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/of_platform.h>
  18 #include <linux/io.h>
  19 #include <linux/time-armada-370-xp.h>
  20 #include <linux/clk/mvebu.h>
  21 #include <linux/dma-mapping.h>
  22 #include <linux/mbus.h>
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/time.h>
  26 #include "armada-370-xp.h"
  27 #include "common.h"
  28 #include "coherency.h"
  29
  30 static struct map_desc armada_370_xp_io_desc[] __initdata = {
  31         {
  32                 .virtual        = (unsigned long) ARMADA_370_XP_REGS_VIRT_BASE,
  33                 .pfn            = __phys_to_pfn(ARMADA_370_XP_REGS_PHYS_BASE),
  34                 .length         = ARMADA_370_XP_REGS_SIZE,
  35                 .type           = MT_DEVICE,
  36         },
  37 };
  38
  39 void __init armada_370_xp_map_io(void)
  40 {
  41         iotable_init(armada_370_xp_io_desc, ARRAY_SIZE(armada_370_xp_io_desc));
  42 }
  43
  44 void __init armada_370_xp_timer_and_clk_init(void)
  45 {
  46         mvebu_clocks_init();
  47         armada_370_xp_timer_init();
  48 }
  49
  50 void __init armada_370_xp_init_early(void)
  51 {
  52         char *mbus_soc_name;
  53
  54         /*
  55          * Some Armada 370/XP devices allocate their coherent buffers
  56          * from atomic context. Increase size of atomic coherent pool
  57          * to make sure such the allocations won't fail.
  58          */
  59         init_dma_coherent_pool_size(SZ_1M);
  60
  61         /*
  62          * This initialization will be replaced by a DT-based
  63          * initialization once the mvebu-mbus driver gains DT support.
  64          */
  65         if (of_machine_is_compatible("marvell,armada370"))
  66                 mbus_soc_name = "marvell,armada370-mbus";
  67         else
  68                 mbus_soc_name = "marvell,armadaxp-mbus";
  69
  70         mvebu_mbus_init(mbus_soc_name,
  71                         ARMADA_370_XP_MBUS_WINS_BASE,
  72                         ARMADA_370_XP_MBUS_WINS_SIZE,
  73                         ARMADA_370_XP_SDRAM_WINS_BASE,
  74                         ARMADA_370_XP_SDRAM_WINS_SIZE);
  75 }
  76
  77 static void __init armada_370_xp_dt_init(void)
  78 {
  79         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  80         coherency_init();
  81 }
  82
  83 static const char * const armada_370_xp_dt_compat[] = {
  84         "marvell,armada-370-xp",
  85         NULL,
  86 };
  87
  88 DT_MACHINE_START(ARMADA_XP_DT, "Marvell Armada 370/XP (Device Tree)")
  89         .smp            = smp_ops(armada_xp_smp_ops),
  90         .init_machine   = armada_370_xp_dt_init,
  91         .map_io         = armada_370_xp_map_io,
  92         .init_early     = armada_370_xp_init_early,
  93         .init_irq       = armada_370_xp_init_irq,
  94         .handle_irq     = armada_370_xp_handle_irq,
  95         .init_time      = armada_370_xp_timer_and_clk_init,
  96         .restart        = mvebu_restart,
  97         .dt_compat      = armada_370_xp_dt_compat,
  98 MACHINE_END