| /* |
| * drivers/net/phy/phy_device.c |
| * |
| * Framework for finding and configuring PHYs. |
| * Also contains generic PHY driver |
| * |
| * Author: Andy Fleming |
| * |
| * Copyright (c) 2004 Freescale Semiconductor, 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/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> |
| |
| MODULE_DESCRIPTION("PHY library"); |
| MODULE_AUTHOR("Andy Fleming"); |
| MODULE_LICENSE("GPL"); |
| |
| void phy_device_free(struct phy_device *phydev) |
| { |
| kfree(phydev); |
| } |
| EXPORT_SYMBOL(phy_device_free); |
| |
| static void phy_device_release(struct device *dev) |
| { |
| phy_device_free(to_phy_device(dev)); |
| } |
| |
| static struct phy_driver genphy_driver; |
| extern int mdio_bus_init(void); |
| extern void mdio_bus_exit(void); |
| |
| static LIST_HEAD(phy_fixup_list); |
| static DEFINE_MUTEX(phy_fixup_lock); |
| |
| /* |
| * Creates a new phy_fixup and adds it to the list |
| * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID) |
| * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) |
| * It can also be PHY_ANY_UID |
| * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
| * comparison |
| * @run: The actual code to be run when a matching PHY is found |
| */ |
| int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, |
| int (*run)(struct phy_device *)) |
| { |
| struct phy_fixup *fixup; |
| |
| fixup = kzalloc(sizeof(struct phy_fixup), GFP_KERNEL); |
| if (!fixup) |
| return -ENOMEM; |
| |
| strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
| fixup->phy_uid = phy_uid; |
| fixup->phy_uid_mask = phy_uid_mask; |
| fixup->run = run; |
| |
| mutex_lock(&phy_fixup_lock); |
| list_add_tail(&fixup->list, &phy_fixup_list); |
| mutex_unlock(&phy_fixup_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(phy_register_fixup); |
| |
| /* Registers a fixup to be run on any PHY with the UID in phy_uid */ |
| int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, |
| int (*run)(struct phy_device *)) |
| { |
| return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); |
| } |
| EXPORT_SYMBOL(phy_register_fixup_for_uid); |
| |
| /* Registers a fixup to be run on the PHY with id string bus_id */ |
| int phy_register_fixup_for_id(const char *bus_id, |
| int (*run)(struct phy_device *)) |
| { |
| return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); |
| } |
| EXPORT_SYMBOL(phy_register_fixup_for_id); |
| |
| /* |
| * Returns 1 if fixup matches phydev in bus_id and phy_uid. |
| * Fixups can be set to match any in one or more fields. |
| */ |
| static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) |
| { |
| if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0) |
| if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
| return 0; |
| |
| if ((fixup->phy_uid & fixup->phy_uid_mask) != |
| (phydev->phy_id & fixup->phy_uid_mask)) |
| if (fixup->phy_uid != PHY_ANY_UID) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* Runs any matching fixups for this phydev */ |
| int phy_scan_fixups(struct phy_device *phydev) |
| { |
| struct phy_fixup *fixup; |
| |
| mutex_lock(&phy_fixup_lock); |
| list_for_each_entry(fixup, &phy_fixup_list, list) { |
| if (phy_needs_fixup(phydev, fixup)) { |
| int err; |
| |
| err = fixup->run(phydev); |
| |
| if (err < 0) { |
| mutex_unlock(&phy_fixup_lock); |
| return err; |
| } |
| } |
| } |
| mutex_unlock(&phy_fixup_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(phy_scan_fixups); |
| |
| 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 = kzalloc(sizeof(*dev), GFP_KERNEL); |
| |
| if (NULL == dev) |
| return (struct phy_device*) PTR_ERR((void*)-ENOMEM); |
| |
| dev->dev.release = phy_device_release; |
| |
| dev->speed = 0; |
| dev->duplex = -1; |
| dev->pause = dev->asym_pause = 0; |
| dev->link = 1; |
| dev->interface = PHY_INTERFACE_MODE_GMII; |
| |
| dev->autoneg = AUTONEG_ENABLE; |
| |
| dev->addr = addr; |
| dev->phy_id = phy_id; |
| dev->bus = bus; |
| dev->dev.parent = bus->parent; |
| dev->dev.bus = &mdio_bus_type; |
| dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL; |
| dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr); |
| |
| dev->state = PHY_DOWN; |
| |
| mutex_init(&dev->lock); |
| INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
| |
| /* Request the appropriate module unconditionally; don't |
| bother trying to do so only if it isn't already loaded, |
| because that gets complicated. A hotplug event would have |
| done an unconditional modprobe anyway. |
| We don't do normal hotplug because it won't work for MDIO |
| -- because it relies on the device staying around for long |
| enough for the driver to get loaded. With MDIO, the NIC |
| driver will get bored and give up as soon as it finds that |
| there's no driver _already_ loaded. */ |
| request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id)); |
| |
| return dev; |
| } |
| EXPORT_SYMBOL(phy_device_create); |
| |
| /** |
| * get_phy_id - reads the specified addr for its ID. |
| * @bus: the target MII bus |
| * @addr: PHY address on the MII bus |
| * @phy_id: where to store the ID retrieved. |
| * |
| * Description: Reads the ID registers of the PHY at @addr on the |
| * @bus, stores it in @phy_id and returns zero on success. |
| */ |
| int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id) |
| { |
| int phy_reg; |
| |
| /* Grab the bits from PHYIR1, and put them |
| * in the upper half */ |
| phy_reg = bus->read(bus, addr, MII_PHYSID1); |
| |
| if (phy_reg < 0) |
| return -EIO; |
| |
| *phy_id = (phy_reg & 0xffff) << 16; |
| |
| /* Grab the bits from PHYIR2, and put them in the lower half */ |
| phy_reg = bus->read(bus, addr, MII_PHYSID2); |
| |
| if (phy_reg < 0) |
| return -EIO; |
| |
| *phy_id |= (phy_reg & 0xffff); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(get_phy_id); |
| |
| /** |
| * get_phy_device - reads the specified PHY device and returns its @phy_device struct |
| * @bus: the target MII bus |
| * @addr: PHY address on the MII bus |
| * |
| * Description: Reads the ID registers of the PHY at @addr on the |
| * @bus, then allocates and returns the phy_device to represent it. |
| */ |
| struct phy_device * get_phy_device(struct mii_bus *bus, int addr) |
| { |
| struct phy_device *dev = NULL; |
| u32 phy_id; |
| int r; |
| |
| r = get_phy_id(bus, addr, &phy_id); |
| if (r) |
| return ERR_PTR(r); |
| |
| /* If the phy_id is mostly Fs, there is no device there */ |
| if ((phy_id & 0x1fffffff) == 0x1fffffff) |
| return NULL; |
| |
| dev = phy_device_create(bus, addr, phy_id); |
| |
| return dev; |
| } |
| EXPORT_SYMBOL(get_phy_device); |
| |
| /** |
| * phy_device_register - Register the phy device on the MDIO bus |
| * @phydev: phy_device structure to be added to the MDIO bus |
| */ |
| int phy_device_register(struct phy_device *phydev) |
| { |
| int err; |
| |
| /* Don't register a phy if one is already registered at this |
| * address */ |
| if (phydev->bus->phy_map[phydev->addr]) |
| return -EINVAL; |
| phydev->bus->phy_map[phydev->addr] = phydev; |
| |
| /* Run all of the fixups for this PHY */ |
| phy_scan_fixups(phydev); |
| |
| err = device_register(&phydev->dev); |
| if (err) { |
| pr_err("phy %d failed to register\n", phydev->addr); |
| goto out; |
| } |
| |
| return 0; |
| |
| out: |
| phydev->bus->phy_map[phydev->addr] = NULL; |
| return err; |
| } |
| EXPORT_SYMBOL(phy_device_register); |
| |
| /** |
| * phy_find_first - finds the first PHY device on the bus |
| * @bus: the target MII bus |
| */ |
| struct phy_device *phy_find_first(struct mii_bus *bus) |
| { |
| int addr; |
| |
| for (addr = 0; addr < PHY_MAX_ADDR; addr++) { |
| if (bus->phy_map[addr]) |
| return bus->phy_map[addr]; |
| } |
| return NULL; |
| } |
| EXPORT_SYMBOL(phy_find_first); |
| |
| /** |
| * phy_prepare_link - prepares the PHY layer to monitor link status |
| * @phydev: target phy_device struct |
| * @handler: callback function for link status change notifications |
| * |
| * Description: Tells the PHY infrastructure to handle the |
| * gory details on monitoring link status (whether through |
| * polling or an interrupt), and to call back to the |
| * connected device driver when the link status changes. |
| * If you want to monitor your own link state, don't call |
| * this function. |
| */ |
| void phy_prepare_link(struct phy_device *phydev, |
| void (*handler)(struct net_device *)) |
| { |
| phydev->adjust_link = handler; |
| } |
| |
| /** |
| * phy_connect_direct - connect an ethernet device to a specific phy_device |
| * @dev: the network device to connect |
| * @phydev: the pointer to the phy device |
| * @handler: callback function for state change notifications |
| * @flags: PHY device's dev_flags |
| * @interface: PHY device's interface |
| */ |
| int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, |
| void (*handler)(struct net_device *), u32 flags, |
| phy_interface_t interface) |
| { |
| int rc; |
| |
| rc = phy_attach_direct(dev, phydev, flags, interface); |
| if (rc) |
| return rc; |
| |
| phy_prepare_link(phydev, handler); |
| phy_start_machine(phydev, NULL); |
| if (phydev->irq > 0) |
| phy_start_interrupts(phydev); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(phy_connect_direct); |
| |
| /** |
| * phy_connect - connect an ethernet device to a PHY device |
| * @dev: the network device to connect |
| * @bus_id: the id string of the PHY device to connect |
| * @handler: callback function for state change notifications |
| * @flags: PHY device's dev_flags |
| * @interface: PHY device's interface |
| * |
| * Description: Convenience function for connecting ethernet |
| * devices to PHY devices. The default behavior is for |
| * the PHY infrastructure to handle everything, and only notify |
| * the connected driver when the link status changes. If you |
| * don't want, or can't use the provided functionality, you may |
| * choose to call only the subset of functions which provide |
| * the desired functionality. |
| */ |
| struct phy_device * phy_connect(struct net_device *dev, const char *bus_id, |
| void (*handler)(struct net_device *), u32 flags, |
| phy_interface_t interface) |
| { |
| struct phy_device *phydev; |
| struct device *d; |
| int rc; |
| |
| /* Search the list of PHY devices on the mdio bus for the |
| * PHY with the requested name */ |
| d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
| if (!d) { |
| pr_err("PHY %s not found\n", bus_id); |
| return ERR_PTR(-ENODEV); |
| } |
| phydev = to_phy_device(d); |
| |
| rc = phy_connect_direct(dev, phydev, handler, flags, interface); |
| if (rc) |
| return ERR_PTR(rc); |
| |
| return phydev; |
| } |
| EXPORT_SYMBOL(phy_connect); |
| |
| /** |
| * phy_disconnect - disable interrupts, stop state machine, and detach a PHY device |
| * @phydev: target phy_device struct |
| */ |
| void phy_disconnect(struct phy_device *phydev) |
| { |
| if (phydev->irq > 0) |
| phy_stop_interrupts(phydev); |
| |
| phy_stop_machine(phydev); |
| |
| phydev->adjust_link = NULL; |
| |
| phy_detach(phydev); |
| } |
| EXPORT_SYMBOL(phy_disconnect); |
| |
| int phy_init_hw(struct phy_device *phydev) |
| { |
| int ret; |
| |
| if (!phydev->drv || !phydev->drv->config_init) |
| return 0; |
| |
| ret = phy_scan_fixups(phydev); |
| if (ret < 0) |
| return ret; |
| |
| return phydev->drv->config_init(phydev); |
| } |
| |
| /** |
| * phy_attach_direct - attach a network device to a given PHY device pointer |
| * @dev: network device to attach |
| * @phydev: Pointer to phy_device to attach |
| * @flags: PHY device's dev_flags |
| * @interface: PHY device's interface |
| * |
| * Description: Called by drivers to attach to a particular PHY |
| * device. The phy_device is found, and properly hooked up |
| * to the phy_driver. If no driver is attached, then the |
| * genphy_driver is used. The phy_device is given a ptr to |
| * the attaching device, and given a callback for link status |
| * change. The phy_device is returned to the attaching driver. |
| */ |
| int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
| u32 flags, phy_interface_t interface) |
| { |
| struct device *d = &phydev->dev; |
| |
| /* Assume that if there is no driver, that it doesn't |
| * exist, and we should use the genphy driver. */ |
| if (NULL == d->driver) { |
| int err; |
| d->driver = &genphy_driver.driver; |
| |
| err = d->driver->probe(d); |
| if (err >= 0) |
| err = device_bind_driver(d); |
| |
| if (err) |
| return err; |
| } |
| |
| if (phydev->attached_dev) { |
| dev_err(&dev->dev, "PHY already attached\n"); |
| return -EBUSY; |
| } |
| |
| phydev->attached_dev = dev; |
| dev->phydev = phydev; |
| |
| phydev->dev_flags = flags; |
| |
| phydev->interface = interface; |
| |
| /* Do initial configuration here, now that |
| * we have certain key parameters |
| * (dev_flags and interface) */ |
| return phy_init_hw(phydev); |
| } |
| EXPORT_SYMBOL(phy_attach_direct); |
| |
| /** |
| * phy_attach - attach a network device to a particular PHY device |
| * @dev: network device to attach |
| * @bus_id: Bus ID of PHY device to attach |
| * @flags: PHY device's dev_flags |
| * @interface: PHY device's interface |
| * |
| * Description: Same as phy_attach_direct() except that a PHY bus_id |
| * string is passed instead of a pointer to a struct phy_device. |
| */ |
| struct phy_device *phy_attach(struct net_device *dev, |
| const char *bus_id, u32 flags, phy_interface_t interface) |
| { |
| struct bus_type *bus = &mdio_bus_type; |
| struct phy_device *phydev; |
| struct device *d; |
| int rc; |
| |
| /* Search the list of PHY devices on the mdio bus for the |
| * PHY with the requested name */ |
| d = bus_find_device_by_name(bus, NULL, bus_id); |
| if (!d) { |
| pr_err("PHY %s not found\n", bus_id); |
| return ERR_PTR(-ENODEV); |
| } |
| phydev = to_phy_device(d); |
| |
| rc = phy_attach_direct(dev, phydev, flags, interface); |
| if (rc) |
| return ERR_PTR(rc); |
| |
| return phydev; |
| } |
| EXPORT_SYMBOL(phy_attach); |
| |
| /** |
| * phy_detach - detach a PHY device from its network device |
| * @phydev: target phy_device struct |
| */ |
| void phy_detach(struct phy_device *phydev) |
| { |
| phydev->attached_dev->phydev = NULL; |
| phydev->attached_dev = NULL; |
| |
| /* If the device had no specific driver before (i.e. - it |
| * was using the generic driver), we unbind the device |
| * from the generic driver so that there's a chance a |
| * real driver could be loaded */ |
| if (phydev->dev.driver == &genphy_driver.driver) |
| device_release_driver(&phydev->dev); |
| } |
| EXPORT_SYMBOL(phy_detach); |
| |
| |
| /* Generic PHY support and helper functions */ |
| |
| /** |
| * genphy_config_advert - sanitize and advertise auto-negotation parameters |
| * @phydev: target phy_device struct |
| * |
| * Description: Writes MII_ADVERTISE with the appropriate values, |
| * after sanitizing the values to make sure we only advertise |
| * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
| * hasn't changed, and > 0 if it has changed. |
| */ |
| int genphy_config_advert(struct phy_device *phydev) |
| { |
| u32 advertise; |
| int oldadv, adv; |
| int err, changed = 0; |
| |
| /* Only allow advertising what |
| * this PHY supports */ |
| phydev->advertising &= phydev->supported; |
| advertise = phydev->advertising; |
| |
| /* Setup standard advertisement */ |
| oldadv = adv = phy_read(phydev, MII_ADVERTISE); |
| |
| if (adv < 0) |
| return adv; |
| |
| adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | |
| ADVERTISE_PAUSE_ASYM); |
| if (advertise & ADVERTISED_10baseT_Half) |
| adv |= ADVERTISE_10HALF; |
| if (advertise & ADVERTISED_10baseT_Full) |
| adv |= ADVERTISE_10FULL; |
| if (advertise & ADVERTISED_100baseT_Half) |
| adv |= ADVERTISE_100HALF; |
| if (advertise & ADVERTISED_100baseT_Full) |
| adv |= ADVERTISE_100FULL; |
| if (advertise & ADVERTISED_Pause) |
| adv |= ADVERTISE_PAUSE_CAP; |
| if (advertise & ADVERTISED_Asym_Pause) |
| adv |= ADVERTISE_PAUSE_ASYM; |
| |
| if (adv != oldadv) { |
| err = phy_write(phydev, MII_ADVERTISE, adv); |
| |
| if (err < 0) |
| return err; |
| changed = 1; |
| } |
| |
| /* Configure gigabit if it's supported */ |
| if (phydev->supported & (SUPPORTED_1000baseT_Half | |
| SUPPORTED_1000baseT_Full)) { |
| oldadv = adv = phy_read(phydev, MII_CTRL1000); |
| |
| if (adv < 0) |
| return adv; |
| |
| adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); |
| if (advertise & SUPPORTED_1000baseT_Half) |
| adv |= ADVERTISE_1000HALF; |
| if (advertise & SUPPORTED_1000baseT_Full) |
| adv |= ADVERTISE_1000FULL; |
| |
| if (adv != oldadv) { |
| err = phy_write(phydev, MII_CTRL1000, adv); |
| |
| if (err < 0) |
| return err; |
| changed = 1; |
| } |
| } |
| |
| return changed; |
| } |
| EXPORT_SYMBOL(genphy_config_advert); |
| |
| /** |
| * genphy_setup_forced - configures/forces speed/duplex from @phydev |
| * @phydev: target phy_device struct |
| * |
| * Description: Configures MII_BMCR to force speed/duplex |
| * to the values in phydev. Assumes that the values are valid. |
| * Please see phy_sanitize_settings(). |
| */ |
| int genphy_setup_forced(struct phy_device *phydev) |
| { |
| int err; |
| int ctl = 0; |
| |
| phydev->pause = phydev->asym_pause = 0; |
| |
| if (SPEED_1000 == phydev->speed) |
| ctl |= BMCR_SPEED1000; |
| else if (SPEED_100 == phydev->speed) |
| ctl |= BMCR_SPEED100; |
| |
| if (DUPLEX_FULL == phydev->duplex) |
| ctl |= BMCR_FULLDPLX; |
| |
| err = phy_write(phydev, MII_BMCR, ctl); |
| |
| return err; |
| } |
| |
| |
| /** |
| * genphy_restart_aneg - Enable and Restart Autonegotiation |
| * @phydev: target phy_device struct |
| */ |
| int genphy_restart_aneg(struct phy_device *phydev) |
| { |
| int ctl; |
| |
| ctl = phy_read(phydev, MII_BMCR); |
| |
| if (ctl < 0) |
| return ctl; |
| |
| ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); |
| |
| /* Don't isolate the PHY if we're negotiating */ |
| ctl &= ~(BMCR_ISOLATE); |
| |
| ctl = phy_write(phydev, MII_BMCR, ctl); |
| |
| return ctl; |
| } |
| EXPORT_SYMBOL(genphy_restart_aneg); |
| |
| |
| /** |
| * genphy_config_aneg - restart auto-negotiation or write BMCR |
| * @phydev: target phy_device struct |
| * |
| * Description: If auto-negotiation is enabled, we configure the |
| * advertising, and then restart auto-negotiation. If it is not |
| * enabled, then we write the BMCR. |
| */ |
| int genphy_config_aneg(struct phy_device *phydev) |
| { |
| int result; |
| |
| if (AUTONEG_ENABLE != phydev->autoneg) |
| return genphy_setup_forced(phydev); |
| |
| result = genphy_config_advert(phydev); |
| |
| if (result < 0) /* error */ |
| return result; |
| |
| if (result == 0) { |
| /* Advertisment hasn't changed, but maybe aneg was never on to |
| * begin with? Or maybe phy was isolated? */ |
| int ctl = phy_read(phydev, MII_BMCR); |
| |
| if (ctl < 0) |
| return ctl; |
| |
| if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) |
| result = 1; /* do restart aneg */ |
| } |
| |
| /* Only restart aneg if we are advertising something different |
| * than we were before. */ |
| if (result > 0) |
| result = genphy_restart_aneg(phydev); |
| |
| return result; |
| } |
| EXPORT_SYMBOL(genphy_config_aneg); |
| |
| /** |
| * genphy_update_link - update link status in @phydev |
| * @phydev: target phy_device struct |
| * |
| * Description: Update the value in phydev->link to reflect the |
| * current link value. In order to do this, we need to read |
| * the status register twice, keeping the second value. |
| */ |
| int genphy_update_link(struct phy_device *phydev) |
| { |
| int status; |
| |
| /* Do a fake read */ |
| status = phy_read(phydev, MII_BMSR); |
| |
| if (status < 0) |
| return status; |
| |
| /* Read link and autonegotiation status */ |
| status = phy_read(phydev, MII_BMSR); |
| |
| if (status < 0) |
| return status; |
| |
| if ((status & BMSR_LSTATUS) == 0) |
| phydev->link = 0; |
| else |
| phydev->link = 1; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(genphy_update_link); |
| |
| /** |
| * genphy_read_status - check the link status and update current link state |
| * @phydev: target phy_device struct |
| * |
| * Description: Check the link, then figure out the current state |
| * by comparing what we advertise with what the link partner |
| * advertises. Start by checking the gigabit possibilities, |
| * then move on to 10/100. |
| */ |
| int genphy_read_status(struct phy_device *phydev) |
| { |
| int adv; |
| int err; |
| int lpa; |
| int lpagb = 0; |
| |
| /* Update the link, but return if there |
| * was an error */ |
| err = genphy_update_link(phydev); |
| if (err) |
| return err; |
| |
| if (AUTONEG_ENABLE == phydev->autoneg) { |
| if (phydev->supported & (SUPPORTED_1000baseT_Half |
| | SUPPORTED_1000baseT_Full)) { |
| lpagb = phy_read(phydev, MII_STAT1000); |
| |
| if (lpagb < 0) |
| return lpagb; |
| |
| adv = phy_read(phydev, MII_CTRL1000); |
| |
| if (adv < 0) |
| return adv; |
| |
| lpagb &= adv << 2; |
| } |
| |
| lpa = phy_read(phydev, MII_LPA); |
| |
| if (lpa < 0) |
| return lpa; |
| |
| adv = phy_read(phydev, MII_ADVERTISE); |
| |
| if (adv < 0) |
| return adv; |
| |
| lpa &= adv; |
| |
| phydev->speed = SPEED_10; |
| phydev->duplex = DUPLEX_HALF; |
| phydev->pause = phydev->asym_pause = 0; |
| |
| if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { |
| phydev->speed = SPEED_1000; |
| |
| if (lpagb & LPA_1000FULL) |
| phydev->duplex = DUPLEX_FULL; |
| } else if (lpa & (LPA_100FULL | LPA_100HALF)) { |
| phydev->speed = SPEED_100; |
| |
| if (lpa & LPA_100FULL) |
| phydev->duplex = DUPLEX_FULL; |
| } else |
| if (lpa & LPA_10FULL) |
| phydev->duplex = DUPLEX_FULL; |
| |
| if (phydev->duplex == DUPLEX_FULL){ |
| phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; |
| phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; |
| } |
| } else { |
| int bmcr = phy_read(phydev, MII_BMCR); |
| if (bmcr < 0) |
| return bmcr; |
| |
| if (bmcr & BMCR_FULLDPLX) |
| phydev->duplex = DUPLEX_FULL; |
| else |
| phydev->duplex = DUPLEX_HALF; |
| |
| if (bmcr & BMCR_SPEED1000) |
| phydev->speed = SPEED_1000; |
| else if (bmcr & BMCR_SPEED100) |
| phydev->speed = SPEED_100; |
| else |
| phydev->speed = SPEED_10; |
| |
| phydev->pause = phydev->asym_pause = 0; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(genphy_read_status); |
| |
| static int genphy_config_init(struct phy_device *phydev) |
| { |
| int val; |
| u32 features; |
| |
| /* For now, I'll claim that the generic driver supports |
| * all possible port types */ |
| features = (SUPPORTED_TP | SUPPORTED_MII |
| | SUPPORTED_AUI | SUPPORTED_FIBRE | |
| SUPPORTED_BNC); |
| |
| /* Do we support autonegotiation? */ |
| val = phy_read(phydev, MII_BMSR); |
| |
| if (val < 0) |
| return val; |
| |
| if (val & BMSR_ANEGCAPABLE) |
| features |= SUPPORTED_Autoneg; |
| |
| if (val & BMSR_100FULL) |
| features |= SUPPORTED_100baseT_Full; |
| if (val & BMSR_100HALF) |
| features |= SUPPORTED_100baseT_Half; |
| if (val & BMSR_10FULL) |
| features |= SUPPORTED_10baseT_Full; |
| if (val & BMSR_10HALF) |
| features |= SUPPORTED_10baseT_Half; |
| |
| if (val & BMSR_ESTATEN) { |
| val = phy_read(phydev, MII_ESTATUS); |
| |
| if (val < 0) |
| return val; |
| |
| if (val & ESTATUS_1000_TFULL) |
| features |= SUPPORTED_1000baseT_Full; |
| if (val & ESTATUS_1000_THALF) |
| features |= SUPPORTED_1000baseT_Half; |
| } |
| |
| phydev->supported = features; |
| phydev->advertising = features; |
| |
| return 0; |
| } |
| int genphy_suspend(struct phy_device *phydev) |
| { |
| int value; |
| |
| mutex_lock(&phydev->lock); |
| |
| value = phy_read(phydev, MII_BMCR); |
| phy_write(phydev, MII_BMCR, (value | BMCR_PDOWN)); |
| |
| mutex_unlock(&phydev->lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(genphy_suspend); |
| |
| int genphy_resume(struct phy_device *phydev) |
| { |
| int value; |
| |
| mutex_lock(&phydev->lock); |
| |
| value = phy_read(phydev, MII_BMCR); |
| phy_write(phydev, MII_BMCR, (value & ~BMCR_PDOWN)); |
| |
| mutex_unlock(&phydev->lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(genphy_resume); |
| |
| /** |
| * phy_probe - probe and init a PHY device |
| * @dev: device to probe and init |
| * |
| * Description: Take care of setting up the phy_device structure, |
| * set the state to READY (the driver's init function should |
| * set it to STARTING if needed). |
| */ |
| static int phy_probe(struct device *dev) |
| { |
| struct phy_device *phydev; |
| struct phy_driver *phydrv; |
| struct device_driver *drv; |
| int err = 0; |
| |
| phydev = to_phy_device(dev); |
| |
| /* Make sure the driver is held. |
| * XXX -- Is this correct? */ |
| drv = get_driver(phydev->dev.driver); |
| phydrv = to_phy_driver(drv); |
| phydev->drv = phydrv; |
| |
| /* Disable the interrupt if the PHY doesn't support it */ |
| if (!(phydrv->flags & PHY_HAS_INTERRUPT)) |
| phydev->irq = PHY_POLL; |
| |
| mutex_lock(&phydev->lock); |
| |
| /* Start out supporting everything. Eventually, |
| * a controller will attach, and may modify one |
| * or both of these values */ |
| phydev->supported = phydrv->features; |
| phydev->advertising = phydrv->features; |
| |
| /* Set the state to READY by default */ |
| phydev->state = PHY_READY; |
| |
| if (phydev->drv->probe) |
| err = phydev->drv->probe(phydev); |
| |
| mutex_unlock(&phydev->lock); |
| |
| return err; |
| |
| } |
| |
| static int phy_remove(struct device *dev) |
| { |
| struct phy_device *phydev; |
| |
| phydev = to_phy_device(dev); |
| |
| mutex_lock(&phydev->lock); |
| phydev->state = PHY_DOWN; |
| mutex_unlock(&phydev->lock); |
| |
| if (phydev->drv->remove) |
| phydev->drv->remove(phydev); |
| |
| put_driver(dev->driver); |
| phydev->drv = NULL; |
| |
| return 0; |
| } |
| |
| /** |
| * phy_driver_register - register a phy_driver with the PHY layer |
| * @new_driver: new phy_driver to register |
| */ |
| int phy_driver_register(struct phy_driver *new_driver) |
| { |
| int retval; |
| |
| new_driver->driver.name = new_driver->name; |
| new_driver->driver.bus = &mdio_bus_type; |
| new_driver->driver.probe = phy_probe; |
| new_driver->driver.remove = phy_remove; |
| |
| retval = driver_register(&new_driver->driver); |
| |
| if (retval) { |
| printk(KERN_ERR "%s: Error %d in registering driver\n", |
| new_driver->name, retval); |
| |
| return retval; |
| } |
| |
| pr_debug("%s: Registered new driver\n", new_driver->name); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(phy_driver_register); |
| |
| void phy_driver_unregister(struct phy_driver *drv) |
| { |
| driver_unregister(&drv->driver); |
| } |
| EXPORT_SYMBOL(phy_driver_unregister); |
| |
| static struct phy_driver genphy_driver = { |
| .phy_id = 0xffffffff, |
| .phy_id_mask = 0xffffffff, |
| .name = "Generic PHY", |
| .config_init = genphy_config_init, |
| .features = 0, |
| .config_aneg = genphy_config_aneg, |
| .read_status = genphy_read_status, |
| .suspend = genphy_suspend, |
| .resume = genphy_resume, |
| .driver = {.owner= THIS_MODULE, }, |
| }; |
| |
| static int __init phy_init(void) |
| { |
| int rc; |
| |
| rc = mdio_bus_init(); |
| if (rc) |
| return rc; |
| |
| rc = phy_driver_register(&genphy_driver); |
| if (rc) |
| mdio_bus_exit(); |
| |
| return rc; |
| } |
| |
| static void __exit phy_exit(void) |
| { |
| phy_driver_unregister(&genphy_driver); |
| mdio_bus_exit(); |
| } |
| |
| subsys_initcall(phy_init); |
| module_exit(phy_exit); |