drivers/net/fs_enet/mii-fec.c - kernel/msm-4.9 - Gitiles

 /*
  * 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/types.h>
 #include <linux/kernel.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/init.h>
 #include <linux/delay.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>

 #ifdef CONFIG_PPC_CPM_NEW_BINDING
 #include <linux/of_platform.h>
 #endif

 #include "fs_enet.h"
 #include "fec.h"

 /* Make MII read/write commands for the FEC.
 */
 #define mk_mii_read(REG)	(0x60020000 | ((REG & 0x1f) << 18))
 #define mk_mii_write(REG, VAL)	(0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
 #define mk_mii_end		0

 #define FEC_MII_LOOPS	10000

 #ifndef CONFIG_PPC_CPM_NEW_BINDING
 static int match_has_phy (struct device *dev, void* data)
 {
 	struct platform_device* pdev = container_of(dev, struct platform_device, dev);
 	struct fs_platform_info* fpi;
 	if(strcmp(pdev->name, (char*)data))
 	{
 	    return 0;
 	}

 	fpi = pdev->dev.platform_data;
 	if((fpi)&&(fpi->has_phy))
 		return 1;
 	return 0;
 }

 static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi)
 {
 	struct resource *r;
 	fec_t __iomem *fecp;
 	char* name = "fsl-cpm-fec";

 	/* we need fec in order to be useful */
 	struct platform_device *fec_pdev =
 		container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy),
 				struct platform_device, dev);

 	if(fec_pdev == NULL) {
 		printk(KERN_ERR"Unable to find PHY for %s", name);
 		return -ENODEV;
 	}

 	r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs");

 	fec->fecp = fecp = ioremap(r->start,sizeof(fec_t));
 	fec->mii_speed = fmpi->mii_speed;

 	setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE);	/* MII enable */
 	setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
 	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
 	out_be32(&fecp->fec_mii_speed, fec->mii_speed);

 	return 0;
 }
 #endif

 static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
 {
 	struct fec_info* fec = bus->priv;
 	fec_t __iomem *fecp = fec->fecp;
 	int i, ret = -1;

 	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
 		BUG();

 	/* Add PHY address to register command.  */
 	out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location));

 	for (i = 0; i < FEC_MII_LOOPS; i++)
 		if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
 			break;

 	if (i < FEC_MII_LOOPS) {
 		out_be32(&fecp->fec_ievent, FEC_ENET_MII);
 		ret = in_be32(&fecp->fec_mii_data) & 0xffff;
 	}

 	return ret;
 }

 static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
 {
 	struct fec_info* fec = bus->priv;
 	fec_t __iomem *fecp = fec->fecp;
 	int i;

 	/* this must never happen */
 	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
 		BUG();

 	/* Add PHY address to register command.  */
 	out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val));

 	for (i = 0; i < FEC_MII_LOOPS; i++)
 		if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
 			break;

 	if (i < FEC_MII_LOOPS)
 		out_be32(&fecp->fec_ievent, FEC_ENET_MII);

 	return 0;

 }

 static int fs_enet_fec_mii_reset(struct mii_bus *bus)
 {
 	/* nothing here - for now */
 	return 0;
 }

 #ifdef CONFIG_PPC_CPM_NEW_BINDING
 static void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
 {
 	const u32 *data;
 	int len, id, irq;

 	data = of_get_property(np, "reg", &len);
 	if (!data || len != 4)
 		return;

 	id = *data;
 	bus->phy_mask &= ~(1 << id);

 	irq = of_irq_to_resource(np, 0, NULL);
 	if (irq != NO_IRQ)
 		bus->irq[id] = irq;
 }

 static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
                                         const struct of_device_id *match)
 {
 	struct device_node *np = NULL;
 	struct resource res;
 	struct mii_bus *new_bus;
 	struct fec_info *fec;
 	int ret = -ENOMEM, i;

 	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
 	if (!new_bus)
 		goto out;

 	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
 	if (!fec)
 		goto out_mii;

 	new_bus->priv = fec;
 	new_bus->name = "FEC MII Bus";
 	new_bus->read = &fs_enet_fec_mii_read;
 	new_bus->write = &fs_enet_fec_mii_write;
 	new_bus->reset = &fs_enet_fec_mii_reset;

 	ret = of_address_to_resource(ofdev->node, 0, &res);
 	if (ret)
 		goto out_res;

 	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start);

 	fec->fecp = ioremap(res.start, res.end - res.start + 1);
 	if (!fec->fecp)
 		goto out_fec;

 	fec->mii_speed = ((ppc_proc_freq + 4999999) / 5000000) << 1;

 	setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE);
 	setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX |
 	                                  FEC_ECNTRL_ETHER_EN);
 	out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII);
 	out_be32(&fec->fecp->fec_mii_speed, fec->mii_speed);

 	new_bus->phy_mask = ~0;
 	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
 	if (!new_bus->irq)
 		goto out_unmap_regs;

 	for (i = 0; i < PHY_MAX_ADDR; i++)
 		new_bus->irq[i] = -1;

 	while ((np = of_get_next_child(ofdev->node, np)))
 		if (!strcmp(np->type, "ethernet-phy"))
 			add_phy(new_bus, np);

 	new_bus->dev = &ofdev->dev;
 	dev_set_drvdata(&ofdev->dev, new_bus);

 	ret = mdiobus_register(new_bus);
 	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(fec->fecp);
 out_res:
 out_fec:
 	kfree(fec);
 out_mii:
 	kfree(new_bus);
 out:
 	return ret;
 }

 static int fs_enet_mdio_remove(struct of_device *ofdev)
 {
 	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
 	struct fec_info *fec = bus->priv;

 	mdiobus_unregister(bus);
 	dev_set_drvdata(&ofdev->dev, NULL);
 	kfree(bus->irq);
 	iounmap(fec->fecp);
 	kfree(fec);
 	kfree(bus);

 	return 0;
 }

 static struct of_device_id fs_enet_mdio_fec_match[] = {
 	{
 		.compatible = "fsl,pq1-fec-mdio",
 	},
 	{},
 };

 static struct of_platform_driver fs_enet_fec_mdio_driver = {
 	.name = "fsl-fec-mdio",
 	.match_table = fs_enet_mdio_fec_match,
 	.probe = fs_enet_mdio_probe,
 	.remove = fs_enet_mdio_remove,
 };

 static int fs_enet_mdio_fec_init(void)
 {
 	return of_register_platform_driver(&fs_enet_fec_mdio_driver);
 }

 static void fs_enet_mdio_fec_exit(void)
 {
 	of_unregister_platform_driver(&fs_enet_fec_mdio_driver);
 }

 module_init(fs_enet_mdio_fec_init);
 module_exit(fs_enet_mdio_fec_exit);
 #else
 static int __devinit fs_enet_fec_mdio_probe(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct fs_mii_fec_platform_info *pdata;
 	struct mii_bus *new_bus;
 	struct fec_info *fec;
 	int err = 0;
 	if (NULL == dev)
 		return -EINVAL;
 	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);

 	if (NULL == new_bus)
 		return -ENOMEM;

 	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);

 	if (NULL == fec)
 		return -ENOMEM;

 	new_bus->name = "FEC MII Bus",
 	new_bus->read = &fs_enet_fec_mii_read,
 	new_bus->write = &fs_enet_fec_mii_write,
 	new_bus->reset = &fs_enet_fec_mii_reset,
 	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id);

 	pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data;

 	if (NULL == pdata) {
 		printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id);
 		return -ENODEV;
 	}

 	/*set up workspace*/

 	fs_mii_fec_init(fec, pdata);
 	new_bus->priv = fec;

 	new_bus->irq = pdata->irq;

 	new_bus->dev = dev;
 	dev_set_drvdata(dev, new_bus);

 	err = mdiobus_register(new_bus);

 	if (0 != err) {
 		printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
 				new_bus->name);
 		goto bus_register_fail;
 	}

 	return 0;

 bus_register_fail:
 	kfree(new_bus);

 	return err;
 }


 static int fs_enet_fec_mdio_remove(struct device *dev)
 {
 	struct mii_bus *bus = dev_get_drvdata(dev);

 	mdiobus_unregister(bus);

 	dev_set_drvdata(dev, NULL);
 	kfree(bus->priv);

 	bus->priv = NULL;
 	kfree(bus);

 	return 0;
 }

 static struct device_driver fs_enet_fec_mdio_driver = {
 	.name = "fsl-cpm-fec-mdio",
 	.bus = &platform_bus_type,
 	.probe = fs_enet_fec_mdio_probe,
 	.remove = fs_enet_fec_mdio_remove,
 };

 int fs_enet_mdio_fec_init(void)
 {
 	return driver_register(&fs_enet_fec_mdio_driver);
 }

 void fs_enet_mdio_fec_exit(void)
 {
 	driver_unregister(&fs_enet_fec_mdio_driver);
 }
 #endif
	/*
	* 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/types.h>
	#include <linux/kernel.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/init.h>
	#include <linux/delay.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>

	#ifdef CONFIG_PPC_CPM_NEW_BINDING
	#include <linux/of_platform.h>
	#endif

	#include "fs_enet.h"
	#include "fec.h"

	/* Make MII read/write commands for the FEC.
	*/
	#define mk_mii_read(REG) (0x60020000 \| ((REG & 0x1f) << 18))
	#define mk_mii_write(REG, VAL) (0x50020000 \| ((REG & 0x1f) << 18) \| (VAL & 0xffff))
	#define mk_mii_end 0

	#define FEC_MII_LOOPS 10000

	#ifndef CONFIG_PPC_CPM_NEW_BINDING
	static int match_has_phy (struct device dev, void data)
	{
	struct platform_device* pdev = container_of(dev, struct platform_device, dev);
	struct fs_platform_info* fpi;
	if(strcmp(pdev->name, (char*)data))
	{
	return 0;
	}

	fpi = pdev->dev.platform_data;
	if((fpi)&&(fpi->has_phy))
	return 1;
	return 0;
	}

	static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi)
	{
	struct resource *r;
	fec_t __iomem *fecp;
	char* name = "fsl-cpm-fec";

	/* we need fec in order to be useful */
	struct platform_device *fec_pdev =
	container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy),
	struct platform_device, dev);

	if(fec_pdev == NULL) {
	printk(KERN_ERR"Unable to find PHY for %s", name);
	return -ENODEV;
	}

	r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs");

	fec->fecp = fecp = ioremap(r->start,sizeof(fec_t));
	fec->mii_speed = fmpi->mii_speed;

	setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
	setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX \| FEC_ECNTRL_ETHER_EN);
	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
	out_be32(&fecp->fec_mii_speed, fec->mii_speed);

	return 0;
	}
	#endif

	static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
	{
	struct fec_info* fec = bus->priv;
	fec_t __iomem *fecp = fec->fecp;
	int i, ret = -1;

	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
	BUG();

	/* Add PHY address to register command. */
	out_be32(&fecp->fec_mii_data, (phy_id << 23) \| mk_mii_read(location));

	for (i = 0; i < FEC_MII_LOOPS; i++)
	if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
	break;

	if (i < FEC_MII_LOOPS) {
	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
	ret = in_be32(&fecp->fec_mii_data) & 0xffff;
	}

	return ret;
	}

	static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
	{
	struct fec_info* fec = bus->priv;
	fec_t __iomem *fecp = fec->fecp;
	int i;

	/* this must never happen */
	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
	BUG();

	/* Add PHY address to register command. */
	out_be32(&fecp->fec_mii_data, (phy_id << 23) \| mk_mii_write(location, val));

	for (i = 0; i < FEC_MII_LOOPS; i++)
	if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
	break;

	if (i < FEC_MII_LOOPS)
	out_be32(&fecp->fec_ievent, FEC_ENET_MII);

	return 0;

	}

	static int fs_enet_fec_mii_reset(struct mii_bus *bus)
	{
	/* nothing here - for now */
	return 0;
	}

	#ifdef CONFIG_PPC_CPM_NEW_BINDING
	static void __devinit add_phy(struct mii_bus bus, struct device_node np)
	{
	const u32 *data;
	int len, id, irq;

	data = of_get_property(np, "reg", &len);
	if (!data \|\| len != 4)
	return;

	id = *data;
	bus->phy_mask &= ~(1 << id);

	irq = of_irq_to_resource(np, 0, NULL);
	if (irq != NO_IRQ)
	bus->irq[id] = irq;
	}

	static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
	const struct of_device_id *match)
	{
	struct device_node *np = NULL;
	struct resource res;
	struct mii_bus *new_bus;
	struct fec_info *fec;
	int ret = -ENOMEM, i;

	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
	if (!new_bus)
	goto out;

	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
	if (!fec)
	goto out_mii;

	new_bus->priv = fec;
	new_bus->name = "FEC MII Bus";
	new_bus->read = &fs_enet_fec_mii_read;
	new_bus->write = &fs_enet_fec_mii_write;
	new_bus->reset = &fs_enet_fec_mii_reset;

	ret = of_address_to_resource(ofdev->node, 0, &res);
	if (ret)
	goto out_res;

	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start);

	fec->fecp = ioremap(res.start, res.end - res.start + 1);
	if (!fec->fecp)
	goto out_fec;

	fec->mii_speed = ((ppc_proc_freq + 4999999) / 5000000) << 1;

	setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE);
	setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX \|
	FEC_ECNTRL_ETHER_EN);
	out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII);
	out_be32(&fec->fecp->fec_mii_speed, fec->mii_speed);

	new_bus->phy_mask = ~0;
	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	if (!new_bus->irq)
	goto out_unmap_regs;

	for (i = 0; i < PHY_MAX_ADDR; i++)
	new_bus->irq[i] = -1;

	while ((np = of_get_next_child(ofdev->node, np)))
	if (!strcmp(np->type, "ethernet-phy"))
	add_phy(new_bus, np);

	new_bus->dev = &ofdev->dev;
	dev_set_drvdata(&ofdev->dev, new_bus);

	ret = mdiobus_register(new_bus);
	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(fec->fecp);
	out_res:
	out_fec:
	kfree(fec);
	out_mii:
	kfree(new_bus);
	out:
	return ret;
	}

	static int fs_enet_mdio_remove(struct of_device *ofdev)
	{
	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
	struct fec_info *fec = bus->priv;

	mdiobus_unregister(bus);
	dev_set_drvdata(&ofdev->dev, NULL);
	kfree(bus->irq);
	iounmap(fec->fecp);
	kfree(fec);
	kfree(bus);

	return 0;
	}

	static struct of_device_id fs_enet_mdio_fec_match[] = {
	{
	.compatible = "fsl,pq1-fec-mdio",
	},
	{},
	};

	static struct of_platform_driver fs_enet_fec_mdio_driver = {
	.name = "fsl-fec-mdio",
	.match_table = fs_enet_mdio_fec_match,
	.probe = fs_enet_mdio_probe,
	.remove = fs_enet_mdio_remove,
	};

	static int fs_enet_mdio_fec_init(void)
	{
	return of_register_platform_driver(&fs_enet_fec_mdio_driver);
	}

	static void fs_enet_mdio_fec_exit(void)
	{
	of_unregister_platform_driver(&fs_enet_fec_mdio_driver);
	}

	module_init(fs_enet_mdio_fec_init);
	module_exit(fs_enet_mdio_fec_exit);
	#else
	static int __devinit fs_enet_fec_mdio_probe(struct device *dev)
	{
	struct platform_device *pdev = to_platform_device(dev);
	struct fs_mii_fec_platform_info *pdata;
	struct mii_bus *new_bus;
	struct fec_info *fec;
	int err = 0;
	if (NULL == dev)
	return -EINVAL;
	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);

	if (NULL == new_bus)
	return -ENOMEM;

	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);

	if (NULL == fec)
	return -ENOMEM;

	new_bus->name = "FEC MII Bus",
	new_bus->read = &fs_enet_fec_mii_read,
	new_bus->write = &fs_enet_fec_mii_write,
	new_bus->reset = &fs_enet_fec_mii_reset,
	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id);

	pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data;

	if (NULL == pdata) {
	printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id);
	return -ENODEV;
	}

	/set up workspace/

	fs_mii_fec_init(fec, pdata);
	new_bus->priv = fec;

	new_bus->irq = pdata->irq;

	new_bus->dev = dev;
	dev_set_drvdata(dev, new_bus);

	err = mdiobus_register(new_bus);

	if (0 != err) {
	printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
	new_bus->name);
	goto bus_register_fail;
	}

	return 0;

	bus_register_fail:
	kfree(new_bus);

	return err;
	}


	static int fs_enet_fec_mdio_remove(struct device *dev)
	{
	struct mii_bus *bus = dev_get_drvdata(dev);

	mdiobus_unregister(bus);

	dev_set_drvdata(dev, NULL);
	kfree(bus->priv);

	bus->priv = NULL;
	kfree(bus);

	return 0;
	}

	static struct device_driver fs_enet_fec_mdio_driver = {
	.name = "fsl-cpm-fec-mdio",
	.bus = &platform_bus_type,
	.probe = fs_enet_fec_mdio_probe,
	.remove = fs_enet_fec_mdio_remove,
	};

	int fs_enet_mdio_fec_init(void)
	{
	return driver_register(&fs_enet_fec_mdio_driver);
	}

	void fs_enet_mdio_fec_exit(void)
	{
	driver_unregister(&fs_enet_fec_mdio_driver);
	}
	#endif