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 <linux/pinctrl/machine.h>
  28 #include <mach/common.h>
  29 #include <mach/r8a7740.h>
  30 #include <asm/mach/arch.h>
  31 #include <asm/hardware/cache-l2x0.h>
  32
  33 /*
  34  * CON1         Camera Module
  35  * CON2         Extension Bus
  36  * CON3         HDMI Output
  37  * CON4         Composite Video Output
  38  * CON5         H-UDI JTAG
  39  * CON6         ARM JTAG
  40  * CON7         SD1
  41  * CON8         SD2
  42  * CON9         RTC BackUp
  43  * CON10        Monaural Mic Input
  44  * CON11        Stereo Headphone Output
  45  * CON12        Audio Line Output(L)
  46  * CON13        Audio Line Output(R)
  47  * CON14        AWL13 Module
  48  * CON15        Extension
  49  * CON16        LCD1
  50  * CON17        LCD2
  51  * CON19        Power Input
  52  * CON20        USB1
  53  * CON21        USB2
  54  * CON22        Serial
  55  * CON23        LAN
  56  * CON24        USB3
  57  * LED1         Camera LED(Yellow)
  58  * LED2         Power LED (Green)
  59  * ED3-LED6     User LED(Yellow)
  60  * LED7         LAN link LED(Green)
  61  * LED8         LAN activity LED(Yellow)
  62  */
  63
  64 /*
  65  * DipSwitch
  66  *
  67  *                    SW1
  68  *
  69  * -12345678-+---------------+----------------------------
  70  *  1        | boot          | hermit
  71  *  0        | boot          | OS auto boot
  72  * -12345678-+---------------+----------------------------
  73  *   00      | boot device   | eMMC
  74  *   10      | boot device   | SDHI0 (CON7)
  75  *   01      | boot device   | -
  76  *   11      | boot device   | Extension Buss (CS0)
  77  * -12345678-+---------------+----------------------------
  78  *     0     | Extension Bus | D8-D15 disable, eMMC enable
  79  *     1     | Extension Bus | D8-D15 enable,  eMMC disable
  80  * -12345678-+---------------+----------------------------
  81  *      0    | SDHI1         | COM8 disable, COM14 enable
  82  *      1    | SDHI1         | COM8 enable,  COM14 disable
  83  * -12345678-+---------------+----------------------------
  84  *       0   | USB0          | COM20 enable,  COM24 disable
  85  *       1   | USB0          | COM20 disable, COM24 enable
  86  * -12345678-+---------------+----------------------------
  87  *        00 | JTAG          | SH-X2
  88  *        10 | JTAG          | ARM
  89  *        01 | JTAG          | -
  90  *        11 | JTAG          | Boundary Scan
  91  *-----------+---------------+----------------------------
  92  */
  93
  94 /*
  95  * FSI-WM8978
  96  *
  97  * this command is required when playback.
  98  *
  99  * # amixer set "Headphone" 50
 100  *
 101  * this command is required when capture.
 102  *
 103  * # amixer set "Input PGA" 15
 104  * # amixer set "Left Input Mixer MicP" on
 105  * # amixer set "Left Input Mixer MicN" on
 106  * # amixer set "Right Input Mixer MicN" on
 107  * # amixer set "Right Input Mixer MicP" on
 108  */
 109
 110 /*
 111  * USB function
 112  *
 113  * When you use USB Function,
 114  * set SW1.6 ON, and connect cable to CN24.
 115  *
 116  * USBF needs workaround on R8A7740 chip.
 117  * These are a little bit complex.
 118  * see
 119  *      usbhsf_power_ctrl()
 120  */
 121
 122 static const struct pinctrl_map eva_pinctrl_map[] = {
 123         /* SCIFA1 */
 124         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.1", "pfc-r8a7740",
 125                                   "scifa1_data", "scifa1"),
 126 };
 127
 128 static void __init eva_clock_init(void)
 129 {
 130         struct clk *system      = clk_get(NULL, "system_clk");
 131         struct clk *xtal1       = clk_get(NULL, "extal1");
 132         struct clk *usb24s      = clk_get(NULL, "usb24s");
 133         struct clk *fsibck      = clk_get(NULL, "fsibck");
 134
 135         if (IS_ERR(system)      ||
 136             IS_ERR(xtal1)       ||
 137             IS_ERR(usb24s)      ||
 138             IS_ERR(fsibck)) {
 139                 pr_err("armadillo800eva board clock init failed\n");
 140                 goto clock_error;
 141         }
 142
 143         /* armadillo 800 eva extal1 is 24MHz */
 144         clk_set_rate(xtal1, 24000000);
 145
 146         /* usb24s use extal1 (= system) clock (= 24MHz) */
 147         clk_set_parent(usb24s, system);
 148
 149         /* FSIBCK is 12.288MHz, and it is parent of FSI-B */
 150         clk_set_rate(fsibck, 12288000);
 151
 152 clock_error:
 153         if (!IS_ERR(system))
 154                 clk_put(system);
 155         if (!IS_ERR(xtal1))
 156                 clk_put(xtal1);
 157         if (!IS_ERR(usb24s))
 158                 clk_put(usb24s);
 159         if (!IS_ERR(fsibck))
 160                 clk_put(fsibck);
 161 }
 162
 163 /*
 164  * board init
 165  */
 166 static void __init eva_init(void)
 167 {
 168
 169         r8a7740_clock_init(MD_CK0 | MD_CK2);
 170         eva_clock_init();
 171
 172         pinctrl_register_mappings(eva_pinctrl_map, ARRAY_SIZE(eva_pinctrl_map));
 173         r8a7740_pinmux_init();
 174
 175         r8a7740_meram_workaround();
 176
 177         /*
 178          * Touchscreen
 179          * TODO: Move reset GPIO over to .dts when we can reference it
 180          */
 181         gpio_request_one(166, GPIOF_OUT_INIT_HIGH, NULL); /* TP_RST_B */
 182
 183 #ifdef CONFIG_CACHE_L2X0
 184         /* Early BRESP enable, Shared attribute override enable, 32K*8way */
 185         l2x0_init(IOMEM(0xf0002000), 0x40440000, 0x82000fff);
 186 #endif
 187
 188         r8a7740_add_standard_devices_dt();
 189         r8a7740_pm_init();
 190 }
 191
 192 #define RESCNT2 IOMEM(0xe6188020)
 193 static void eva_restart(char mode, const char *cmd)
 194 {
 195         /* Do soft power on reset */
 196         writel((1 << 31), RESCNT2);
 197 }
 198
 199 static const char *eva_boards_compat_dt[] __initdata = {
 200         "renesas,armadillo800eva-reference",
 201         NULL,
 202 };
 203
 204 DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference")
 205         .map_io         = r8a7740_map_io,
 206         .init_early     = r8a7740_init_delay,
 207         .init_irq       = r8a7740_init_irq_of,
 208         .init_machine   = eva_init,
 209         .init_time      = shmobile_timer_init,
 210         .init_late      = shmobile_init_late,
 211         .dt_compat      = eva_boards_compat_dt,
 212         .restart        = eva_restart,
 213 MACHINE_END