board-armadillo800eva-reference.c
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/*
* armadillo 800 eva board support
*
* Copyright (C) 2012 Renesas Solutions Corp.
* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <mach/common.h>
#include <mach/r8a7740.h>
#include <asm/mach/arch.h>
#include <asm/hardware/cache-l2x0.h>
/*
* CON1 Camera Module
* CON2 Extension Bus
* CON3 HDMI Output
* CON4 Composite Video Output
* CON5 H-UDI JTAG
* CON6 ARM JTAG
* CON7 SD1
* CON8 SD2
* CON9 RTC BackUp
* CON10 Monaural Mic Input
* CON11 Stereo Headphone Output
* CON12 Audio Line Output(L)
* CON13 Audio Line Output(R)
* CON14 AWL13 Module
* CON15 Extension
* CON16 LCD1
* CON17 LCD2
* CON19 Power Input
* CON20 USB1
* CON21 USB2
* CON22 Serial
* CON23 LAN
* CON24 USB3
* LED1 Camera LED(Yellow)
* LED2 Power LED (Green)
* ED3-LED6 User LED(Yellow)
* LED7 LAN link LED(Green)
* LED8 LAN activity LED(Yellow)
*/
/*
* DipSwitch
*
* SW1
*
* -12345678-+---------------+----------------------------
* 1 | boot | hermit
* 0 | boot | OS auto boot
* -12345678-+---------------+----------------------------
* 00 | boot device | eMMC
* 10 | boot device | SDHI0 (CON7)
* 01 | boot device | -
* 11 | boot device | Extension Buss (CS0)
* -12345678-+---------------+----------------------------
* 0 | Extension Bus | D8-D15 disable, eMMC enable
* 1 | Extension Bus | D8-D15 enable, eMMC disable
* -12345678-+---------------+----------------------------
* 0 | SDHI1 | COM8 disable, COM14 enable
* 1 | SDHI1 | COM8 enable, COM14 disable
* -12345678-+---------------+----------------------------
* 0 | USB0 | COM20 enable, COM24 disable
* 1 | USB0 | COM20 disable, COM24 enable
* -12345678-+---------------+----------------------------
* 00 | JTAG | SH-X2
* 10 | JTAG | ARM
* 01 | JTAG | -
* 11 | JTAG | Boundary Scan
*-----------+---------------+----------------------------
*/
/*
* FSI-WM8978
*
* this command is required when playback.
*
* # amixer set "Headphone" 50
*
* this command is required when capture.
*
* # amixer set "Input PGA" 15
* # amixer set "Left Input Mixer MicP" on
* # amixer set "Left Input Mixer MicN" on
* # amixer set "Right Input Mixer MicN" on
* # amixer set "Right Input Mixer MicP" on
*/
/*
* USB function
*
* When you use USB Function,
* set SW1.6 ON, and connect cable to CN24.
*
* USBF needs workaround on R8A7740 chip.
* These are a little bit complex.
* see
* usbhsf_power_ctrl()
*/
static void __init eva_clock_init(void)
{
struct clk *system = clk_get(NULL, "system_clk");
struct clk *xtal1 = clk_get(NULL, "extal1");
struct clk *usb24s = clk_get(NULL, "usb24s");
struct clk *fsibck = clk_get(NULL, "fsibck");
if (IS_ERR(system) ||
IS_ERR(xtal1) ||
IS_ERR(usb24s) ||
IS_ERR(fsibck)) {
pr_err("armadillo800eva board clock init failed\n");
goto clock_error;
}
/* armadillo 800 eva extal1 is 24MHz */
clk_set_rate(xtal1, 24000000);
/* usb24s use extal1 (= system) clock (= 24MHz) */
clk_set_parent(usb24s, system);
/* FSIBCK is 12.288MHz, and it is parent of FSI-B */
clk_set_rate(fsibck, 12288000);
clock_error:
if (!IS_ERR(system))
clk_put(system);
if (!IS_ERR(xtal1))
clk_put(xtal1);
if (!IS_ERR(usb24s))
clk_put(usb24s);
if (!IS_ERR(fsibck))
clk_put(fsibck);
}
/*
* board init
*/
static void __init eva_init(void)
{
r8a7740_clock_init(MD_CK0 | MD_CK2);
eva_clock_init();
r8a7740_meram_workaround();
#ifdef CONFIG_CACHE_L2X0
/* Early BRESP enable, Shared attribute override enable, 32K*8way */
l2x0_init(IOMEM(0xf0002000), 0x40440000, 0x82000fff);
#endif
r8a7740_add_standard_devices_dt();
r8a7740_pm_init();
}
#define RESCNT2 IOMEM(0xe6188020)
static void eva_restart(enum reboot_mode mode, const char *cmd)
{
/* Do soft power on reset */
writel(1 << 31, RESCNT2);
}
static const char *eva_boards_compat_dt[] __initdata = {
"renesas,armadillo800eva-reference",
NULL,
};
DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference")
.map_io = r8a7740_map_io,
.init_early = r8a7740_init_delay,
.init_irq = r8a7740_init_irq_of,
.init_machine = eva_init,
.init_late = shmobile_init_late,
.dt_compat = eva_boards_compat_dt,
.restart = eva_restart,
MACHINE_END