/* * drivers/net/ibm_newemac/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 * * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. * <benh@kernel.crashing.org> * * Based on the arch/ppc version of the driver: * * (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 "emac.h" #include "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); } static inline int gpcs_phy_read(struct mii_phy *phy, int reg) { return phy->mdio_read(phy->dev, phy->gpcs_address, reg); } static inline void gpcs_phy_write(struct mii_phy *phy, int reg, int val) { phy->mdio_write(phy->dev, phy->gpcs_address, reg, val); } int emac_mii_reset_phy(struct mii_phy *phy) { int val; int limit = 10000; val = phy_read(phy, MII_BMCR); val &= ~(BMCR_ISOLATE | BMCR_ANENABLE); val |= BMCR_RESET; phy_write(phy, MII_BMCR, val); udelay(300); while (--limit) { val = phy_read(phy, MII_BMCR); if (val >= 0 && (val & BMCR_RESET) == 0) break; udelay(10); } if ((val & BMCR_ISOLATE) && limit > 0) phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE); return limit <= 0; } int emac_mii_reset_gpcs(struct mii_phy *phy) { int val; int limit = 10000; val = gpcs_phy_read(phy, MII_BMCR); val &= ~(BMCR_ISOLATE | BMCR_ANENABLE); val |= BMCR_RESET; gpcs_phy_write(phy, MII_BMCR, val); udelay(300); while (--limit) { val = gpcs_phy_read(phy, MII_BMCR); if (val >= 0 && (val & BMCR_RESET) == 0) break; udelay(10); } if ((val & BMCR_ISOLATE) && limit > 0) gpcs_phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE); if (limit > 0 && phy->mode == PHY_MODE_SGMII) { /* Configure GPCS interface to recommended setting for SGMII */ gpcs_phy_write(phy, 0x04, 0x8120); /* AsymPause, FDX */ gpcs_phy_write(phy, 0x07, 0x2801); /* msg_pg, toggle */ gpcs_phy_write(phy, 0x00, 0x0140); /* 1Gbps, FDX */ } return limit <= 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; ctl = phy_read(phy, MII_BMCR); if (ctl < 0) return ctl; ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE); /* First clear the PHY */ phy_write(phy, MII_BMCR, ctl); /* 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 */ ctl = phy_read(phy, MII_BMCR); 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; ctl = phy_read(phy, MII_BMCR); if (ctl < 0) return ctl; ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE); /* First clear the PHY */ phy_write(phy, MII_BMCR, ctl | BMCR_RESET); /* 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 bcm5248_phy_def = { .phy_id = 0x0143bc00, .phy_id_mask = 0x0ffffff0, .name = "BCM5248 10/100 SMII Ethernet", .ops = &generic_phy_ops }; static int m88e1111_init(struct mii_phy *phy) { pr_debug("%s: Marvell 88E1111 Ethernet\n", __func__); phy_write(phy, 0x14, 0x0ce3); phy_write(phy, 0x18, 0x4101); phy_write(phy, 0x09, 0x0e00); phy_write(phy, 0x04, 0x01e1); phy_write(phy, 0x00, 0x9140); phy_write(phy, 0x00, 0x1140); return 0; } static int m88e1112_init(struct mii_phy *phy) { /* * Marvell 88E1112 PHY needs to have the SGMII MAC * interace (page 2) properly configured to * communicate with the 460EX/GT GPCS interface. */ u16 reg_short; pr_debug("%s: Marvell 88E1112 Ethernet\n", __func__); /* Set access to Page 2 */ phy_write(phy, 0x16, 0x0002); phy_write(phy, 0x00, 0x0040); /* 1Gbps */ reg_short = (u16)(phy_read(phy, 0x1a)); reg_short |= 0x8000; /* bypass Auto-Negotiation */ phy_write(phy, 0x1a, reg_short); emac_mii_reset_phy(phy); /* reset MAC interface */ /* Reset access to Page 0 */ phy_write(phy, 0x16, 0x0000); return 0; } static int et1011c_init(struct mii_phy *phy) { u16 reg_short; reg_short = (u16)(phy_read(phy, 0x16)); reg_short &= ~(0x7); reg_short |= 0x6; /* RGMII Trace Delay*/ phy_write(phy, 0x16, reg_short); reg_short = (u16)(phy_read(phy, 0x17)); reg_short &= ~(0x40); phy_write(phy, 0x17, reg_short); phy_write(phy, 0x1c, 0x74f0); return 0; } static struct mii_phy_ops et1011c_phy_ops = { .init = et1011c_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 et1011c_phy_def = { .phy_id = 0x0282f000, .phy_id_mask = 0x0fffff00, .name = "ET1011C Gigabit Ethernet", .ops = &et1011c_phy_ops }; static struct mii_phy_ops m88e1111_phy_ops = { .init = m88e1111_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 m88e1111_phy_def = { .phy_id = 0x01410CC0, .phy_id_mask = 0x0ffffff0, .name = "Marvell 88E1111 Ethernet", .ops = &m88e1111_phy_ops, }; static struct mii_phy_ops m88e1112_phy_ops = { .init = m88e1112_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 m88e1112_phy_def = { .phy_id = 0x01410C90, .phy_id_mask = 0x0ffffff0, .name = "Marvell 88E1112 Ethernet", .ops = &m88e1112_phy_ops, }; static struct mii_phy_def *mii_phy_table[] = { &et1011c_phy_def, &cis8201_phy_def, &bcm5248_phy_def, &m88e1111_phy_def, &m88e1112_phy_def, &genmii_phy_def, NULL }; int emac_mii_phy_probe(struct mii_phy *phy, int address) { struct mii_phy_def *def; int i; u32 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 (emac_mii_reset_phy(phy)) return -ENODEV; /* Read ID and find matching entry */ id = (phy_read(phy, MII_PHYSID1) << 16) | phy_read(phy, MII_PHYSID2); 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");