diff options
Diffstat (limited to 'drivers/net/ibm_emac/ibm_emac_phy.c')
| -rw-r--r-- | drivers/net/ibm_emac/ibm_emac_phy.c | 398 |
1 files changed, 0 insertions, 398 deletions
diff --git a/drivers/net/ibm_emac/ibm_emac_phy.c b/drivers/net/ibm_emac/ibm_emac_phy.c deleted file mode 100644 index e57862b34ca..00000000000 --- a/drivers/net/ibm_emac/ibm_emac_phy.c +++ /dev/null @@ -1,398 +0,0 @@ -/* - * drivers/net/ibm_emac/ibm_emac_phy.c - * - * Driver for PowerPC 4xx on-chip ethernet controller, PHY support. - * Borrowed from sungem_phy.c, though I only kept the generic MII - * driver for now. - * - * This file should be shared with other drivers or eventually - * merged as the "low level" part of miilib - * - * (c) 2003, Benjamin Herrenscmidt (benh@kernel.crashing.org) - * (c) 2004-2005, Eugene Surovegin <ebs@ebshome.net> - * - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/netdevice.h> -#include <linux/mii.h> -#include <linux/ethtool.h> -#include <linux/delay.h> - -#include <asm/ocp.h> - -#include "ibm_emac_core.h" -#include "ibm_emac_phy.h" - -static inline int phy_read(struct mii_phy *phy, int reg) -{ - return phy->mdio_read(phy->dev, phy->address, reg); -} - -static inline void phy_write(struct mii_phy *phy, int reg, int val) -{ - phy->mdio_write(phy->dev, phy->address, reg, val); -} - -/* - * polls MII_BMCR until BMCR_RESET bit clears or operation times out. - * - * returns: - * >= 0 => success, value in BMCR returned to caller - * -EBUSY => failure, RESET bit never cleared - * otherwise => failure, lower level PHY read failed - */ -static int mii_spin_reset_complete(struct mii_phy *phy) -{ - int val; - int limit = 10000; - - while (limit--) { - val = phy_read(phy, MII_BMCR); - if (val >= 0 && !(val & BMCR_RESET)) - return val; /* success */ - udelay(10); - } - if (val & BMCR_RESET) - val = -EBUSY; - - if (net_ratelimit()) - printk(KERN_ERR "emac%d: PHY reset timeout (%d)\n", - ((struct ocp_enet_private *)phy->dev->priv)->def->index, - val); - return val; -} - -int mii_reset_phy(struct mii_phy *phy) -{ - int val; - - val = phy_read(phy, MII_BMCR); - val &= ~BMCR_ISOLATE; - val |= BMCR_RESET; - phy_write(phy, MII_BMCR, val); - - udelay(300); - - val = mii_spin_reset_complete(phy); - if (val >= 0 && (val & BMCR_ISOLATE)) - phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE); - - return val < 0; -} - -static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise) -{ - int ctl, adv; - - phy->autoneg = AUTONEG_ENABLE; - phy->speed = SPEED_10; - phy->duplex = DUPLEX_HALF; - phy->pause = phy->asym_pause = 0; - phy->advertising = advertise; - - /* Setup standard advertise */ - adv = phy_read(phy, 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; - phy_write(phy, MII_ADVERTISE, adv); - - if (phy->features & - (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) { - adv = phy_read(phy, MII_CTRL1000); - if (adv < 0) - return adv; - adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); - if (advertise & ADVERTISED_1000baseT_Full) - adv |= ADVERTISE_1000FULL; - if (advertise & ADVERTISED_1000baseT_Half) - adv |= ADVERTISE_1000HALF; - phy_write(phy, MII_CTRL1000, adv); - } - - /* Start/Restart aneg */ - /* on some PHYs (e.g. National DP83843) a write to MII_ADVERTISE - * causes BMCR_RESET to be set on the next read of MII_BMCR, which - * if not checked for causes the PHY to be reset below */ - ctl = mii_spin_reset_complete(phy); - if (ctl < 0) - return ctl; - - ctl |= BMCR_ANENABLE | BMCR_ANRESTART; - phy_write(phy, MII_BMCR, ctl); - - return 0; -} - -static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd) -{ - int ctl; - - phy->autoneg = AUTONEG_DISABLE; - phy->speed = speed; - phy->duplex = fd; - phy->pause = phy->asym_pause = 0; - - /* First reset the PHY */ - mii_reset_phy(phy); - - ctl = phy_read(phy, MII_BMCR); - if (ctl < 0) - return ctl; - ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_ANENABLE | BMCR_SPEED1000); - - /* Select speed & duplex */ - switch (speed) { - case SPEED_10: - break; - case SPEED_100: - ctl |= BMCR_SPEED100; - break; - case SPEED_1000: - ctl |= BMCR_SPEED1000; - break; - default: - return -EINVAL; - } - if (fd == DUPLEX_FULL) - ctl |= BMCR_FULLDPLX; - phy_write(phy, MII_BMCR, ctl); - - return 0; -} - -static int genmii_poll_link(struct mii_phy *phy) -{ - int status; - - /* Clear latched value with dummy read */ - phy_read(phy, MII_BMSR); - status = phy_read(phy, MII_BMSR); - if (status < 0 || (status & BMSR_LSTATUS) == 0) - return 0; - if (phy->autoneg == AUTONEG_ENABLE && !(status & BMSR_ANEGCOMPLETE)) - return 0; - return 1; -} - -static int genmii_read_link(struct mii_phy *phy) -{ - if (phy->autoneg == AUTONEG_ENABLE) { - int glpa = 0; - int lpa = phy_read(phy, MII_LPA) & phy_read(phy, MII_ADVERTISE); - if (lpa < 0) - return lpa; - - if (phy->features & - (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) { - int adv = phy_read(phy, MII_CTRL1000); - glpa = phy_read(phy, MII_STAT1000); - - if (glpa < 0 || adv < 0) - return adv; - - glpa &= adv << 2; - } - - phy->speed = SPEED_10; - phy->duplex = DUPLEX_HALF; - phy->pause = phy->asym_pause = 0; - - if (glpa & (LPA_1000FULL | LPA_1000HALF)) { - phy->speed = SPEED_1000; - if (glpa & LPA_1000FULL) - phy->duplex = DUPLEX_FULL; - } else if (lpa & (LPA_100FULL | LPA_100HALF)) { - phy->speed = SPEED_100; - if (lpa & LPA_100FULL) - phy->duplex = DUPLEX_FULL; - } else if (lpa & LPA_10FULL) - phy->duplex = DUPLEX_FULL; - - if (phy->duplex == DUPLEX_FULL) { - phy->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; - phy->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; - } - } else { - int bmcr = phy_read(phy, MII_BMCR); - if (bmcr < 0) - return bmcr; - - if (bmcr & BMCR_FULLDPLX) - phy->duplex = DUPLEX_FULL; - else - phy->duplex = DUPLEX_HALF; - if (bmcr & BMCR_SPEED1000) - phy->speed = SPEED_1000; - else if (bmcr & BMCR_SPEED100) - phy->speed = SPEED_100; - else - phy->speed = SPEED_10; - - phy->pause = phy->asym_pause = 0; - } - return 0; -} - -/* Generic implementation for most 10/100/1000 PHYs */ -static struct mii_phy_ops generic_phy_ops = { - .setup_aneg = genmii_setup_aneg, - .setup_forced = genmii_setup_forced, - .poll_link = genmii_poll_link, - .read_link = genmii_read_link -}; - -static struct mii_phy_def genmii_phy_def = { - .phy_id = 0x00000000, - .phy_id_mask = 0x00000000, - .name = "Generic MII", - .ops = &generic_phy_ops -}; - -/* CIS8201 */ -#define MII_CIS8201_10BTCSR 0x16 -#define TENBTCSR_ECHO_DISABLE 0x2000 -#define MII_CIS8201_EPCR 0x17 -#define EPCR_MODE_MASK 0x3000 -#define EPCR_GMII_MODE 0x0000 -#define EPCR_RGMII_MODE 0x1000 -#define EPCR_TBI_MODE 0x2000 -#define EPCR_RTBI_MODE 0x3000 -#define MII_CIS8201_ACSR 0x1c -#define ACSR_PIN_PRIO_SELECT 0x0004 - -static int cis8201_init(struct mii_phy *phy) -{ - int epcr; - - epcr = phy_read(phy, MII_CIS8201_EPCR); - if (epcr < 0) - return epcr; - - epcr &= ~EPCR_MODE_MASK; - - switch (phy->mode) { - case PHY_MODE_TBI: - epcr |= EPCR_TBI_MODE; - break; - case PHY_MODE_RTBI: - epcr |= EPCR_RTBI_MODE; - break; - case PHY_MODE_GMII: - epcr |= EPCR_GMII_MODE; - break; - case PHY_MODE_RGMII: - default: - epcr |= EPCR_RGMII_MODE; - } - - phy_write(phy, MII_CIS8201_EPCR, epcr); - - /* MII regs override strap pins */ - phy_write(phy, MII_CIS8201_ACSR, - phy_read(phy, MII_CIS8201_ACSR) | ACSR_PIN_PRIO_SELECT); - - /* Disable TX_EN -> CRS echo mode, otherwise 10/HDX doesn't work */ - phy_write(phy, MII_CIS8201_10BTCSR, - phy_read(phy, MII_CIS8201_10BTCSR) | TENBTCSR_ECHO_DISABLE); - - return 0; -} - -static struct mii_phy_ops cis8201_phy_ops = { - .init = cis8201_init, - .setup_aneg = genmii_setup_aneg, - .setup_forced = genmii_setup_forced, - .poll_link = genmii_poll_link, - .read_link = genmii_read_link -}; - -static struct mii_phy_def cis8201_phy_def = { - .phy_id = 0x000fc410, - .phy_id_mask = 0x000ffff0, - .name = "CIS8201 Gigabit Ethernet", - .ops = &cis8201_phy_ops -}; - -static struct mii_phy_def *mii_phy_table[] = { - &cis8201_phy_def, - &genmii_phy_def, - NULL -}; - -int mii_phy_probe(struct mii_phy *phy, int address) -{ - struct mii_phy_def *def; - int i; - int id; - - phy->autoneg = AUTONEG_DISABLE; - phy->advertising = 0; - phy->address = address; - phy->speed = SPEED_10; - phy->duplex = DUPLEX_HALF; - phy->pause = phy->asym_pause = 0; - - /* Take PHY out of isolate mode and reset it. */ - if (mii_reset_phy(phy)) - return -ENODEV; - - /* Read ID and find matching entry */ - id = (phy_read(phy, MII_PHYSID1) << 16) | phy_read(phy, MII_PHYSID2); - if (id < 0) - return -ENODEV; - for (i = 0; (def = mii_phy_table[i]) != NULL; i++) - if ((id & def->phy_id_mask) == def->phy_id) - break; - /* Should never be NULL (we have a generic entry), but... */ - if (!def) - return -ENODEV; - - phy->def = def; - - /* Determine PHY features if needed */ - phy->features = def->features; - if (!phy->features) { - u16 bmsr = phy_read(phy, MII_BMSR); - if (bmsr & BMSR_ANEGCAPABLE) - phy->features |= SUPPORTED_Autoneg; - if (bmsr & BMSR_10HALF) - phy->features |= SUPPORTED_10baseT_Half; - if (bmsr & BMSR_10FULL) - phy->features |= SUPPORTED_10baseT_Full; - if (bmsr & BMSR_100HALF) - phy->features |= SUPPORTED_100baseT_Half; - if (bmsr & BMSR_100FULL) - phy->features |= SUPPORTED_100baseT_Full; - if (bmsr & BMSR_ESTATEN) { - u16 esr = phy_read(phy, MII_ESTATUS); - if (esr & ESTATUS_1000_TFULL) - phy->features |= SUPPORTED_1000baseT_Full; - if (esr & ESTATUS_1000_THALF) - phy->features |= SUPPORTED_1000baseT_Half; - } - phy->features |= SUPPORTED_MII; - } - - /* Setup default advertising */ - phy->advertising = phy->features; - - return 0; -} - -MODULE_LICENSE("GPL"); |