/*
* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
*
- * Copyright (c) 2003 Intracom S.A.
+ * Copyright (c) 2003 Intracom S.A.
* by Pantelis Antoniou <panto@intracom.gr>
- *
- * 2005 (c) MontaVista Software, Inc.
+ *
+ * 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
+ * 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/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/ptrace.h>
-#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
#include <linux/init.h>
-#include <linux/delay.h>
+#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
#include <linux/mii.h>
-#include <linux/ethtool.h>
-#include <linux/bitops.h>
#include <linux/platform_device.h>
-
-#include <asm/pgtable.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
+#include <linux/mdio-bitbang.h>
+#include <linux/of_mdio.h>
+#include <linux/of_platform.h>
#include "fs_enet.h"
-static int bitbang_prep_bit(u8 **datp, u8 *mskp,
- struct fs_mii_bit *mii_bit)
-{
- void *dat;
- int adv;
- u8 msk;
-
- dat = (void*) mii_bit->offset;
-
- adv = mii_bit->bit >> 3;
- dat = (char *)dat + adv;
-
- msk = 1 << (7 - (mii_bit->bit & 7));
-
- *datp = dat;
- *mskp = msk;
-
- return 0;
-}
+struct bb_info {
+ struct mdiobb_ctrl ctrl;
+ __be32 __iomem *dir;
+ __be32 __iomem *dat;
+ u32 mdio_msk;
+ u32 mdc_msk;
+};
-static inline void bb_set(u8 *p, u8 m)
+/* 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_8(p, in_8(p) | m);
+ out_be32(p, in_be32(p) | m);
}
-static inline void bb_clr(u8 *p, u8 m)
+static inline void bb_clr(u32 __iomem *p, u32 m)
{
- out_8(p, in_8(p) & ~m);
+ out_be32(p, in_be32(p) & ~m);
}
-static inline int bb_read(u8 *p, u8 m)
+static inline int bb_read(u32 __iomem *p, u32 m)
{
- return (in_8(p) & m) != 0;
+ return (in_be32(p) & m) != 0;
}
-static inline void mdio_active(struct bb_info *bitbang)
+static inline void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
{
- bb_set(bitbang->mdio_dir, bitbang->mdio_dir_msk);
-}
+ struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
-static inline void mdio_tristate(struct bb_info *bitbang )
-{
- bb_clr(bitbang->mdio_dir, bitbang->mdio_dir_msk);
+ 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 bb_info *bitbang )
+static inline int mdio_read(struct mdiobb_ctrl *ctrl)
{
- return bb_read(bitbang->mdio_dat, bitbang->mdio_dat_msk);
+ struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
+ return bb_read(bitbang->dat, bitbang->mdio_msk);
}
-static inline void mdio(struct bb_info *bitbang , int what)
+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->mdio_dat, bitbang->mdio_dat_msk);
+ bb_set(bitbang->dat, bitbang->mdio_msk);
else
- bb_clr(bitbang->mdio_dat, bitbang->mdio_dat_msk);
+ bb_clr(bitbang->dat, bitbang->mdio_msk);
+
+ /* Read back to flush the write. */
+ in_be32(bitbang->dat);
}
-static inline void mdc(struct bb_info *bitbang , int what)
+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->mdc_dat, bitbang->mdc_msk);
+ bb_set(bitbang->dat, bitbang->mdc_msk);
else
- bb_clr(bitbang->mdc_dat, bitbang->mdc_msk);
-}
+ bb_clr(bitbang->dat, bitbang->mdc_msk);
-static inline void mii_delay(struct bb_info *bitbang )
-{
- udelay(bitbang->delay);
+ /* Read back to flush the write. */
+ in_be32(bitbang->dat);
}
-/* Utility to send the preamble, address, and register (common to read and write). */
-static void bitbang_pre(struct bb_info *bitbang , int read, u8 addr, u8 reg)
-{
- int j;
-
- /*
- * Send a 32 bit preamble ('1's) with an extra '1' bit for good measure.
- * The IEEE spec says this is a PHY optional requirement. The AMD
- * 79C874 requires one after power up and one after a MII communications
- * error. This means that we are doing more preambles than we need,
- * but it is safer and will be much more robust.
- */
-
- mdio_active(bitbang);
- mdio(bitbang, 1);
- for (j = 0; j < 32; j++) {
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- }
-
- /* send the start bit (01) and the read opcode (10) or write (10) */
- mdc(bitbang, 0);
- mdio(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, read);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, !read);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- /* send the PHY address */
- for (j = 0; j < 5; j++) {
- mdc(bitbang, 0);
- mdio(bitbang, (addr & 0x10) != 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- addr <<= 1;
- }
-
- /* send the register address */
- for (j = 0; j < 5; j++) {
- mdc(bitbang, 0);
- mdio(bitbang, (reg & 0x10) != 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- reg <<= 1;
- }
-}
+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 fs_enet_mii_bb_read(struct mii_bus *bus , int phy_id, int location)
+static int __devinit fs_mii_bitbang_init(struct mii_bus *bus,
+ struct device_node *np)
{
- u16 rdreg;
- int ret, j;
- u8 addr = phy_id & 0xff;
- u8 reg = location & 0xff;
- struct bb_info* bitbang = bus->priv;
-
- bitbang_pre(bitbang, 1, addr, reg);
-
- /* tri-state our MDIO I/O pin so we can read */
- mdc(bitbang, 0);
- mdio_tristate(bitbang);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- /* check the turnaround bit: the PHY should be driving it to zero */
- if (mdio_read(bitbang) != 0) {
- /* PHY didn't drive TA low */
- for (j = 0; j < 32; j++) {
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- }
- ret = -1;
- goto out;
- }
-
- mdc(bitbang, 0);
- mii_delay(bitbang);
-
- /* read 16 bits of register data, MSB first */
- rdreg = 0;
- for (j = 0; j < 16; j++) {
- mdc(bitbang, 1);
- mii_delay(bitbang);
- rdreg <<= 1;
- rdreg |= mdio_read(bitbang);
- mdc(bitbang, 0);
- mii_delay(bitbang);
- }
-
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- ret = rdreg;
-out:
- return ret;
-}
+ struct resource res;
+ const u32 *data;
+ int mdio_pin, mdc_pin, len;
+ struct bb_info *bitbang = bus->priv;
-static int fs_enet_mii_bb_write(struct mii_bus *bus, int phy_id, int location, u16 val)
-{
- int j;
- struct bb_info* bitbang = bus->priv;
-
- u8 addr = phy_id & 0xff;
- u8 reg = location & 0xff;
- u16 value = val & 0xffff;
-
- bitbang_pre(bitbang, 0, addr, reg);
-
- /* send the turnaround (10) */
- mdc(bitbang, 0);
- mdio(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- /* write 16 bits of register data, MSB first */
- for (j = 0; j < 16; j++) {
- mdc(bitbang, 0);
- mdio(bitbang, (value & 0x8000) != 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- value <<= 1;
- }
-
- /*
- * Tri-state the MDIO line.
- */
- mdio_tristate(bitbang);
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- return 0;
-}
+ int ret = of_address_to_resource(np, 0, &res);
+ if (ret)
+ return ret;
-static int fs_enet_mii_bb_reset(struct mii_bus *bus)
-{
- /*nothing here - dunno how to reset it*/
- return 0;
-}
+ if (res.end - res.start < 13)
+ return -ENODEV;
-static int fs_mii_bitbang_init(struct bb_info *bitbang, struct fs_mii_bb_platform_info* fmpi)
-{
- int r;
+ /* 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);
- bitbang->delay = fmpi->delay;
+ data = of_get_property(np, "fsl,mdio-pin", &len);
+ if (!data || len != 4)
+ return -ENODEV;
+ mdio_pin = *data;
- r = bitbang_prep_bit(&bitbang->mdio_dir,
- &bitbang->mdio_dir_msk,
- &fmpi->mdio_dir);
- if (r != 0)
- return r;
+ data = of_get_property(np, "fsl,mdc-pin", &len);
+ if (!data || len != 4)
+ return -ENODEV;
+ mdc_pin = *data;
- r = bitbang_prep_bit(&bitbang->mdio_dat,
- &bitbang->mdio_dat_msk,
- &fmpi->mdio_dat);
- if (r != 0)
- return r;
+ bitbang->dir = ioremap(res.start, res.end - res.start + 1);
+ if (!bitbang->dir)
+ return -ENOMEM;
- r = bitbang_prep_bit(&bitbang->mdc_dat,
- &bitbang->mdc_msk,
- &fmpi->mdc_dat);
- if (r != 0)
- return r;
+ 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 device *dev)
+static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct fs_mii_bb_platform_info *pdata;
struct mii_bus *new_bus;
struct bb_info *bitbang;
- int err = 0;
-
- if (NULL == dev)
- return -EINVAL;
-
- new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
-
- if (NULL == new_bus)
- return -ENOMEM;
+ int ret = -ENOMEM;
bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
+ if (!bitbang)
+ goto out;
- if (NULL == bitbang)
- return -ENOMEM;
-
- new_bus->name = "BB MII Bus",
- new_bus->read = &fs_enet_mii_bb_read,
- new_bus->write = &fs_enet_mii_bb_write,
- new_bus->reset = &fs_enet_mii_bb_reset,
- new_bus->id = pdev->id;
-
- new_bus->phy_mask = ~0x9;
- pdata = (struct fs_mii_bb_platform_info *)pdev->dev.platform_data;
-
- if (NULL == pdata) {
- printk(KERN_ERR "gfar mdio %d: Missing platform data!\n", pdev->id);
- return -ENODEV;
- }
+ bitbang->ctrl.ops = &bb_ops;
- /*set up workspace*/
- fs_mii_bitbang_init(bitbang, pdata);
+ new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
+ if (!new_bus)
+ goto out_free_priv;
- new_bus->priv = bitbang;
+ new_bus->name = "CPM2 Bitbanged MII",
- new_bus->irq = pdata->irq;
+ ret = fs_mii_bitbang_init(new_bus, ofdev->node);
+ if (ret)
+ goto out_free_bus;
- new_bus->dev = dev;
- dev_set_drvdata(dev, new_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;
- err = mdiobus_register(new_bus);
+ new_bus->parent = &ofdev->dev;
+ dev_set_drvdata(&ofdev->dev, new_bus);
- if (0 != err) {
- printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
- new_bus->name);
- goto bus_register_fail;
- }
+ ret = of_mdiobus_register(new_bus, ofdev->node);
+ if (ret)
+ goto out_free_irqs;
return 0;
-bus_register_fail:
+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);
- kfree(new_bus);
-
- return err;
+out:
+ return ret;
}
-
-static int fs_enet_mdio_remove(struct device *dev)
+static int fs_enet_mdio_remove(struct of_device *ofdev)
{
- struct mii_bus *bus = dev_get_drvdata(dev);
+ struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
+ struct bb_info *bitbang = bus->priv;
mdiobus_unregister(bus);
-
- dev_set_drvdata(dev, NULL);
-
- iounmap((void *) (&bus->priv));
- bus->priv = NULL;
- kfree(bus);
+ dev_set_drvdata(&ofdev->dev, NULL);
+ kfree(bus->irq);
+ free_mdio_bitbang(bus);
+ iounmap(bitbang->dir);
+ kfree(bitbang);
return 0;
}
-static struct device_driver fs_enet_bb_mdio_driver = {
+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 of_platform_driver fs_enet_bb_mdio_driver = {
.name = "fsl-bb-mdio",
- .bus = &platform_bus_type,
+ .match_table = fs_enet_mdio_bb_match,
.probe = fs_enet_mdio_probe,
.remove = fs_enet_mdio_remove,
};
-int fs_enet_mdio_bb_init(void)
+static int fs_enet_mdio_bb_init(void)
{
- return driver_register(&fs_enet_bb_mdio_driver);
+ return of_register_platform_driver(&fs_enet_bb_mdio_driver);
}
-void fs_enet_mdio_bb_exit(void)
+static void fs_enet_mdio_bb_exit(void)
{
- driver_unregister(&fs_enet_bb_mdio_driver);
+ of_unregister_platform_driver(&fs_enet_bb_mdio_driver);
}
+module_init(fs_enet_mdio_bb_init);
+module_exit(fs_enet_mdio_bb_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff