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