diff options
Diffstat (limited to 'drivers/net/phy/mdio-ipq8064.c')
| -rw-r--r-- | drivers/net/phy/mdio-ipq8064.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/drivers/net/phy/mdio-ipq8064.c b/drivers/net/phy/mdio-ipq8064.c deleted file mode 100644 index 1bd18857e1c5..000000000000 --- a/drivers/net/phy/mdio-ipq8064.c +++ /dev/null @@ -1,166 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Qualcomm IPQ8064 MDIO interface driver - * - * Copyright (C) 2019 Christian Lamparter <chunkeey@gmail.com> - * Copyright (C) 2020 Ansuel Smith <ansuelsmth@gmail.com> - */ - -#include <linux/delay.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/regmap.h> -#include <linux/of_mdio.h> -#include <linux/phy.h> -#include <linux/platform_device.h> -#include <linux/mfd/syscon.h> - -/* MII address register definitions */ -#define MII_ADDR_REG_ADDR 0x10 -#define MII_BUSY BIT(0) -#define MII_WRITE BIT(1) -#define MII_CLKRANGE_60_100M (0 << 2) -#define MII_CLKRANGE_100_150M (1 << 2) -#define MII_CLKRANGE_20_35M (2 << 2) -#define MII_CLKRANGE_35_60M (3 << 2) -#define MII_CLKRANGE_150_250M (4 << 2) -#define MII_CLKRANGE_250_300M (5 << 2) -#define MII_CLKRANGE_MASK GENMASK(4, 2) -#define MII_REG_SHIFT 6 -#define MII_REG_MASK GENMASK(10, 6) -#define MII_ADDR_SHIFT 11 -#define MII_ADDR_MASK GENMASK(15, 11) - -#define MII_DATA_REG_ADDR 0x14 - -#define MII_MDIO_DELAY_USEC (1000) -#define MII_MDIO_RETRY_MSEC (10) - -struct ipq8064_mdio { - struct regmap *base; /* NSS_GMAC0_BASE */ -}; - -static int -ipq8064_mdio_wait_busy(struct ipq8064_mdio *priv) -{ - u32 busy; - - return regmap_read_poll_timeout(priv->base, MII_ADDR_REG_ADDR, busy, - !(busy & MII_BUSY), MII_MDIO_DELAY_USEC, - MII_MDIO_RETRY_MSEC * USEC_PER_MSEC); -} - -static int -ipq8064_mdio_read(struct mii_bus *bus, int phy_addr, int reg_offset) -{ - u32 miiaddr = MII_BUSY | MII_CLKRANGE_250_300M; - struct ipq8064_mdio *priv = bus->priv; - u32 ret_val; - int err; - - /* Reject clause 45 */ - if (reg_offset & MII_ADDR_C45) - return -EOPNOTSUPP; - - miiaddr |= ((phy_addr << MII_ADDR_SHIFT) & MII_ADDR_MASK) | - ((reg_offset << MII_REG_SHIFT) & MII_REG_MASK); - - regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr); - usleep_range(8, 10); - - err = ipq8064_mdio_wait_busy(priv); - if (err) - return err; - - regmap_read(priv->base, MII_DATA_REG_ADDR, &ret_val); - return (int)ret_val; -} - -static int -ipq8064_mdio_write(struct mii_bus *bus, int phy_addr, int reg_offset, u16 data) -{ - u32 miiaddr = MII_WRITE | MII_BUSY | MII_CLKRANGE_250_300M; - struct ipq8064_mdio *priv = bus->priv; - - /* Reject clause 45 */ - if (reg_offset & MII_ADDR_C45) - return -EOPNOTSUPP; - - regmap_write(priv->base, MII_DATA_REG_ADDR, data); - - miiaddr |= ((phy_addr << MII_ADDR_SHIFT) & MII_ADDR_MASK) | - ((reg_offset << MII_REG_SHIFT) & MII_REG_MASK); - - regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr); - usleep_range(8, 10); - - return ipq8064_mdio_wait_busy(priv); -} - -static int -ipq8064_mdio_probe(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - struct ipq8064_mdio *priv; - struct mii_bus *bus; - int ret; - - bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*priv)); - if (!bus) - return -ENOMEM; - - bus->name = "ipq8064_mdio_bus"; - bus->read = ipq8064_mdio_read; - bus->write = ipq8064_mdio_write; - snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev)); - bus->parent = &pdev->dev; - - priv = bus->priv; - priv->base = device_node_to_regmap(np); - if (IS_ERR(priv->base)) { - if (priv->base == ERR_PTR(-EPROBE_DEFER)) - return -EPROBE_DEFER; - - dev_err(&pdev->dev, "error getting device regmap, error=%pe\n", - priv->base); - return PTR_ERR(priv->base); - } - - ret = of_mdiobus_register(bus, np); - if (ret) - return ret; - - platform_set_drvdata(pdev, bus); - return 0; -} - -static int -ipq8064_mdio_remove(struct platform_device *pdev) -{ - struct mii_bus *bus = platform_get_drvdata(pdev); - - mdiobus_unregister(bus); - - return 0; -} - -static const struct of_device_id ipq8064_mdio_dt_ids[] = { - { .compatible = "qcom,ipq8064-mdio" }, - { } -}; -MODULE_DEVICE_TABLE(of, ipq8064_mdio_dt_ids); - -static struct platform_driver ipq8064_mdio_driver = { - .probe = ipq8064_mdio_probe, - .remove = ipq8064_mdio_remove, - .driver = { - .name = "ipq8064-mdio", - .of_match_table = ipq8064_mdio_dt_ids, - }, -}; - -module_platform_driver(ipq8064_mdio_driver); - -MODULE_DESCRIPTION("Qualcomm IPQ8064 MDIO interface driver"); -MODULE_AUTHOR("Christian Lamparter <chunkeey@gmail.com>"); -MODULE_AUTHOR("Ansuel Smith <ansuelsmth@gmail.com>"); -MODULE_LICENSE("GPL"); |