143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/*-
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* Copyright 2015 John Wehle <john@feith.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* Amlogic aml8726 SoC identification.
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*
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* The SoC identification is used by some of the drivers in order to
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* handle hardware differences so the identification needs to happen
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* early in the boot process (e.g. before SMP startup).
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*
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* It's expected that the register addresses for identifying the SoC
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* are set in stone.
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*
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* Currently missing an entry for the aml8726-m and doesn't distinguish
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* between the m801, m802, m805, s802, s805, and s812 which are all
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* variations of the aml8726-m8.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/fdt.h>
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#include <arm/amlogic/aml8726/aml8726_soc.h>
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uint32_t aml8726_soc_hw_rev = AML_SOC_HW_REV_UNKNOWN;
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uint32_t aml8726_soc_metal_rev = AML_SOC_METAL_REV_UNKNOWN;
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static const struct {
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uint32_t hw_rev;
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char *desc;
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} aml8726_soc_desc[] = {
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{ AML_SOC_HW_REV_M3, "aml8726-m3" },
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{ AML_SOC_HW_REV_M6, "aml8726-m6" },
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{ AML_SOC_HW_REV_M6TV, "aml8726-m6tv" },
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{ AML_SOC_HW_REV_M6TVL, "aml8726-m6tvl" },
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{ AML_SOC_HW_REV_M8, "aml8726-m8" },
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{ AML_SOC_HW_REV_M8B, "aml8726-m8b" },
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{ 0xff, NULL }
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};
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static const struct {
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uint32_t metal_rev;
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char *desc;
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} aml8726_m8_soc_rev[] = {
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{ AML_SOC_M8_METAL_REV_A, "A" },
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{ AML_SOC_M8_METAL_REV_M2_A, "MarkII A" },
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{ AML_SOC_M8_METAL_REV_B, "B" },
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{ AML_SOC_M8_METAL_REV_C, "C" },
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{ 0xff, NULL }
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};
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void
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aml8726_identify_soc(void)
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{
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int err;
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struct resource res;
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memset(&res, 0, sizeof(res));
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res.r_bustag = fdtbus_bs_tag;
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err = bus_space_map(res.r_bustag, AML_SOC_CBUS_BASE_ADDR, 0x100000,
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0, &res.r_bushandle);
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if (err)
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panic("Could not allocate resource for SoC identification\n");
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aml8726_soc_hw_rev = bus_read_4(&res, AML_SOC_HW_REV_REG);
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aml8726_soc_metal_rev = bus_read_4(&res, AML_SOC_METAL_REV_REG);
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bus_space_unmap(res.r_bustag, res.r_bushandle, 0x100000);
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}
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static void
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aml8726_identify_announce_soc(void *dummy)
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{
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int i;
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for (i = 0; aml8726_soc_desc[i].desc; i++)
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if (aml8726_soc_desc[i].hw_rev == aml8726_soc_hw_rev)
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break;
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if (aml8726_soc_desc[i].desc == NULL)
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panic("Amlogic unknown aml8726 SoC %#x\n", aml8726_soc_hw_rev);
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printf("Amlogic %s SoC", aml8726_soc_desc[i].desc);
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if (aml8726_soc_hw_rev == AML_SOC_HW_REV_M8) {
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for (i = 0; aml8726_m8_soc_rev[i].desc; i++)
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if (aml8726_m8_soc_rev[i].metal_rev ==
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aml8726_soc_metal_rev)
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break;
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if (aml8726_m8_soc_rev[i].desc == NULL)
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printf(", unknown rev %#x", aml8726_soc_metal_rev);
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else
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printf(", rev %s", aml8726_m8_soc_rev[i].desc);
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}
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printf("\n");
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}
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SYSINIT(aml8726_identify_announce_soc, SI_SUB_CPU, SI_ORDER_SECOND,
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aml8726_identify_announce_soc, NULL);
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