diff options
Diffstat (limited to 'drivers/net/phy/mdio-moxart.c')
| -rw-r--r-- | drivers/net/phy/mdio-moxart.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/drivers/net/phy/mdio-moxart.c b/drivers/net/phy/mdio-moxart.c deleted file mode 100644 index b72c6d185175..000000000000 --- a/drivers/net/phy/mdio-moxart.c +++ /dev/null @@ -1,187 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* MOXA ART Ethernet (RTL8201CP) MDIO interface driver - * - * Copyright (C) 2013 Jonas Jensen <jonas.jensen@gmail.com> - */ - -#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> - -#define REG_PHY_CTRL 0 -#define REG_PHY_WRITE_DATA 4 - -/* REG_PHY_CTRL */ -#define MIIWR BIT(27) /* init write sequence (auto cleared)*/ -#define MIIRD BIT(26) -#define REGAD_MASK 0x3e00000 -#define PHYAD_MASK 0x1f0000 -#define MIIRDATA_MASK 0xffff - -/* REG_PHY_WRITE_DATA */ -#define MIIWDATA_MASK 0xffff - -struct moxart_mdio_data { - void __iomem *base; -}; - -static int moxart_mdio_read(struct mii_bus *bus, int mii_id, int regnum) -{ - struct moxart_mdio_data *data = bus->priv; - u32 ctrl = 0; - unsigned int count = 5; - - dev_dbg(&bus->dev, "%s\n", __func__); - - ctrl |= MIIRD | ((mii_id << 16) & PHYAD_MASK) | - ((regnum << 21) & REGAD_MASK); - - writel(ctrl, data->base + REG_PHY_CTRL); - - do { - ctrl = readl(data->base + REG_PHY_CTRL); - - if (!(ctrl & MIIRD)) - return ctrl & MIIRDATA_MASK; - - mdelay(10); - count--; - } while (count > 0); - - dev_dbg(&bus->dev, "%s timed out\n", __func__); - - return -ETIMEDOUT; -} - -static int moxart_mdio_write(struct mii_bus *bus, int mii_id, - int regnum, u16 value) -{ - struct moxart_mdio_data *data = bus->priv; - u32 ctrl = 0; - unsigned int count = 5; - - dev_dbg(&bus->dev, "%s\n", __func__); - - ctrl |= MIIWR | ((mii_id << 16) & PHYAD_MASK) | - ((regnum << 21) & REGAD_MASK); - - value &= MIIWDATA_MASK; - - writel(value, data->base + REG_PHY_WRITE_DATA); - writel(ctrl, data->base + REG_PHY_CTRL); - - do { - ctrl = readl(data->base + REG_PHY_CTRL); - - if (!(ctrl & MIIWR)) - return 0; - - mdelay(10); - count--; - } while (count > 0); - - dev_dbg(&bus->dev, "%s timed out\n", __func__); - - return -ETIMEDOUT; -} - -static int moxart_mdio_reset(struct mii_bus *bus) -{ - int data, i; - - for (i = 0; i < PHY_MAX_ADDR; i++) { - data = moxart_mdio_read(bus, i, MII_BMCR); - if (data < 0) - continue; - - data |= BMCR_RESET; - if (moxart_mdio_write(bus, i, MII_BMCR, data) < 0) - continue; - } - - return 0; -} - -static int moxart_mdio_probe(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - struct mii_bus *bus; - struct moxart_mdio_data *data; - int ret, i; - - bus = mdiobus_alloc_size(sizeof(*data)); - if (!bus) - return -ENOMEM; - - bus->name = "MOXA ART Ethernet MII"; - bus->read = &moxart_mdio_read; - bus->write = &moxart_mdio_write; - bus->reset = &moxart_mdio_reset; - snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d-mii", pdev->name, pdev->id); - bus->parent = &pdev->dev; - - /* Setting PHY_IGNORE_INTERRUPT here even if it has no effect, - * of_mdiobus_register() sets these PHY_POLL. - * Ideally, the interrupt from MAC controller could be used to - * detect link state changes, not polling, i.e. if there was - * a way phy_driver could set PHY_HAS_INTERRUPT but have that - * interrupt handled in ethernet drivercode. - */ - for (i = 0; i < PHY_MAX_ADDR; i++) - bus->irq[i] = PHY_IGNORE_INTERRUPT; - - data = bus->priv; - data->base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(data->base)) { - ret = PTR_ERR(data->base); - goto err_out_free_mdiobus; - } - - ret = of_mdiobus_register(bus, np); - if (ret < 0) - goto err_out_free_mdiobus; - - platform_set_drvdata(pdev, bus); - - return 0; - -err_out_free_mdiobus: - mdiobus_free(bus); - return ret; -} - -static int moxart_mdio_remove(struct platform_device *pdev) -{ - struct mii_bus *bus = platform_get_drvdata(pdev); - - mdiobus_unregister(bus); - mdiobus_free(bus); - - return 0; -} - -static const struct of_device_id moxart_mdio_dt_ids[] = { - { .compatible = "moxa,moxart-mdio" }, - { } -}; -MODULE_DEVICE_TABLE(of, moxart_mdio_dt_ids); - -static struct platform_driver moxart_mdio_driver = { - .probe = moxart_mdio_probe, - .remove = moxart_mdio_remove, - .driver = { - .name = "moxart-mdio", - .of_match_table = moxart_mdio_dt_ids, - }, -}; - -module_platform_driver(moxart_mdio_driver); - -MODULE_DESCRIPTION("MOXA ART MDIO interface driver"); -MODULE_AUTHOR("Jonas Jensen <jonas.jensen@gmail.com>"); -MODULE_LICENSE("GPL v2"); |