diff options
Diffstat (limited to 'drivers/net/phy/broadcom.c')
| -rw-r--r-- | drivers/net/phy/broadcom.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c new file mode 100644 index 000000000..427ac6013 --- /dev/null +++ b/drivers/net/phy/broadcom.c @@ -0,0 +1,288 @@ +/* + * Broadcom PHY drivers + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * Copyright 2010-2011 Freescale Semiconductor, Inc. + * author Andy Fleming + * + */ +#include <config.h> +#include <common.h> +#include <phy.h> + +/* Broadcom BCM54xx -- taken from linux sungem_phy */ +#define MIIM_BCM54xx_AUXCNTL 0x18 +#define MIIM_BCM54xx_AUXCNTL_ENCODE(val) (((val & 0x7) << 12)|(val & 0x7)) +#define MIIM_BCM54xx_AUXSTATUS 0x19 +#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK 0x0700 +#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT 8 + +#define MIIM_BCM54XX_SHD 0x1c +#define MIIM_BCM54XX_SHD_WRITE 0x8000 +#define MIIM_BCM54XX_SHD_VAL(x) ((x & 0x1f) << 10) +#define MIIM_BCM54XX_SHD_DATA(x) ((x & 0x3ff) << 0) +#define MIIM_BCM54XX_SHD_WR_ENCODE(val, data) \ + (MIIM_BCM54XX_SHD_WRITE | MIIM_BCM54XX_SHD_VAL(val) | \ + MIIM_BCM54XX_SHD_DATA(data)) + +#define MIIM_BCM54XX_EXP_DATA 0x15 /* Expansion register data */ +#define MIIM_BCM54XX_EXP_SEL 0x17 /* Expansion register select */ +#define MIIM_BCM54XX_EXP_SEL_SSD 0x0e00 /* Secondary SerDes select */ +#define MIIM_BCM54XX_EXP_SEL_ER 0x0f00 /* Expansion register select */ + +/* Broadcom BCM5461S */ +static int bcm5461_config(struct phy_device *phydev) +{ + genphy_config_aneg(phydev); + + phy_reset(phydev); + + return 0; +} + +static int bcm54xx_parse_status(struct phy_device *phydev) +{ + unsigned int mii_reg; + + mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXSTATUS); + + switch ((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >> + MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT) { + case 1: + phydev->duplex = DUPLEX_HALF; + phydev->speed = SPEED_10; + break; + case 2: + phydev->duplex = DUPLEX_FULL; + phydev->speed = SPEED_10; + break; + case 3: + phydev->duplex = DUPLEX_HALF; + phydev->speed = SPEED_100; + break; + case 5: + phydev->duplex = DUPLEX_FULL; + phydev->speed = SPEED_100; + break; + case 6: + phydev->duplex = DUPLEX_HALF; + phydev->speed = SPEED_1000; + break; + case 7: + phydev->duplex = DUPLEX_FULL; + phydev->speed = SPEED_1000; + break; + default: + printf("Auto-neg error, defaulting to 10BT/HD\n"); + phydev->duplex = DUPLEX_HALF; + phydev->speed = SPEED_10; + break; + } + + return 0; +} + +static int bcm54xx_startup(struct phy_device *phydev) +{ + /* Read the Status (2x to make sure link is right) */ + genphy_update_link(phydev); + bcm54xx_parse_status(phydev); + + return 0; +} + +/* Broadcom BCM5482S */ +/* + * "Ethernet@Wirespeed" needs to be enabled to achieve link in certain + * circumstances. eg a gigabit TSEC connected to a gigabit switch with + * a 4-wire ethernet cable. Both ends advertise gigabit, but can't + * link. "Ethernet@Wirespeed" reduces advertised speed until link + * can be achieved. + */ +static u32 bcm5482_read_wirespeed(struct phy_device *phydev, u32 reg) +{ + return (phy_read(phydev, MDIO_DEVAD_NONE, reg) & 0x8FFF) | 0x8010; +} + +static int bcm5482_config(struct phy_device *phydev) +{ + unsigned int reg; + + /* reset the PHY */ + reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR); + reg |= BMCR_RESET; + phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, reg); + + /* Setup read from auxilary control shadow register 7 */ + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, + MIIM_BCM54xx_AUXCNTL_ENCODE(7)); + /* Read Misc Control register and or in Ethernet@Wirespeed */ + reg = bcm5482_read_wirespeed(phydev, MIIM_BCM54xx_AUXCNTL); + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg); + + /* Initial config/enable of secondary SerDes interface */ + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD, + MIIM_BCM54XX_SHD_WR_ENCODE(0x14, 0xf)); + /* Write intial value to secondary SerDes Contol */ + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL, + MIIM_BCM54XX_EXP_SEL_SSD | 0); + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA, + BMCR_ANRESTART); + /* Enable copper/fiber auto-detect */ + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD, + MIIM_BCM54XX_SHD_WR_ENCODE(0x1e, 0x201)); + + genphy_config_aneg(phydev); + + return 0; +} + +/* + * Find out if PHY is in copper or serdes mode by looking at Expansion Reg + * 0x42 - "Operating Mode Status Register" + */ +static int bcm5482_is_serdes(struct phy_device *phydev) +{ + u16 val; + int serdes = 0; + + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL, + MIIM_BCM54XX_EXP_SEL_ER | 0x42); + val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA); + + switch (val & 0x1f) { + case 0x0d: /* RGMII-to-100Base-FX */ + case 0x0e: /* RGMII-to-SGMII */ + case 0x0f: /* RGMII-to-SerDes */ + case 0x12: /* SGMII-to-SerDes */ + case 0x13: /* SGMII-to-100Base-FX */ + case 0x16: /* SerDes-to-Serdes */ + serdes = 1; + break; + case 0x6: /* RGMII-to-Copper */ + case 0x14: /* SGMII-to-Copper */ + case 0x17: /* SerDes-to-Copper */ + break; + default: + printf("ERROR, invalid PHY mode (0x%x\n)", val); + break; + } + + return serdes; +} + +/* + * Determine SerDes link speed and duplex from Expansion reg 0x42 "Operating + * Mode Status Register" + */ +static u32 bcm5482_parse_serdes_sr(struct phy_device *phydev) +{ + u16 val; + int i = 0; + + /* Wait 1s for link - Clause 37 autonegotiation happens very fast */ + while (1) { + phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL, + MIIM_BCM54XX_EXP_SEL_ER | 0x42); + val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA); + + if (val & 0x8000) + break; + + if (i++ > 1000) { + phydev->link = 0; + return 1; + } + + udelay(1000); /* 1 ms */ + } + + phydev->link = 1; + switch ((val >> 13) & 0x3) { + case (0x00): + phydev->speed = 10; + break; + case (0x01): + phydev->speed = 100; + break; + case (0x02): + phydev->speed = 1000; + break; + } + + phydev->duplex = (val & 0x1000) == 0x1000; + + return 0; +} + +/* + * Figure out if BCM5482 is in serdes or copper mode and determine link + * configuration accordingly + */ +static int bcm5482_startup(struct phy_device *phydev) +{ + if (bcm5482_is_serdes(phydev)) { + bcm5482_parse_serdes_sr(phydev); + phydev->port = PORT_FIBRE; + } else { + /* Wait for auto-negotiation to complete or fail */ + genphy_update_link(phydev); + /* Parse BCM54xx copper aux status register */ + bcm54xx_parse_status(phydev); + } + + return 0; +} + +static struct phy_driver BCM5461S_driver = { + .name = "Broadcom BCM5461S", + .uid = 0x2060c0, + .mask = 0xfffff0, + .features = PHY_GBIT_FEATURES, + .config = &bcm5461_config, + .startup = &bcm54xx_startup, + .shutdown = &genphy_shutdown, +}; + +static struct phy_driver BCM5464S_driver = { + .name = "Broadcom BCM5464S", + .uid = 0x2060b0, + .mask = 0xfffff0, + .features = PHY_GBIT_FEATURES, + .config = &bcm5461_config, + .startup = &bcm54xx_startup, + .shutdown = &genphy_shutdown, +}; + +static struct phy_driver BCM5482S_driver = { + .name = "Broadcom BCM5482S", + .uid = 0x143bcb0, + .mask = 0xffffff0, + .features = PHY_GBIT_FEATURES, + .config = &bcm5482_config, + .startup = &bcm5482_startup, + .shutdown = &genphy_shutdown, +}; + +int phy_broadcom_init(void) +{ + phy_register(&BCM5482S_driver); + phy_register(&BCM5464S_driver); + phy_register(&BCM5461S_driver); + + return 0; +} |