 #include <arm/nvidia/tegra124/tegra124_mp.h>
  49
  50 #include "platform_if.h"
  51
  52 #define PMC_PHYSBASE            0x7000e400
  53 #define PMC_SIZE                0x400
  54 #define PMC_CONTROL_REG         0x0
  55 #define PMC_SCRATCH0            0x50
  56 #define  PMC_SCRATCH0_MODE_RECOVERY     (1 << 31)
  57 #define  PMC_SCRATCH0_MODE_BOOTLOADER   (1 << 30)
  58 #define  PMC_SCRATCH0_MODE_RCM          (1 << 1)
  59 #define  PMC_SCRATCH0_MODE_MASK         (PMC_SCRATCH0_MODE_RECOVERY | \
  60                                         PMC_SCRATCH0_MODE_BOOTLOADER | \
  61                                         PMC_SCRATCH0_MODE_RCM)
  62
  63 static platform_attach_t tegra124_attach;
  64 static platform_lastaddr_t tegra124_lastaddr;
  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);