zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/phy/mdio-gpio.c b/ap/os/linux/linux-3.4.x/drivers/net/phy/mdio-gpio.c
new file mode 100644
index 0000000..7189adf
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/phy/mdio-gpio.c
@@ -0,0 +1,302 @@
+/*
+ * 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/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/mdio-gpio.h>
+
+#ifdef CONFIG_OF_GPIO
+#include <linux/of_gpio.h>
+#include <linux/of_mdio.h>
+#include <linux/of_platform.h>
+#endif
+
+struct mdio_gpio_info {
+ struct mdiobb_ctrl ctrl;
+ int mdc, mdio;
+};
+
+static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
+{
+ struct mdio_gpio_info *bitbang =
+ container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+ if (dir)
+ gpio_direction_output(bitbang->mdio, 1);
+ else
+ gpio_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 gpio_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);
+
+ gpio_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);
+
+ gpio_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 * __devinit 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;
+
+ bitbang = kzalloc(sizeof(*bitbang), GFP_KERNEL);
+ if (!bitbang)
+ goto out;
+
+ bitbang->ctrl.ops = &mdio_gpio_ops;
+ bitbang->ctrl.reset = pdata->reset;
+ bitbang->mdc = pdata->mdc;
+ bitbang->mdio = pdata->mdio;
+
+ new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
+ if (!new_bus)
+ goto out_free_bitbang;
+
+ new_bus->name = "GPIO Bitbanged MDIO",
+
+ new_bus->phy_mask = pdata->phy_mask;
+ new_bus->irq = pdata->irqs;
+ 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;
+
+ snprintf(new_bus->id, MII_BUS_ID_SIZE, "gpio-%x", bus_id);
+
+ if (gpio_request(bitbang->mdc, "mdc"))
+ goto out_free_bus;
+
+ if (gpio_request(bitbang->mdio, "mdio"))
+ goto out_free_mdc;
+
+ gpio_direction_output(bitbang->mdc, 0);
+
+ dev_set_drvdata(dev, new_bus);
+
+ return new_bus;
+
+out_free_mdc:
+ gpio_free(bitbang->mdc);
+out_free_bus:
+ free_mdio_bitbang(new_bus);
+out_free_bitbang:
+ kfree(bitbang);
+out:
+ return NULL;
+}
+
+static void mdio_gpio_bus_deinit(struct device *dev)
+{
+ struct mii_bus *bus = dev_get_drvdata(dev);
+ struct mdio_gpio_info *bitbang = bus->priv;
+
+ dev_set_drvdata(dev, NULL);
+ gpio_free(bitbang->mdio);
+ gpio_free(bitbang->mdc);
+ free_mdio_bitbang(bus);
+ kfree(bitbang);
+}
+
+static void __devexit 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 __devinit mdio_gpio_probe(struct platform_device *pdev)
+{
+ struct mdio_gpio_platform_data *pdata = pdev->dev.platform_data;
+ struct mii_bus *new_bus;
+ int ret;
+
+ if (!pdata)
+ return -ENODEV;
+
+ new_bus = mdio_gpio_bus_init(&pdev->dev, pdata, pdev->id);
+ if (!new_bus)
+ return -ENODEV;
+
+ ret = mdiobus_register(new_bus);
+ if (ret)
+ mdio_gpio_bus_deinit(&pdev->dev);
+
+ return ret;
+}
+
+static int __devexit mdio_gpio_remove(struct platform_device *pdev)
+{
+ mdio_gpio_bus_destroy(&pdev->dev);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF_GPIO
+
+static int __devinit mdio_ofgpio_probe(struct platform_device *ofdev)
+{
+ struct mdio_gpio_platform_data *pdata;
+ struct mii_bus *new_bus;
+ int ret;
+
+ pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ ret = of_get_gpio(ofdev->dev.of_node, 0);
+ if (ret < 0)
+ goto out_free;
+ pdata->mdc = ret;
+
+ ret = of_get_gpio(ofdev->dev.of_node, 1);
+ if (ret < 0)
+ goto out_free;
+ pdata->mdio = ret;
+
+ new_bus = mdio_gpio_bus_init(&ofdev->dev, pdata, pdata->mdc);
+ if (!new_bus)
+ goto out_free;
+
+ ret = of_mdiobus_register(new_bus, ofdev->dev.of_node);
+ if (ret)
+ mdio_gpio_bus_deinit(&ofdev->dev);
+
+ return ret;
+
+out_free:
+ kfree(pdata);
+ return -ENODEV;
+}
+
+static int __devexit mdio_ofgpio_remove(struct platform_device *ofdev)
+{
+ mdio_gpio_bus_destroy(&ofdev->dev);
+ kfree(ofdev->dev.platform_data);
+
+ return 0;
+}
+
+static struct of_device_id mdio_ofgpio_match[] = {
+ {
+ .compatible = "virtual,mdio-gpio",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mdio_ofgpio_match);
+
+static struct platform_driver mdio_ofgpio_driver = {
+ .driver = {
+ .name = "mdio-ofgpio",
+ .owner = THIS_MODULE,
+ .of_match_table = mdio_ofgpio_match,
+ },
+ .probe = mdio_ofgpio_probe,
+ .remove = __devexit_p(mdio_ofgpio_remove),
+};
+
+static inline int __init mdio_ofgpio_init(void)
+{
+ return platform_driver_register(&mdio_ofgpio_driver);
+}
+
+static inline void mdio_ofgpio_exit(void)
+{
+ platform_driver_unregister(&mdio_ofgpio_driver);
+}
+#else
+static inline int __init mdio_ofgpio_init(void) { return 0; }
+static inline void mdio_ofgpio_exit(void) { }
+#endif /* CONFIG_OF_GPIO */
+
+static struct platform_driver mdio_gpio_driver = {
+ .probe = mdio_gpio_probe,
+ .remove = __devexit_p(mdio_gpio_remove),
+ .driver = {
+ .name = "mdio-gpio",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init mdio_gpio_init(void)
+{
+ int ret;
+
+ ret = mdio_ofgpio_init();
+ if (ret)
+ return ret;
+
+ ret = platform_driver_register(&mdio_gpio_driver);
+ if (ret)
+ mdio_ofgpio_exit();
+
+ return ret;
+}
+module_init(mdio_gpio_init);
+
+static void __exit mdio_gpio_exit(void)
+{
+ platform_driver_unregister(&mdio_gpio_driver);
+ mdio_ofgpio_exit();
+}
+module_exit(mdio_gpio_exit);
+
+MODULE_ALIAS("platform:mdio-gpio");
+MODULE_AUTHOR("Laurent Pinchart, Paulius Zaleckas");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic driver for MDIO bus emulation using GPIO");