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>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47218 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 197 insertions, 101 deletions

diff --git a/target/linux/oxnas/files/arch/arm/mach-oxnas/mach-ox820.c b/target/linux/oxnas/files/arch/arm/mach-oxnas/mach-ox820.c
index 4b247b6b56..718bad7194 100644
--- a/target/linux/oxnas/files/arch/arm/mach-oxnas/mach-ox820.c
+++ b/target/linux/oxnas/files/arch/arm/mach-oxnas/mach-ox820.c
@@ -5,7 +5,6 @@
 #include <linux/clocksource.h>
 #include <linux/clk-provider.h>
 #include <linux/clk.h>
-#include <linux/stmmac.h>
 #include <linux/slab.h>
 #include <linux/gfp.h>
 #include <linux/reset.h>
@@ -57,102 +56,6 @@ void __init ox820_map_common_io(void)
 	iotable_init(ox820_io_desc, ARRAY_SIZE(ox820_io_desc));
 }
 
-struct plat_gmac_data {
-	struct plat_stmmacenet_data stmmac;
-	struct clk *clk;
-};
-
-void *ox820_gmac_setup(struct platform_device *pdev)
-{
-	struct plat_gmac_data *pdata = pdev->dev.platform_data;
-
-	pdata->clk = clk_get(&pdev->dev, "gmac");
-	return (void *) pdata->clk;
-};
-
-int ox820_gmac_init(struct platform_device *pdev, void *priv)
-{
-	int ret;
-	unsigned value;
-
-	ret = device_reset(&pdev->dev);
-	if (ret)
-		return ret;
-
-	if (IS_ERR(priv))
-		return PTR_ERR(priv);
-	clk_prepare_enable(priv);
-
-	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;
-}
-
-void ox820_gmac_exit(struct platform_device *pdev, void *priv)
-{
-	struct reset_control *rstc;
-
-	clk_disable_unprepare(priv);
-	clk_put(priv);
-
-	rstc = reset_control_get(&pdev->dev, NULL);
-	if (!IS_ERR(rstc)) {
-		reset_control_assert(rstc);
-		reset_control_put(rstc);
-	}
-}
-
-static int __init ox820_ether_init(void)
-{
-	struct device_node *node;
-	struct platform_device *pdev;
-	struct plat_gmac_data *pdata;
-
-	node = of_find_compatible_node(NULL, NULL, "plxtech,nas782x-gmac");
-	if (!node)
-		return -ENOENT;
-
-	pdev = of_find_device_by_node(node);
-	of_node_put(node);
-
-	if (!pdev)
-		return -EINVAL;
-
-	pdata = kzalloc(sizeof(struct plat_gmac_data), GFP_KERNEL);
-	if (!pdata)
-		return -ENOMEM;
-
-	pdata->stmmac.setup = ox820_gmac_setup;
-	pdata->stmmac.init = ox820_gmac_init;
-	pdata->stmmac.exit = ox820_gmac_exit;
-	pdev->dev.platform_data = pdata;
-
-	return 0;
-}
-
 static void __init ox820_dt_init(void)
 {
 	int ret;
@@ -165,10 +68,6 @@ static void __init ox820_dt_init(void)
 		BUG();
 	}
 
-	ret = ox820_ether_init();
-
-	if (ret)
-		pr_info("ox820_ether_init failed: %d\n", ret);
 }
 
 static void __init ox820_timer_init(void)
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");
diff --git a/target/linux/oxnas/patches-4.1/700-oxnas-dwmac.patch b/target/linux/oxnas/patches-4.1/700-oxnas-dwmac.patch
new file mode 100644
index 0000000000..dde3140a1f
--- /dev/null
+++ b/target/linux/oxnas/patches-4.1/700-oxnas-dwmac.patch
@@ -0,0 +1,25 @@
+--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
++++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
+@@ -20,7 +20,7 @@ config STMMAC_PLATFORM
+ 	---help---
+ 	  This selects the platform specific bus support for the stmmac driver.
+ 	  This is the driver used on several SoCs:
+-	  STi, Allwinner, Amlogic Meson, Altera SOCFPGA.
++	  STi, Allwinner, Amlogic Meson, Altera SOCFPGA and Oxnas.
+ 
+ 	  If you have a controller with this interface, say Y or M here.
+ 
+--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
++++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
+@@ -5,8 +5,9 @@ stmmac-objs:= stmmac_main.o stmmac_ethto
+ 	      mmc_core.o stmmac_hwtstamp.o stmmac_ptp.o $(stmmac-y)
+ 
+ obj-$(CONFIG_STMMAC_PLATFORM) += stmmac-platform.o
+-stmmac-platform-objs:= stmmac_platform.o dwmac-meson.o dwmac-sunxi.o	\
+-		       dwmac-sti.o dwmac-socfpga.o dwmac-rk.o
++stmmac-platform-objs:= stmmac_platform.o dwmac-meson.o dwmac-oxnas.o	\
++		       dwmac-sunxi.o dwmac-sti.o dwmac-socfpga.o	\
++		       dwmac-rk.o
+ 
+ obj-$(CONFIG_STMMAC_PCI) += stmmac-pci.o
+ stmmac-pci-objs:= stmmac_pci.o