arch/arm/mach-shmobile/setup-r8a7779.c

   1 /*
   2  * r8a7779 processor support
   3  *
   4  * Copyright (C) 2011, 2013  Renesas Solutions Corp.
   5  * Copyright (C) 2011  Magnus Damm
   6  * Copyright (C) 2013  Cogent Embedded, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  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 #include <linux/clk/renesas.h>
  18 #include <linux/clocksource.h>
  19 #include <linux/init.h>
  20 #include <linux/irq.h>
  21 #include <linux/irqchip.h>
  22 #include <linux/irqchip/arm-gic.h>
  23
  24 #include <asm/mach/arch.h>
  25 #include <asm/mach/map.h>
  26
  27 #include "common.h"
  28 #include "r8a7779.h"
  29
  30 static struct map_desc r8a7779_io_desc[] __initdata = {
  31         /* 2M identity mapping for 0xf0000000 (MPCORE) */
  32         {
  33                 .virtual        = 0xf0000000,
  34                 .pfn            = __phys_to_pfn(0xf0000000),
  35                 .length         = SZ_2M,
  36                 .type           = MT_DEVICE_NONSHARED
  37         },
  38         /* 16M identity mapping for 0xfexxxxxx (DMAC-S/HPBREG/INTC2/LRAM/DBSC) */
  39         {
  40                 .virtual        = 0xfe000000,
  41                 .pfn            = __phys_to_pfn(0xfe000000),
  42                 .length         = SZ_16M,
  43                 .type           = MT_DEVICE_NONSHARED
  44         },
  45 };
  46
  47 static void __init r8a7779_map_io(void)
  48 {
  49         debug_ll_io_init();
  50         iotable_init(r8a7779_io_desc, ARRAY_SIZE(r8a7779_io_desc));
  51 }
  52
  53 /* IRQ */
  54 #define INT2SMSKCR0 IOMEM(0xfe7822a0)
  55 #define INT2SMSKCR1 IOMEM(0xfe7822a4)
  56 #define INT2SMSKCR2 IOMEM(0xfe7822a8)
  57 #define INT2SMSKCR3 IOMEM(0xfe7822ac)
  58 #define INT2SMSKCR4 IOMEM(0xfe7822b0)
  59
  60 #define INT2NTSR0 IOMEM(0xfe700060)
  61 #define INT2NTSR1 IOMEM(0xfe700064)
  62
  63 static void __init r8a7779_init_irq_dt(void)
  64 {
  65         irqchip_init();
  66
  67         /* route all interrupts to ARM */
  68         __raw_writel(0xffffffff, INT2NTSR0);
  69         __raw_writel(0x3fffffff, INT2NTSR1);
  70
  71         /* unmask all known interrupts in INTCS2 */
  72         __raw_writel(0xfffffff0, INT2SMSKCR0);
  73         __raw_writel(0xfff7ffff, INT2SMSKCR1);
  74         __raw_writel(0xfffbffdf, INT2SMSKCR2);
  75         __raw_writel(0xbffffffc, INT2SMSKCR3);
  76         __raw_writel(0x003fee3f, INT2SMSKCR4);
  77 }
  78
  79 #define MODEMR          0xffcc0020
  80
  81 static u32 __init r8a7779_read_mode_pins(void)
  82 {
  83         static u32 mode;
  84         static bool mode_valid;
  85
  86         if (!mode_valid) {
  87                 void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE);
  88                 BUG_ON(!modemr);
  89                 mode = ioread32(modemr);
  90                 iounmap(modemr);
  91                 mode_valid = true;
  92         }
  93
  94         return mode;
  95 }
  96
  97 static void __init r8a7779_init_time(void)
  98 {
  99         r8a7779_clocks_init(r8a7779_read_mode_pins());
 100         clocksource_probe();
 101 }
 102
 103 static const char *const r8a7779_compat_dt[] __initconst = {
 104         "renesas,r8a7779",
 105         NULL,
 106 };
 107
 108 DT_MACHINE_START(R8A7779_DT, "Generic R8A7779 (Flattened Device Tree)")
 109         .smp            = smp_ops(r8a7779_smp_ops),
 110         .map_io         = r8a7779_map_io,
 111         .init_early     = shmobile_init_delay,
 112         .init_time      = r8a7779_init_time,
 113         .init_irq       = r8a7779_init_irq_dt,
 114         .init_late      = shmobile_init_late,
 115         .dt_compat      = r8a7779_compat_dt,
 116 MACHINE_END