1 /*- 2 * Copyright (c) 2016 Justin Hibbits 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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/bus.h> 34 #include <sys/module.h> 35 #include <sys/mutex.h> 36 #include <sys/resource.h> 37 #include <sys/socket.h> 38 39 #include <machine/bus.h> 40 41 #include <net/if.h> 42 #include <net/if_media.h> 43 #include <net/if_types.h> 44 #include <net/if_var.h> 45 46 #include <dev/mii/mii.h> 47 #include <dev/mii/miivar.h> 48 49 #include <dev/ofw/ofw_bus.h> 50 #include <dev/ofw/ofw_bus_subr.h> 51 52 #include <contrib/ncsw/inc/Peripherals/fm_ext.h> 53 54 #include "fman.h" 55 #include "miibus_if.h" 56 57 #define MDIO_LOCK() mtx_lock(&sc->sc_lock) 58 #define MDIO_UNLOCK() mtx_unlock(&sc->sc_lock) 59 #define MDIO_WRITE4(sc,r,v) \ 60 bus_space_write_4(&bs_be_tag, sc->sc_handle, sc->sc_offset + r, v) 61 #define MDIO_READ4(sc, r) \ 62 bus_space_read_4(&bs_be_tag, sc->sc_handle, sc->sc_offset + r) 63 64 #define MDIO_MIIMCFG 0x0 65 #define MDIO_MIIMCOM 0x4 66 #define MIIMCOM_SCAN_CYCLE 0x00000002 67 #define MIIMCOM_READ_CYCLE 0x00000001 68 #define MDIO_MIIMADD 0x8 69 #define MDIO_MIIMCON 0xc 70 #define MDIO_MIIMSTAT 0x10 71 #define MDIO_MIIMIND 0x14 72 #define MIIMIND_BUSY 0x1 73 74 static int pqmdio_fdt_probe(device_t dev); 75 static int pqmdio_fdt_attach(device_t dev); 76 static int pqmdio_detach(device_t dev); 77 static int pqmdio_miibus_readreg(device_t dev, int phy, int reg); 78 static int pqmdio_miibus_writereg(device_t dev, int phy, int reg, int value); 79 80 struct pqmdio_softc { 81 struct mtx sc_lock; 82 bus_space_handle_t sc_handle; 83 int sc_offset; 84 }; 85 86 static device_method_t pqmdio_methods[] = { 87 /* Device interface */ 88 DEVMETHOD(device_probe, pqmdio_fdt_probe), 89 DEVMETHOD(device_attach, pqmdio_fdt_attach), 90 DEVMETHOD(device_detach, pqmdio_detach), 91 92 /* MII interface */ 93 DEVMETHOD(miibus_readreg, pqmdio_miibus_readreg), 94 DEVMETHOD(miibus_writereg, pqmdio_miibus_writereg), 95 96 { 0, 0 } 97 }; 98 99 static struct ofw_compat_data mdio_compat_data[] = { 100 {"fsl,fman-mdio", 0}, 101 {NULL, 0} 102 }; 103 104 static driver_t pqmdio_driver = { 105 "pq_mdio", 106 pqmdio_methods, 107 sizeof(struct pqmdio_softc), 108 }; 109 110 static int 111 pqmdio_fdt_probe(device_t dev) 112 { 113 114 if (!ofw_bus_status_okay(dev)) 115 return (ENXIO); 116 117 if (!ofw_bus_search_compatible(dev, mdio_compat_data)->ocd_str) 118 return (ENXIO); 119 120 device_set_desc(dev, "Freescale QorIQ MDIO"); 121 122 return (BUS_PROBE_DEFAULT); 123 } 124 125 static int 126 pqmdio_fdt_attach(device_t dev) 127 { 128 struct pqmdio_softc *sc; 129 rman_res_t start, count; 130 131 sc = device_get_softc(dev); 132 133 fman_get_bushandle(device_get_parent(dev), &sc->sc_handle); 134 bus_get_resource(dev, SYS_RES_MEMORY, 0, &start, &count); 135 sc->sc_offset = start; 136 137 OF_device_register_xref(OF_xref_from_node(ofw_bus_get_node(dev)), dev); 138 139 mtx_init(&sc->sc_lock, device_get_nameunit(dev), "QorIQ MDIO lock", 140 MTX_DEF); 141 142 return (0); 143 } 144 145 static int 146 pqmdio_detach(device_t dev) 147 { 148 struct pqmdio_softc *sc; 149 150 sc = device_get_softc(dev); 151 152 mtx_destroy(&sc->sc_lock); 153 154 return (0); 155 } 156 157 int 158 pqmdio_miibus_readreg(device_t dev, int phy, int reg) 159 { 160 struct pqmdio_softc *sc; 161 int rv; 162 163 sc = device_get_softc(dev); 164 165 MDIO_LOCK(); 166 167 MDIO_WRITE4(sc, MDIO_MIIMADD, (phy << 8) | reg); 168 MDIO_WRITE4(sc, MDIO_MIIMCOM, MIIMCOM_READ_CYCLE); 169 170 MDIO_READ4(sc, MDIO_MIIMCOM); 171 172 while ((MDIO_READ4(sc, MDIO_MIIMIND)) & MIIMIND_BUSY) 173 ; 174 175 rv = MDIO_READ4(sc, MDIO_MIIMSTAT); 176 177 MDIO_WRITE4(sc, MDIO_MIIMCOM, 0); 178 MDIO_READ4(sc, MDIO_MIIMCOM); 179 MDIO_UNLOCK(); 180 181 return (rv); 182 } 183 184 int 185 pqmdio_miibus_writereg(device_t dev, int phy, int reg, int value) 186 { 187 struct pqmdio_softc *sc; 188 189 sc = device_get_softc(dev); 190 191 MDIO_LOCK(); 192 /* Stop the MII management read cycle */ 193 MDIO_WRITE4(sc, MDIO_MIIMCOM, 0); 194 MDIO_READ4(sc, MDIO_MIIMCOM); 195 196 MDIO_WRITE4(sc, MDIO_MIIMADD, (phy << 8) | reg); 197 198 MDIO_WRITE4(sc, MDIO_MIIMCON, value); 199 MDIO_READ4(sc, MDIO_MIIMCON); 200 201 /* Wait till MII management write is complete */ 202 while ((MDIO_READ4(sc, MDIO_MIIMIND)) & MIIMIND_BUSY) 203 ; 204 MDIO_UNLOCK(); 205 206 return (0); 207 } 208 209 EARLY_DRIVER_MODULE(pqmdio, fman, pqmdio_driver, 0, 0, 210 BUS_PASS_SUPPORTDEV); 211 DRIVER_MODULE(miibus, pqmdio, miibus_driver, 0, 0); 212 MODULE_DEPEND(pqmdio, miibus, 1, 1, 1); 213 214