diff options
| -rw-r--r-- | drivers/net/phy/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/net/phy/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/phy/fixed.c | 358 | ||||
| -rw-r--r-- | drivers/net/phy/mdio_bus.c | 1 | ||||
| -rw-r--r-- | drivers/net/phy/phy_device.c | 51 | ||||
| -rw-r--r-- | include/linux/phy.h | 1 |
6 files changed, 408 insertions, 21 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 2ba6d3a40e2..b79ec0d7480 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -56,5 +56,22 @@ config SMSC_PHY ---help--- Currently supports the LAN83C185 PHY +config FIXED_PHY + tristate "Drivers for PHY emulation on fixed speed/link" + depends on PHYLIB + ---help--- + Adds the driver to PHY layer to cover the boards that do not have any PHY bound, + but with the ability to manipulate with speed/link in software. The relavant MII + speed/duplex parameters could be effectively handled in user-specified fuction. + 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 + endmenu diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index a00e6194252..320f8323123 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -10,3 +10,4 @@ obj-$(CONFIG_LXT_PHY) += lxt.o obj-$(CONFIG_QSEMI_PHY) += qsemi.o obj-$(CONFIG_SMSC_PHY) += smsc.o obj-$(CONFIG_VITESSE_PHY) += vitesse.o +obj-$(CONFIG_FIXED_PHY) += fixed.o diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c new file mode 100644 index 00000000000..341036df471 --- /dev/null +++ b/drivers/net/phy/fixed.c @@ -0,0 +1,358 @@ +/* + * drivers/net/phy/fixed.c + * + * Driver for fixed PHYs, when transceiver is able to operate in one fixed mode. + * + * Author: Vitaly Bordug + * + * Copyright (c) 2006 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/config.h> +#include <linux/kernel.h> +#include <linux/sched.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/mii.h> +#include <linux/ethtool.h> +#include <linux/phy.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/uaccess.h> + +#define MII_REGS_NUM 7 + +/* + 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; +}; + +/*----------------------------------------------------------------------------- + * 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*); + +}; + +/*----------------------------------------------------------------------------- + * 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); + +/*----------------------------------------------------------------------------- + * This is used for updating internal mii regs from the status + *-----------------------------------------------------------------------------*/ +static int fixed_mdio_update_regs(struct fixed_info *fixed) +{ + u16 *regs = fixed->regs; + u16 bmsr = 0; + u16 bmcr = 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) { + bmcr |= BMCR_FULLDPLX; + + switch ( fixed->phy_status.speed ) { + case 100: + bmsr |= BMSR_100FULL; + bmcr |= BMCR_SPEED100; + break; + + case 10: + bmsr |= BMSR_10FULL; + break; + } + } else { + switch ( fixed->phy_status.speed ) { + case 100: + bmsr |= BMSR_100HALF; + bmcr |= BMCR_SPEED100; + break; + + case 10: + bmsr |= BMSR_100HALF; + break; + } + } + + regs[MII_BMCR] = bmcr; + regs[MII_BMSR] = bmsr | 0x800; /*we are always capable of 10 hdx*/ + + return 0; +} + +static int fixed_mii_read(struct mii_bus *bus, int phy_id, int location) +{ + 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); + } + } + + if ((unsigned int)location >= fixed->regs_num) + return -1; + return fixed->regs[location]; +} + +static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val) +{ + /* do nothing for now*/ + return 0; +} + +static int fixed_mii_reset(struct mii_bus *bus) +{ + /*nothing here - no way/need to reset it*/ + return 0; +} + +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; +} + +/*----------------------------------------------------------------------------- + * 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", + .features = PHY_BASIC_FEATURES, + .config_aneg = fixed_config_aneg, + .read_status = genphy_read_status, + .driver = { .owner = THIS_MODULE,}, +}; + +/*----------------------------------------------------------------------------- + * 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, duplex is boolean. + * number is used to create multiple fixed PHYs, so that several devices can + * utilize them simultaneously. + *-----------------------------------------------------------------------------*/ +static int fixed_mdio_register_device(int number, int speed, int duplex) +{ + struct mii_bus *new_bus; + struct fixed_info *fixed; + struct phy_device *phydev; + int err = 0; + + struct device* dev = kzalloc(sizeof(struct device), GFP_KERNEL); + + if (NULL == dev) + return -ENOMEM; + + new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL); + + if (NULL == new_bus) { + kfree(dev); + return -ENOMEM; + } + fixed = kzalloc(sizeof(struct fixed_info), GFP_KERNEL); + + if (NULL == fixed) { + kfree(dev); + kfree(new_bus); + return -ENOMEM; + } + + fixed->regs = kzalloc(MII_REGS_NUM*sizeof(int), GFP_KERNEL); + fixed->regs_num = MII_REGS_NUM; + fixed->phy_status.speed = speed; + fixed->phy_status.duplex = duplex; + fixed->phy_status.link = 1; + + 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; + + new_bus->dev = dev; + dev_set_drvdata(dev, new_bus); + + /* create phy_device and register it on the mdio bus */ + phydev = phy_device_create(new_bus, 0, 0); + + /* + 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... + */ + fixed->phydev = phydev; + + if(NULL == phydev) { + err = -ENOMEM; + goto device_create_fail; + } + + phydev->irq = -1; + phydev->dev.bus = &mdio_bus_type; + + if(number) + snprintf(phydev->dev.bus_id, BUS_ID_SIZE, + "fixed_%d@%d:%d", number, speed, duplex); + else + snprintf(phydev->dev.bus_id, BUS_ID_SIZE, + "fixed@%d:%d", speed, duplex); + phydev->bus = new_bus; + + err = device_register(&phydev->dev); + if(err) { + printk(KERN_ERR "Phy %s failed to register\n", + phydev->dev.bus_id); + goto bus_register_fail; + } + + /* + the mdio bus has phy_id match... In order not to do it + artificially, we are binding the driver here by hand; + it will be the same for all the fixed phys anyway. + */ + down_write(&phydev->dev.bus->subsys.rwsem); + + phydev->dev.driver = &fixed_mdio_driver.driver; + + err = phydev->dev.driver->probe(&phydev->dev); + if(err < 0) { + printk(KERN_ERR "Phy %s: problems with fixed driver\n",phydev->dev.bus_id); + up_write(&phydev->dev.bus->subsys.rwsem); + goto probe_fail; + } + + device_bind_driver(&phydev->dev); + up_write(&phydev->dev.bus->subsys.rwsem); + + return 0; + +probe_fail: + device_unregister(&phydev->dev); +bus_register_fail: + kfree(phydev); +device_create_fail: + kfree(dev); + kfree(new_bus); + kfree(fixed); + + return err; +} + + +MODULE_DESCRIPTION("Fixed PHY device & driver for PAL"); +MODULE_AUTHOR("Vitaly Bordug"); +MODULE_LICENSE("GPL"); + +static int __init fixed_init(void) +{ + int ret; + int duplex = 0; + + /* register on the bus... Not expected to be matched with anything there... */ + phy_driver_register(&fixed_mdio_driver); + + /* So let the fun begin... + 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 + fixed@speed:duplex, e.g. fixed@100:1, to be connected to the + virtual 100M Fdx phy. + + In case several virtual PHYs required, the bus_id will be in form + fixed_<num>@<speed>:<duplex>, which make it able even to define + driver-specific link control callback, if for instance PHY is completely + SW-driven. + + */ + +#ifdef CONFIG_FIXED_MII_DUPLEX + duplex = 1; +#endif + +#ifdef CONFIG_FIXED_MII_100_FDX + fixed_mdio_register_device(0, 100, 1); +#endif + +#ifdef CONFIX_FIXED_MII_10_FDX + fixed_mdio_register_device(0, 10, 1); +#endif + return 0; +} + +static void __exit fixed_exit(void) +{ + phy_driver_unregister(&fixed_mdio_driver); + /* :WARNING:02/18/2006 04:32:40 AM:: Cleanup all the created stuff */ +} + +module_init(fixed_init); +module_exit(fixed_exit); diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 1dde390c164..cf6660c93ff 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -159,6 +159,7 @@ struct bus_type mdio_bus_type = { .suspend = mdio_bus_suspend, .resume = mdio_bus_resume, }; +EXPORT_SYMBOL(mdio_bus_type); int __init mdio_bus_init(void) { diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 1bc1e032c5d..2d1ecfdc80d 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -45,6 +45,35 @@ static struct phy_driver genphy_driver; extern int mdio_bus_init(void); extern void mdio_bus_exit(void); +struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id) +{ + struct phy_device *dev; + /* We allocate the device, and initialize the + * default values */ + dev = kcalloc(1, sizeof(*dev), GFP_KERNEL); + + if (NULL == dev) + return (struct phy_device*) PTR_ERR((void*)-ENOMEM); + + dev->speed = 0; + dev->duplex = -1; + dev->pause = dev->asym_pause = 0; + dev->link = 1; + + dev->autoneg = AUTONEG_ENABLE; + + dev->addr = addr; + dev->phy_id = phy_id; + dev->bus = bus; + + dev->state = PHY_DOWN; + + spin_lock_init(&dev->lock); + + return dev; +} +EXPORT_SYMBOL(phy_device_create); + /* get_phy_device * * description: Reads the ID registers of the PHY at addr on the @@ -78,27 +107,7 @@ struct phy_device * get_phy_device(struct mii_bus *bus, int addr) if (0xffffffff == phy_id) return NULL; - /* Otherwise, we allocate the device, and initialize the - * default values */ - dev = kcalloc(1, sizeof(*dev), GFP_KERNEL); - - if (NULL == dev) - return ERR_PTR(-ENOMEM); - - dev->speed = 0; - dev->duplex = -1; - dev->pause = dev->asym_pause = 0; - dev->link = 1; - - dev->autoneg = AUTONEG_ENABLE; - - dev->addr = addr; - dev->phy_id = phy_id; - dev->bus = bus; - - dev->state = PHY_DOWN; - - spin_lock_init(&dev->lock); + dev = phy_device_create(bus, addr, phy_id); return dev; } diff --git a/include/linux/phy.h b/include/linux/phy.h index 331521a10a2..9447a57ee8a 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -378,6 +378,7 @@ int phy_mii_ioctl(struct phy_device *phydev, struct mii_ioctl_data *mii_data, int cmd); int phy_start_interrupts(struct phy_device *phydev); void phy_print_status(struct phy_device *phydev); +struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id); extern struct bus_type mdio_bus_type; #endif /* __PHY_H */ |