oxnas: move gmac soc glue from mach to stmmac driver

Still a lot of kernel-version ifdef'ery, but imho that's easy to remove
once obsoleted and avoids duplicate code in the meantime.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 47218

1 files changed, 172 insertions, 0 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
new file mode 100644
index 0000000000..07f9f44497
--- /dev/null
+++ b/target/linux/oxnas/files/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
@@ -0,0 +1,172 @@
+/* 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 <linux/version.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);
+	}
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+static void *oxnas_gmac_probe(struct platform_device *pdev)
+{
+#else
+static int oxnas_gmac_probe(struct platform_device *pdev)
+{
+	struct plat_stmmacenet_data *plat_dat;
+	struct stmmac_resources stmmac_res;
+	int			ret;
+#endif
+	struct device		*dev = &pdev->dev;
+	struct oxnas_gmac	*bsp_priv;
+
+	bsp_priv = devm_kzalloc(dev, sizeof(*bsp_priv), GFP_KERNEL);
+	if (!bsp_priv)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+		return ERR_PTR(-ENOMEM);
+#else
+		return -ENOMEM;
+#endif
+	bsp_priv->clk = devm_clk_get(dev, "gmac");
+	if (IS_ERR(bsp_priv->clk))
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+		return bsp_priv->clk;
+#else
+		return PTR_ERR(bsp_priv->clk);
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+	return bsp_priv;
+#else
+	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);
+#endif
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+const struct stmmac_of_data oxnas_gmac_data = {
+	.has_gmac = 1,
+	.setup = oxnas_gmac_probe,
+	.init = oxnas_gmac_init,
+	.exit = oxnas_gmac_exit,
+};
+#else
+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);
+#endif
+
+MODULE_LICENSE("GPL v2");