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/*
* Copyright (C) 2018 Christoph Fritz <chf.fritz@googlemail.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; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
*/
#include <common.h>
#include <init.h>
#include <platform_data/eth-fec.h>
#include <bootsource.h>
#include <mach/bbu.h>
static int ar8035_phy_fixup(struct phy_device *dev)
{
u16 val;
/* Ar803x phy SmartEEE feature cause link status generates glitch,
* which cause ethernet link down/up issue, so disable SmartEEE
*/
phy_write(dev, 0xd, 0x3);
phy_write(dev, 0xe, 0x805d);
phy_write(dev, 0xd, 0x4003);
val = phy_read(dev, 0xe);
phy_write(dev, 0xe, val & ~BIT(8));
/* To enable AR8031 ouput a 125MHz clk from CLK_25M */
phy_write(dev, 0xd, 0x7);
phy_write(dev, 0xe, 0x8016);
phy_write(dev, 0xd, 0x4007);
val = phy_read(dev, 0xe);
val &= 0xffe3;
val |= 0x18;
phy_write(dev, 0xe, val);
/* introduce tx clock delay */
phy_write(dev, 0x1d, 0x5);
val = phy_read(dev, 0x1e);
val |= 0x0100;
phy_write(dev, 0x1e, val);
return 0;
}
static int advantech_mx6_devices_init(void)
{
int ret;
char *environment_path, *envdev;
if (!of_machine_is_compatible("advantech,imx6dl-rom-7421"))
return 0;
phy_register_fixup_for_uid(0x004dd072, 0xffffffef, ar8035_phy_fixup);
switch (bootsource_get()) {
case BOOTSOURCE_MMC:
environment_path = basprintf("/chosen/environment-sd%d",
bootsource_get_instance() + 1);
if (bootsource_get_instance() + 1 == 4)
envdev = "eMMC";
else if (bootsource_get_instance() + 1 == 2)
envdev = "microSD";
else
envdev = "MMC";
break;
case BOOTSOURCE_SPI:
envdev = "SPI";
environment_path = basprintf("/chosen/environment-spi");
break;
default:
environment_path = basprintf("/chosen/environment-sd4");
envdev = "MMC";
break;
}
if (environment_path) {
ret = of_device_enable_path(environment_path);
if (ret < 0)
pr_warn("Failed to enable env partition '%s' (%d)\n",
environment_path, ret);
free(environment_path);
}
pr_notice("Using environment in %s\n", envdev);
imx6_bbu_internal_mmc_register_handler("mmc3", "/dev/mmc3",
BBU_HANDLER_FLAG_DEFAULT);
return 0;
}
device_initcall(advantech_mx6_devices_init);
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