|
@@ -0,0 +1,130 @@
|
|
|
+/* 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-sti.c
|
|
|
+ */
|
|
|
+
|
|
|
+#include <linux/mfd/syscon.h>
|
|
|
+#include <linux/of.h>
|
|
|
+#include <linux/of_net.h>
|
|
|
+#include <linux/phy.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;
|
|
|
+ u32 reg_shift;
|
|
|
+ struct device *dev;
|
|
|
+ struct regmap *sys_mgr_base_addr;
|
|
|
+};
|
|
|
+
|
|
|
+static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)
|
|
|
+{
|
|
|
+ struct device_node *np = dev->of_node;
|
|
|
+ struct regmap *sys_mgr_base_addr;
|
|
|
+ u32 reg_offset, reg_shift;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ dwmac->interface = of_get_phy_mode(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, ®_offset);
|
|
|
+ if (ret) {
|
|
|
+ dev_info(dev, "Could not read reg_offset from sysmgr-syscon!\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift);
|
|
|
+ if (ret) {
|
|
|
+ dev_info(dev, "Could not read reg_shift from sysmgr-syscon!\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ dwmac->reg_offset = reg_offset;
|
|
|
+ dwmac->reg_shift = reg_shift;
|
|
|
+ dwmac->sys_mgr_base_addr = sys_mgr_base_addr;
|
|
|
+ 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 reg_shift = dwmac->reg_shift;
|
|
|
+ u32 ctrl, val;
|
|
|
+
|
|
|
+ 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 << reg_shift);
|
|
|
+ ctrl |= val << reg_shift;
|
|
|
+
|
|
|
+ regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void *socfpga_dwmac_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct device *dev = &pdev->dev;
|
|
|
+ int ret;
|
|
|
+ struct socfpga_dwmac *dwmac;
|
|
|
+
|
|
|
+ dwmac = devm_kzalloc(dev, sizeof(*dwmac), GFP_KERNEL);
|
|
|
+ if (!dwmac)
|
|
|
+ return ERR_PTR(-ENOMEM);
|
|
|
+
|
|
|
+ ret = socfpga_dwmac_parse_data(dwmac, dev);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "Unable to parse OF data\n");
|
|
|
+ return ERR_PTR(ret);
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = socfpga_dwmac_setup(dwmac);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(dev, "couldn't setup SoC glue (%d)\n", ret);
|
|
|
+ return ERR_PTR(ret);
|
|
|
+ }
|
|
|
+
|
|
|
+ return dwmac;
|
|
|
+}
|
|
|
+
|
|
|
+const struct stmmac_of_data socfpga_gmac_data = {
|
|
|
+ .setup = socfpga_dwmac_probe,
|
|
|
+};
|