[PATCH v5 05/11] drivers: net: phy: xgene: Add MDIO driver
Iyappan Subramanian
isubramanian at apm.com
Thu Jul 7 16:02:53 PDT 2016
Currently, SGMII based 1G rely on the hardware registers for link state
and sometimes it's not reliable. To get most accurate link state, this
interface has to use the MDIO bus to poll the PHY.
In X-Gene SoC, MDIO bus is shared across RGMII and SGMII based 1G
interfaces, so adding this driver to manage MDIO bus. This driver
registers the mdio bus and registers the PHYs connected to it.
Signed-off-by: Iyappan Subramanian <isubramanian at apm.com>
Tested-by: Fushen Chen <fchen at apm.com>
Tested-by: Toan Le <toanle at apm.com>
Tested-by: Matthias Brugger <mbrugger at suse.com>
---
drivers/net/phy/Kconfig | 6 +
drivers/net/phy/Makefile | 1 +
drivers/net/phy/mdio-xgene.c | 487 +++++++++++++++++++++++++++++++++++++++++++
drivers/net/phy/mdio-xgene.h | 140 +++++++++++++
4 files changed, 634 insertions(+)
create mode 100644 drivers/net/phy/mdio-xgene.c
create mode 100644 drivers/net/phy/mdio-xgene.h
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index f968294..39a89c2 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -294,6 +294,12 @@ config INTEL_XWAY_PHY
PEF 7061, PEF 7071 and PEF 7072 or integrated into the Intel
SoCs xRX200, xRX300, xRX330, xRX350 and xRX550.
+config MDIO_XGENE
+ tristate "APM X-Gene SoC MDIO bus controller"
+ help
+ This module provides a driver for the MDIO busses found in the
+ APM X-Gene SoC's.
+
endif # PHYLIB
config MICREL_KS8995MA
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 7158274..6c8d3d5 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -47,3 +47,4 @@ obj-$(CONFIG_MDIO_BCM_UNIMAC) += mdio-bcm-unimac.o
obj-$(CONFIG_MICROCHIP_PHY) += microchip.o
obj-$(CONFIG_MDIO_BCM_IPROC) += mdio-bcm-iproc.o
obj-$(CONFIG_INTEL_XWAY_PHY) += intel-xway.o
+obj-$(CONFIG_MDIO_XGENE) += mdio-xgene.o
diff --git a/drivers/net/phy/mdio-xgene.c b/drivers/net/phy/mdio-xgene.c
new file mode 100644
index 0000000..4abb19d
--- /dev/null
+++ b/drivers/net/phy/mdio-xgene.c
@@ -0,0 +1,487 @@
+/* Applied Micro X-Gene SoC MDIO Driver
+ *
+ * Copyright (c) 2016, Applied Micro Circuits Corporation
+ * Author: Iyappan Subramanian <isubramanian at apm.com>
+ *
+ * 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/>.
+ */
+
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/efi.h>
+#include <linux/if_vlan.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/prefetch.h>
+#include <linux/phy.h>
+#include <net/ip.h>
+#include "mdio-xgene.h"
+
+static bool xgene_mdio_status;
+
+static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
+ void __iomem *cmd, void __iomem *cmd_done,
+ u32 rd_addr, u32 *rd_data)
+{
+ u32 done;
+ u8 wait = 10;
+
+ iowrite32(rd_addr, addr);
+ iowrite32(XGENE_ENET_RD_CMD, cmd);
+
+ /* wait for read command to complete */
+ while (!(done = ioread32(cmd_done)) && wait--)
+ udelay(1);
+
+ if (!done)
+ return false;
+
+ *rd_data = ioread32(rd);
+ iowrite32(0, cmd);
+
+ return true;
+}
+
+static void xgene_enet_rd_mcx_mac(struct xgene_mdio_pdata *pdata,
+ u32 rd_addr, u32 *rd_data)
+{
+ void __iomem *addr, *rd, *cmd, *cmd_done;
+
+ addr = pdata->mac_csr_addr + MAC_ADDR_REG_OFFSET;
+ rd = pdata->mac_csr_addr + MAC_READ_REG_OFFSET;
+ cmd = pdata->mac_csr_addr + MAC_COMMAND_REG_OFFSET;
+ cmd_done = pdata->mac_csr_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+ if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
+ dev_err(pdata->dev, "MCX mac read failed, addr: 0x%04x\n",
+ rd_addr);
+}
+
+static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
+ void __iomem *cmd, void __iomem *cmd_done,
+ u32 wr_addr, u32 wr_data)
+{
+ u32 done;
+ u8 wait = 10;
+
+ iowrite32(wr_addr, addr);
+ iowrite32(wr_data, wr);
+ iowrite32(XGENE_ENET_WR_CMD, cmd);
+
+ /* wait for write command to complete */
+ while (!(done = ioread32(cmd_done)) && wait--)
+ udelay(1);
+
+ if (!done)
+ return false;
+
+ iowrite32(0, cmd);
+
+ return true;
+}
+
+static void xgene_enet_wr_mcx_mac(struct xgene_mdio_pdata *pdata,
+ u32 wr_addr, u32 wr_data)
+{
+ void __iomem *addr, *wr, *cmd, *cmd_done;
+
+ addr = pdata->mac_csr_addr + MAC_ADDR_REG_OFFSET;
+ wr = pdata->mac_csr_addr + MAC_WRITE_REG_OFFSET;
+ cmd = pdata->mac_csr_addr + MAC_COMMAND_REG_OFFSET;
+ cmd_done = pdata->mac_csr_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+ if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
+ dev_err(pdata->dev, "MCX mac write failed, addr: 0x%04x\n",
+ wr_addr);
+}
+
+static int xgene_mdio_rgmii_read(struct mii_bus *bus, int phy_id, int reg)
+{
+ struct xgene_mdio_pdata *pdata = bus->priv;
+ u32 data, done;
+ u8 wait = 10;
+
+ data = SET_VAL(PHY_ADDR, phy_id) | SET_VAL(REG_ADDR, reg);
+ xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, data);
+ xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK);
+ do {
+ usleep_range(5, 10);
+ xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done);
+ } while ((done & BUSY_MASK) && wait--);
+
+ if (done & BUSY_MASK) {
+ dev_err(pdata->dev, "MII_MGMT read failed\n");
+ return -EBUSY;
+ }
+
+ xgene_enet_rd_mcx_mac(pdata, MII_MGMT_STATUS_ADDR, &data);
+ xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, 0);
+
+ return data;
+}
+
+static int xgene_mdio_rgmii_write(struct mii_bus *bus, int phy_id,
+ int reg, u16 data)
+{
+ struct xgene_mdio_pdata *pdata = bus->priv;
+ u32 val, done;
+ u8 wait = 10;
+
+ val = SET_VAL(PHY_ADDR, phy_id) | SET_VAL(REG_ADDR, reg);
+ xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, val);
+
+ xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONTROL_ADDR, data);
+ do {
+ usleep_range(5, 10);
+ xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done);
+ } while ((done & BUSY_MASK) && wait--);
+
+ if (done & BUSY_MASK) {
+ dev_err(pdata->dev, "MII_MGMT write failed\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static u32 xgene_menet_rd_diag_csr(struct xgene_mdio_pdata *pdata,
+ u32 offset)
+{
+ return ioread32(pdata->diag_csr_addr + offset);
+}
+
+static void xgene_menet_wr_diag_csr(struct xgene_mdio_pdata *pdata,
+ u32 offset, u32 val)
+{
+ iowrite32(val, pdata->diag_csr_addr + offset);
+}
+
+static int xgene_enet_ecc_init(struct xgene_mdio_pdata *pdata)
+{
+ u32 data;
+ u8 wait = 10;
+
+ xgene_menet_wr_diag_csr(pdata, MENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0x0);
+ do {
+ usleep_range(100, 110);
+ data = xgene_menet_rd_diag_csr(pdata, MENET_BLOCK_MEM_RDY_ADDR);
+ } while ((data != 0xffffffff) && wait--);
+
+ if (data != 0xffffffff) {
+ dev_err(pdata->dev, "Failed to release memory from shutdown\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void xgene_gmac_reset(struct xgene_mdio_pdata *pdata)
+{
+ xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET);
+ xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, 0);
+}
+
+static int xgene_mdio_reset(struct xgene_mdio_pdata *pdata)
+{
+ int ret;
+
+ if (pdata->dev->of_node) {
+ clk_prepare_enable(pdata->clk);
+ udelay(5);
+ clk_disable_unprepare(pdata->clk);
+ udelay(5);
+ clk_prepare_enable(pdata->clk);
+ udelay(5);
+ } else {
+#ifdef CONFIG_ACPI
+ acpi_evaluate_object(ACPI_HANDLE(pdata->dev),
+ "_RST", NULL, NULL);
+#endif
+ }
+
+ ret = xgene_enet_ecc_init(pdata);
+ if (ret)
+ return ret;
+ xgene_gmac_reset(pdata);
+
+ return 0;
+}
+
+static void xgene_enet_rd_mdio_csr(struct xgene_mdio_pdata *pdata,
+ u32 offset, u32 *val)
+{
+ void __iomem *addr = pdata->mdio_csr_addr + offset;
+
+ *val = ioread32(addr);
+}
+
+static void xgene_enet_wr_mdio_csr(struct xgene_mdio_pdata *pdata,
+ u32 offset, u32 val)
+{
+ void __iomem *addr = pdata->mdio_csr_addr + offset;
+
+ iowrite32(val, addr);
+}
+
+static int xgene_xfi_mdio_write(struct mii_bus *bus, int phy_id,
+ int reg, u16 data)
+{
+ struct xgene_mdio_pdata *pdata = bus->priv;
+ int timeout = 100;
+ u32 status, val;
+
+ val = SET_VAL(HSTPHYADX, phy_id) | SET_VAL(HSTREGADX, reg) |
+ SET_VAL(HSTMIIMWRDAT, data);
+ xgene_enet_wr_mdio_csr(pdata, MIIM_FIELD_ADDR, data);
+
+ val = HSTLDCMD | SET_VAL(HSTMIIMCMD, MIIM_CMD_LEGACY_WRITE);
+ xgene_enet_wr_mdio_csr(pdata, MIIM_COMMAND_ADDR, val);
+
+ do {
+ usleep_range(5, 10);
+ xgene_enet_rd_mdio_csr(pdata, MIIM_INDICATOR_ADDR, &status);
+ } while ((status & BUSY_MASK) && timeout--);
+
+ xgene_enet_wr_mdio_csr(pdata, MIIM_COMMAND_ADDR, 0);
+ return 0;
+}
+
+static int xgene_xfi_mdio_read(struct mii_bus *bus, int phy_id, int reg)
+{
+ struct xgene_mdio_pdata *pdata = bus->priv;
+ u32 data, status, val;
+ int timeout = 100;
+
+ val = SET_VAL(HSTPHYADX, phy_id) | SET_VAL(HSTREGADX, reg);
+ xgene_enet_wr_mdio_csr(pdata, MIIM_FIELD_ADDR, val);
+
+ val = HSTLDCMD | SET_VAL(HSTMIIMCMD, MIIM_CMD_LEGACY_READ);
+ xgene_enet_wr_mdio_csr(pdata, MIIM_COMMAND_ADDR, val);
+
+ do {
+ usleep_range(5, 10);
+ xgene_enet_rd_mdio_csr(pdata, MIIM_INDICATOR_ADDR, &status);
+ } while ((status & BUSY_MASK) && timeout--);
+
+ if (status & BUSY_MASK) {
+ dev_err(pdata->dev, "XGENET_MII_MGMT write failed\n");
+ return -EBUSY;
+ }
+ xgene_enet_rd_mdio_csr(pdata, MIIMRD_FIELD_ADDR, &data);
+ xgene_enet_wr_mdio_csr(pdata, MIIM_COMMAND_ADDR, 0);
+
+ return data;
+}
+
+#ifdef CONFIG_ACPI
+static acpi_status acpi_register_phy(acpi_handle handle, u32 lvl,
+ void *context, void **ret)
+{
+ struct mii_bus *mdio = context;
+ struct acpi_device *adev;
+ struct phy_device *phy_dev;
+ const union acpi_object *obj;
+ u32 phy_addr;
+
+ if (acpi_bus_get_device(handle, &adev))
+ return AE_OK;
+
+ if (acpi_dev_get_property(adev, "phy-channel", ACPI_TYPE_INTEGER, &obj))
+ return AE_OK;
+ phy_addr = obj->integer.value;
+
+ phy_dev = get_phy_device(mdio, phy_addr, false);
+ adev->driver_data = phy_dev;
+ if (!phy_dev || IS_ERR(phy_dev))
+ return AE_OK;
+
+ if (phy_device_register(phy_dev))
+ phy_device_free(phy_dev);
+
+ return AE_OK;
+}
+#endif
+
+bool xgene_mdio_probe_successful(void)
+{
+ return xgene_mdio_status;
+}
+EXPORT_SYMBOL(xgene_mdio_probe_successful);
+
+static int xgene_mdio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mii_bus *mdio_bus;
+ const struct of_device_id *of_id;
+ struct resource *res;
+ struct xgene_mdio_pdata *pdata;
+ void __iomem *csr_addr;
+ int mdio_id = 0, ret = 0;
+
+ of_id = of_match_device(xgene_mdio_of_match, &pdev->dev);
+ if (of_id) {
+ mdio_id = (enum xgene_mdio_id)of_id->data;
+ } else {
+#ifdef CONFIG_ACPI
+ const struct acpi_device_id *acpi_id;
+
+ acpi_id = acpi_match_device(xgene_mdio_acpi_match, &pdev->dev);
+ if (acpi_id)
+ mdio_id = (enum xgene_mdio_id)acpi_id->driver_data;
+#endif
+ }
+
+ if (!mdio_id)
+ return -ENODEV;
+
+ pdata = devm_kzalloc(dev, sizeof(struct xgene_mdio_pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+ pdata->mdio_id = mdio_id;
+ pdata->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "Resource mac_ind_csr not defined\n");
+ return -ENODEV;
+ }
+
+ csr_addr = devm_ioremap(dev, res->start, resource_size(res));
+ if (!csr_addr) {
+ dev_err(dev, "Unable to retrieve mac CSR region\n");
+ return -ENOMEM;
+ }
+ pdata->mac_csr_addr = csr_addr;
+ pdata->mdio_csr_addr = csr_addr + BLOCK_XG_MDIO_CSR_OFFSET;
+ pdata->diag_csr_addr = csr_addr + BLOCK_DIAG_CSR_OFFSET;
+
+ if (dev->of_node) {
+ pdata->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(pdata->clk)) {
+ dev_err(dev, "Unable to retrieve clk\n");
+ return -ENODEV;
+ }
+ }
+
+ ret = xgene_mdio_reset(pdata);
+ if (ret)
+ return ret;
+
+ mdio_bus = mdiobus_alloc();
+ if (!mdio_bus)
+ return -ENOMEM;
+
+ mdio_bus->name = "APM X-Gene MDIO bus";
+ snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-%d", "xgene-mii",
+ mdio_id);
+
+ if (mdio_id == XGENE_MDIO_RGMII) {
+ mdio_bus->read = xgene_mdio_rgmii_read;
+ mdio_bus->write = xgene_mdio_rgmii_write;
+ } else {
+ mdio_bus->read = xgene_xfi_mdio_read;
+ mdio_bus->write = xgene_xfi_mdio_write;
+ }
+
+ mdio_bus->priv = pdata;
+ mdio_bus->parent = dev;
+ platform_set_drvdata(pdev, mdio_bus);
+
+ if (dev->of_node) {
+ ret = of_mdiobus_register(mdio_bus, dev->of_node);
+ } else {
+#ifdef CONFIG_ACPI
+ /* Mask out all PHYs from auto probing. */
+ mdio_bus->phy_mask = ~0;
+ ret = mdiobus_register(mdio_bus);
+ if (ret)
+ goto out;
+
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_HANDLE(dev), 1,
+ acpi_register_phy, NULL, mdio_bus, NULL);
+#endif
+ }
+
+ if (ret)
+ goto out;
+
+ xgene_mdio_status = true;
+
+ return 0;
+out:
+ if (mdio_bus->state == MDIOBUS_REGISTERED)
+ mdiobus_unregister(mdio_bus);
+ mdiobus_free(mdio_bus);
+
+ return ret;
+}
+
+static int xgene_mdio_remove(struct platform_device *pdev)
+{
+ struct mii_bus *mdio_bus = platform_get_drvdata(pdev);
+ struct xgene_mdio_pdata *pdata = mdio_bus->priv;
+ struct device *dev = &pdev->dev;
+
+ mdiobus_unregister(mdio_bus);
+ mdiobus_free(mdio_bus);
+
+ if (dev->of_node) {
+ if (IS_ERR(pdata->clk))
+ clk_disable_unprepare(pdata->clk);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id xgene_mdio_of_match[] = {
+ {
+ .compatible = "apm,xgene-mdio-rgmii",
+ .data = (void *)XGENE_MDIO_RGMII
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, xgene_mdio_of_match);
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_mdio_acpi_match[] = {
+ { "APMC0D65", XGENE_MDIO_RGMII },
+ { "APMC0D66", XGENE_MDIO_XFI },
+ { }
+};
+
+MODULE_DEVICE_TABLE(acpi, xgene_mdio_acpi_match);
+#endif
+
+static struct platform_driver xgene_mdio_driver = {
+ .driver = {
+ .name = "xgene-mdio",
+ .of_match_table = of_match_ptr(xgene_mdio_of_match),
+ .acpi_match_table = ACPI_PTR(xgene_mdio_acpi_match),
+ },
+ .probe = xgene_mdio_probe,
+ .remove = xgene_mdio_remove,
+};
+
+module_platform_driver(xgene_mdio_driver);
+
+MODULE_DESCRIPTION("APM X-Gene SoC MDIO driver");
+MODULE_AUTHOR("Iyappan Subramanian <isubramanian at apm.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/phy/mdio-xgene.h b/drivers/net/phy/mdio-xgene.h
new file mode 100644
index 0000000..08b4323
--- /dev/null
+++ b/drivers/net/phy/mdio-xgene.h
@@ -0,0 +1,140 @@
+/* Applied Micro X-Gene SoC MDIO Driver
+ *
+ * Copyright (c) 2016, Applied Micro Circuits Corporation
+ * Author: Iyappan Subramanian <isubramanian at apm.com>
+ *
+ * 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/>.
+ */
+
+#ifndef __MDIO_XGENE_H__
+#define __MDIO_XGENE_H__
+
+#define BLOCK_XG_MDIO_CSR_OFFSET 0x5000
+#define BLOCK_DIAG_CSR_OFFSET 0xd000
+#define XGENET_CONFIG_REG_ADDR 0x20
+
+#define MAC_ADDR_REG_OFFSET 0x00
+#define MAC_COMMAND_REG_OFFSET 0x04
+#define MAC_WRITE_REG_OFFSET 0x08
+#define MAC_READ_REG_OFFSET 0x0c
+#define MAC_COMMAND_DONE_REG_OFFSET 0x10
+
+#define CLKEN_OFFSET 0x08
+#define SRST_OFFSET 0x00
+
+#define MENET_CFG_MEM_RAM_SHUTDOWN_ADDR 0x70
+#define MENET_BLOCK_MEM_RDY_ADDR 0x74
+
+#define MAC_CONFIG_1_ADDR 0x00
+#define MII_MGMT_COMMAND_ADDR 0x24
+#define MII_MGMT_ADDRESS_ADDR 0x28
+#define MII_MGMT_CONTROL_ADDR 0x2c
+#define MII_MGMT_STATUS_ADDR 0x30
+#define MII_MGMT_INDICATORS_ADDR 0x34
+#define SOFT_RESET BIT(31)
+
+#define MII_MGMT_CONFIG_ADDR 0x20
+#define MII_MGMT_COMMAND_ADDR 0x24
+#define MII_MGMT_ADDRESS_ADDR 0x28
+#define MII_MGMT_CONTROL_ADDR 0x2c
+#define MII_MGMT_STATUS_ADDR 0x30
+#define MII_MGMT_INDICATORS_ADDR 0x34
+
+#define MIIM_COMMAND_ADDR 0x20
+#define MIIM_FIELD_ADDR 0x24
+#define MIIM_CONFIGURATION_ADDR 0x28
+#define MIIM_LINKFAILVECTOR_ADDR 0x2c
+#define MIIM_INDICATOR_ADDR 0x30
+#define MIIMRD_FIELD_ADDR 0x34
+
+#define MDIO_CSR_OFFSET 0x5000
+
+#define REG_ADDR_POS 0
+#define REG_ADDR_LEN 5
+#define PHY_ADDR_POS 8
+#define PHY_ADDR_LEN 5
+
+#define HSTMIIMWRDAT_POS 0
+#define HSTMIIMWRDAT_LEN 16
+#define HSTPHYADX_POS 23
+#define HSTPHYADX_LEN 5
+#define HSTREGADX_POS 18
+#define HSTREGADX_LEN 5
+#define HSTLDCMD BIT(3)
+#define HSTMIIMCMD_POS 0
+#define HSTMIIMCMD_LEN 3
+
+#define BUSY_MASK BIT(0)
+#define READ_CYCLE_MASK BIT(0)
+
+enum xgene_enet_cmd {
+ XGENE_ENET_WR_CMD = BIT(31),
+ XGENE_ENET_RD_CMD = BIT(30)
+};
+
+enum {
+ MIIM_CMD_IDLE,
+ MIIM_CMD_LEGACY_WRITE,
+ MIIM_CMD_LEGACY_READ,
+};
+
+enum xgene_mdio_id {
+ XGENE_MDIO_RGMII = 1,
+ XGENE_MDIO_XFI
+};
+
+struct xgene_mdio_pdata {
+ struct clk *clk;
+ struct device *dev;
+ void __iomem *mac_csr_addr;
+ void __iomem *diag_csr_addr;
+ void __iomem *mdio_csr_addr;
+ int mdio_id;
+};
+
+/* Set the specified value into a bit-field defined by its starting position
+ * and length within a single u64.
+ */
+static inline u64 xgene_enet_set_field_value(int pos, int len, u64 val)
+{
+ return (val & ((1ULL << len) - 1)) << pos;
+}
+
+#define SET_VAL(field, val) \
+ xgene_enet_set_field_value(field ## _POS, field ## _LEN, val)
+
+#define SET_BIT(field) \
+ xgene_enet_set_field_value(field ## _POS, 1, 1)
+
+/* Get the value from a bit-field defined by its starting position
+ * and length within the specified u64.
+ */
+static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
+{
+ return (src >> pos) & ((1ULL << len) - 1);
+}
+
+#define GET_VAL(field, src) \
+ xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
+
+#define GET_BIT(field, src) \
+ xgene_enet_get_field_value(field ## _POS, 1, src)
+
+static const struct of_device_id xgene_mdio_of_match[];
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgene_mdio_acpi_match[];
+#endif
+bool xgene_mdio_probe_successful(void);
+
+#endif /* __MDIO_XGENE_H__ */
--
1.9.1
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