LXR linux/arch/arm/mach-tegra/tegra.c

   1/*
   2 * NVIDIA Tegra SoC device tree board support
   3 *
   4 * Copyright (C) 2011, 2013, NVIDIA Corporation
   5 * Copyright (C) 2010 Secret Lab Technologies, Ltd.
   6 * Copyright (C) 2010 Google, Inc.
   7 *
   8 * This software is licensed under the terms of the GNU General Public
   9 * License version 2, as published by the Free Software Foundation, and
  10 * may be copied, distributed, and modified under those terms.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 */
  18
  19#include <linux/clk.h>
  20#include <linux/clk/tegra.h>
  21#include <linux/dma-mapping.h>
  22#include <linux/init.h>
  23#include <linux/io.h>
  24#include <linux/irqchip.h>
  25#include <linux/irqdomain.h>
  26#include <linux/kernel.h>
  27#include <linux/of_address.h>
  28#include <linux/of_fdt.h>
  29#include <linux/of.h>
  30#include <linux/of_platform.h>
  31#include <linux/pda_power.h>
  32#include <linux/platform_device.h>
  33#include <linux/serial_8250.h>
  34#include <linux/slab.h>
  35#include <linux/sys_soc.h>
  36#include <linux/usb/tegra_usb_phy.h>
  37
  38#include <soc/tegra/fuse.h>
  39#include <soc/tegra/pmc.h>
  40
  41#include <asm/hardware/cache-l2x0.h>
  42#include <asm/mach/arch.h>
  43#include <asm/mach/time.h>
  44#include <asm/mach-types.h>
  45#include <asm/setup.h>
  46#include <asm/trusted_foundations.h>
  47
  48#include "board.h"
  49#include "common.h"
  50#include "cpuidle.h"
  51#include "flowctrl.h"
  52#include "iomap.h"
  53#include "irq.h"
  54#include "pm.h"
  55#include "reset.h"
  56#include "sleep.h"
  57
  58/*
  59 * Storage for debug-macro.S's state.
  60 *
  61 * This must be in .data not .bss so that it gets initialized each time the
  62 * kernel is loaded. The data is declared here rather than debug-macro.S so
  63 * that multiple inclusions of debug-macro.S point at the same data.
  64 */
  65u32 tegra_uart_config[3] = {
  66        /* Debug UART initialization required */
  67        1,
  68        /* Debug UART physical address */
  69        0,
  70        /* Debug UART virtual address */
  71        0,
  72};
  73
  74static void __init tegra_init_early(void)
  75{
  76        of_register_trusted_foundations();
  77        tegra_cpu_reset_handler_init();
  78        tegra_flowctrl_init();
  79}
  80
  81static void __init tegra_dt_init_irq(void)
  82{
  83        tegra_init_irq();
  84        irqchip_init();
  85}
  86
  87static void __init tegra_dt_init(void)
  88{
  89        struct soc_device_attribute *soc_dev_attr;
  90        struct soc_device *soc_dev;
  91        struct device *parent = NULL;
  92
  93        soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
  94        if (!soc_dev_attr)
  95                goto out;
  96
  97        soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
  98        soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d",
  99                                           tegra_sku_info.revision);
 100        soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%u", tegra_get_chip_id());
 101
 102        soc_dev = soc_device_register(soc_dev_attr);
 103        if (IS_ERR(soc_dev)) {
 104                kfree(soc_dev_attr->family);
 105                kfree(soc_dev_attr->revision);
 106                kfree(soc_dev_attr->soc_id);
 107                kfree(soc_dev_attr);
 108                goto out;
 109        }
 110
 111        parent = soc_device_to_device(soc_dev);
 112
 113        /*
 114         * Finished with the static registrations now; fill in the missing
 115         * devices
 116         */
 117out:
 118        of_platform_populate(NULL, of_default_bus_match_table, NULL, parent);
 119}
 120
 121static void __init paz00_init(void)
 122{
 123        if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
 124                tegra_paz00_wifikill_init();
 125}
 126
 127static struct {
 128        char *machine;
 129        void (*init)(void);
 130} board_init_funcs[] = {
 131        { "compal,paz00", paz00_init },
 132};
 133
 134static void __init tegra_dt_init_late(void)
 135{
 136        int i;
 137
 138        tegra_init_suspend();
 139        tegra_cpuidle_init();
 140
 141        for (i = 0; i < ARRAY_SIZE(board_init_funcs); i++) {
 142                if (of_machine_is_compatible(board_init_funcs[i].machine)) {
 143                        board_init_funcs[i].init();
 144                        break;
 145                }
 146        }
 147}
 148
 149static const char * const tegra_dt_board_compat[] = {
 150        "nvidia,tegra124",
 151        "nvidia,tegra114",
 152        "nvidia,tegra30",
 153        "nvidia,tegra20",
 154        NULL
 155};
 156
 157DT_MACHINE_START(TEGRA_DT, "NVIDIA Tegra SoC (Flattened Device Tree)")
 158        .l2c_aux_val    = 0x3c400001,
 159        .l2c_aux_mask   = 0xc20fc3fe,
 160        .smp            = smp_ops(tegra_smp_ops),
 161        .map_io         = tegra_map_common_io,
 162        .init_early     = tegra_init_early,
 163        .init_irq       = tegra_dt_init_irq,
 164        .init_machine   = tegra_dt_init,
 165        .init_late      = tegra_dt_init_late,
 166        .restart        = tegra_pmc_restart,
 167        .dt_compat      = tegra_dt_board_compat,
 168MACHINE_END
 169