1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31/* 32 * Interface to the Marvell 88E61XX SMI/MDIO. 33 */ 34 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD$"); 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/bus.h> 41#include <sys/endian.h> 42#include <sys/kernel.h> 43#include <sys/mbuf.h> 44#include <sys/socket.h> 45 46#include <dev/mii/mii.h> 47 48#include <net/ethernet.h> 49#include <net/if.h> 50#include <net/if_var.h> 51 52#include "wrapper-cvmx-includes.h" 53#include "ethernet-headers.h" 54 55#define MV88E61XX_SMI_REG_CMD 0x00 /* Indirect command register. */ 56#define MV88E61XX_SMI_CMD_BUSY 0x8000 /* Busy bit. */ 57#define MV88E61XX_SMI_CMD_22 0x1000 /* Clause 22 (default 45.) */ 58#define MV88E61XX_SMI_CMD_READ 0x0800 /* Read command. */ 59#define MV88E61XX_SMI_CMD_WRITE 0x0400 /* Write command. */ 60#define MV88E61XX_SMI_CMD_PHY(phy) (((phy) & 0x1f) << 5) 61#define MV88E61XX_SMI_CMD_REG(reg) ((reg) & 0x1f) 62 63#define MV88E61XX_SMI_REG_DAT 0x01 /* Indirect data register. */ 64 65static int cvm_oct_mv88e61xx_smi_read(struct ifnet *, int, int); 66static void cvm_oct_mv88e61xx_smi_write(struct ifnet *, int, int, int); 67static int cvm_oct_mv88e61xx_smi_wait(struct ifnet *); 68 69int 70cvm_oct_mv88e61xx_setup_device(struct ifnet *ifp) 71{ 72 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 73 74 priv->mdio_read = cvm_oct_mv88e61xx_smi_read; 75 priv->mdio_write = cvm_oct_mv88e61xx_smi_write; 76 priv->phy_device = "mv88e61xxphy"; 77 78 return (0); 79} 80 81static int 82cvm_oct_mv88e61xx_smi_read(struct ifnet *ifp, int phy_id, int location) 83{ 84 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 85 int error; 86 87 error = cvm_oct_mv88e61xx_smi_wait(ifp); 88 if (error != 0) 89 return (0); 90 91 cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD, 92 MV88E61XX_SMI_CMD_BUSY | MV88E61XX_SMI_CMD_22 | 93 MV88E61XX_SMI_CMD_READ | MV88E61XX_SMI_CMD_PHY(phy_id) | 94 MV88E61XX_SMI_CMD_REG(location)); 95 96 error = cvm_oct_mv88e61xx_smi_wait(ifp); 97 if (error != 0) 98 return (0); 99 100 return (cvm_oct_mdio_read(ifp, priv->phy_id, MV88E61XX_SMI_REG_DAT)); 101} 102 103static void 104cvm_oct_mv88e61xx_smi_write(struct ifnet *ifp, int phy_id, int location, int val) 105{ 106 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 107 108 cvm_oct_mv88e61xx_smi_wait(ifp); 109 cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_DAT, val); 110 cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD, 111 MV88E61XX_SMI_CMD_BUSY | MV88E61XX_SMI_CMD_22 | 112 MV88E61XX_SMI_CMD_WRITE | MV88E61XX_SMI_CMD_PHY(phy_id) | 113 MV88E61XX_SMI_CMD_REG(location)); 114 cvm_oct_mv88e61xx_smi_wait(ifp); 115} 116 117static int 118cvm_oct_mv88e61xx_smi_wait(struct ifnet *ifp) 119{ 120 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 121 uint16_t cmd; 122 unsigned i; 123 124 for (i = 0; i < 10000; i++) { 125 cmd = cvm_oct_mdio_read(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD); 126 if ((cmd & MV88E61XX_SMI_CMD_BUSY) == 0) 127 return (0); 128 } 129 return (ETIMEDOUT); 130} 131