oxnas: reboot target

Reboot the oxnas target based on Linux 4.14 by rebasing our support on
top of the now-existing upstream kernel support.
This commit brings oxnas support to the level of v4.17 having upstream
drivers for Ethernet, Serial and NAND flash.
Botch up OpenWrt's local drivers for EHCI, SATA and PCIe based on the
new platform code and device-tree.
Re-introduce base-files from old oxnas target which works for now but
needs further clean-up towards generic board support.

Functional issues:
 * PCIe won't come up (hence no USB3 on Shuttle KD20)
 * I2C bus of Akitio myCloud device is likely not to work (missing
   debounce support in new pinctrl driver)

Code-style issues:
 * plla/pllb needs further cleanup -- currently their users are writing
   into the syscon regmap after acquireling the clk instead of using
   defined clk_*_*() functions to setup multipliers and dividors.
 * PCIe phy needs its own little driver.
 * SATA driver is a monster and should be split into an mfd having
   a raidctrl regmap, sata controller, sata ports and sata phy.

Tested on MitraStar STG-212 aka. Medion Akoya MD86xxx and Shuttle KD20.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(squash-picked commit 17511a7ea8 and commit dcc34574ef from master)

1 files changed, 0 insertions, 145 deletions

diff --git a/target/linux/oxnas/files/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/target/linux/oxnas/files/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
deleted file mode 100644
index aafb118144..0000000000
--- a/target/linux/oxnas/files/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/* Copyright OpenWrt.org (C) 2015.
- * Copyright Altera Corporation (C) 2014. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2,
- * as published by the Free Software Foundation.
- *
- * 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, see <http://www.gnu.org/licenses/>.
- *
- * Adopted from dwmac-socfpga.c
- * Based on code found in mach-oxnas.c
- */
-
-#include <linux/mfd/syscon.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_net.h>
-#include <linux/phy.h>
-#include <linux/regmap.h>
-#include <linux/reset.h>
-#include <linux/stmmac.h>
-
-#include <mach/hardware.h>
-
-#include "stmmac.h"
-#include "stmmac_platform.h"
-
-struct oxnas_gmac {
-	struct clk *clk;
-};
-
-static int oxnas_gmac_init(struct platform_device *pdev, void *priv)
-{
-	struct oxnas_gmac *bsp_priv = priv;
-	int ret = 0;
-	unsigned value;
-
-	ret = device_reset(&pdev->dev);
-	if (ret)
-		return ret;
-
-	if (IS_ERR(bsp_priv->clk))
-		return PTR_ERR(bsp_priv->clk);
-	clk_prepare_enable(bsp_priv->clk);
-
-	value = readl(SYS_CTRL_GMAC_CTRL);
-
-	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
-	value |= BIT(SYS_CTRL_GMAC_CKEN_GTX);
-	/* Use simple mux for 25/125 Mhz clock switching */
-	value |= BIT(SYS_CTRL_GMAC_SIMPLE_MUX);
-	/* set auto switch tx clock source */
-	value |= BIT(SYS_CTRL_GMAC_AUTO_TX_SOURCE);
-	/* enable tx & rx vardelay */
-	value |= BIT(SYS_CTRL_GMAC_CKEN_TX_OUT);
-	value |= BIT(SYS_CTRL_GMAC_CKEN_TXN_OUT);
-	value |= BIT(SYS_CTRL_GMAC_CKEN_TX_IN);
-	value |= BIT(SYS_CTRL_GMAC_CKEN_RX_OUT);
-	value |= BIT(SYS_CTRL_GMAC_CKEN_RXN_OUT);
-	value |= BIT(SYS_CTRL_GMAC_CKEN_RX_IN);
-	writel(value, SYS_CTRL_GMAC_CTRL);
-
-	/* set tx & rx vardelay */
-	value = 0;
-	value |= SYS_CTRL_GMAC_TX_VARDELAY(4);
-	value |= SYS_CTRL_GMAC_TXN_VARDELAY(2);
-	value |= SYS_CTRL_GMAC_RX_VARDELAY(10);
-	value |= SYS_CTRL_GMAC_RXN_VARDELAY(8);
-	writel(value, SYS_CTRL_GMAC_DELAY_CTRL);
-
-	return 0;
-}
-
-static void oxnas_gmac_exit(struct platform_device *pdev, void *priv)
-{
-	struct reset_control *rstc;
-
-	clk_disable_unprepare(priv);
-	devm_clk_put(&pdev->dev, priv);
-
-	rstc = reset_control_get(&pdev->dev, NULL);
-	if (!IS_ERR(rstc)) {
-		reset_control_assert(rstc);
-		reset_control_put(rstc);
-	}
-}
-
-static int oxnas_gmac_probe(struct platform_device *pdev)
-{
-	struct plat_stmmacenet_data *plat_dat;
-	struct stmmac_resources stmmac_res;
-	int			ret;
-	struct device		*dev = &pdev->dev;
-	struct oxnas_gmac	*bsp_priv;
-
-	bsp_priv = devm_kzalloc(dev, sizeof(*bsp_priv), GFP_KERNEL);
-	if (!bsp_priv)
-		return -ENOMEM;
-	bsp_priv->clk = devm_clk_get(dev, "gmac");
-	if (IS_ERR(bsp_priv->clk))
-		return PTR_ERR(bsp_priv->clk);
-
-	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
-	if (ret)
-		return ret;
-
-	plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
-	if (IS_ERR(plat_dat))
-		return PTR_ERR(plat_dat);
-
-	plat_dat->bsp_priv = bsp_priv;
-	plat_dat->init = oxnas_gmac_init;
-	plat_dat->exit = oxnas_gmac_exit;
-
-	ret = oxnas_gmac_init(pdev, bsp_priv);
-	if (ret)
-		return ret;
-
-	return stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
-}
-
-static const struct of_device_id oxnas_gmac_match[] = {
-	{ .compatible = "plxtech,nas782x-gmac" },
-	{ }
-};
-MODULE_DEVICE_TABLE(of, oxnas_gmac_match);
-
-static struct platform_driver oxnas_gmac_driver = {
-	.probe  = oxnas_gmac_probe,
-	.remove = stmmac_pltfr_remove,
-	.driver = {
-		.name		= "oxnas-gmac",
-		.pm		= &stmmac_pltfr_pm_ops,
-		.of_match_table = oxnas_gmac_match,
-	},
-};
-module_platform_driver(oxnas_gmac_driver);
-
-MODULE_LICENSE("GPL v2");