arch/arm/mach-shmobile/setup-r8a7778.c

   1 /*
   2  * r8a7778 processor support
   3  *
   4  * Copyright (C) 2013  Renesas Solutions Corp.
   5  * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   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
  18 #include <linux/clk/renesas.h>
  19 #include <linux/io.h>
  20 #include <linux/irqchip.h>
  21
  22 #include <asm/mach/arch.h>
  23
  24 #include "common.h"
  25
  26 #define MODEMR 0xffcc0020
  27
  28 static void __init r8a7778_timer_init(void)
  29 {
  30         u32 mode;
  31         void __iomem *modemr = ioremap_nocache(MODEMR, 4);
  32
  33         BUG_ON(!modemr);
  34         mode = ioread32(modemr);
  35         iounmap(modemr);
  36         r8a7778_clocks_init(mode);
  37 }
  38
  39 #define INT2SMSKCR0     0x82288 /* 0xfe782288 */
  40 #define INT2SMSKCR1     0x8228c /* 0xfe78228c */
  41
  42 #define INT2NTSR0       0x00018 /* 0xfe700018 */
  43 #define INT2NTSR1       0x0002c /* 0xfe70002c */
  44
  45 static void __init r8a7778_init_irq_dt(void)
  46 {
  47         void __iomem *base = ioremap_nocache(0xfe700000, 0x00100000);
  48
  49         BUG_ON(!base);
  50
  51         irqchip_init();
  52
  53         /* route all interrupts to ARM */
  54         __raw_writel(0x73ffffff, base + INT2NTSR0);
  55         __raw_writel(0xffffffff, base + INT2NTSR1);
  56
  57         /* unmask all known interrupts in INTCS2 */
  58         __raw_writel(0x08330773, base + INT2SMSKCR0);
  59         __raw_writel(0x00311110, base + INT2SMSKCR1);
  60
  61         iounmap(base);
  62 }
  63
  64 static const char *const r8a7778_compat_dt[] __initconst = {
  65         "renesas,r8a7778",
  66         NULL,
  67 };
  68
  69 DT_MACHINE_START(R8A7778_DT, "Generic R8A7778 (Flattened Device Tree)")
  70         .init_early     = shmobile_init_delay,
  71         .init_irq       = r8a7778_init_irq_dt,
  72         .init_late      = shmobile_init_late,
  73         .init_time      = r8a7778_timer_init,
  74         .dt_compat      = r8a7778_compat_dt,
  75 MACHINE_END