diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/phy/phy.c | 128 |
1 files changed, 78 insertions, 50 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 1ffa791..d0ed766 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -31,6 +31,7 @@ #include <miiphy.h> #include <phy.h> #include <errno.h> +#include <linux/err.h> /* Generic PHY support and helper functions */ @@ -574,6 +575,61 @@ static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id) return 0; } +static struct phy_device *create_phy_by_mask(struct mii_dev *bus, + unsigned phy_mask, int devad, phy_interface_t interface) +{ + u32 phy_id = 0xffffffff; + while (phy_mask) { + int addr = ffs(phy_mask) - 1; + int r = get_phy_id(bus, addr, devad, &phy_id); + if (r < 0) + return ERR_PTR(r); + /* If the PHY ID is mostly f's, we didn't find anything */ + if ((phy_id & 0x1fffffff) != 0x1fffffff) + return phy_device_create(bus, addr, phy_id, interface); + phy_mask &= ~(1 << addr); + } + return NULL; +} + +static struct phy_device *search_for_existing_phy(struct mii_dev *bus, + unsigned phy_mask, phy_interface_t interface) +{ + /* If we have one, return the existing device, with new interface */ + while (phy_mask) { + int addr = ffs(phy_mask) - 1; + if (bus->phymap[addr]) { + bus->phymap[addr]->interface = interface; + return bus->phymap[addr]; + } + phy_mask &= ~(1 << addr); + } + return NULL; +} + +static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus, + unsigned phy_mask, phy_interface_t interface) +{ + int i; + struct phy_device *phydev; + + phydev = search_for_existing_phy(bus, phy_mask, interface); + if (phydev) + return phydev; + /* Try Standard (ie Clause 22) access */ + /* Otherwise we have to try Clause 45 */ + for (i = 0; i < 5; i++) { + phydev = create_phy_by_mask(bus, phy_mask, + i ? i : MDIO_DEVAD_NONE, interface); + if (IS_ERR(phydev)) + return NULL; + if (phydev) + return phydev; + } + printf("Phy not found\n"); + return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface); +} + /** * get_phy_device - reads the specified PHY device and returns its @phy_device struct * @bus: the target MII bus @@ -585,38 +641,7 @@ static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id) static struct phy_device *get_phy_device(struct mii_dev *bus, int addr, phy_interface_t interface) { - u32 phy_id = 0x1fffffff; - int i; - int r; - - /* If we have one, return the existing device, with new interface */ - if (bus->phymap[addr]) { - bus->phymap[addr]->interface = interface; - - return bus->phymap[addr]; - } - - /* Try Standard (ie Clause 22) access */ - r = get_phy_id(bus, addr, MDIO_DEVAD_NONE, &phy_id); - if (r) - return NULL; - - /* If the PHY ID is mostly f's, we didn't find anything */ - if ((phy_id & 0x1fffffff) != 0x1fffffff) - return phy_device_create(bus, addr, phy_id, interface); - - /* Otherwise we have to try Clause 45 */ - for (i = 1; i < 5; i++) { - r = get_phy_id(bus, addr, i, &phy_id); - if (r) - return NULL; - - /* If the phy_id is mostly Fs, there is no device there */ - if ((phy_id & 0x1fffffff) != 0x1fffffff) - break; - } - - return phy_device_create(bus, addr, phy_id, interface); + return get_phy_device_by_mask(bus, 1 << addr, interface); } int phy_reset(struct phy_device *phydev) @@ -689,38 +714,41 @@ int miiphy_reset(const char *devname, unsigned char addr) return phy_reset(phydev); } -struct phy_device *phy_connect(struct mii_dev *bus, int addr, - struct eth_device *dev, - phy_interface_t interface) +struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask, + phy_interface_t interface) { - struct phy_device *phydev; - /* Reset the bus */ if (bus->reset) bus->reset(bus); /* Wait 15ms to make sure the PHY has come out of hard reset */ udelay(15000); + return get_phy_device_by_mask(bus, phy_mask, interface); +} - phydev = get_phy_device(bus, addr, interface); - - if (!phydev) { - printf("Could not get PHY for %s:%d\n", bus->name, addr); - - return NULL; - } - +void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev) +{ /* Soft Reset the PHY */ phy_reset(phydev); - - if (phydev->dev) + if (phydev->dev) { printf("%s:%d is connected to %s. Reconnecting to %s\n", - bus->name, addr, phydev->dev->name, dev->name); - + phydev->bus->name, phydev->addr, + phydev->dev->name, dev->name); + } phydev->dev = dev; - debug("%s connected to %s\n", dev->name, phydev->drv->name); +} + +struct phy_device *phy_connect(struct mii_dev *bus, int addr, + struct eth_device *dev, phy_interface_t interface) +{ + struct phy_device *phydev; + phydev = phy_find_by_mask(bus, 1 << addr, interface); + if (phydev) + phy_connect_dev(phydev, dev); + else + printf("Could not get PHY for %s: addr %d\n", bus->name, addr); return phydev; } |