micphy.c revision 275676
1273380Sbr/*- 2273380Sbr * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3273380Sbr * All rights reserved. 4273380Sbr * 5273380Sbr * This software was developed by SRI International and the University of 6273380Sbr * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7273380Sbr * ("CTSRD"), as part of the DARPA CRASH research programme. 8273380Sbr * 9273380Sbr * Redistribution and use in source and binary forms, with or without 10273380Sbr * modification, are permitted provided that the following conditions 11273380Sbr * are met: 12273380Sbr * 1. Redistributions of source code must retain the above copyright 13273380Sbr * notice, this list of conditions and the following disclaimer. 14273380Sbr * 2. Redistributions in binary form must reproduce the above copyright 15273380Sbr * notice, this list of conditions and the following disclaimer in the 16273380Sbr * documentation and/or other materials provided with the distribution. 17273380Sbr * 18273380Sbr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19273380Sbr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20273380Sbr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21273380Sbr * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22273380Sbr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23273380Sbr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24273380Sbr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25273380Sbr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26273380Sbr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27273380Sbr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28273380Sbr * SUCH DAMAGE. 29273380Sbr */ 30273380Sbr 31273380Sbr#include <sys/cdefs.h> 32273380Sbr__FBSDID("$FreeBSD: head/sys/dev/mii/micphy.c 275676 2014-12-10 11:35:10Z br $"); 33273380Sbr 34273380Sbr/* 35273380Sbr * Micrel KSZ9021 Gigabit Ethernet Transceiver 36273380Sbr */ 37273380Sbr 38273380Sbr#include <sys/param.h> 39273380Sbr#include <sys/systm.h> 40273380Sbr#include <sys/kernel.h> 41273380Sbr#include <sys/socket.h> 42273380Sbr#include <sys/errno.h> 43273380Sbr#include <sys/module.h> 44273380Sbr#include <sys/bus.h> 45273380Sbr#include <sys/malloc.h> 46273380Sbr 47273380Sbr#include <machine/bus.h> 48273380Sbr 49273380Sbr#include <net/if.h> 50273380Sbr#include <net/if_media.h> 51273380Sbr 52273380Sbr#include <dev/mii/mii.h> 53273380Sbr#include <dev/mii/miivar.h> 54273380Sbr#include "miidevs.h" 55273380Sbr 56273380Sbr#include "miibus_if.h" 57273380Sbr 58273380Sbr#include <dev/fdt/fdt_common.h> 59273380Sbr#include <dev/ofw/openfirm.h> 60273380Sbr#include <dev/ofw/ofw_bus.h> 61273380Sbr#include <dev/ofw/ofw_bus_subr.h> 62273380Sbr 63273380Sbr#define MII_KSZPHY_EXTREG 0x0b 64273380Sbr#define KSZPHY_EXTREG_WRITE (1 << 15) 65273380Sbr#define MII_KSZPHY_EXTREG_WRITE 0x0c 66273380Sbr#define MII_KSZPHY_EXTREG_READ 0x0d 67273380Sbr#define MII_KSZPHY_CLK_CONTROL_PAD_SKEW 0x104 68273380Sbr#define MII_KSZPHY_RX_DATA_PAD_SKEW 0x105 69273380Sbr#define MII_KSZPHY_TX_DATA_PAD_SKEW 0x106 70273380Sbr 71275676Sbr#define PS_TO_REG(p) ((p) / 200) 72273380Sbr 73273380Sbrstatic int micphy_probe(device_t); 74273380Sbrstatic int micphy_attach(device_t); 75273380Sbrstatic int micphy_service(struct mii_softc *, struct mii_data *, int); 76273380Sbr 77273380Sbrstatic device_method_t micphy_methods[] = { 78273380Sbr /* device interface */ 79273380Sbr DEVMETHOD(device_probe, micphy_probe), 80273380Sbr DEVMETHOD(device_attach, micphy_attach), 81273380Sbr DEVMETHOD(device_detach, mii_phy_detach), 82273380Sbr DEVMETHOD(device_shutdown, bus_generic_shutdown), 83273380Sbr DEVMETHOD_END 84273380Sbr}; 85273380Sbr 86273380Sbrstatic devclass_t micphy_devclass; 87273380Sbr 88273380Sbrstatic driver_t micphy_driver = { 89273380Sbr "micphy", 90273380Sbr micphy_methods, 91273380Sbr sizeof(struct mii_softc) 92273380Sbr}; 93273380Sbr 94273380SbrDRIVER_MODULE(micphy, miibus, micphy_driver, micphy_devclass, 0, 0); 95273380Sbr 96273380Sbrstatic const struct mii_phydesc micphys[] = { 97273380Sbr MII_PHY_DESC(MICREL, KSZ9021), 98273380Sbr MII_PHY_END 99273380Sbr}; 100273380Sbr 101273380Sbrstatic const struct mii_phy_funcs micphy_funcs = { 102273380Sbr micphy_service, 103273380Sbr ukphy_status, 104273380Sbr mii_phy_reset 105273380Sbr}; 106273380Sbr 107275676Sbrstatic void 108275676Sbrmicphy_write(struct mii_softc *sc, uint32_t reg, uint32_t val) 109273380Sbr{ 110273380Sbr 111273380Sbr PHY_WRITE(sc, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | reg); 112273380Sbr PHY_WRITE(sc, MII_KSZPHY_EXTREG_WRITE, val); 113273380Sbr} 114273380Sbr 115273380Sbrstatic int 116273380Sbrksz9021_load_values(struct mii_softc *sc, phandle_t node, uint32_t reg, 117273380Sbr char *field1, char *field2, 118273380Sbr char *field3, char *field4) 119273380Sbr{ 120273380Sbr pcell_t dts_value[1]; 121273380Sbr int len; 122273380Sbr int val; 123273380Sbr 124273380Sbr val = 0; 125273380Sbr 126273380Sbr if ((len = OF_getproplen(node, field1)) > 0) { 127273380Sbr OF_getencprop(node, field1, dts_value, len); 128273380Sbr val = PS_TO_REG(dts_value[0]); 129273380Sbr } 130273380Sbr 131273380Sbr if ((len = OF_getproplen(node, field2)) > 0) { 132273380Sbr OF_getencprop(node, field2, dts_value, len); 133273380Sbr val |= PS_TO_REG(dts_value[0]) << 4; 134273380Sbr } 135273380Sbr 136273380Sbr if ((len = OF_getproplen(node, field3)) > 0) { 137273380Sbr OF_getencprop(node, field3, dts_value, len); 138273380Sbr val |= PS_TO_REG(dts_value[0]) << 8; 139273380Sbr } 140273380Sbr 141273380Sbr if ((len = OF_getproplen(node, field4)) > 0) { 142273380Sbr OF_getencprop(node, field4, dts_value, len); 143273380Sbr val |= PS_TO_REG(dts_value[0]) << 12; 144273380Sbr } 145273380Sbr 146273380Sbr micphy_write(sc, reg, val); 147273380Sbr 148273380Sbr return (0); 149273380Sbr} 150273380Sbr 151273380Sbrstatic int 152273380Sbrmicphy_probe(device_t dev) 153273380Sbr{ 154273380Sbr 155273380Sbr return (mii_phy_dev_probe(dev, micphys, BUS_PROBE_DEFAULT)); 156273380Sbr} 157273380Sbr 158273380Sbrstatic int 159273380Sbrmicphy_attach(device_t dev) 160273380Sbr{ 161273380Sbr struct mii_softc *sc; 162273380Sbr phandle_t node; 163273380Sbr device_t miibus; 164273380Sbr device_t parent; 165273380Sbr 166273380Sbr sc = device_get_softc(dev); 167273380Sbr 168273380Sbr mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &micphy_funcs, 1); 169273380Sbr mii_phy_setmedia(sc); 170273380Sbr 171273380Sbr miibus = device_get_parent(dev); 172273380Sbr parent = device_get_parent(miibus); 173273380Sbr 174273380Sbr if ((node = ofw_bus_get_node(parent)) == -1) 175273380Sbr return (ENXIO); 176273380Sbr 177273380Sbr ksz9021_load_values(sc, node, MII_KSZPHY_CLK_CONTROL_PAD_SKEW, 178273380Sbr "txen-skew-ps", "txc-skew-ps", 179273380Sbr "rxdv-skew-ps", "rxc-skew-ps"); 180273380Sbr 181273380Sbr ksz9021_load_values(sc, node, MII_KSZPHY_RX_DATA_PAD_SKEW, 182273380Sbr "rxd0-skew-ps", "rxd1-skew-ps", 183273380Sbr "rxd2-skew-ps", "rxd3-skew-ps"); 184273380Sbr 185273380Sbr ksz9021_load_values(sc, node, MII_KSZPHY_TX_DATA_PAD_SKEW, 186273380Sbr "txd0-skew-ps", "txd1-skew-ps", 187273380Sbr "txd2-skew-ps", "txd3-skew-ps"); 188273380Sbr 189273380Sbr return (0); 190273380Sbr} 191273380Sbr 192273380Sbrstatic int 193273380Sbrmicphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 194273380Sbr{ 195273380Sbr 196273380Sbr switch (cmd) { 197273380Sbr case MII_POLLSTAT: 198273380Sbr break; 199273380Sbr 200273380Sbr case MII_MEDIACHG: 201273380Sbr mii_phy_setmedia(sc); 202273380Sbr break; 203273380Sbr 204273380Sbr case MII_TICK: 205273380Sbr if (mii_phy_tick(sc) == EJUSTRETURN) 206273380Sbr return (0); 207273380Sbr break; 208273380Sbr } 209273380Sbr 210273380Sbr /* Update the media status. */ 211273380Sbr PHY_STATUS(sc); 212273380Sbr 213273380Sbr /* Callback if something changed. */ 214273380Sbr mii_phy_update(sc, cmd); 215273380Sbr return (0); 216273380Sbr} 217