diff options
Diffstat (limited to 'drivers/net/phy/mdio-xgene.c')
| -rw-r--r-- | drivers/net/phy/mdio-xgene.c | 466 |
1 files changed, 0 insertions, 466 deletions
diff --git a/drivers/net/phy/mdio-xgene.c b/drivers/net/phy/mdio-xgene.c deleted file mode 100644 index 461207cdf5d6..000000000000 --- a/drivers/net/phy/mdio-xgene.c +++ /dev/null @@ -1,466 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* Applied Micro X-Gene SoC MDIO Driver - * - * Copyright (c) 2016, Applied Micro Circuits Corporation - * Author: Iyappan Subramanian <isubramanian@apm.com> - */ - -#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/mdio/mdio-xgene.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> - -static bool xgene_mdio_status; - -u32 xgene_mdio_rd_mac(struct xgene_mdio_pdata *pdata, u32 rd_addr) -{ - void __iomem *addr, *rd, *cmd, *cmd_done; - u32 done, rd_data = BUSY_MASK; - u8 wait = 10; - - 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; - - spin_lock(&pdata->mac_lock); - iowrite32(rd_addr, addr); - iowrite32(XGENE_ENET_RD_CMD, cmd); - - while (!(done = ioread32(cmd_done)) && wait--) - udelay(1); - - if (done) - rd_data = ioread32(rd); - - iowrite32(0, cmd); - spin_unlock(&pdata->mac_lock); - - return rd_data; -} -EXPORT_SYMBOL(xgene_mdio_rd_mac); - -void xgene_mdio_wr_mac(struct xgene_mdio_pdata *pdata, u32 wr_addr, u32 data) -{ - void __iomem *addr, *wr, *cmd, *cmd_done; - u8 wait = 10; - u32 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; - - spin_lock(&pdata->mac_lock); - iowrite32(wr_addr, addr); - iowrite32(data, wr); - iowrite32(XGENE_ENET_WR_CMD, cmd); - - while (!(done = ioread32(cmd_done)) && wait--) - udelay(1); - - if (!done) - pr_err("MCX mac write failed, addr: 0x%04x\n", wr_addr); - - iowrite32(0, cmd); - spin_unlock(&pdata->mac_lock); -} -EXPORT_SYMBOL(xgene_mdio_wr_mac); - -int xgene_mdio_rgmii_read(struct mii_bus *bus, int phy_id, int reg) -{ - struct xgene_mdio_pdata *pdata = (struct xgene_mdio_pdata *)bus->priv; - u32 data, done; - u8 wait = 10; - - data = SET_VAL(PHY_ADDR, phy_id) | SET_VAL(REG_ADDR, reg); - xgene_mdio_wr_mac(pdata, MII_MGMT_ADDRESS_ADDR, data); - xgene_mdio_wr_mac(pdata, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK); - do { - usleep_range(5, 10); - done = xgene_mdio_rd_mac(pdata, MII_MGMT_INDICATORS_ADDR); - } while ((done & BUSY_MASK) && wait--); - - if (done & BUSY_MASK) { - dev_err(&bus->dev, "MII_MGMT read failed\n"); - return -EBUSY; - } - - data = xgene_mdio_rd_mac(pdata, MII_MGMT_STATUS_ADDR); - xgene_mdio_wr_mac(pdata, MII_MGMT_COMMAND_ADDR, 0); - - return data; -} -EXPORT_SYMBOL(xgene_mdio_rgmii_read); - -int xgene_mdio_rgmii_write(struct mii_bus *bus, int phy_id, int reg, u16 data) -{ - struct xgene_mdio_pdata *pdata = (struct xgene_mdio_pdata *)bus->priv; - u32 val, done; - u8 wait = 10; - - val = SET_VAL(PHY_ADDR, phy_id) | SET_VAL(REG_ADDR, reg); - xgene_mdio_wr_mac(pdata, MII_MGMT_ADDRESS_ADDR, val); - - xgene_mdio_wr_mac(pdata, MII_MGMT_CONTROL_ADDR, data); - do { - usleep_range(5, 10); - done = xgene_mdio_rd_mac(pdata, MII_MGMT_INDICATORS_ADDR); - } while ((done & BUSY_MASK) && wait--); - - if (done & BUSY_MASK) { - dev_err(&bus->dev, "MII_MGMT write failed\n"); - return -EBUSY; - } - - return 0; -} -EXPORT_SYMBOL(xgene_mdio_rgmii_write); - -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_mdio_wr_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET); - xgene_mdio_wr_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) { - if (pdata->dev->of_node) - clk_disable_unprepare(pdata->clk); - return ret; - } - xgene_gmac_reset(pdata); - - return 0; -} - -static void xgene_enet_rd_mdio_csr(void __iomem *base_addr, - u32 offset, u32 *val) -{ - void __iomem *addr = base_addr + offset; - - *val = ioread32(addr); -} - -static void xgene_enet_wr_mdio_csr(void __iomem *base_addr, - u32 offset, u32 val) -{ - void __iomem *addr = base_addr + offset; - - iowrite32(val, addr); -} - -static int xgene_xfi_mdio_write(struct mii_bus *bus, int phy_id, - int reg, u16 data) -{ - void __iomem *addr = (void __iomem *)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(addr, MIIM_FIELD_ADDR, val); - - val = HSTLDCMD | SET_VAL(HSTMIIMCMD, MIIM_CMD_LEGACY_WRITE); - xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, val); - - do { - usleep_range(5, 10); - xgene_enet_rd_mdio_csr(addr, MIIM_INDICATOR_ADDR, &status); - } while ((status & BUSY_MASK) && timeout--); - - xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, 0); - - return 0; -} - -static int xgene_xfi_mdio_read(struct mii_bus *bus, int phy_id, int reg) -{ - void __iomem *addr = (void __iomem *)bus->priv; - u32 data, status, val; - int timeout = 100; - - val = SET_VAL(HSTPHYADX, phy_id) | SET_VAL(HSTREGADX, reg); - xgene_enet_wr_mdio_csr(addr, MIIM_FIELD_ADDR, val); - - val = HSTLDCMD | SET_VAL(HSTMIIMCMD, MIIM_CMD_LEGACY_READ); - xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, val); - - do { - usleep_range(5, 10); - xgene_enet_rd_mdio_csr(addr, MIIM_INDICATOR_ADDR, &status); - } while ((status & BUSY_MASK) && timeout--); - - if (status & BUSY_MASK) { - pr_err("XGENET_MII_MGMT write failed\n"); - return -EBUSY; - } - - xgene_enet_rd_mdio_csr(addr, MIIMRD_FIELD_ADDR, &data); - xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, 0); - - return data; -} - -struct phy_device *xgene_enet_phy_register(struct mii_bus *bus, int phy_addr) -{ - struct phy_device *phy_dev; - - phy_dev = get_phy_device(bus, phy_addr, false); - if (!phy_dev || IS_ERR(phy_dev)) - return NULL; - - if (phy_device_register(phy_dev)) - phy_device_free(phy_dev); - - return phy_dev; -} -EXPORT_SYMBOL(xgene_enet_phy_register); - -#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 = xgene_enet_phy_register(mdio, phy_addr); - adev->driver_data = phy_dev; - - return AE_OK; -} -#endif - -static const struct of_device_id xgene_mdio_of_match[] = { - { - .compatible = "apm,xgene-mdio-rgmii", - .data = (void *)XGENE_MDIO_RGMII - }, - { - .compatible = "apm,xgene-mdio-xfi", - .data = (void *)XGENE_MDIO_XFI - }, - {}, -}; -MODULE_DEVICE_TABLE(of, xgene_mdio_of_match); - -#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 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 xgene_mdio_pdata *pdata; - void __iomem *csr_base; - 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; - - csr_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(csr_base)) - return PTR_ERR(csr_base); - pdata->mac_csr_addr = csr_base; - pdata->mdio_csr_addr = csr_base + BLOCK_XG_MDIO_CSR_OFFSET; - pdata->diag_csr_addr = csr_base + BLOCK_DIAG_CSR_OFFSET; - - if (mdio_id == XGENE_MDIO_RGMII) - spin_lock_init(&pdata->mac_lock); - - 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 PTR_ERR(pdata->clk); - } - } - - ret = xgene_mdio_reset(pdata); - if (ret) - return ret; - - mdio_bus = mdiobus_alloc(); - if (!mdio_bus) { - ret = -ENOMEM; - goto out_clk; - } - - mdio_bus->name = "APM X-Gene MDIO bus"; - - if (mdio_id == XGENE_MDIO_RGMII) { - mdio_bus->read = xgene_mdio_rgmii_read; - mdio_bus->write = xgene_mdio_rgmii_write; - mdio_bus->priv = (void __force *)pdata; - snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s", - "xgene-mii-rgmii"); - } else { - mdio_bus->read = xgene_xfi_mdio_read; - mdio_bus->write = xgene_xfi_mdio_write; - mdio_bus->priv = (void __force *)pdata->mdio_csr_addr; - snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s", - "xgene-mii-xfi"); - } - - mdio_bus->parent = dev; - platform_set_drvdata(pdev, pdata); - - 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_mdiobus; - - acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_HANDLE(dev), 1, - acpi_register_phy, NULL, mdio_bus, NULL); -#endif - } - - if (ret) - goto out_mdiobus; - - pdata->mdio_bus = mdio_bus; - xgene_mdio_status = true; - - return 0; - -out_mdiobus: - mdiobus_free(mdio_bus); - -out_clk: - if (dev->of_node) - clk_disable_unprepare(pdata->clk); - - return ret; -} - -static int xgene_mdio_remove(struct platform_device *pdev) -{ - struct xgene_mdio_pdata *pdata = platform_get_drvdata(pdev); - struct mii_bus *mdio_bus = pdata->mdio_bus; - struct device *dev = &pdev->dev; - - mdiobus_unregister(mdio_bus); - mdiobus_free(mdio_bus); - - if (dev->of_node) - clk_disable_unprepare(pdata->clk); - - return 0; -} - -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@apm.com>"); -MODULE_LICENSE("GPL"); |