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-rw-r--r--drivers/net/phy/Kconfig32
-rw-r--r--drivers/net/phy/fixed.c445
-rw-r--r--include/linux/phy_fixed.h51
3 files changed, 195 insertions, 333 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 54b2ba99664..7fe03ce774b 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -61,34 +61,12 @@ config ICPLUS_PHY
Currently supports the IP175C PHY.
config FIXED_PHY
- tristate "Drivers for PHY emulation on fixed speed/link"
+ bool "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs"
---help---
- Adds the driver to PHY layer to cover the boards that do not have any PHY bound,
- but with the ability to manipulate the speed/link in software. The relevant MII
- speed/duplex parameters could be effectively handled in a user-specified function.
- Currently tested with mpc866ads.
-
-config FIXED_MII_10_FDX
- bool "Emulation for 10M Fdx fixed PHY behavior"
- depends on FIXED_PHY
-
-config FIXED_MII_100_FDX
- bool "Emulation for 100M Fdx fixed PHY behavior"
- depends on FIXED_PHY
-
-config FIXED_MII_1000_FDX
- bool "Emulation for 1000M Fdx fixed PHY behavior"
- depends on FIXED_PHY
-
-config FIXED_MII_AMNT
- int "Number of emulated PHYs to allocate "
- depends on FIXED_PHY
- default "1"
- ---help---
- Sometimes it is required to have several independent emulated
- PHYs on the bus (in case of multi-eth but phy-less HW for instance).
- This control will have specified number allocated for each fixed
- PHY type enabled.
+ Adds the platform "fixed" MDIO Bus to cover the boards that use
+ PHYs that are not connected to the real MDIO bus.
+
+ Currently tested with mpc866ads and mpc8349e-mitx.
config MDIO_BITBANG
tristate "Support for bitbanged MDIO buses"
diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c
index 56191822fa2..73b6d39ef6b 100644
--- a/drivers/net/phy/fixed.c
+++ b/drivers/net/phy/fixed.c
@@ -1,362 +1,253 @@
/*
- * drivers/net/phy/fixed.c
+ * Fixed MDIO bus (MDIO bus emulation with fixed PHYs)
*
- * Driver for fixed PHYs, when transceiver is able to operate in one fixed mode.
+ * Author: Vitaly Bordug <vbordug@ru.mvista.com>
+ * Anton Vorontsov <avorontsov@ru.mvista.com>
*
- * Author: Vitaly Bordug
- *
- * Copyright (c) 2006 MontaVista Software, Inc.
+ * 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/string.h>
-#include <linux/errno.h>
-#include <linux/unistd.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/mm.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
#include <linux/mii.h>
-#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
+#define MII_REGS_NUM 29
-/* we need to track the allocated pointers in order to free them on exit */
-static struct fixed_info *fixed_phy_ptrs[CONFIG_FIXED_MII_AMNT*MAX_PHY_AMNT];
-
-/*-----------------------------------------------------------------------------
- * 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_mdio_set_link_update(struct phy_device *phydev,
- int (*link_update) (struct net_device *,
- struct fixed_phy_status *))
-{
- struct fixed_info *fixed;
-
- if (link_update == NULL)
- return -EINVAL;
-
- if (phydev) {
- if (phydev->bus) {
- fixed = phydev->bus->priv;
- fixed->link_update = link_update;
- return 0;
- }
- }
- return -EINVAL;
-}
-
-EXPORT_SYMBOL(fixed_mdio_set_link_update);
+struct fixed_mdio_bus {
+ int irqs[PHY_MAX_ADDR];
+ struct mii_bus mii_bus;
+ struct list_head phys;
+};
-struct fixed_info *fixed_mdio_get_phydev (int phydev_ind)
-{
- if (phydev_ind >= MAX_PHY_AMNT)
- return NULL;
- return fixed_phy_ptrs[phydev_ind];
-}
+struct fixed_phy {
+ int id;
+ u16 regs[MII_REGS_NUM];
+ struct phy_device *phydev;
+ struct fixed_phy_status status;
+ int (*link_update)(struct net_device *, struct fixed_phy_status *);
+ struct list_head node;
+};
-EXPORT_SYMBOL(fixed_mdio_get_phydev);
+static struct platform_device *pdev;
+static struct fixed_mdio_bus platform_fmb = {
+ .phys = LIST_HEAD_INIT(platform_fmb.phys),
+};
-/*-----------------------------------------------------------------------------
- * This is used for updating internal mii regs from the status
- *-----------------------------------------------------------------------------*/
-#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
-static int fixed_mdio_update_regs(struct fixed_info *fixed)
+static int fixed_phy_update_regs(struct fixed_phy *fp)
{
- u16 *regs = fixed->regs;
- u16 bmsr = 0;
+ u16 bmsr = BMSR_ANEGCAPABLE;
u16 bmcr = 0;
+ u16 lpagb = 0;
+ u16 lpa = 0;
- if (!regs) {
- printk(KERN_ERR "%s: regs not set up", __FUNCTION__);
- return -EINVAL;
- }
-
- if (fixed->phy_status.link)
- bmsr |= BMSR_LSTATUS;
-
- if (fixed->phy_status.duplex) {
+ if (fp->status.duplex) {
bmcr |= BMCR_FULLDPLX;
- switch (fixed->phy_status.speed) {
+ switch (fp->status.speed) {
+ case 1000:
+ bmsr |= BMSR_ESTATEN;
+ bmcr |= BMCR_SPEED1000;
+ lpagb |= LPA_1000FULL;
+ break;
case 100:
bmsr |= BMSR_100FULL;
bmcr |= BMCR_SPEED100;
+ lpa |= LPA_100FULL;
break;
-
case 10:
bmsr |= BMSR_10FULL;
+ lpa |= LPA_10FULL;
break;
+ default:
+ printk(KERN_WARNING "fixed phy: unknown speed\n");
+ return -EINVAL;
}
} else {
- switch (fixed->phy_status.speed) {
+ switch (fp->status.speed) {
+ case 1000:
+ bmsr |= BMSR_ESTATEN;
+ bmcr |= BMCR_SPEED1000;
+ lpagb |= LPA_1000HALF;
+ break;
case 100:
bmsr |= BMSR_100HALF;
bmcr |= BMCR_SPEED100;
+ lpa |= LPA_100HALF;
break;
-
case 10:
- bmsr |= BMSR_100HALF;
+ bmsr |= BMSR_10HALF;
+ lpa |= LPA_10HALF;
break;
+ default:
+ printk(KERN_WARNING "fixed phy: unknown speed\n");
+ return -EINVAL;
}
}
- regs[MII_BMCR] = bmcr;
- regs[MII_BMSR] = bmsr | 0x800; /*we are always capable of 10 hdx */
+ if (fp->status.link)
+ bmsr |= BMSR_LSTATUS | BMSR_ANEGCOMPLETE;
+
+ if (fp->status.pause)
+ lpa |= LPA_PAUSE_CAP;
+
+ if (fp->status.asym_pause)
+ lpa |= LPA_PAUSE_ASYM;
+
+ fp->regs[MII_PHYSID1] = fp->id >> 16;
+ fp->regs[MII_PHYSID2] = fp->id;
+
+ fp->regs[MII_BMSR] = bmsr;
+ fp->regs[MII_BMCR] = bmcr;
+ fp->regs[MII_LPA] = lpa;
+ fp->regs[MII_STAT1000] = lpagb;
return 0;
}
-static int fixed_mii_read(struct mii_bus *bus, int phy_id, int location)
+static int fixed_mdio_read(struct mii_bus *bus, int phy_id, int reg_num)
{
- struct fixed_info *fixed = bus->priv;
-
- /* if user has registered link update callback, use it */
- if (fixed->phydev)
- if (fixed->phydev->attached_dev) {
- if (fixed->link_update) {
- fixed->link_update(fixed->phydev->attached_dev,
- &fixed->phy_status);
- fixed_mdio_update_regs(fixed);
+ struct fixed_mdio_bus *fmb = container_of(bus, struct fixed_mdio_bus,
+ mii_bus);
+ struct fixed_phy *fp;
+
+ if (reg_num >= MII_REGS_NUM)
+ return -1;
+
+ list_for_each_entry(fp, &fmb->phys, node) {
+ if (fp->id == phy_id) {
+ /* Issue callback if user registered it. */
+ if (fp->link_update) {
+ fp->link_update(fp->phydev->attached_dev,
+ &fp->status);
+ fixed_phy_update_regs(fp);
}
+ return fp->regs[reg_num];
}
+ }
- if ((unsigned int)location >= fixed->regs_num)
- return -1;
- return fixed->regs[location];
+ return 0xFFFF;
}
-static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location,
- u16 val)
+static int fixed_mdio_write(struct mii_bus *bus, int phy_id, int reg_num,
+ u16 val)
{
- /* do nothing for now */
return 0;
}
-static int fixed_mii_reset(struct mii_bus *bus)
+/*
+ * 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 *))
{
- /*nothing here - no way/need to reset it */
- return 0;
-}
-#endif
+ struct fixed_mdio_bus *fmb = &platform_fmb;
+ struct fixed_phy *fp;
-static int fixed_config_aneg(struct phy_device *phydev)
-{
- /* :TODO:03/13/2006 09:45:37 PM::
- The full autoneg funcionality can be emulated,
- but no need to have anything here for now
- */
- return 0;
-}
+ if (!link_update || !phydev || !phydev->bus)
+ return -EINVAL;
-/*-----------------------------------------------------------------------------
- * the manual bind will do the magic - with phy_id_mask == 0
- * match will never return true...
- *-----------------------------------------------------------------------------*/
-static struct phy_driver fixed_mdio_driver = {
- .name = "Fixed PHY",
-#ifdef CONFIG_FIXED_MII_1000_FDX
- .features = PHY_GBIT_FEATURES,
-#else
- .features = PHY_BASIC_FEATURES,
-#endif
- .config_aneg = fixed_config_aneg,
- .read_status = genphy_read_status,
- .driver = { .owner = THIS_MODULE, },
-};
+ list_for_each_entry(fp, &fmb->phys, node) {
+ if (fp->id == phydev->phy_id) {
+ fp->link_update = link_update;
+ fp->phydev = phydev;
+ return 0;
+ }
+ }
-static void fixed_mdio_release(struct device *dev)
-{
- struct phy_device *phydev = container_of(dev, struct phy_device, dev);
- struct mii_bus *bus = phydev->bus;
- struct fixed_info *fixed = bus->priv;
-
- kfree(phydev);
- kfree(bus->dev);
- kfree(bus);
- kfree(fixed->regs);
- kfree(fixed);
+ return -ENOENT;
}
+EXPORT_SYMBOL_GPL(fixed_phy_set_link_update);
-/*-----------------------------------------------------------------------------
- * This func is used to create all the necessary stuff, bind
- * the fixed phy driver and register all it on the mdio_bus_type.
- * speed is either 10 or 100 or 1000, duplex is boolean.
- * number is used to create multiple fixed PHYs, so that several devices can
- * utilize them simultaneously.
- *
- * The device on mdio bus will look like [bus_id]:[phy_id],
- * bus_id = number
- * phy_id = speed+duplex.
- *-----------------------------------------------------------------------------*/
-#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
-struct fixed_info *fixed_mdio_register_device(
- int bus_id, int speed, int duplex, u8 phy_id)
+int fixed_phy_add(unsigned int irq, int phy_id,
+ struct fixed_phy_status *status)
{
- struct mii_bus *new_bus;
- struct fixed_info *fixed;
- struct phy_device *phydev;
- int err;
+ int ret;
+ struct fixed_mdio_bus *fmb = &platform_fmb;
+ struct fixed_phy *fp;
- struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL);
+ fp = kzalloc(sizeof(*fp), GFP_KERNEL);
+ if (!fp)
+ return -ENOMEM;
- if (dev == NULL)
- goto err_dev_alloc;
+ memset(fp->regs, 0xFF, sizeof(fp->regs[0]) * MII_REGS_NUM);
- new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+ fmb->irqs[phy_id] = irq;
- if (new_bus == NULL)
- goto err_bus_alloc;
+ fp->id = phy_id;
+ fp->status = *status;
- fixed = kzalloc(sizeof(struct fixed_info), GFP_KERNEL);
+ ret = fixed_phy_update_regs(fp);
+ if (ret)
+ goto err_regs;
- if (fixed == NULL)
- goto err_fixed_alloc;
+ list_add_tail(&fp->node, &fmb->phys);
- fixed->regs = kzalloc(MII_REGS_NUM * sizeof(int), GFP_KERNEL);
- if (NULL == fixed->regs)
- goto err_fixed_regs_alloc;
+ return 0;
- fixed->regs_num = MII_REGS_NUM;
- fixed->phy_status.speed = speed;
- fixed->phy_status.duplex = duplex;
- fixed->phy_status.link = 1;
+err_regs:
+ kfree(fp);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(fixed_phy_add);
- new_bus->name = "Fixed MII Bus";
- new_bus->read = &fixed_mii_read;
- new_bus->write = &fixed_mii_write;
- new_bus->reset = &fixed_mii_reset;
- /*set up workspace */
- fixed_mdio_update_regs(fixed);
- new_bus->priv = fixed;
+static int __init fixed_mdio_bus_init(void)
+{
+ struct fixed_mdio_bus *fmb = &platform_fmb;
+ int ret;
- new_bus->dev = dev;
- dev_set_drvdata(dev, new_bus);
+ pdev = platform_device_register_simple("Fixed MDIO bus", 0, NULL, 0);
+ if (!pdev) {
+ ret = -ENOMEM;
+ goto err_pdev;
+ }
- /* create phy_device and register it on the mdio bus */
- phydev = phy_device_create(new_bus, 0, 0);
- if (phydev == NULL)
- goto err_phy_dev_create;
+ fmb->mii_bus.id = 0;
+ fmb->mii_bus.name = "Fixed MDIO Bus";
+ fmb->mii_bus.dev = &pdev->dev;
+ fmb->mii_bus.read = &fixed_mdio_read;
+ fmb->mii_bus.write = &fixed_mdio_write;
+ fmb->mii_bus.irq = fmb->irqs;
- /*
- * Put the phydev pointer into the fixed pack so that bus read/write
- * code could be able to access for instance attached netdev. Well it
- * doesn't have to do so, only in case of utilizing user-specified
- * link-update...
- */
+ ret = mdiobus_register(&fmb->mii_bus);
+ if (ret)
+ goto err_mdiobus_reg;
- fixed->phydev = phydev;
- phydev->speed = speed;
- phydev->duplex = duplex;
+ return 0;
- phydev->irq = PHY_IGNORE_INTERRUPT;
- phydev->dev.bus = &mdio_bus_type;
+err_mdiobus_reg:
+ platform_device_unregister(pdev);
+err_pdev:
+ return ret;
+}
+module_init(fixed_mdio_bus_init);
- snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
- PHY_ID_FMT, bus_id, phy_id);
+static void __exit fixed_mdio_bus_exit(void)
+{
+ struct fixed_mdio_bus *fmb = &platform_fmb;
+ struct fixed_phy *fp;
- phydev->bus = new_bus;
+ mdiobus_unregister(&fmb->mii_bus);
+ platform_device_unregister(pdev);
- phydev->dev.driver = &fixed_mdio_driver.driver;
- phydev->dev.release = fixed_mdio_release;
- err = phydev->dev.driver->probe(&phydev->dev);
- if (err < 0) {
- printk(KERN_ERR "Phy %s: problems with fixed driver\n",
- phydev->dev.bus_id);
- goto err_out;
- }
- err = device_register(&phydev->dev);
- if (err) {
- printk(KERN_ERR "Phy %s failed to register\n",
- phydev->dev.bus_id);
- goto err_out;
+ list_for_each_entry(fp, &fmb->phys, node) {
+ list_del(&fp->node);
+ kfree(fp);
}
- //phydev->state = PHY_RUNNING; /* make phy go up quick, but in 10Mbit/HDX
- return fixed;
-
-err_out:
- kfree(phydev);
-err_phy_dev_create:
- kfree(fixed->regs);
-err_fixed_regs_alloc:
- kfree(fixed);
-err_fixed_alloc:
- kfree(new_bus);
-err_bus_alloc:
- kfree(dev);
-err_dev_alloc:
-
- return NULL;
-
}
-#endif
+module_exit(fixed_mdio_bus_exit);
-MODULE_DESCRIPTION("Fixed PHY device & driver for PAL");
+MODULE_DESCRIPTION("Fixed MDIO bus (MDIO bus emulation with fixed PHYs)");
MODULE_AUTHOR("Vitaly Bordug");
MODULE_LICENSE("GPL");
-
-static int __init fixed_init(void)
-{
- int cnt = 0;
- int i;
-/* register on the bus... Not expected to be matched
- * with anything there...
- *
- */
- phy_driver_register(&fixed_mdio_driver);
-
-/* We will create several mdio devices here, and will bound the upper
- * driver to them.
- *
- * Then the external software can lookup the phy bus by searching
- * for 0:101, to be connected to the virtual 100M Fdx phy.
- *
- * In case several virtual PHYs required, the bus_id will be in form
- * [num]:[duplex]+[speed], which make it able even to define
- * driver-specific link control callback, if for instance PHY is
- * completely SW-driven.
- */
- for (i=1; i <= CONFIG_FIXED_MII_AMNT; i++) {
-#ifdef CONFIG_FIXED_MII_1000_FDX
- fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(0, 1000, 1, i);
-#endif
-#ifdef CONFIG_FIXED_MII_100_FDX
- fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(1, 100, 1, i);
-#endif
-#ifdef CONFIG_FIXED_MII_10_FDX
- fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(2, 10, 1, i);
-#endif
- }
-
- return 0;
-}
-
-static void __exit fixed_exit(void)
-{
- int i;
-
- phy_driver_unregister(&fixed_mdio_driver);
- for (i=0; i < MAX_PHY_AMNT; i++)
- if ( fixed_phy_ptrs[i] )
- device_unregister(&fixed_phy_ptrs[i]->phydev->dev);
-}
-
-module_init(fixed_init);
-module_exit(fixed_exit);
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index 04ba70d49fb..509d8f5f984 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -1,38 +1,31 @@
#ifndef __PHY_FIXED_H
#define __PHY_FIXED_H
-#define MII_REGS_NUM 29
-
-/* max number of virtual phy stuff */
-#define MAX_PHY_AMNT 10
-/*
- The idea is to emulate normal phy behavior by responding with
- pre-defined values to mii BMCR read, so that read_status hook could
- take all the needed info.
-*/
-
struct fixed_phy_status {
- u8 link;
- u16 speed;
- u8 duplex;
+ int link;
+ int speed;
+ int duplex;
+ int pause;
+ int asym_pause;
};
-/*-----------------------------------------------------------------------------
- * Private information hoder for mii_bus
- *-----------------------------------------------------------------------------*/
-struct fixed_info {
- u16 *regs;
- u8 regs_num;
- struct fixed_phy_status phy_status;
- struct phy_device *phydev; /* pointer to the container */
- /* link & speed cb */
- int (*link_update) (struct net_device *, struct fixed_phy_status *);
+#ifdef CONFIG_FIXED_PHY
+extern int fixed_phy_add(unsigned int irq, int phy_id,
+ struct fixed_phy_status *status);
+#else
+static inline int fixed_phy_add(unsigned int irq, int phy_id,
+ struct fixed_phy_status *status)
+{
+ return -ENODEV;
+}
+#endif /* CONFIG_FIXED_PHY */
-};
-
-
-int fixed_mdio_set_link_update(struct phy_device *,
- int (*link_update) (struct net_device *, struct fixed_phy_status *));
-struct fixed_info *fixed_mdio_get_phydev (int phydev_ind);
+/*
+ * This function issued only by fixed_phy-aware drivers, no need
+ * protect it with #ifdef
+ */
+extern int fixed_phy_set_link_update(struct phy_device *phydev,
+ int (*link_update)(struct net_device *,
+ struct fixed_phy_status *));
#endif /* __PHY_FIXED_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 11:20:36 +0000