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  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include <linux/of_platform.h>
  22 #include <linux/pinctrl/machine.h>
  23 #include <mach/common.h>
  24 #include <mach/r8a7778.h>
  25 #include <asm/mach/arch.h>
  26
  27 /*
  28  *      see board-bock.c for checking detail of dip-switch
  29  */
  30
  31 static const struct pinctrl_map bockw_pinctrl_map[] = {
  32         /* SCIF0 */
  33         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.0", "pfc-r8a7778",
  34                                   "scif0_data_a", "scif0"),
  35         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.0", "pfc-r8a7778",
  36                                   "scif0_ctrl", "scif0"),
  37 };
  38
  39 #define FPGA    0x18200000
  40 #define IRQ0MR  0x30
  41 #define COMCTLR 0x101c
  42 static void __init bockw_init(void)
  43 {
  44         static void __iomem *fpga;
  45
  46         r8a7778_clock_init();
  47         r8a7778_init_irq_extpin_dt(1);
  48
  49         pinctrl_register_mappings(bockw_pinctrl_map,
  50                                   ARRAY_SIZE(bockw_pinctrl_map));
  51         r8a7778_pinmux_init();
  52         r8a7778_add_dt_devices();
  53
  54         fpga = ioremap_nocache(FPGA, SZ_1M);
  55         if (fpga) {
  56                 /*
  57                  * CAUTION
  58                  *
  59                  * IRQ0/1 is cascaded interrupt from FPGA.
  60                  * it should be cared in the future
  61                  * Now, it is assuming IRQ0 was used only from SMSC.
  62                  */
  63                 u16 val = ioread16(fpga + IRQ0MR);
  64                 val &= ~(1 << 4); /* enable SMSC911x */
  65                 iowrite16(val, fpga + IRQ0MR);
  66         }
  67
  68         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  69 }
  70
  71 static const char *bockw_boards_compat_dt[] __initdata = {
  72         "renesas,bockw-reference",
  73         NULL,
  74 };
  75
  76 DT_MACHINE_START(BOCKW_DT, "bockw")
  77         .init_early     = r8a7778_init_delay,
  78         .init_irq       = r8a7778_init_irq_dt,
  79         .init_machine   = bockw_init,
  80         .dt_compat      = bockw_boards_compat_dt,
  81 MACHINE_END