arch/arm/mach-tegra/common.c

   1 /*
   2  * arch/arm/mach-tegra/common.c
   3  *
   4  * Copyright (c) 2013 NVIDIA Corporation. All rights reserved.
   5  * Copyright (C) 2010 Google, Inc.
   6  *
   7  * Author:
   8  *      Colin Cross <ccross@android.com>
   9  *
  10  * This software is licensed under the terms of the GNU General Public
  11  * License version 2, as published by the Free Software Foundation, and
  12  * may be copied, distributed, and modified under those terms.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  */
  20
  21 #include <linux/init.h>
  22 #include <linux/io.h>
  23 #include <linux/clk.h>
  24 #include <linux/delay.h>
  25 #include <linux/of.h>
  26 #include <linux/reboot.h>
  27 #include <linux/irqchip.h>
  28 #include <linux/clk-provider.h>
  29
  30 #include <asm/hardware/cache-l2x0.h>
  31
  32 #include "board.h"
  33 #include "common.h"
  34 #include "cpuidle.h"
  35 #include "fuse.h"
  36 #include "iomap.h"
  37 #include "irq.h"
  38 #include "pmc.h"
  39 #include "apbio.h"
  40 #include "sleep.h"
  41 #include "pm.h"
  42 #include "reset.h"
  43
  44 /*
  45  * Storage for debug-macro.S's state.
  46  *
  47  * This must be in .data not .bss so that it gets initialized each time the
  48  * kernel is loaded. The data is declared here rather than debug-macro.S so
  49  * that multiple inclusions of debug-macro.S point at the same data.
  50  */
  51 u32 tegra_uart_config[4] = {
  52         /* Debug UART initialization required */
  53         1,
  54         /* Debug UART physical address */
  55         0,
  56         /* Debug UART virtual address */
  57         0,
  58         /* Scratch space for debug macro */
  59         0,
  60 };
  61
  62 #ifdef CONFIG_OF
  63 void __init tegra_dt_init_irq(void)
  64 {
  65         of_clk_init(NULL);
  66         tegra_pmc_init();
  67         tegra_init_irq();
  68         irqchip_init();
  69         tegra_legacy_irq_syscore_init();
  70 }
  71 #endif
  72
  73 void tegra_assert_system_reset(enum reboot_mode mode, const char *cmd)
  74 {
  75         void __iomem *reset = IO_ADDRESS(TEGRA_PMC_BASE + 0);
  76         u32 reg;
  77
  78         reg = readl_relaxed(reset);
  79         reg |= 0x10;
  80         writel_relaxed(reg, reset);
  81 }
  82
  83 static void __init tegra_init_cache(void)
  84 {
  85 #ifdef CONFIG_CACHE_L2X0
  86         static const struct of_device_id pl310_ids[] __initconst = {
  87                 { .compatible = "arm,pl310-cache",  },
  88                 {}
  89         };
  90
  91         struct device_node *np;
  92         int ret;
  93         void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
  94         u32 aux_ctrl, cache_type;
  95
  96         np = of_find_matching_node(NULL, pl310_ids);
  97         if (!np)
  98                 return;
  99
 100         cache_type = readl(p + L2X0_CACHE_TYPE);
 101         aux_ctrl = (cache_type & 0x700) << (17-8);
 102         aux_ctrl |= 0x7C400001;
 103
 104         ret = l2x0_of_init(aux_ctrl, 0x8200c3fe);
 105         if (!ret)
 106                 l2x0_saved_regs_addr = virt_to_phys(&l2x0_saved_regs);
 107 #endif
 108
 109 }
 110
 111 void __init tegra_init_early(void)
 112 {
 113         tegra_cpu_reset_handler_init();
 114         tegra_apb_io_init();
 115         tegra_init_fuse();
 116         tegra_init_cache();
 117         tegra_powergate_init();
 118         tegra_hotplug_init();
 119 }
 120
 121 void __init tegra_init_late(void)
 122 {
 123         tegra_init_suspend();
 124         tegra_cpuidle_init();
 125         tegra_powergate_debugfs_init();
 126 }