Merge tag 'socfpga_updates_for_3.15_v2' of git://git.rocketboards.org/linux-socfpga-next into next/drivers

Merge "SOCFPGA updates for 3.15 version 2" from Dinh Nguyen:

*Update SOCFPGA DTS to include ethernet, sd/mmc, and clock fixes
*Add stmmac ethernet glue layer
*Update socfpga_defconfig to include sd/mmc, and micrel_phy

* tag 'socfpga_updates_for_3.15_v2' of git://git.rocketboards.org/linux-socfpga-next:
  dts: socfpga: Add sysmgr node so the gmac can use to reference
  dts: socfpga: Add support for SD/MMC on the SOCFPGA platform
  dts: socfpga: Update clock entry to support multiple parents
  ARM: socfpga: Update socfpga_defconfig
  dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac.
  net: stmmac: Add SOCFPGA glue driver

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

2 files changed, 184 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index ecadece..73df8b6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_STMMAC_ETH) += stmmac.o
+stmmac-$(CONFIG_ARCH_SOCFPGA) += dwmac-socfpga.o
 stmmac-$(CONFIG_STMMAC_PLATFORM) += stmmac_platform.o
 stmmac-$(CONFIG_STMMAC_PCI) += stmmac_pci.o
 stmmac-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
new file mode 100644
index 0000000..c7f034b
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -0,0 +1,183 @@
+/*  Copyright (C) 2014 Altera Corporation
+ *
+ * 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.
+ *
+ * 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-sti.c
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_net.h>
+#include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/stmmac.h>
+
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0x0
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII 0x1
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK 0x00000003
+
+struct socfpga_dwmac {
+	int	interface;
+	u32	reg_offset;
+	struct	device *dev;
+	struct regmap *sys_mgr_base_addr;
+	struct	device_node *dwmac_np;
+};
+
+static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)
+{
+	struct device_node *np	= dev->of_node;
+	struct device_node *stmmac_np;
+	struct regmap *sys_mgr_base_addr;
+	u32 reg_offset;
+	int ret;
+
+	stmmac_np = of_get_next_available_child(np, NULL);
+	if (!stmmac_np) {
+		dev_info(dev, "No dwmac node found\n");
+		return -EINVAL;
+	}
+
+	if (!of_device_is_compatible(stmmac_np, "snps,dwmac")) {
+		dev_info(dev, "dwmac node isn't compatible with snps,dwmac\n");
+		return -EINVAL;
+	}
+
+	dwmac->interface = of_get_phy_mode(stmmac_np);
+	of_node_put(stmmac_np);
+
+	sys_mgr_base_addr = syscon_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
+	if (IS_ERR(sys_mgr_base_addr)) {
+		dev_info(dev, "No sysmgr-syscon node found\n");
+		return PTR_ERR(sys_mgr_base_addr);
+	}
+
+	ret = of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, &reg_offset);
+	if (ret) {
+		dev_info(dev, "Could not reg_offset into sysmgr-syscon!\n");
+		return -EINVAL;
+	}
+
+	dwmac->reg_offset = reg_offset;
+	dwmac->sys_mgr_base_addr = sys_mgr_base_addr;
+	dwmac->dwmac_np = stmmac_np;
+	dwmac->dev = dev;
+
+	return 0;
+}
+
+static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
+{
+	struct regmap *sys_mgr_base_addr = dwmac->sys_mgr_base_addr;
+	int phymode = dwmac->interface;
+	u32 reg_offset = dwmac->reg_offset;
+	u32 ctrl, val, shift = 0;
+
+	if (of_machine_is_compatible("altr,socfpga-vt"))
+		return 0;
+
+	switch (phymode) {
+	case PHY_INTERFACE_MODE_RGMII:
+		val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
+		break;
+	case PHY_INTERFACE_MODE_MII:
+	case PHY_INTERFACE_MODE_GMII:
+		val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
+		break;
+	default:
+		dev_err(dwmac->dev, "bad phy mode %d\n", phymode);
+		return -EINVAL;
+	}
+
+	regmap_read(sys_mgr_base_addr, reg_offset, &ctrl);
+	ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << shift);
+	ctrl |= val << shift;
+
+	regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
+	return 0;
+}
+
+static int socfpga_dwmac_probe(struct platform_device *pdev)
+{
+	struct device		*dev = &pdev->dev;
+	struct device_node	*node = dev->of_node;
+	int			ret = -ENOMEM;
+	struct socfpga_dwmac	*dwmac;
+
+	dwmac = devm_kzalloc(dev, sizeof(*dwmac), GFP_KERNEL);
+	if (!dwmac)
+		return -ENOMEM;
+
+	ret = socfpga_dwmac_parse_data(dwmac, dev);
+	if (ret) {
+		dev_err(dev, "Unable to parse OF data\n");
+		return ret;
+	}
+
+	ret = socfpga_dwmac_setup(dwmac);
+	if (ret) {
+		dev_err(dev, "couldn't setup SoC glue (%d)\n", ret);
+		return ret;
+	}
+
+	if (node) {
+		ret = of_platform_populate(node, NULL, NULL, dev);
+		if (ret) {
+			dev_err(dev, "failed to add dwmac core\n");
+			return ret;
+		}
+	} else {
+		dev_err(dev, "no device node, failed to add dwmac core\n");
+		return -ENODEV;
+	}
+
+	platform_set_drvdata(pdev, dwmac);
+
+	return 0;
+}
+
+static int socfpga_dwmac_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static const struct of_device_id socfpga_dwmac_match[] = {
+	{ .compatible = "altr,socfpga-stmmac" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, socfpga_dwmac_match);
+
+static struct platform_driver socfpga_dwmac_driver = {
+	.probe		= socfpga_dwmac_probe,
+	.remove		= socfpga_dwmac_remove,
+	.driver		= {
+		.name	= "socfpga-dwmac",
+		.of_match_table = of_match_ptr(socfpga_dwmac_match),
+	},
+};
+
+module_platform_driver(socfpga_dwmac_driver);
+
+MODULE_ALIAS("platform:socfpga-dwmac");
+MODULE_AUTHOR("Dinh Nguyen <dinguyen@altera.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Altera SOCFPGA DWMAC Glue Layer");