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linux-next/arch/arm/mach-shmobile/board-armadillo800eva-reference.c
Linus Torvalds eb3d3ec567 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into next
Pull ARM updates from Russell King:

 - Major clean-up of the L2 cache support code.  The existing mess was
   becoming rather unmaintainable through all the additions that others
   have done over time.  This turns it into a much nicer structure, and
   implements a few performance improvements as well.

 - Clean up some of the CP15 control register tweaks for alignment
   support, moving some code and data into alignment.c

 - DMA properties for ARM, from Santosh and reviewed by DT people.  This
   adds DT properties to specify bus translations we can't discover
   automatically, and to indicate whether devices are coherent.

 - Hibernation support for ARM

 - Make ftrace work with read-only text in modules

 - add suspend support for PJ4B CPUs

 - rework interrupt masking for undefined instruction handling, which
   allows us to enable interrupts earlier in the handling of these
   exceptions.

 - support for big endian page tables

 - fix stacktrace support to exclude stacktrace functions from the
   trace, and add save_stack_trace_regs() implementation so that kprobes
   can record stack traces.

 - Add support for the Cortex-A17 CPU.

 - Remove last vestiges of ARM710 support.

 - Removal of ARM "meminfo" structure, finally converting us solely to
   memblock to handle the early memory initialisation.

* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (142 commits)
  ARM: ensure C page table setup code follows assembly code (part II)
  ARM: ensure C page table setup code follows assembly code
  ARM: consolidate last remaining open-coded alignment trap enable
  ARM: remove global cr_no_alignment
  ARM: remove CPU_CP15 conditional from alignment.c
  ARM: remove unused adjust_cr() function
  ARM: move "noalign" command line option to alignment.c
  ARM: provide common method to clear bits in CPU control register
  ARM: 8025/1: Get rid of meminfo
  ARM: 8060/1: mm: allow sub-architectures to override PCI I/O memory type
  ARM: 8066/1: correction for ARM patch 8031/2
  ARM: 8049/1: ftrace/add save_stack_trace_regs() implementation
  ARM: 8065/1: remove last use of CONFIG_CPU_ARM710
  ARM: 8062/1: Modify ldrt fixup handler to re-execute the userspace instruction
  ARM: 8047/1: rwsem: use asm-generic rwsem implementation
  ARM: l2c: trial at enabling some Cortex-A9 optimisations
  ARM: l2c: add warnings for stuff modifying aux_ctrl register values
  ARM: l2c: print a warning with L2C-310 caches if the cache size is modified
  ARM: l2c: remove old .set_debug method
  ARM: l2c: kill L2X0_AUX_CTRL_MASK before anyone else makes use of this
  ...
2014-06-05 15:57:04 -07:00

197 lines
5.1 KiB
C

/*
* 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
/* Shared attribute override enable, 32K*8way */
l2x0_init(IOMEM(0xf0002000), 0x00400000, 0xc20f0fff);
#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 = shmobile_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