diff options
Diffstat (limited to 'drivers/net/phy/mdio-gpio.c')
| -rw-r--r-- | drivers/net/phy/mdio-gpio.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c deleted file mode 100644 index 1b00235d7dc5..000000000000 --- a/drivers/net/phy/mdio-gpio.c +++ /dev/null @@ -1,217 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPIO based MDIO bitbang driver. - * Supports OpenFirmware. - * - * Copyright (c) 2008 CSE Semaphore Belgium. - * by Laurent Pinchart <laurentp@cse-semaphore.com> - * - * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt> - * - * Based on earlier work by - * - * Copyright (c) 2003 Intracom S.A. - * by Pantelis Antoniou <panto@intracom.gr> - * - * 2005 (c) MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/platform_data/mdio-gpio.h> -#include <linux/mdio-bitbang.h> -#include <linux/mdio-gpio.h> -#include <linux/gpio/consumer.h> -#include <linux/of_mdio.h> - -struct mdio_gpio_info { - struct mdiobb_ctrl ctrl; - struct gpio_desc *mdc, *mdio, *mdo; -}; - -static int mdio_gpio_get_data(struct device *dev, - struct mdio_gpio_info *bitbang) -{ - bitbang->mdc = devm_gpiod_get_index(dev, NULL, MDIO_GPIO_MDC, - GPIOD_OUT_LOW); - if (IS_ERR(bitbang->mdc)) - return PTR_ERR(bitbang->mdc); - - bitbang->mdio = devm_gpiod_get_index(dev, NULL, MDIO_GPIO_MDIO, - GPIOD_IN); - if (IS_ERR(bitbang->mdio)) - return PTR_ERR(bitbang->mdio); - - bitbang->mdo = devm_gpiod_get_index_optional(dev, NULL, MDIO_GPIO_MDO, - GPIOD_OUT_LOW); - return PTR_ERR_OR_ZERO(bitbang->mdo); -} - -static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir) -{ - struct mdio_gpio_info *bitbang = - container_of(ctrl, struct mdio_gpio_info, ctrl); - - if (bitbang->mdo) { - /* Separate output pin. Always set its value to high - * when changing direction. If direction is input, - * assume the pin serves as pull-up. If direction is - * output, the default value is high. - */ - gpiod_set_value_cansleep(bitbang->mdo, 1); - return; - } - - if (dir) - gpiod_direction_output(bitbang->mdio, 1); - else - gpiod_direction_input(bitbang->mdio); -} - -static int mdio_get(struct mdiobb_ctrl *ctrl) -{ - struct mdio_gpio_info *bitbang = - container_of(ctrl, struct mdio_gpio_info, ctrl); - - return gpiod_get_value_cansleep(bitbang->mdio); -} - -static void mdio_set(struct mdiobb_ctrl *ctrl, int what) -{ - struct mdio_gpio_info *bitbang = - container_of(ctrl, struct mdio_gpio_info, ctrl); - - if (bitbang->mdo) - gpiod_set_value_cansleep(bitbang->mdo, what); - else - gpiod_set_value_cansleep(bitbang->mdio, what); -} - -static void mdc_set(struct mdiobb_ctrl *ctrl, int what) -{ - struct mdio_gpio_info *bitbang = - container_of(ctrl, struct mdio_gpio_info, ctrl); - - gpiod_set_value_cansleep(bitbang->mdc, what); -} - -static const struct mdiobb_ops mdio_gpio_ops = { - .owner = THIS_MODULE, - .set_mdc = mdc_set, - .set_mdio_dir = mdio_dir, - .set_mdio_data = mdio_set, - .get_mdio_data = mdio_get, -}; - -static struct mii_bus *mdio_gpio_bus_init(struct device *dev, - struct mdio_gpio_info *bitbang, - int bus_id) -{ - struct mdio_gpio_platform_data *pdata = dev_get_platdata(dev); - struct mii_bus *new_bus; - - bitbang->ctrl.ops = &mdio_gpio_ops; - - new_bus = alloc_mdio_bitbang(&bitbang->ctrl); - if (!new_bus) - return NULL; - - new_bus->name = "GPIO Bitbanged MDIO"; - new_bus->parent = dev; - - if (bus_id != -1) - snprintf(new_bus->id, MII_BUS_ID_SIZE, "gpio-%x", bus_id); - else - strncpy(new_bus->id, "gpio", MII_BUS_ID_SIZE); - - if (pdata) { - new_bus->phy_mask = pdata->phy_mask; - new_bus->phy_ignore_ta_mask = pdata->phy_ignore_ta_mask; - } - - dev_set_drvdata(dev, new_bus); - - return new_bus; -} - -static void mdio_gpio_bus_deinit(struct device *dev) -{ - struct mii_bus *bus = dev_get_drvdata(dev); - - free_mdio_bitbang(bus); -} - -static void mdio_gpio_bus_destroy(struct device *dev) -{ - struct mii_bus *bus = dev_get_drvdata(dev); - - mdiobus_unregister(bus); - mdio_gpio_bus_deinit(dev); -} - -static int mdio_gpio_probe(struct platform_device *pdev) -{ - struct mdio_gpio_info *bitbang; - struct mii_bus *new_bus; - int ret, bus_id; - - bitbang = devm_kzalloc(&pdev->dev, sizeof(*bitbang), GFP_KERNEL); - if (!bitbang) - return -ENOMEM; - - ret = mdio_gpio_get_data(&pdev->dev, bitbang); - if (ret) - return ret; - - if (pdev->dev.of_node) { - bus_id = of_alias_get_id(pdev->dev.of_node, "mdio-gpio"); - if (bus_id < 0) { - dev_warn(&pdev->dev, "failed to get alias id\n"); - bus_id = 0; - } - } else { - bus_id = pdev->id; - } - - new_bus = mdio_gpio_bus_init(&pdev->dev, bitbang, bus_id); - if (!new_bus) - return -ENODEV; - - ret = of_mdiobus_register(new_bus, pdev->dev.of_node); - if (ret) - mdio_gpio_bus_deinit(&pdev->dev); - - return ret; -} - -static int mdio_gpio_remove(struct platform_device *pdev) -{ - mdio_gpio_bus_destroy(&pdev->dev); - - return 0; -} - -static const struct of_device_id mdio_gpio_of_match[] = { - { .compatible = "virtual,mdio-gpio", }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, mdio_gpio_of_match); - -static struct platform_driver mdio_gpio_driver = { - .probe = mdio_gpio_probe, - .remove = mdio_gpio_remove, - .driver = { - .name = "mdio-gpio", - .of_match_table = mdio_gpio_of_match, - }, -}; - -module_platform_driver(mdio_gpio_driver); - -MODULE_ALIAS("platform:mdio-gpio"); -MODULE_AUTHOR("Laurent Pinchart, Paulius Zaleckas"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("Generic driver for MDIO bus emulation using GPIO"); |