+++ /dev/null
-/*
- * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
- *
- * 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/ioport.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/mii.h>
-#include <linux/platform_device.h>
-#include <linux/mdio-bitbang.h>
-#include <linux/of_mdio.h>
-#include <linux/of_platform.h>
-
-#include "fs_enet.h"
-
-struct bb_info {
- struct mdiobb_ctrl ctrl;
- __be32 __iomem *dir;
- __be32 __iomem *dat;
- u32 mdio_msk;
- u32 mdc_msk;
-};
-
-/* FIXME: If any other users of GPIO crop up, then these will have to
- * have some sort of global synchronization to avoid races with other
- * pins on the same port. The ideal solution would probably be to
- * bind the ports to a GPIO driver, and have this be a client of it.
- */
-static inline void bb_set(u32 __iomem *p, u32 m)
-{
- out_be32(p, in_be32(p) | m);
-}
-
-static inline void bb_clr(u32 __iomem *p, u32 m)
-{
- out_be32(p, in_be32(p) & ~m);
-}
-
-static inline int bb_read(u32 __iomem *p, u32 m)
-{
- return (in_be32(p) & m) != 0;
-}
-
-static inline void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
-{
- struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
-
- if (dir)
- bb_set(bitbang->dir, bitbang->mdio_msk);
- else
- bb_clr(bitbang->dir, bitbang->mdio_msk);
-
- /* Read back to flush the write. */
- in_be32(bitbang->dir);
-}
-
-static inline int mdio_read(struct mdiobb_ctrl *ctrl)
-{
- struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
- return bb_read(bitbang->dat, bitbang->mdio_msk);
-}
-
-static inline void mdio(struct mdiobb_ctrl *ctrl, int what)
-{
- struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
-
- if (what)
- bb_set(bitbang->dat, bitbang->mdio_msk);
- else
- bb_clr(bitbang->dat, bitbang->mdio_msk);
-
- /* Read back to flush the write. */
- in_be32(bitbang->dat);
-}
-
-static inline void mdc(struct mdiobb_ctrl *ctrl, int what)
-{
- struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
-
- if (what)
- bb_set(bitbang->dat, bitbang->mdc_msk);
- else
- bb_clr(bitbang->dat, bitbang->mdc_msk);
-
- /* Read back to flush the write. */
- in_be32(bitbang->dat);
-}
-
-static struct mdiobb_ops bb_ops = {
- .owner = THIS_MODULE,
- .set_mdc = mdc,
- .set_mdio_dir = mdio_dir,
- .set_mdio_data = mdio,
- .get_mdio_data = mdio_read,
-};
-
-static int __devinit fs_mii_bitbang_init(struct mii_bus *bus,
- struct device_node *np)
-{
- struct resource res;
- const u32 *data;
- int mdio_pin, mdc_pin, len;
- struct bb_info *bitbang = bus->priv;
-
- int ret = of_address_to_resource(np, 0, &res);
- if (ret)
- return ret;
-
- if (resource_size(&res) <= 13)
- return -ENODEV;
-
- /* This should really encode the pin number as well, but all
- * we get is an int, and the odds of multiple bitbang mdio buses
- * is low enough that it's not worth going too crazy.
- */
- snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
-
- data = of_get_property(np, "fsl,mdio-pin", &len);
- if (!data || len != 4)
- return -ENODEV;
- mdio_pin = *data;
-
- data = of_get_property(np, "fsl,mdc-pin", &len);
- if (!data || len != 4)
- return -ENODEV;
- mdc_pin = *data;
-
- bitbang->dir = ioremap(res.start, resource_size(&res));
- if (!bitbang->dir)
- return -ENOMEM;
-
- bitbang->dat = bitbang->dir + 4;
- bitbang->mdio_msk = 1 << (31 - mdio_pin);
- bitbang->mdc_msk = 1 << (31 - mdc_pin);
-
- return 0;
-}
-
-static int __devinit fs_enet_mdio_probe(struct platform_device *ofdev)
-{
- struct mii_bus *new_bus;
- struct bb_info *bitbang;
- int ret = -ENOMEM;
-
- bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
- if (!bitbang)
- goto out;
-
- bitbang->ctrl.ops = &bb_ops;
-
- new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
- if (!new_bus)
- goto out_free_priv;
-
- new_bus->name = "CPM2 Bitbanged MII",
-
- ret = fs_mii_bitbang_init(new_bus, ofdev->dev.of_node);
- if (ret)
- goto out_free_bus;
-
- new_bus->phy_mask = ~0;
- new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
- if (!new_bus->irq)
- goto out_unmap_regs;
-
- new_bus->parent = &ofdev->dev;
- dev_set_drvdata(&ofdev->dev, new_bus);
-
- ret = of_mdiobus_register(new_bus, ofdev->dev.of_node);
- if (ret)
- goto out_free_irqs;
-
- return 0;
-
-out_free_irqs:
- dev_set_drvdata(&ofdev->dev, NULL);
- kfree(new_bus->irq);
-out_unmap_regs:
- iounmap(bitbang->dir);
-out_free_bus:
- free_mdio_bitbang(new_bus);
-out_free_priv:
- kfree(bitbang);
-out:
- return ret;
-}
-
-static int fs_enet_mdio_remove(struct platform_device *ofdev)
-{
- struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
- struct bb_info *bitbang = bus->priv;
-
- mdiobus_unregister(bus);
- dev_set_drvdata(&ofdev->dev, NULL);
- kfree(bus->irq);
- free_mdio_bitbang(bus);
- iounmap(bitbang->dir);
- kfree(bitbang);
-
- return 0;
-}
-
-static struct of_device_id fs_enet_mdio_bb_match[] = {
- {
- .compatible = "fsl,cpm2-mdio-bitbang",
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, fs_enet_mdio_bb_match);
-
-static struct platform_driver fs_enet_bb_mdio_driver = {
- .driver = {
- .name = "fsl-bb-mdio",
- .owner = THIS_MODULE,
- .of_match_table = fs_enet_mdio_bb_match,
- },
- .probe = fs_enet_mdio_probe,
- .remove = fs_enet_mdio_remove,
-};
-
-static int fs_enet_mdio_bb_init(void)
-{
- return platform_driver_register(&fs_enet_bb_mdio_driver);
-}
-
-static void fs_enet_mdio_bb_exit(void)
-{
- platform_driver_unregister(&fs_enet_bb_mdio_driver);
-}
-
-module_init(fs_enet_mdio_bb_init);
-module_exit(fs_enet_mdio_bb_exit);
git.openpandora.org / pandora-kernel.git / blobdiff