freebsd-dev/sys/arm/allwinner/allwinner_machdep.c
Andrew Turner 7ea3f5b654 Add support for the Allwinner A31 watchdog to the existing A10 watchdog
driver. This mostly involves selecting the register offsets to use at
runtime based on the hardware we are talking to.

Submitted by:	Emmanuel Vadot <manu@bidouilliste.com>
Differential Revision:	https://reviews.freebsd.org/D5327
2016-02-25 16:50:36 +00:00

190 lines
4.7 KiB
C

/*-
* Copyright (c) 2012 Ganbold Tsagaankhuu <ganbold@freebsd.org>
* Copyright (c) 2015-2016 Emmanuel Vadot <manu@bidouilliste.com>
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: FreeBSD: //depot/projects/arm/src/sys/arm/ti/ti_machdep.c
*/
#include "opt_ddb.h"
#include "opt_platform.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#define _ARM32_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/devmap.h>
#include <machine/machdep.h>
#include <machine/platformvar.h>
#include <dev/fdt/fdt_common.h>
#include <arm/allwinner/aw_wdog.h>
#include <arm/allwinner/allwinner_machdep.h>
#include "platform_if.h"
static u_int soc_type;
static u_int soc_family;
static int
a10_attach(platform_t plat)
{
soc_type = ALLWINNERSOC_A10;
soc_family = ALLWINNERSOC_SUN4I;
return (0);
}
static int
a20_attach(platform_t plat)
{
soc_type = ALLWINNERSOC_A20;
soc_family = ALLWINNERSOC_SUN7I;
return (0);
}
static int
a31_attach(platform_t plat)
{
soc_type = ALLWINNERSOC_A31;
soc_family = ALLWINNERSOC_SUN6I;
return (0);
}
static int
a31s_attach(platform_t plat)
{
soc_type = ALLWINNERSOC_A31S;
soc_family = ALLWINNERSOC_SUN6I;
return (0);
}
static vm_offset_t
allwinner_lastaddr(platform_t plat)
{
return (arm_devmap_lastaddr());
}
/*
* Set up static device mappings.
*
* This covers all the on-chip device with 1MB section mappings, which is good
* for performance (uses fewer TLB entries for device access).
*
* XXX It also covers a block of SRAM and some GPU (mali400) stuff that maybe
* shouldn't be device-mapped. The original code mapped a 4MB block, but
* perhaps a 1MB block would be more appropriate.
*/
static int
allwinner_devmap_init(platform_t plat)
{
arm_devmap_add_entry(0x01C00000, 0x00400000); /* 4MB */
return (0);
}
struct arm32_dma_range *
bus_dma_get_range(void)
{
return (NULL);
}
int
bus_dma_get_range_nb(void)
{
return (0);
}
void
cpu_reset()
{
aw_wdog_watchdog_reset();
printf("Reset failed!\n");
while (1);
}
static platform_method_t a10_methods[] = {
PLATFORMMETHOD(platform_attach, a10_attach),
PLATFORMMETHOD(platform_lastaddr, allwinner_lastaddr),
PLATFORMMETHOD(platform_devmap_init, allwinner_devmap_init),
PLATFORMMETHOD_END,
};
static platform_method_t a20_methods[] = {
PLATFORMMETHOD(platform_attach, a20_attach),
PLATFORMMETHOD(platform_lastaddr, allwinner_lastaddr),
PLATFORMMETHOD(platform_devmap_init, allwinner_devmap_init),
PLATFORMMETHOD_END,
};
static platform_method_t a31_methods[] = {
PLATFORMMETHOD(platform_attach, a31_attach),
PLATFORMMETHOD(platform_lastaddr, allwinner_lastaddr),
PLATFORMMETHOD(platform_devmap_init, allwinner_devmap_init),
PLATFORMMETHOD_END,
};
static platform_method_t a31s_methods[] = {
PLATFORMMETHOD(platform_attach, a31s_attach),
PLATFORMMETHOD(platform_lastaddr, allwinner_lastaddr),
PLATFORMMETHOD(platform_devmap_init, allwinner_devmap_init),
PLATFORMMETHOD_END,
};
u_int
allwinner_soc_type(void)
{
return (soc_type);
}
u_int
allwinner_soc_family(void)
{
return (soc_family);
}
FDT_PLATFORM_DEF(a10, "a10", 0, "allwinner,sun4i-a10");
FDT_PLATFORM_DEF(a20, "a20", 0, "allwinner,sun7i-a20");
FDT_PLATFORM_DEF(a31, "a31", 0, "allwinner,sun6i-a31");
FDT_PLATFORM_DEF(a31s, "a31s", 0, "allwinner,sun6i-a31s");