arch/arm/mach-mvebu/armada-370-xp.c

   1 /*
   2  * Device Tree support for Armada 370 and XP platforms.
   3  *
   4  * Copyright (C) 2012 Marvell
   5  *
   6  * Lior Amsalem <alior@marvell.com>
   7  * Gregory CLEMENT <gregory.clement@free-electrons.com>
   8  * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
   9  *
  10  * This file is licensed under the terms of the GNU General Public
  11  * License version 2.  This program is licensed "as is" without any
  12  * warranty of any kind, whether express or implied.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/clk-provider.h>
  18 #include <linux/of_address.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/io.h>
  21 #include <linux/time-armada-370-xp.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/mbus.h>
  24 #include <asm/hardware/cache-l2x0.h>
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/map.h>
  27 #include <asm/mach/time.h>
  28 #include "armada-370-xp.h"
  29 #include "common.h"
  30 #include "coherency.h"
  31
  32 static void __init armada_370_xp_map_io(void)
  33 {
  34         debug_ll_io_init();
  35 }
  36
  37 /*
  38  * This initialization will be replaced by a DT-based
  39  * initialization once the mvebu-mbus driver gains DT support.
  40  */
  41
  42 #define ARMADA_370_XP_MBUS_WINS_OFFS   0x20000
  43 #define ARMADA_370_XP_MBUS_WINS_SIZE   0x100
  44 #define ARMADA_370_XP_SDRAM_WINS_OFFS  0x20180
  45 #define ARMADA_370_XP_SDRAM_WINS_SIZE  0x20
  46
  47 static void __init armada_370_xp_mbus_init(void)
  48 {
  49         char *mbus_soc_name;
  50         struct device_node *dn;
  51         const __be32 mbus_wins_offs = cpu_to_be32(ARMADA_370_XP_MBUS_WINS_OFFS);
  52         const __be32 sdram_wins_offs = cpu_to_be32(ARMADA_370_XP_SDRAM_WINS_OFFS);
  53
  54         if (of_machine_is_compatible("marvell,armada370"))
  55                 mbus_soc_name = "marvell,armada370-mbus";
  56         else
  57                 mbus_soc_name = "marvell,armadaxp-mbus";
  58
  59         dn = of_find_node_by_name(NULL, "internal-regs");
  60         BUG_ON(!dn);
  61
  62         mvebu_mbus_init(mbus_soc_name,
  63                         of_translate_address(dn, &mbus_wins_offs),
  64                         ARMADA_370_XP_MBUS_WINS_SIZE,
  65                         of_translate_address(dn, &sdram_wins_offs),
  66                         ARMADA_370_XP_SDRAM_WINS_SIZE);
  67 }
  68
  69 static void __init armada_370_xp_timer_and_clk_init(void)
  70 {
  71         of_clk_init(NULL);
  72         armada_370_xp_timer_init();
  73         coherency_init();
  74         armada_370_xp_mbus_init();
  75 #ifdef CONFIG_CACHE_L2X0
  76         l2x0_of_init(0, ~0UL);
  77 #endif
  78 }
  79
  80 static void __init armada_370_xp_dt_init(void)
  81 {
  82         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  83 }
  84
  85 static const char * const armada_370_xp_dt_compat[] = {
  86         "marvell,armada-370-xp",
  87         NULL,
  88 };
  89
  90 DT_MACHINE_START(ARMADA_XP_DT, "Marvell Armada 370/XP (Device Tree)")
  91         .smp            = smp_ops(armada_xp_smp_ops),
  92         .init_machine   = armada_370_xp_dt_init,
  93         .map_io         = armada_370_xp_map_io,
  94         .init_time      = armada_370_xp_timer_and_clk_init,
  95         .restart        = mvebu_restart,
  96         .dt_compat      = armada_370_xp_dt_compat,
  97 MACHINE_END