1/*- 2 * Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: releng/10.3/sys/mips/cavium/octe/ethernet-mv88e61xx.c 213762 2010-10-13 09:17:44Z jmallett $ 27 */ 28 29/* 30 * Interface to the Marvell 88E61XX SMI/MDIO. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: releng/10.3/sys/mips/cavium/octe/ethernet-mv88e61xx.c 213762 2010-10-13 09:17:44Z jmallett $"); 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/bus.h> 39#include <sys/endian.h> 40#include <sys/kernel.h> 41#include <sys/mbuf.h> 42#include <sys/socket.h> 43 44#include <dev/mii/mii.h> 45 46#include <net/ethernet.h> 47#include <net/if.h> 48 49#include "wrapper-cvmx-includes.h" 50#include "ethernet-headers.h" 51 52#define MV88E61XX_SMI_REG_CMD 0x00 /* Indirect command register. */ 53#define MV88E61XX_SMI_CMD_BUSY 0x8000 /* Busy bit. */ 54#define MV88E61XX_SMI_CMD_22 0x1000 /* Clause 22 (default 45.) */ 55#define MV88E61XX_SMI_CMD_READ 0x0800 /* Read command. */ 56#define MV88E61XX_SMI_CMD_WRITE 0x0400 /* Write command. */ 57#define MV88E61XX_SMI_CMD_PHY(phy) (((phy) & 0x1f) << 5) 58#define MV88E61XX_SMI_CMD_REG(reg) ((reg) & 0x1f) 59 60#define MV88E61XX_SMI_REG_DAT 0x01 /* Indirect data register. */ 61 62static int cvm_oct_mv88e61xx_smi_read(struct ifnet *, int, int); 63static void cvm_oct_mv88e61xx_smi_write(struct ifnet *, int, int, int); 64static int cvm_oct_mv88e61xx_smi_wait(struct ifnet *); 65 66int 67cvm_oct_mv88e61xx_setup_device(struct ifnet *ifp) 68{ 69 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 70 71 priv->mdio_read = cvm_oct_mv88e61xx_smi_read; 72 priv->mdio_write = cvm_oct_mv88e61xx_smi_write; 73 priv->phy_device = "mv88e61xxphy"; 74 75 return (0); 76} 77 78static int 79cvm_oct_mv88e61xx_smi_read(struct ifnet *ifp, int phy_id, int location) 80{ 81 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 82 int error; 83 84 error = cvm_oct_mv88e61xx_smi_wait(ifp); 85 if (error != 0) 86 return (0); 87 88 cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD, 89 MV88E61XX_SMI_CMD_BUSY | MV88E61XX_SMI_CMD_22 | 90 MV88E61XX_SMI_CMD_READ | MV88E61XX_SMI_CMD_PHY(phy_id) | 91 MV88E61XX_SMI_CMD_REG(location)); 92 93 error = cvm_oct_mv88e61xx_smi_wait(ifp); 94 if (error != 0) 95 return (0); 96 97 return (cvm_oct_mdio_read(ifp, priv->phy_id, MV88E61XX_SMI_REG_DAT)); 98} 99 100static void 101cvm_oct_mv88e61xx_smi_write(struct ifnet *ifp, int phy_id, int location, int val) 102{ 103 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 104 105 cvm_oct_mv88e61xx_smi_wait(ifp); 106 cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_DAT, val); 107 cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD, 108 MV88E61XX_SMI_CMD_BUSY | MV88E61XX_SMI_CMD_22 | 109 MV88E61XX_SMI_CMD_WRITE | MV88E61XX_SMI_CMD_PHY(phy_id) | 110 MV88E61XX_SMI_CMD_REG(location)); 111 cvm_oct_mv88e61xx_smi_wait(ifp); 112} 113 114static int 115cvm_oct_mv88e61xx_smi_wait(struct ifnet *ifp) 116{ 117 cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc; 118 uint16_t cmd; 119 unsigned i; 120 121 for (i = 0; i < 10000; i++) { 122 cmd = cvm_oct_mdio_read(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD); 123 if ((cmd & MV88E61XX_SMI_CMD_BUSY) == 0) 124 return (0); 125 } 126 return (ETIMEDOUT); 127} 128