diff options
Diffstat (limited to 'drivers/net/fm/memac_phy.c')
| -rw-r--r-- | drivers/net/fm/memac_phy.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/net/fm/memac_phy.c b/drivers/net/fm/memac_phy.c new file mode 100644 index 0000000..ea6118b --- /dev/null +++ b/drivers/net/fm/memac_phy.c @@ -0,0 +1,150 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * Andy Fleming <afleming@freescale.com> + * Roy Zang <tie-fei.zang@freescale.com> + * + * 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 + * Some part is taken from tsec.c + */ +#include <common.h> +#include <miiphy.h> +#include <phy.h> +#include <asm/io.h> +#include <asm/fsl_memac.h> +#include <fm_eth.h> + +/* + * Write value to the PHY for this device to the register at regnum, waiting + * until the write is done before it returns. All PHY configuration has to be + * done through the TSEC1 MIIM regs + */ +int memac_mdio_write(struct mii_dev *bus, int port_addr, int dev_addr, + int regnum, u16 value) +{ + u32 mdio_ctl; + struct memac_mdio_controller *regs = bus->priv; + u32 c45 = 1; /* Default to 10G interface */ + + if (dev_addr == MDIO_DEVAD_NONE) { + c45 = 0; /* clause 22 */ + dev_addr = regnum & 0x1f; + clrbits_be32(®s->mdio_stat, MDIO_STAT_ENC); + } else { + setbits_be32(®s->mdio_stat, MDIO_STAT_ENC); + setbits_be32(®s->mdio_stat, MDIO_STAT_HOLD_15_CLK); + } + + /* Wait till the bus is free */ + while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY) + ; + + /* Set the port and dev addr */ + mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr); + out_be32(®s->mdio_ctl, mdio_ctl); + + /* Set the register address */ + if (c45) + out_be32(®s->mdio_addr, regnum & 0xffff); + + /* Wait till the bus is free */ + while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY) + ; + + /* Write the value to the register */ + out_be32(®s->mdio_data, MDIO_DATA(value)); + + /* Wait till the MDIO write is complete */ + while ((in_be32(®s->mdio_data)) & MDIO_DATA_BSY) + ; + + return 0; +} + +/* + * Reads from register regnum in the PHY for device dev, returning the value. + * Clears miimcom first. All PHY configuration has to be done through the + * TSEC1 MIIM regs + */ +int memac_mdio_read(struct mii_dev *bus, int port_addr, int dev_addr, + int regnum) +{ + u32 mdio_ctl; + struct memac_mdio_controller *regs = bus->priv; + u32 c45 = 1; + + if (dev_addr == MDIO_DEVAD_NONE) { + c45 = 0; /* clause 22 */ + dev_addr = regnum & 0x1f; + clrbits_be32(®s->mdio_stat, MDIO_STAT_ENC); + } else { + setbits_be32(®s->mdio_stat, MDIO_STAT_ENC); + setbits_be32(®s->mdio_stat, MDIO_STAT_HOLD_15_CLK); + } + + /* Wait till the bus is free */ + while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY) + ; + + /* Set the Port and Device Addrs */ + mdio_ctl = MDIO_CTL_PORT_ADDR(port_addr) | MDIO_CTL_DEV_ADDR(dev_addr); + out_be32(®s->mdio_ctl, mdio_ctl); + + /* Set the register address */ + if (c45) + out_be32(®s->mdio_addr, regnum & 0xffff); + + /* Wait till the bus is free */ + while ((in_be32(®s->mdio_stat)) & MDIO_STAT_BSY) + ; + + /* Initiate the read */ + mdio_ctl |= MDIO_CTL_READ; + out_be32(®s->mdio_ctl, mdio_ctl); + + /* Wait till the MDIO write is complete */ + while ((in_be32(®s->mdio_data)) & MDIO_DATA_BSY) + ; + + /* Return all Fs if nothing was there */ + if (in_be32(®s->mdio_stat) & MDIO_STAT_RD_ER) + return 0xffff; + + return in_be32(®s->mdio_data) & 0xffff; +} + +int memac_mdio_reset(struct mii_dev *bus) +{ + return 0; +} + +int fm_memac_mdio_init(bd_t *bis, struct memac_mdio_info *info) +{ + struct mii_dev *bus = mdio_alloc(); + + if (!bus) { + printf("Failed to allocate FM TGEC MDIO bus\n"); + return -1; + } + + bus->read = memac_mdio_read; + bus->write = memac_mdio_write; + bus->reset = memac_mdio_reset; + sprintf(bus->name, info->name); + + bus->priv = info->regs; + + return mdio_register(bus); +} |