arch/arm/mach-shmobile/board-kzm9g-reference.c

   1 /*
   2  * KZM-A9-GT board support - Reference Device Tree Implementation
   3  *
   4  * Copyright (C) 2012   Horms Solutions Ltd.
   5  *
   6  * Based on board-kzm9g.c
   7  * Copyright (C) 2012   Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; version 2 of the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21  */
  22
  23 #include <linux/delay.h>
  24 #include <linux/gpio.h>
  25 #include <linux/io.h>
  26 #include <linux/irq.h>
  27 #include <linux/irqchip.h>
  28 #include <linux/input.h>
  29 #include <linux/of_platform.h>
  30 #include <linux/pinctrl/machine.h>
  31 #include <linux/pinctrl/pinconf-generic.h>
  32 #include <mach/sh73a0.h>
  33 #include <mach/common.h>
  34 #include <asm/hardware/cache-l2x0.h>
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/arch.h>
  37
  38 static unsigned long pin_pullup_conf[] = {
  39         PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 0),
  40 };
  41
  42 static const struct pinctrl_map kzm_pinctrl_map[] = {
  43         PIN_MAP_MUX_GROUP_DEFAULT("i2c-sh_mobile.3", "pfc-sh73a0",
  44                                   "i2c3_1", "i2c3"),
  45         /* MMCIF */
  46         PIN_MAP_MUX_GROUP_DEFAULT("sh_mmcif.0", "pfc-sh73a0",
  47                                   "mmc0_data8_0", "mmc0"),
  48         PIN_MAP_MUX_GROUP_DEFAULT("sh_mmcif.0", "pfc-sh73a0",
  49                                   "mmc0_ctrl_0", "mmc0"),
  50         PIN_MAP_CONFIGS_PIN_DEFAULT("sh_mmcif.0", "pfc-sh73a0",
  51                                     "PORT279", pin_pullup_conf),
  52         PIN_MAP_CONFIGS_GROUP_DEFAULT("sh_mmcif.0", "pfc-sh73a0",
  53                                       "mmc0_data8_0", pin_pullup_conf),
  54         /* SCIFA4 */
  55         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.4", "pfc-sh73a0",
  56                                   "scifa4_data", "scifa4"),
  57         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.4", "pfc-sh73a0",
  58                                   "scifa4_ctrl", "scifa4"),
  59         /* SDHI0 */
  60         PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_sdhi.0", "pfc-sh73a0",
  61                                   "sdhi0_data4", "sdhi0"),
  62         PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_sdhi.0", "pfc-sh73a0",
  63                                   "sdhi0_ctrl", "sdhi0"),
  64         PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_sdhi.0", "pfc-sh73a0",
  65                                   "sdhi0_cd", "sdhi0"),
  66         PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_sdhi.0", "pfc-sh73a0",
  67                                   "sdhi0_wp", "sdhi0"),
  68         /* SDHI2 */
  69         PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_sdhi.2", "pfc-sh73a0",
  70                                   "sdhi2_data4", "sdhi2"),
  71         PIN_MAP_MUX_GROUP_DEFAULT("sh_mobile_sdhi.2", "pfc-sh73a0",
  72                                   "sdhi2_ctrl", "sdhi2"),
  73 };
  74
  75 static void __init kzm_init(void)
  76 {
  77         sh73a0_add_standard_devices_dt();
  78         pinctrl_register_mappings(kzm_pinctrl_map, ARRAY_SIZE(kzm_pinctrl_map));
  79         sh73a0_pinmux_init();
  80
  81         /* enable SD */
  82         gpio_request(GPIO_FN_SDHI0_VCCQ_MC0_ON, NULL);
  83         gpio_request_one(GPIO_PORT15, GPIOF_OUT_INIT_HIGH, NULL); /* power */
  84
  85         gpio_request(GPIO_FN_SDHICLK2,          NULL);
  86         gpio_request_one(GPIO_PORT14, GPIOF_OUT_INIT_HIGH, NULL); /* power */
  87
  88 #ifdef CONFIG_CACHE_L2X0
  89         /* Early BRESP enable, Shared attribute override enable, 64K*8way */
  90         l2x0_init(IOMEM(0xf0100000), 0x40460000, 0x82000fff);
  91 #endif
  92 }
  93
  94 static void kzm9g_restart(char mode, const char *cmd)
  95 {
  96 #define RESCNT2 IOMEM(0xe6188020)
  97         /* Do soft power on reset */
  98         writel((1 << 31), RESCNT2);
  99 }
 100
 101 static const char *kzm9g_boards_compat_dt[] __initdata = {
 102         "renesas,kzm9g-reference",
 103         NULL,
 104 };
 105
 106 /* Please note that the clock initialisation shcheme used in
 107  * sh73a0_add_early_devices_dt() and sh73a0_add_standard_devices_dt()
 108  * does not work with SMP as there is a yet to be resolved lock-up in
 109  * workqueue initialisation.
 110  *
 111  * CONFIG_SMP should be disabled when using this code.
 112  */
 113 DT_MACHINE_START(KZM9G_DT, "kzm9g-reference")
 114         .smp            = smp_ops(sh73a0_smp_ops),
 115         .map_io         = sh73a0_map_io,
 116         .init_early     = sh73a0_init_delay,
 117         .nr_irqs        = NR_IRQS_LEGACY,
 118         .init_irq       = irqchip_init,
 119         .init_machine   = kzm_init,
 120         .init_late      = shmobile_init_late,
 121         .init_time      = shmobile_timer_init,
 122         .restart        = kzm9g_restart,
 123         .dt_compat      = kzm9g_boards_compat_dt,
 124 MACHINE_END