Release 4.10 drivers/net/phy/fixed_phy.c

/*
 * Fixed MDIO bus (MDIO bus emulation with fixed PHYs)
 *
 * Author: Vitaly Bordug <vbordug@ru.mvista.com>
 *         Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * Copyright (c) 2006-2007 MontaVista Software, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/list.h>
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/gpio.h>
#include <linux/seqlock.h>
#include <linux/idr.h>

#include "swphy.h"


struct fixed_mdio_bus {
	
struct mii_bus *mii_bus;
	
struct list_head phys;
};


struct fixed_phy {
	
int addr;
	
struct phy_device *phydev;
	
seqcount_t seqcount;
	
struct fixed_phy_status status;
	
int (*link_update)(struct net_device *, struct fixed_phy_status *);
	
struct list_head node;
	
int link_gpio;
};


static struct platform_device *pdev;

static struct fixed_mdio_bus platform_fmb = {
	.phys = LIST_HEAD_INIT(platform_fmb.phys),
};



static void fixed_phy_update(struct fixed_phy *fp)
{
	if (gpio_is_valid(fp->link_gpio))
		fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
andrew lunn
andrew lunn
22
62.86%
1
20.00%
vitaly bordug
vitaly bordug
11
31.43%
2
40.00%
russell king
russell king
2
5.71%
2
40.00%
Total
35
100.00%
5
100.00%



static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
{
	struct fixed_mdio_bus *fmb = bus->priv;
	struct fixed_phy *fp;

	list_for_each_entry(fp, &fmb->phys, node) {
		if (fp->addr == phy_addr) {
			struct fixed_phy_status state;
			int s;

			do {
				s = read_seqcount_begin(&fp->seqcount);
				/* Issue callback if user registered it. */
				if (fp->link_update) {
					fp->link_update(fp->phydev->attached_dev,
							&fp->status);
					fixed_phy_update(fp);
				}
				state = fp->status;
			} while (read_seqcount_retry(&fp->seqcount, s));

			return swphy_read_reg(reg_num, &state);
		}
	}

	return 0xFFFF;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
vitaly bordug
vitaly bordug
80
60.61%
2
33.33%
russell king
russell king
47
35.61%
2
33.33%
thomas petazzoni
thomas petazzoni
3
2.27%
1
16.67%
lennert buytenhek
lennert buytenhek
2
1.52%
1
16.67%
Total
132
100.00%
6
100.00%



static int fixed_mdio_write(struct mii_bus *bus, int phy_addr, int reg_num,
			    u16 val)
{
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
vitaly bordug
vitaly bordug
22
95.65%
2
66.67%
thomas petazzoni
thomas petazzoni
1
4.35%
1
33.33%
Total
23
100.00%
3
100.00%

/*
 * If something weird is required to be done with link/speed,
 * network driver is able to assign a function to implement this.
 * May be useful for PHY's that need to be software-driven.
 */


int fixed_phy_set_link_update(struct phy_device *phydev,
			      int (*link_update)(struct net_device *,
						 struct fixed_phy_status *))
{
	struct fixed_mdio_bus *fmb = &platform_fmb;
	struct fixed_phy *fp;

	if (!phydev || !phydev->mdio.bus)
		return -EINVAL;

	list_for_each_entry(fp, &fmb->phys, node) {
		if (fp->addr == phydev->mdio.addr) {
			fp->link_update = link_update;
			fp->phydev = phydev;
			return 0;
		}
	}

	return -ENOENT;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
vitaly bordug
vitaly bordug
91
93.81%
3
60.00%
andrew lunn
andrew lunn
4
4.12%
1
20.00%
thomas petazzoni
thomas petazzoni
2
2.06%
1
20.00%
Total
97
100.00%
5
100.00%


EXPORT_SYMBOL_GPL(fixed_phy_set_link_update);



int fixed_phy_update_state(struct phy_device *phydev,
			   const struct fixed_phy_status *status,
			   const struct fixed_phy_status *changed)
{
	struct fixed_mdio_bus *fmb = &platform_fmb;
	struct fixed_phy *fp;

	if (!phydev || phydev->mdio.bus != fmb->mii_bus)
		return -EINVAL;

	list_for_each_entry(fp, &fmb->phys, node) {
		if (fp->addr == phydev->mdio.addr) {
			write_seqcount_begin(&fp->seqcount);

#define _UPD(x) if (changed->x) \
        fp->status.x = status->x
			_UPD(link);
			_UPD(speed);
			_UPD(duplex);
			_UPD(pause);
			_UPD(asym_pause);

#undef _UPD
			fixed_phy_update(fp);
			write_seqcount_end(&fp->seqcount);
			return 0;
		}
	}

	return -ENOENT;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
stas sergeev
stas sergeev
116
82.27%
1
20.00%
russell king
russell king
21
14.89%
3
60.00%
andrew lunn
andrew lunn
4
2.84%
1
20.00%
Total
141
100.00%
5
100.00%


EXPORT_SYMBOL(fixed_phy_update_state);



int fixed_phy_add(unsigned int irq, int phy_addr,
		  struct fixed_phy_status *status,
		  int link_gpio)
{
	int ret;
	struct fixed_mdio_bus *fmb = &platform_fmb;
	struct fixed_phy *fp;

	ret = swphy_validate_state(status);
	if (ret < 0)
		return ret;

	fp = kzalloc(sizeof(*fp), GFP_KERNEL);
	if (!fp)
		return -ENOMEM;

	seqcount_init(&fp->seqcount);

	if (irq != PHY_POLL)
		fmb->mii_bus->irq[phy_addr] = irq;

	fp->addr = phy_addr;
	fp->status = *status;
	fp->link_gpio = link_gpio;

	if (gpio_is_valid(fp->link_gpio)) {
		ret = gpio_request_one(fp->link_gpio, GPIOF_DIR_IN,
				       "fixed-link-gpio-link");
		if (ret)
			goto err_regs;
	}

	fixed_phy_update(fp);

	list_add_tail(&fp->node, &fmb->phys);

	return 0;

err_regs:
	kfree(fp);
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
vitaly bordug
vitaly bordug
111
61.67%
3
30.00%
andrew lunn
andrew lunn
34
18.89%
2
20.00%
russell king
russell king
25
13.89%
3
30.00%
rabin vincent
rabin vincent
6
3.33%
1
10.00%
thomas petazzoni
thomas petazzoni
4
2.22%
1
10.00%
Total
180
100.00%
10
100.00%


EXPORT_SYMBOL_GPL(fixed_phy_add);

static DEFINE_IDA(phy_fixed_ida);



static void fixed_phy_del(int phy_addr)
{
	struct fixed_mdio_bus *fmb = &platform_fmb;
	struct fixed_phy *fp, *tmp;

	list_for_each_entry_safe(fp, tmp, &fmb->phys, node) {
		if (fp->addr == phy_addr) {
			list_del(&fp->node);
			if (gpio_is_valid(fp->link_gpio))
				gpio_free(fp->link_gpio);
			kfree(fp);
			ida_simple_remove(&phy_fixed_ida, phy_addr);
			return;
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas petazzoni
thomas petazzoni
60
70.59%
1
25.00%
andrew lunn
andrew lunn
17
20.00%
2
50.00%
florian fainelli
florian fainelli
8
9.41%
1
25.00%
Total
85
100.00%
4
100.00%



struct phy_device *fixed_phy_register(unsigned int irq,
				      struct fixed_phy_status *status,
				      int link_gpio,
				      struct device_node *np)
{
	struct fixed_mdio_bus *fmb = &platform_fmb;
	struct phy_device *phy;
	int phy_addr;
	int ret;

	if (!fmb->mii_bus || fmb->mii_bus->state != MDIOBUS_REGISTERED)
		return ERR_PTR(-EPROBE_DEFER);

	/* Get the next available PHY address, up to PHY_MAX_ADDR */
	phy_addr = ida_simple_get(&phy_fixed_ida, 0, PHY_MAX_ADDR, GFP_KERNEL);
	if (phy_addr < 0)
		return ERR_PTR(phy_addr);

	ret = fixed_phy_add(irq, phy_addr, status, link_gpio);
	if (ret < 0) {
		ida_simple_remove(&phy_fixed_ida, phy_addr);
		return ERR_PTR(ret);
	}

	phy = get_phy_device(fmb->mii_bus, phy_addr, false);
	if (IS_ERR(phy)) {
		fixed_phy_del(phy_addr);
		return ERR_PTR(-EINVAL);
	}

	/* propagate the fixed link values to struct phy_device */
	phy->link = status->link;
	if (status->link) {
		phy->speed = status->speed;
		phy->duplex = status->duplex;
		phy->pause = status->pause;
		phy->asym_pause = status->asym_pause;
	}

	of_node_get(np);
	phy->mdio.dev.of_node = np;
	phy->is_pseudo_fixed_link = true;

	switch (status->speed) {
	case SPEED_1000:
		phy->supported = PHY_1000BT_FEATURES;
		break;
	case SPEED_100:
		phy->supported = PHY_100BT_FEATURES;
		break;
	case SPEED_10:
	default:
		phy->supported = PHY_10BT_FEATURES;
	}

	ret = phy_device_register(phy);
	if (ret) {
		phy_device_free(phy);
		of_node_put(np);
		fixed_phy_del(phy_addr);
		return ERR_PTR(ret);
	}

	return phy;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
thomas petazzoni
thomas petazzoni
144
47.06%
1
10.00%
madalin bucur
madalin bucur
49
16.01%
1
10.00%
andrew lunn
andrew lunn
45
14.71%
3
30.00%
florian fainelli
florian fainelli
30
9.80%
2
20.00%
rabin vincent
rabin vincent
22
7.19%
1
10.00%
petri gynther
petri gynther
15
4.90%
1
10.00%
sergei shtylyov
sergei shtylyov
1
0.33%
1
10.00%
Total
306
100.00%
10
100.00%


EXPORT_SYMBOL_GPL(fixed_phy_register);



void fixed_phy_unregister(struct phy_device *phy)
{
	phy_device_remove(phy);
	of_node_put(phy->mdio.dev.of_node);
	fixed_phy_del(phy->mdio.addr);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
andrew lunn
andrew lunn
24
68.57%
1
50.00%
johan hovold
johan hovold
11
31.43%
1
50.00%
Total
35
100.00%
2
100.00%


EXPORT_SYMBOL_GPL(fixed_phy_unregister);



static int __init fixed_mdio_bus_init(void)
{
	struct fixed_mdio_bus *fmb = &platform_fmb;
	int ret;

	pdev = platform_device_register_simple("Fixed MDIO bus", 0, NULL, 0);
	if (IS_ERR(pdev)) {
		ret = PTR_ERR(pdev);
		goto err_pdev;
	}

	fmb->mii_bus = mdiobus_alloc();
	if (fmb->mii_bus == NULL) {
		ret = -ENOMEM;
		goto err_mdiobus_reg;
	}

	snprintf(fmb->mii_bus->id, MII_BUS_ID_SIZE, "fixed-0");
	fmb->mii_bus->name = "Fixed MDIO Bus";
	fmb->mii_bus->priv = fmb;
	fmb->mii_bus->parent = &pdev->dev;
	fmb->mii_bus->read = &fixed_mdio_read;
	fmb->mii_bus->write = &fixed_mdio_write;

	ret = mdiobus_register(fmb->mii_bus);
	if (ret)
		goto err_mdiobus_alloc;

	return 0;

err_mdiobus_alloc:
	mdiobus_free(fmb->mii_bus);
err_mdiobus_reg:
	platform_device_unregister(pdev);
err_pdev:
	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
vitaly bordug
vitaly bordug
106
60.57%
3
30.00%
lennert buytenhek
lennert buytenhek
49
28.00%
3
30.00%
dan carpenter
dan carpenter
7
4.00%
1
10.00%
jeff garzik
jeff garzik
6
3.43%
1
10.00%
andy fleming
andy fleming
6
3.43%
1
10.00%
florian fainelli
florian fainelli
1
0.57%
1
10.00%
Total
175
100.00%
10
100.00%


module_init(fixed_mdio_bus_init);



static void __exit fixed_mdio_bus_exit(void)
{
	struct fixed_mdio_bus *fmb = &platform_fmb;
	struct fixed_phy *fp, *tmp;

	mdiobus_unregister(fmb->mii_bus);
	mdiobus_free(fmb->mii_bus);
	platform_device_unregister(pdev);

	list_for_each_entry_safe(fp, tmp, &fmb->phys, node) {
		list_del(&fp->node);
		kfree(fp);
	}
	ida_destroy(&phy_fixed_ida);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
vitaly bordug
vitaly bordug
56
74.67%
3
50.00%
lennert buytenhek
lennert buytenhek
7
9.33%
1
16.67%
florian fainelli
florian fainelli
6
8.00%
1
16.67%
adrian bunk
adrian bunk
6
8.00%
1
16.67%
Total
75
100.00%
6
100.00%


module_exit(fixed_mdio_bus_exit);

MODULE_DESCRIPTION("Fixed MDIO bus (MDIO bus emulation with fixed PHYs)");
MODULE_AUTHOR("Vitaly Bordug");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
vitaly bordug
vitaly bordug
606
41.42%
3
8.82%
thomas petazzoni
thomas petazzoni
218
14.90%
2
5.88%
andrew lunn
andrew lunn
161
11.00%
5
14.71%
stas sergeev
stas sergeev
121
8.27%
1
2.94%
russell king
russell king
104
7.11%
5
14.71%
lennert buytenhek
lennert buytenhek
59
4.03%
3
8.82%
florian fainelli
florian fainelli
52
3.55%
3
8.82%
madalin bucur
madalin bucur
49
3.35%
1
2.94%
rabin vincent
rabin vincent
28
1.91%
1
2.94%
petri gynther
petri gynther
15
1.03%
1
2.94%
johan hovold
johan hovold
11
0.75%
1
2.94%
dan carpenter
dan carpenter
10
0.68%
1
2.94%
jeff garzik
jeff garzik
6
0.41%
1
2.94%
andy fleming
andy fleming
6
0.41%
1
2.94%
adrian bunk
adrian bunk
6
0.41%
1
2.94%
mark salter
mark salter
5
0.34%
1
2.94%
tejun heo
tejun heo
3
0.21%
1
2.94%
david s. miller
david s. miller
2
0.14%
1
2.94%
sergei shtylyov
sergei shtylyov
1
0.07%
1
2.94%
Total
1463
100.00%
34
100.00%
Directory: drivers/net/phy

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.