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/*-
* Copyright 2015 John Wehle <john@feith.com>
* All rights reserved.
*
* 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.
*
*/
/*
* Amlogic aml8726 SoC identification.
*
* The SoC identification is used by some of the drivers in order to
* handle hardware differences so the identification needs to happen
* early in the boot process (e.g. before SMP startup).
*
* It's expected that the register addresses for identifying the SoC
* are set in stone.
*
* Currently missing an entry for the aml8726-m and doesn't distinguish
* between the m801, m802, m805, s802, s805, and s812 which are all
* variations of the aml8726-m8.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <arm/amlogic/aml8726/aml8726_soc.h>
uint32_t aml8726_soc_hw_rev = AML_SOC_HW_REV_UNKNOWN;
uint32_t aml8726_soc_metal_rev = AML_SOC_METAL_REV_UNKNOWN;
static const struct {
uint32_t hw_rev;
char *desc;
} aml8726_soc_desc[] = {
{ AML_SOC_HW_REV_M3, "aml8726-m3" },
{ AML_SOC_HW_REV_M6, "aml8726-m6" },
{ AML_SOC_HW_REV_M6TV, "aml8726-m6tv" },
{ AML_SOC_HW_REV_M6TVL, "aml8726-m6tvl" },
{ AML_SOC_HW_REV_M8, "aml8726-m8" },
{ AML_SOC_HW_REV_M8B, "aml8726-m8b" },
{ 0xff, NULL }
};
static const struct {
uint32_t metal_rev;
char *desc;
} aml8726_m8_soc_rev[] = {
{ AML_SOC_M8_METAL_REV_A, "A" },
{ AML_SOC_M8_METAL_REV_M2_A, "MarkII A" },
{ AML_SOC_M8_METAL_REV_B, "B" },
{ AML_SOC_M8_METAL_REV_C, "C" },
{ 0xff, NULL }
};
void
aml8726_identify_soc()
{
int err;
struct resource res;
memset(&res, 0, sizeof(res));
res.r_bustag = fdtbus_bs_tag;
err = bus_space_map(res.r_bustag, AML_SOC_CBUS_BASE_ADDR, 0x100000,
0, &res.r_bushandle);
if (err)
panic("Could not allocate resource for SoC identification\n");
aml8726_soc_hw_rev = bus_read_4(&res, AML_SOC_HW_REV_REG);
aml8726_soc_metal_rev = bus_read_4(&res, AML_SOC_METAL_REV_REG);
bus_space_unmap(res.r_bustag, res.r_bushandle, 0x100000);
}
static void
aml8726_identify_announce_soc(void *dummy)
{
int i;
for (i = 0; aml8726_soc_desc[i].desc; i++)
if (aml8726_soc_desc[i].hw_rev == aml8726_soc_hw_rev)
break;
if (aml8726_soc_desc[i].desc == NULL)
panic("Amlogic unknown aml8726 SoC %#x\n", aml8726_soc_hw_rev);
printf("Amlogic %s SoC", aml8726_soc_desc[i].desc);
if (aml8726_soc_hw_rev == AML_SOC_HW_REV_M8) {
for (i = 0; aml8726_m8_soc_rev[i].desc; i++)
if (aml8726_m8_soc_rev[i].metal_rev ==
aml8726_soc_metal_rev)
break;
if (aml8726_m8_soc_rev[i].desc == NULL)
printf(", unknown rev %#x", aml8726_soc_metal_rev);
else
printf(", rev %s", aml8726_m8_soc_rev[i].desc);
}
printf("\n");
}
SYSINIT(aml8726_identify_announce_soc, SI_SUB_CPU, SI_ORDER_SECOND,
aml8726_identify_announce_soc, NULL);
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