diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/phy/Kconfig | 32 | ||||
-rw-r--r-- | drivers/net/phy/fixed.c | 445 |
2 files changed, 173 insertions, 304 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); |