diff options
Diffstat (limited to 'drivers/net/phy/mdio-gpio.c')
| -rw-r--r-- | drivers/net/phy/mdio-gpio.c | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c deleted file mode 100644 index 7faa79b254ef..000000000000 --- a/drivers/net/phy/mdio-gpio.c +++ /dev/null @@ -1,280 +0,0 @@ -/* - * 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> - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/gpio.h> -#include <linux/platform_data/mdio-gpio.h> - -#include <linux/of_gpio.h> -#include <linux/of_mdio.h> - -struct mdio_gpio_info { - struct mdiobb_ctrl ctrl; - struct gpio_desc *mdc, *mdio, *mdo; -}; - -static void *mdio_gpio_of_get_data(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - struct mdio_gpio_platform_data *pdata; - enum of_gpio_flags flags; - int ret; - - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) - return NULL; - - ret = of_get_gpio_flags(np, 0, &flags); - if (ret < 0) - return NULL; - - pdata->mdc = ret; - pdata->mdc_active_low = flags & OF_GPIO_ACTIVE_LOW; - - ret = of_get_gpio_flags(np, 1, &flags); - if (ret < 0) - return NULL; - pdata->mdio = ret; - pdata->mdio_active_low = flags & OF_GPIO_ACTIVE_LOW; - - ret = of_get_gpio_flags(np, 2, &flags); - if (ret > 0) { - pdata->mdo = ret; - pdata->mdo_active_low = flags & OF_GPIO_ACTIVE_LOW; - } - - return pdata; -} - -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(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(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(bitbang->mdo, what); - else - gpiod_set_value(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(bitbang->mdc, what); -} - -static 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_platform_data *pdata, - int bus_id) -{ - struct mii_bus *new_bus; - struct mdio_gpio_info *bitbang; - int i; - int mdc, mdio, mdo; - unsigned long mdc_flags = GPIOF_OUT_INIT_LOW; - unsigned long mdio_flags = GPIOF_DIR_IN; - unsigned long mdo_flags = GPIOF_OUT_INIT_HIGH; - - bitbang = devm_kzalloc(dev, sizeof(*bitbang), GFP_KERNEL); - if (!bitbang) - goto out; - - bitbang->ctrl.ops = &mdio_gpio_ops; - bitbang->ctrl.reset = pdata->reset; - mdc = pdata->mdc; - bitbang->mdc = gpio_to_desc(mdc); - if (pdata->mdc_active_low) - mdc_flags = GPIOF_OUT_INIT_HIGH | GPIOF_ACTIVE_LOW; - mdio = pdata->mdio; - bitbang->mdio = gpio_to_desc(mdio); - if (pdata->mdio_active_low) - mdio_flags |= GPIOF_ACTIVE_LOW; - mdo = pdata->mdo; - if (mdo) { - bitbang->mdo = gpio_to_desc(mdo); - if (pdata->mdo_active_low) - mdo_flags = GPIOF_OUT_INIT_LOW | GPIOF_ACTIVE_LOW; - } - - new_bus = alloc_mdio_bitbang(&bitbang->ctrl); - if (!new_bus) - goto out; - - new_bus->name = "GPIO Bitbanged MDIO", - - new_bus->phy_mask = pdata->phy_mask; - new_bus->phy_ignore_ta_mask = pdata->phy_ignore_ta_mask; - memcpy(new_bus->irq, pdata->irqs, sizeof(new_bus->irq)); - new_bus->parent = dev; - - if (new_bus->phy_mask == ~0) - goto out_free_bus; - - for (i = 0; i < PHY_MAX_ADDR; i++) - if (!new_bus->irq[i]) - new_bus->irq[i] = PHY_POLL; - - 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 (devm_gpio_request_one(dev, mdc, mdc_flags, "mdc")) - goto out_free_bus; - - if (devm_gpio_request_one(dev, mdio, mdio_flags, "mdio")) - goto out_free_bus; - - if (mdo && devm_gpio_request_one(dev, mdo, mdo_flags, "mdo")) - goto out_free_bus; - - dev_set_drvdata(dev, new_bus); - - return new_bus; - -out_free_bus: - free_mdio_bitbang(new_bus); -out: - return NULL; -} - -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_platform_data *pdata; - struct mii_bus *new_bus; - int ret, bus_id; - - if (pdev->dev.of_node) { - pdata = mdio_gpio_of_get_data(pdev); - 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 { - pdata = dev_get_platdata(&pdev->dev); - bus_id = pdev->id; - } - - if (!pdata) - return -ENODEV; - - new_bus = mdio_gpio_bus_init(&pdev->dev, pdata, bus_id); - if (!new_bus) - return -ENODEV; - - if (pdev->dev.of_node) - ret = of_mdiobus_register(new_bus, pdev->dev.of_node); - else - ret = mdiobus_register(new_bus); - - 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"); -MODULE_DESCRIPTION("Generic driver for MDIO bus emulation using GPIO"); |