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 <linux/irqchip.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 struct map_desc armada_370_xp_io_desc[] __initdata = {
  33         {
  34                 .virtual        = (unsigned long) ARMADA_370_XP_REGS_VIRT_BASE,
  35                 .pfn            = __phys_to_pfn(ARMADA_370_XP_REGS_PHYS_BASE),
  36                 .length         = ARMADA_370_XP_REGS_SIZE,
  37                 .type           = MT_DEVICE,
  38         },
  39 };
  40
  41 void __init armada_370_xp_map_io(void)
  42 {
  43         iotable_init(armada_370_xp_io_desc, ARRAY_SIZE(armada_370_xp_io_desc));
  44 }
  45
  46 void __init armada_370_xp_timer_and_clk_init(void)
  47 {
  48         mvebu_clocks_init();
  49         armada_370_xp_timer_init();
  50 }
  51
  52 void __init armada_370_xp_init_early(void)
  53 {
  54         char *mbus_soc_name;
  55
  56         /*
  57          * Some Armada 370/XP devices allocate their coherent buffers
  58          * from atomic context. Increase size of atomic coherent pool
  59          * to make sure such the allocations won't fail.
  60          */
  61         init_dma_coherent_pool_size(SZ_1M);
  62
  63         /*
  64          * This initialization will be replaced by a DT-based
  65          * initialization once the mvebu-mbus driver gains DT support.
  66          */
  67         if (of_machine_is_compatible("marvell,armada370"))
  68                 mbus_soc_name = "marvell,armada370-mbus";
  69         else
  70                 mbus_soc_name = "marvell,armadaxp-mbus";
  71
  72         mvebu_mbus_init(mbus_soc_name,
  73                         ARMADA_370_XP_MBUS_WINS_BASE,
  74                         ARMADA_370_XP_MBUS_WINS_SIZE,
  75                         ARMADA_370_XP_SDRAM_WINS_BASE,
  76                         ARMADA_370_XP_SDRAM_WINS_SIZE);
  77
  78 #ifdef CONFIG_CACHE_L2X0
  79         l2x0_of_init(0, ~0UL);
  80 #endif
  81 }
  82
  83 static void __init armada_370_xp_dt_init(void)
  84 {
  85         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  86         coherency_init();
  87 }
  88
  89 static const char * const armada_370_xp_dt_compat[] = {
  90         "marvell,armada-370-xp",
  91         NULL,
  92 };
  93
  94 DT_MACHINE_START(ARMADA_XP_DT, "Marvell Armada 370/XP (Device Tree)")
  95         .smp            = smp_ops(armada_xp_smp_ops),
  96         .init_machine   = armada_370_xp_dt_init,
  97         .map_io         = armada_370_xp_map_io,
  98         .init_early     = armada_370_xp_init_early,
  99         .init_irq       = irqchip_init,
 100         .init_time      = armada_370_xp_timer_and_clk_init,
 101         .restart        = mvebu_restart,
 102         .dt_compat      = armada_370_xp_dt_compat,
 103 MACHINE_END