1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2018 Rubicon Communications, LLC (Netgate) 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/rman.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 41 #include <machine/bus.h> 42 #include <machine/resource.h> 43 #include <machine/intr.h> 44 45 #include <dev/extres/syscon/syscon.h> 46 47 #include <dev/fdt/fdt_pinctrl.h> 48 49 #include <dev/ofw/ofw_bus.h> 50 #include <dev/ofw/ofw_bus_subr.h> 51 52 #include "syscon_if.h" 53 54 #define PINS_PER_REG 8 55 #define BITS_PER_PIN 4 56 #define PINS_MASK 0xf 57 #define MAX_PIN_FUNC 5 58 59 struct mv_pins { 60 const char *name; 61 const char *functions[MAX_PIN_FUNC]; 62 }; 63 64 struct mv_padconf { 65 const struct mv_pins *pins; 66 size_t npins; 67 }; 68 69 const static struct mv_pins ap806_pins[] = { 70 {"mpp0", {"gpio", "sdio", NULL, "spi0"}}, 71 {"mpp1", {"gpio", "sdio", NULL, "spi0"}}, 72 {"mpp2", {"gpio", "sdio", NULL, "spi0"}}, 73 {"mpp3", {"gpio", "sdio", NULL, "spi0"}}, 74 {"mpp4", {"gpio", "sdio", NULL, "i2c0"}}, 75 {"mpp5", {"gpio", "sdio", NULL, "i2c0"}}, 76 {"mpp6", {"gpio", "sdio", NULL, NULL}}, 77 {"mpp7", {"gpio", "sdio", NULL, "uart1"}}, 78 {"mpp8", {"gpio", "sdio", NULL, "uart1"}}, 79 {"mpp9", {"gpio", "sdio", NULL, "spi0"}}, 80 {"mpp10", {"gpio", "sdio", NULL, NULL}}, 81 {"mpp11", {"gpio", NULL, NULL, "uart0"}}, 82 {"mpp12", {"gpio", "sdio", "sdio", NULL}}, 83 {"mpp13", {"gpio", NULL, NULL}}, 84 {"mpp14", {"gpio", NULL, NULL}}, 85 {"mpp15", {"gpio", NULL, NULL}}, 86 {"mpp16", {"gpio", NULL, NULL}}, 87 {"mpp17", {"gpio", NULL, NULL}}, 88 {"mpp18", {"gpio", NULL, NULL}}, 89 {"mpp19", {"gpio", NULL, NULL, "uart0", "sdio"}}, 90 }; 91 92 const struct mv_padconf ap806_padconf = { 93 .npins = nitems(ap806_pins), 94 .pins = ap806_pins, 95 }; 96 97 struct mv_pinctrl_softc { 98 device_t dev; 99 struct syscon *syscon; 100 101 struct mv_padconf *padconf; 102 }; 103 104 static struct ofw_compat_data compat_data[] = { 105 {"marvell,ap806-pinctrl", (uintptr_t)&ap806_padconf}, 106 {NULL, 0} 107 }; 108 109 #define RD4(sc, reg) SYSCON_READ_4((sc)->syscon, (reg)) 110 #define WR4(sc, reg, val) SYSCON_WRITE_4((sc)->syscon, (reg), (val)) 111 112 static void 113 mv_pinctrl_configure_pin(struct mv_pinctrl_softc *sc, uint32_t pin, 114 uint32_t function) 115 { 116 uint32_t offset, shift, reg; 117 118 offset = (pin / PINS_PER_REG) * BITS_PER_PIN; 119 shift = (pin % PINS_PER_REG) * BITS_PER_PIN; 120 reg = RD4(sc, offset); 121 reg &= ~(PINS_MASK << shift); 122 reg |= function << shift; 123 WR4(sc, offset, reg); 124 } 125 126 static int 127 mv_pinctrl_configure_pins(device_t dev, phandle_t cfgxref) 128 { 129 struct mv_pinctrl_softc *sc; 130 phandle_t node; 131 char *function; 132 const char **pins; 133 int i, pin_num, pin_func, npins; 134 135 sc = device_get_softc(dev); 136 node = OF_node_from_xref(cfgxref); 137 138 if (OF_getprop_alloc(node, "marvell,function", 139 (void **)&function) == -1) 140 return (ENOMEM); 141 142 npins = ofw_bus_string_list_to_array(node, "marvell,pins", &pins); 143 if (npins == -1) 144 return (ENOMEM); 145 146 for (i = 0; i < npins; i++) { 147 for (pin_num = 0; pin_num < sc->padconf->npins; pin_num++) { 148 if (strcmp(pins[i], sc->padconf->pins[pin_num].name) == 0) 149 break; 150 } 151 if (pin_num == sc->padconf->npins) 152 continue; 153 154 for (pin_func = 0; pin_func < MAX_PIN_FUNC; pin_func++) 155 if (sc->padconf->pins[pin_num].functions[pin_func] && 156 strcmp(function, sc->padconf->pins[pin_num].functions[pin_func]) == 0) 157 break; 158 159 if (pin_func == MAX_PIN_FUNC) 160 continue; 161 162 mv_pinctrl_configure_pin(sc, pin_num, pin_func); 163 } 164 165 OF_prop_free(pins); 166 167 return (0); 168 } 169 170 static int 171 mv_pinctrl_probe(device_t dev) 172 { 173 174 if (!ofw_bus_status_okay(dev)) 175 return (ENXIO); 176 177 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 178 return (ENXIO); 179 180 device_set_desc(dev, "Marvell Pinctrl controller"); 181 return (BUS_PROBE_DEFAULT); 182 } 183 184 static int 185 mv_pinctrl_attach(device_t dev) 186 { 187 struct mv_pinctrl_softc *sc; 188 189 sc = device_get_softc(dev); 190 sc->dev = dev; 191 sc->padconf = (struct mv_padconf *) 192 ofw_bus_search_compatible(dev,compat_data)->ocd_data; 193 194 if (SYSCON_GET_HANDLE(sc->dev, &sc->syscon) != 0 || 195 sc->syscon == NULL) { 196 device_printf(dev, "cannot get syscon for device\n"); 197 return (ENXIO); 198 } 199 200 fdt_pinctrl_register(dev, "marvell,pins"); 201 fdt_pinctrl_configure_tree(dev); 202 203 return (0); 204 } 205 206 static int 207 mv_pinctrl_detach(device_t dev) 208 { 209 210 return (EBUSY); 211 } 212 213 static device_method_t mv_pinctrl_methods[] = { 214 /* Device interface */ 215 DEVMETHOD(device_probe, mv_pinctrl_probe), 216 DEVMETHOD(device_attach, mv_pinctrl_attach), 217 DEVMETHOD(device_detach, mv_pinctrl_detach), 218 219 /* fdt_pinctrl interface */ 220 DEVMETHOD(fdt_pinctrl_configure,mv_pinctrl_configure_pins), 221 222 DEVMETHOD_END 223 }; 224 225 static driver_t mv_pinctrl_driver = { 226 "mv_pinctrl", 227 mv_pinctrl_methods, 228 sizeof(struct mv_pinctrl_softc), 229 }; 230 231 EARLY_DRIVER_MODULE(mv_pinctrl, simplebus, mv_pinctrl_driver, 0, 0, 232 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE); 233