1 /*- 2 * Copyright (c) 2015,2016 Annapurna Labs Ltd. and affiliates 3 * All rights reserved. 4 * 5 * Developed by Semihalf. 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 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 #include <sys/rman.h> 38 #include <sys/conf.h> 39 #include <sys/resource.h> 40 41 #include <machine/bus.h> 42 #include <dev/ofw/ofw_bus_subr.h> 43 44 #include "al_serdes.h" 45 #include "alpine_serdes.h" 46 47 #define SERDES_NUM_GROUPS 5 48 49 static void *serdes_base; 50 static uint32_t serdes_grp_offset[] = {0, 0x400, 0x800, 0xc00, 0x2000}; 51 52 static struct alpine_serdes_eth_group_mode { 53 struct mtx lock; 54 enum alpine_serdes_eth_mode mode; 55 bool mode_set; 56 } alpine_serdes_eth_group_mode[SERDES_NUM_GROUPS]; 57 58 static int al_serdes_probe(device_t dev); 59 static int al_serdes_attach(device_t dev); 60 static int al_serdes_detach(device_t dev); 61 62 static struct resource_spec al_serdes_spec[] = { 63 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 64 { -1, 0 } 65 }; 66 67 struct al_serdes_softc { 68 struct resource *res; 69 }; 70 71 static device_method_t al_serdes_methods[] = { 72 DEVMETHOD(device_probe, al_serdes_probe), 73 DEVMETHOD(device_attach, al_serdes_attach), 74 DEVMETHOD(device_detach, al_serdes_detach), 75 76 DEVMETHOD_END 77 }; 78 79 static driver_t al_serdes_driver = { 80 "serdes", 81 al_serdes_methods, 82 sizeof(struct al_serdes_softc) 83 }; 84 85 static devclass_t al_serdes_devclass; 86 87 DRIVER_MODULE(al_serdes, simplebus, al_serdes_driver, 88 al_serdes_devclass, 0, 0); 89 DRIVER_MODULE(al_serdes, ofwbus, al_serdes_driver, 90 al_serdes_devclass, 0, 0); 91 92 static int 93 al_serdes_probe(device_t dev) 94 { 95 96 if (!ofw_bus_status_okay(dev)) 97 return (ENXIO); 98 99 if (!ofw_bus_is_compatible(dev, "annapurna-labs,al-serdes")) 100 return (ENXIO); 101 102 device_set_desc(dev, "Alpine Serdes"); 103 104 return (BUS_PROBE_DEFAULT); 105 } 106 107 static int 108 al_serdes_attach(device_t dev) 109 { 110 struct al_serdes_softc *sc; 111 int err; 112 113 sc = device_get_softc(dev); 114 115 err = bus_alloc_resources(dev, al_serdes_spec, &sc->res); 116 if (err != 0) { 117 device_printf(dev, "could not allocate resources\n"); 118 return (err); 119 } 120 121 /* Initialize Serdes group locks and mode */ 122 for (int i = 0; i < nitems(alpine_serdes_eth_group_mode); i++) { 123 mtx_init(&alpine_serdes_eth_group_mode[i].lock, "AlSerdesMtx", 124 NULL, MTX_DEF); 125 alpine_serdes_eth_group_mode[i].mode_set = false; 126 } 127 128 serdes_base = (void *)rman_get_bushandle(sc->res); 129 130 return (0); 131 } 132 133 static int 134 al_serdes_detach(device_t dev) 135 { 136 struct al_serdes_softc *sc; 137 138 sc = device_get_softc(dev); 139 140 bus_release_resources(dev, al_serdes_spec, &sc->res); 141 142 for (int i = 0; i < nitems(alpine_serdes_eth_group_mode); i++) { 143 mtx_destroy(&alpine_serdes_eth_group_mode[i].lock); 144 alpine_serdes_eth_group_mode[i].mode_set = false; 145 } 146 147 return (0); 148 } 149 150 void * 151 alpine_serdes_resource_get(uint32_t group) 152 { 153 void *base; 154 155 base = NULL; 156 if (group >= SERDES_NUM_GROUPS) 157 return (NULL); 158 159 if (serdes_base != NULL) 160 base = (void *)((uintptr_t)serdes_base + 161 serdes_grp_offset[group]); 162 163 return (base); 164 } 165 166 int 167 alpine_serdes_eth_mode_set(uint32_t group, enum alpine_serdes_eth_mode mode) 168 { 169 struct alpine_serdes_eth_group_mode *group_mode; 170 171 group_mode = &alpine_serdes_eth_group_mode[group]; 172 173 if (serdes_base == NULL) 174 return (EINVAL); 175 176 if (group >= SERDES_NUM_GROUPS) 177 return (EINVAL); 178 179 mtx_lock(&group_mode->lock); 180 181 if (!group_mode->mode_set || (group_mode->mode != mode)) { 182 struct al_serdes_grp_obj obj; 183 184 al_serdes_handle_grp_init(alpine_serdes_resource_get(group), 185 group, &obj); 186 187 if (mode == ALPINE_SERDES_ETH_MODE_SGMII) 188 obj.mode_set_sgmii(&obj); 189 else 190 obj.mode_set_kr(&obj); 191 192 group_mode->mode = mode; 193 group_mode->mode_set = true; 194 } 195 196 mtx_unlock(&group_mode->lock); 197 198 return (0); 199 } 200 201 void 202 alpine_serdes_eth_group_lock(uint32_t group) 203 { 204 struct alpine_serdes_eth_group_mode *group_mode; 205 206 group_mode = &alpine_serdes_eth_group_mode[group]; 207 208 if (mtx_initialized(&group_mode->lock) == 0) 209 return; 210 211 mtx_lock(&group_mode->lock); 212 } 213 214 void 215 alpine_serdes_eth_group_unlock(uint32_t group) 216 { 217 struct alpine_serdes_eth_group_mode *group_mode; 218 219 group_mode = &alpine_serdes_eth_group_mode[group]; 220 221 if (mtx_initialized(&group_mode->lock) == 0) 222 return; 223 224 mtx_unlock(&group_mode->lock); 225 } 226