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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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76b92b4043
Provide alternate board code for the Armadillo800EVA to demonstrate how DT may be used given the current state of driver device tree support. This is intended to act as a reference for mach-shmobile developers. This a rather bare bone version with the following devices supported: - GIC - irqpins - i2c0/1 - touchscreen Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
214 lines
5.6 KiB
C
214 lines
5.6 KiB
C
/*
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* armadillo 800 eva board support
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*
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* Copyright (C) 2012 Renesas Solutions Corp.
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* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <linux/pinctrl/machine.h>
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#include <mach/common.h>
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#include <mach/r8a7740.h>
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#include <asm/mach/arch.h>
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#include <asm/hardware/cache-l2x0.h>
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/*
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* CON1 Camera Module
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* CON2 Extension Bus
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* CON3 HDMI Output
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* CON4 Composite Video Output
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* CON5 H-UDI JTAG
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* CON6 ARM JTAG
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* CON7 SD1
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* CON8 SD2
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* CON9 RTC BackUp
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* CON10 Monaural Mic Input
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* CON11 Stereo Headphone Output
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* CON12 Audio Line Output(L)
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* CON13 Audio Line Output(R)
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* CON14 AWL13 Module
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* CON15 Extension
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* CON16 LCD1
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* CON17 LCD2
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* CON19 Power Input
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* CON20 USB1
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* CON21 USB2
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* CON22 Serial
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* CON23 LAN
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* CON24 USB3
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* LED1 Camera LED(Yellow)
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* LED2 Power LED (Green)
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* ED3-LED6 User LED(Yellow)
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* LED7 LAN link LED(Green)
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* LED8 LAN activity LED(Yellow)
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*/
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/*
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* DipSwitch
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*
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* SW1
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*
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* -12345678-+---------------+----------------------------
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* 1 | boot | hermit
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* 0 | boot | OS auto boot
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* -12345678-+---------------+----------------------------
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* 00 | boot device | eMMC
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* 10 | boot device | SDHI0 (CON7)
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* 01 | boot device | -
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* 11 | boot device | Extension Buss (CS0)
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* -12345678-+---------------+----------------------------
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* 0 | Extension Bus | D8-D15 disable, eMMC enable
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* 1 | Extension Bus | D8-D15 enable, eMMC disable
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* -12345678-+---------------+----------------------------
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* 0 | SDHI1 | COM8 disable, COM14 enable
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* 1 | SDHI1 | COM8 enable, COM14 disable
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* -12345678-+---------------+----------------------------
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* 0 | USB0 | COM20 enable, COM24 disable
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* 1 | USB0 | COM20 disable, COM24 enable
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* -12345678-+---------------+----------------------------
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* 00 | JTAG | SH-X2
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* 10 | JTAG | ARM
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* 01 | JTAG | -
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* 11 | JTAG | Boundary Scan
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*-----------+---------------+----------------------------
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*/
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/*
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* FSI-WM8978
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*
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* this command is required when playback.
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*
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* # amixer set "Headphone" 50
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*
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* this command is required when capture.
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*
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* # amixer set "Input PGA" 15
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* # amixer set "Left Input Mixer MicP" on
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* # amixer set "Left Input Mixer MicN" on
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* # amixer set "Right Input Mixer MicN" on
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* # amixer set "Right Input Mixer MicP" on
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*/
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/*
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* USB function
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*
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* When you use USB Function,
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* set SW1.6 ON, and connect cable to CN24.
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*
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* USBF needs workaround on R8A7740 chip.
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* These are a little bit complex.
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* see
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* usbhsf_power_ctrl()
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*/
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static const struct pinctrl_map eva_pinctrl_map[] = {
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/* SCIFA1 */
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PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.1", "pfc-r8a7740",
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"scifa1_data", "scifa1"),
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};
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static void __init eva_clock_init(void)
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{
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struct clk *system = clk_get(NULL, "system_clk");
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struct clk *xtal1 = clk_get(NULL, "extal1");
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struct clk *usb24s = clk_get(NULL, "usb24s");
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struct clk *fsibck = clk_get(NULL, "fsibck");
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if (IS_ERR(system) ||
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IS_ERR(xtal1) ||
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IS_ERR(usb24s) ||
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IS_ERR(fsibck)) {
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pr_err("armadillo800eva board clock init failed\n");
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goto clock_error;
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}
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/* armadillo 800 eva extal1 is 24MHz */
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clk_set_rate(xtal1, 24000000);
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/* usb24s use extal1 (= system) clock (= 24MHz) */
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clk_set_parent(usb24s, system);
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/* FSIBCK is 12.288MHz, and it is parent of FSI-B */
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clk_set_rate(fsibck, 12288000);
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clock_error:
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if (!IS_ERR(system))
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clk_put(system);
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if (!IS_ERR(xtal1))
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clk_put(xtal1);
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if (!IS_ERR(usb24s))
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clk_put(usb24s);
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if (!IS_ERR(fsibck))
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clk_put(fsibck);
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}
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/*
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* board init
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*/
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static void __init eva_init(void)
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{
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r8a7740_clock_init(MD_CK0 | MD_CK2);
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eva_clock_init();
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pinctrl_register_mappings(eva_pinctrl_map, ARRAY_SIZE(eva_pinctrl_map));
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r8a7740_pinmux_init();
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r8a7740_meram_workaround();
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/*
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* Touchscreen
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* TODO: Move reset GPIO over to .dts when we can reference it
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*/
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gpio_request_one(166, GPIOF_OUT_INIT_HIGH, NULL); /* TP_RST_B */
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#ifdef CONFIG_CACHE_L2X0
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/* Early BRESP enable, Shared attribute override enable, 32K*8way */
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l2x0_init(IOMEM(0xf0002000), 0x40440000, 0x82000fff);
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#endif
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r8a7740_add_standard_devices_dt();
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r8a7740_pm_init();
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}
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#define RESCNT2 IOMEM(0xe6188020)
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static void eva_restart(char mode, const char *cmd)
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{
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/* Do soft power on reset */
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writel((1 << 31), RESCNT2);
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}
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static const char *eva_boards_compat_dt[] __initdata = {
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"renesas,armadillo800eva-reference",
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NULL,
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};
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DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference")
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.map_io = r8a7740_map_io,
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.init_early = r8a7740_init_delay,
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.init_irq = r8a7740_init_irq_of,
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.init_machine = eva_init,
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.init_time = shmobile_timer_init,
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.init_late = shmobile_init_late,
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.dt_compat = eva_boards_compat_dt,
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.restart = eva_restart,
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MACHINE_END
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