arch/arm/mach-shmobile/board-armadillo800eva-reference.c

   1 /*
   2  * armadillo 800 eva board support
   3  *
   4  * Copyright (C) 2012 Renesas Solutions Corp.
   5  * Copyright (C) 2012 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
  22 #include <linux/clk.h>
  23 #include <linux/err.h>
  24 #include <linux/kernel.h>
  25 #include <linux/gpio.h>
  26 #include <linux/io.h>
  27 #include <mach/common.h>
  28 #include <mach/r8a7740.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/hardware/cache-l2x0.h>
  31
  32 /*
  33  * CON1         Camera Module
  34  * CON2         Extension Bus
  35  * CON3         HDMI Output
  36  * CON4         Composite Video Output
  37  * CON5         H-UDI JTAG
  38  * CON6         ARM JTAG
  39  * CON7         SD1
  40  * CON8         SD2
  41  * CON9         RTC BackUp
  42  * CON10        Monaural Mic Input
  43  * CON11        Stereo Headphone Output
  44  * CON12        Audio Line Output(L)
  45  * CON13        Audio Line Output(R)
  46  * CON14        AWL13 Module
  47  * CON15        Extension
  48  * CON16        LCD1
  49  * CON17        LCD2
  50  * CON19        Power Input
  51  * CON20        USB1
  52  * CON21        USB2
  53  * CON22        Serial
  54  * CON23        LAN
  55  * CON24        USB3
  56  * LED1         Camera LED(Yellow)
  57  * LED2         Power LED (Green)
  58  * ED3-LED6     User LED(Yellow)
  59  * LED7         LAN link LED(Green)
  60  * LED8         LAN activity LED(Yellow)
  61  */
  62
  63 /*
  64  * DipSwitch
  65  *
  66  *                    SW1
  67  *
  68  * -12345678-+---------------+----------------------------
  69  *  1        | boot          | hermit
  70  *  0        | boot          | OS auto boot
  71  * -12345678-+---------------+----------------------------
  72  *   00      | boot device   | eMMC
  73  *   10      | boot device   | SDHI0 (CON7)
  74  *   01      | boot device   | -
  75  *   11      | boot device   | Extension Buss (CS0)
  76  * -12345678-+---------------+----------------------------
  77  *     0     | Extension Bus | D8-D15 disable, eMMC enable
  78  *     1     | Extension Bus | D8-D15 enable,  eMMC disable
  79  * -12345678-+---------------+----------------------------
  80  *      0    | SDHI1         | COM8 disable, COM14 enable
  81  *      1    | SDHI1         | COM8 enable,  COM14 disable
  82  * -12345678-+---------------+----------------------------
  83  *       0   | USB0          | COM20 enable,  COM24 disable
  84  *       1   | USB0          | COM20 disable, COM24 enable
  85  * -12345678-+---------------+----------------------------
  86  *        00 | JTAG          | SH-X2
  87  *        10 | JTAG          | ARM
  88  *        01 | JTAG          | -
  89  *        11 | JTAG          | Boundary Scan
  90  *-----------+---------------+----------------------------
  91  */
  92
  93 /*
  94  * FSI-WM8978
  95  *
  96  * this command is required when playback.
  97  *
  98  * # amixer set "Headphone" 50
  99  *
 100  * this command is required when capture.
 101  *
 102  * # amixer set "Input PGA" 15
 103  * # amixer set "Left Input Mixer MicP" on
 104  * # amixer set "Left Input Mixer MicN" on
 105  * # amixer set "Right Input Mixer MicN" on
 106  * # amixer set "Right Input Mixer MicP" on
 107  */
 108
 109 /*
 110  * USB function
 111  *
 112  * When you use USB Function,
 113  * set SW1.6 ON, and connect cable to CN24.
 114  *
 115  * USBF needs workaround on R8A7740 chip.
 116  * These are a little bit complex.
 117  * see
 118  *      usbhsf_power_ctrl()
 119  */
 120
 121 static void __init eva_clock_init(void)
 122 {
 123         struct clk *system      = clk_get(NULL, "system_clk");
 124         struct clk *xtal1       = clk_get(NULL, "extal1");
 125         struct clk *usb24s      = clk_get(NULL, "usb24s");
 126         struct clk *fsibck      = clk_get(NULL, "fsibck");
 127
 128         if (IS_ERR(system)      ||
 129             IS_ERR(xtal1)       ||
 130             IS_ERR(usb24s)      ||
 131             IS_ERR(fsibck)) {
 132                 pr_err("armadillo800eva board clock init failed\n");
 133                 goto clock_error;
 134         }
 135
 136         /* armadillo 800 eva extal1 is 24MHz */
 137         clk_set_rate(xtal1, 24000000);
 138
 139         /* usb24s use extal1 (= system) clock (= 24MHz) */
 140         clk_set_parent(usb24s, system);
 141
 142         /* FSIBCK is 12.288MHz, and it is parent of FSI-B */
 143         clk_set_rate(fsibck, 12288000);
 144
 145 clock_error:
 146         if (!IS_ERR(system))
 147                 clk_put(system);
 148         if (!IS_ERR(xtal1))
 149                 clk_put(xtal1);
 150         if (!IS_ERR(usb24s))
 151                 clk_put(usb24s);
 152         if (!IS_ERR(fsibck))
 153                 clk_put(fsibck);
 154 }
 155
 156 /*
 157  * board init
 158  */
 159 static void __init eva_init(void)
 160 {
 161         r8a7740_clock_init(MD_CK0 | MD_CK2);
 162         eva_clock_init();
 163
 164         r8a7740_meram_workaround();
 165
 166 #ifdef CONFIG_CACHE_L2X0
 167         /* Early BRESP enable, Shared attribute override enable, 32K*8way */
 168         l2x0_init(IOMEM(0xf0002000), 0x40440000, 0x82000fff);
 169 #endif
 170
 171         r8a7740_add_standard_devices_dt();
 172
 173         r8a7740_pm_init();
 174 }
 175
 176 #define RESCNT2 IOMEM(0xe6188020)
 177 static void eva_restart(enum reboot_mode mode, const char *cmd)
 178 {
 179         /* Do soft power on reset */
 180         writel(1 << 31, RESCNT2);
 181 }
 182
 183 static const char *eva_boards_compat_dt[] __initdata = {
 184         "renesas,armadillo800eva-reference",
 185         NULL,
 186 };
 187
 188 DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference")
 189         .map_io         = r8a7740_map_io,
 190         .init_early     = r8a7740_init_delay,
 191         .init_irq       = r8a7740_init_irq_of,
 192         .init_machine   = eva_init,
 193         .init_late      = shmobile_init_late,
 194         .dt_compat      = eva_boards_compat_dt,
 195         .restart        = eva_restart,
 196 MACHINE_END