diff options
Diffstat (limited to 'drivers/net/phy/mdio-sun4i.c')
| -rw-r--r-- | drivers/net/phy/mdio-sun4i.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/drivers/net/phy/mdio-sun4i.c b/drivers/net/phy/mdio-sun4i.c deleted file mode 100644 index f798de3276dc..000000000000 --- a/drivers/net/phy/mdio-sun4i.c +++ /dev/null @@ -1,180 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Allwinner EMAC MDIO interface driver - * - * Copyright 2012-2013 Stefan Roese <sr@denx.de> - * Copyright 2013 Maxime Ripard <maxime.ripard@free-electrons.com> - * - * Based on the Linux driver provided by Allwinner: - * Copyright (C) 1997 Sten Wang - */ - -#include <linux/delay.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/of_address.h> -#include <linux/of_mdio.h> -#include <linux/phy.h> -#include <linux/platform_device.h> -#include <linux/regulator/consumer.h> - -#define EMAC_MAC_MCMD_REG (0x00) -#define EMAC_MAC_MADR_REG (0x04) -#define EMAC_MAC_MWTD_REG (0x08) -#define EMAC_MAC_MRDD_REG (0x0c) -#define EMAC_MAC_MIND_REG (0x10) -#define EMAC_MAC_SSRR_REG (0x14) - -#define MDIO_TIMEOUT (msecs_to_jiffies(100)) - -struct sun4i_mdio_data { - void __iomem *membase; - struct regulator *regulator; -}; - -static int sun4i_mdio_read(struct mii_bus *bus, int mii_id, int regnum) -{ - struct sun4i_mdio_data *data = bus->priv; - unsigned long timeout_jiffies; - int value; - - /* issue the phy address and reg */ - writel((mii_id << 8) | regnum, data->membase + EMAC_MAC_MADR_REG); - /* pull up the phy io line */ - writel(0x1, data->membase + EMAC_MAC_MCMD_REG); - - /* Wait read complete */ - timeout_jiffies = jiffies + MDIO_TIMEOUT; - while (readl(data->membase + EMAC_MAC_MIND_REG) & 0x1) { - if (time_is_before_jiffies(timeout_jiffies)) - return -ETIMEDOUT; - msleep(1); - } - - /* push down the phy io line */ - writel(0x0, data->membase + EMAC_MAC_MCMD_REG); - /* and read data */ - value = readl(data->membase + EMAC_MAC_MRDD_REG); - - return value; -} - -static int sun4i_mdio_write(struct mii_bus *bus, int mii_id, int regnum, - u16 value) -{ - struct sun4i_mdio_data *data = bus->priv; - unsigned long timeout_jiffies; - - /* issue the phy address and reg */ - writel((mii_id << 8) | regnum, data->membase + EMAC_MAC_MADR_REG); - /* pull up the phy io line */ - writel(0x1, data->membase + EMAC_MAC_MCMD_REG); - - /* Wait read complete */ - timeout_jiffies = jiffies + MDIO_TIMEOUT; - while (readl(data->membase + EMAC_MAC_MIND_REG) & 0x1) { - if (time_is_before_jiffies(timeout_jiffies)) - return -ETIMEDOUT; - msleep(1); - } - - /* push down the phy io line */ - writel(0x0, data->membase + EMAC_MAC_MCMD_REG); - /* and write data */ - writel(value, data->membase + EMAC_MAC_MWTD_REG); - - return 0; -} - -static int sun4i_mdio_probe(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - struct mii_bus *bus; - struct sun4i_mdio_data *data; - int ret; - - bus = mdiobus_alloc_size(sizeof(*data)); - if (!bus) - return -ENOMEM; - - bus->name = "sun4i_mii_bus"; - bus->read = &sun4i_mdio_read; - bus->write = &sun4i_mdio_write; - snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev)); - bus->parent = &pdev->dev; - - data = bus->priv; - data->membase = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(data->membase)) { - ret = PTR_ERR(data->membase); - goto err_out_free_mdiobus; - } - - data->regulator = devm_regulator_get(&pdev->dev, "phy"); - if (IS_ERR(data->regulator)) { - if (PTR_ERR(data->regulator) == -EPROBE_DEFER) { - ret = -EPROBE_DEFER; - goto err_out_free_mdiobus; - } - - dev_info(&pdev->dev, "no regulator found\n"); - data->regulator = NULL; - } else { - ret = regulator_enable(data->regulator); - if (ret) - goto err_out_free_mdiobus; - } - - ret = of_mdiobus_register(bus, np); - if (ret < 0) - goto err_out_disable_regulator; - - platform_set_drvdata(pdev, bus); - - return 0; - -err_out_disable_regulator: - if (data->regulator) - regulator_disable(data->regulator); -err_out_free_mdiobus: - mdiobus_free(bus); - return ret; -} - -static int sun4i_mdio_remove(struct platform_device *pdev) -{ - struct mii_bus *bus = platform_get_drvdata(pdev); - struct sun4i_mdio_data *data = bus->priv; - - mdiobus_unregister(bus); - if (data->regulator) - regulator_disable(data->regulator); - mdiobus_free(bus); - - return 0; -} - -static const struct of_device_id sun4i_mdio_dt_ids[] = { - { .compatible = "allwinner,sun4i-a10-mdio" }, - - /* Deprecated */ - { .compatible = "allwinner,sun4i-mdio" }, - { } -}; -MODULE_DEVICE_TABLE(of, sun4i_mdio_dt_ids); - -static struct platform_driver sun4i_mdio_driver = { - .probe = sun4i_mdio_probe, - .remove = sun4i_mdio_remove, - .driver = { - .name = "sun4i-mdio", - .of_match_table = sun4i_mdio_dt_ids, - }, -}; - -module_platform_driver(sun4i_mdio_driver); - -MODULE_DESCRIPTION("Allwinner EMAC MDIO interface driver"); -MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); -MODULE_LICENSE("GPL v2"); |