arch/arm/mach-shmobile/board-bockw-reference.c

   1 /*
   2  * Bock-W board support
   3  *
   4  * Copyright (C) 2013  Renesas Solutions Corp.
   5  * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/of_platform.h>
  18
  19 #include <asm/mach/arch.h>
  20
  21 #include "common.h"
  22 #include "r8a7778.h"
  23
  24 /*
  25  *      see board-bock.c for checking detail of dip-switch
  26  */
  27
  28 #define FPGA    0x18200000
  29 #define IRQ0MR  0x30
  30 #define COMCTLR 0x101c
  31
  32 #define PFC     0xfffc0000
  33 #define PUPR4   0x110
  34 static void __init bockw_init(void)
  35 {
  36         void __iomem *fpga;
  37         void __iomem *pfc;
  38
  39 #ifndef CONFIG_COMMON_CLK
  40         r8a7778_clock_init();
  41 #endif
  42         r8a7778_init_irq_extpin_dt(1);
  43         r8a7778_add_dt_devices();
  44
  45         fpga = ioremap_nocache(FPGA, SZ_1M);
  46         if (fpga) {
  47                 /*
  48                  * CAUTION
  49                  *
  50                  * IRQ0/1 is cascaded interrupt from FPGA.
  51                  * it should be cared in the future
  52                  * Now, it is assuming IRQ0 was used only from SMSC.
  53                  */
  54                 u16 val = ioread16(fpga + IRQ0MR);
  55                 val &= ~(1 << 4); /* enable SMSC911x */
  56                 iowrite16(val, fpga + IRQ0MR);
  57
  58                 iounmap(fpga);
  59         }
  60
  61         pfc = ioremap_nocache(PFC, 0x200);
  62         if (pfc) {
  63                 /*
  64                  * FIXME
  65                  *
  66                  * SDHI CD/WP pin needs pull-up
  67                  */
  68                 iowrite32(ioread32(pfc + PUPR4) | (3 << 26), pfc + PUPR4);
  69                 iounmap(pfc);
  70         }
  71
  72         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  73 }
  74
  75 static const char *const bockw_boards_compat_dt[] __initconst = {
  76         "renesas,bockw-reference",
  77         NULL,
  78 };
  79
  80 DT_MACHINE_START(BOCKW_DT, "bockw")
  81         .init_early     = shmobile_init_delay,
  82         .init_irq       = r8a7778_init_irq_dt,
  83         .init_machine   = bockw_init,
  84         .init_late      = shmobile_init_late,
  85         .dt_compat      = bockw_boards_compat_dt,
  86 MACHINE_END