1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/rman.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <machine/intr.h> 46 47 #include <dev/extres/syscon/syscon.h> 48 49 #include <dev/fdt/fdt_pinctrl.h> 50 51 #include <dev/ofw/ofw_bus.h> 52 #include <dev/ofw/ofw_bus_subr.h> 53 54 #include "syscon_if.h" 55 56 #define PINS_PER_REG 8 57 #define BITS_PER_PIN 4 58 #define PINS_MASK 0xf 59 #define MAX_PIN_FUNC 5 60 61 struct mv_pins { 62 const char *name; 63 const char *functions[MAX_PIN_FUNC]; 64 }; 65 66 struct mv_padconf { 67 const struct mv_pins *pins; 68 size_t npins; 69 }; 70 71 const static struct mv_pins ap806_pins[] = { 72 {"mpp0", {"gpio", "sdio", NULL, "spi0"}}, 73 {"mpp1", {"gpio", "sdio", NULL, "spi0"}}, 74 {"mpp2", {"gpio", "sdio", NULL, "spi0"}}, 75 {"mpp3", {"gpio", "sdio", NULL, "spi0"}}, 76 {"mpp4", {"gpio", "sdio", NULL, "i2c0"}}, 77 {"mpp5", {"gpio", "sdio", NULL, "i2c0"}}, 78 {"mpp6", {"gpio", "sdio", NULL, NULL}}, 79 {"mpp7", {"gpio", "sdio", NULL, "uart1"}}, 80 {"mpp8", {"gpio", "sdio", NULL, "uart1"}}, 81 {"mpp9", {"gpio", "sdio", NULL, "spi0"}}, 82 {"mpp10", {"gpio", "sdio", NULL, NULL}}, 83 {"mpp11", {"gpio", NULL, NULL, "uart0"}}, 84 {"mpp12", {"gpio", "sdio", "sdio", NULL}}, 85 {"mpp13", {"gpio", NULL, NULL}}, 86 {"mpp14", {"gpio", NULL, NULL}}, 87 {"mpp15", {"gpio", NULL, NULL}}, 88 {"mpp16", {"gpio", NULL, NULL}}, 89 {"mpp17", {"gpio", NULL, NULL}}, 90 {"mpp18", {"gpio", NULL, NULL}}, 91 {"mpp19", {"gpio", NULL, NULL, "uart0", "sdio"}}, 92 }; 93 94 const struct mv_padconf ap806_padconf = { 95 .npins = nitems(ap806_pins), 96 .pins = ap806_pins, 97 }; 98 99 struct mv_pinctrl_softc { 100 device_t dev; 101 struct syscon *syscon; 102 103 struct mv_padconf *padconf; 104 }; 105 106 static struct ofw_compat_data compat_data[] = { 107 {"marvell,ap806-pinctrl", (uintptr_t)&ap806_padconf}, 108 {NULL, 0} 109 }; 110 111 #define RD4(sc, reg) SYSCON_READ_4((sc)->syscon, (reg)) 112 #define WR4(sc, reg, val) SYSCON_WRITE_4((sc)->syscon, (reg), (val)) 113 114 static void 115 mv_pinctrl_configure_pin(struct mv_pinctrl_softc *sc, uint32_t pin, 116 uint32_t function) 117 { 118 uint32_t offset, shift, reg; 119 120 offset = (pin / PINS_PER_REG) * BITS_PER_PIN; 121 shift = (pin % PINS_PER_REG) * BITS_PER_PIN; 122 reg = RD4(sc, offset); 123 reg &= ~(PINS_MASK << shift); 124 reg |= function << shift; 125 WR4(sc, offset, reg); 126 } 127 128 static int 129 mv_pinctrl_configure_pins(device_t dev, phandle_t cfgxref) 130 { 131 struct mv_pinctrl_softc *sc; 132 phandle_t node; 133 char *function; 134 const char **pins; 135 int i, pin_num, pin_func, npins; 136 137 sc = device_get_softc(dev); 138 node = OF_node_from_xref(cfgxref); 139 140 if (OF_getprop_alloc(node, "marvell,function", 141 (void **)&function) == -1) 142 return (ENOMEM); 143 144 npins = ofw_bus_string_list_to_array(node, "marvell,pins", &pins); 145 if (npins == -1) 146 return (ENOMEM); 147 148 for (i = 0; i < npins; i++) { 149 for (pin_num = 0; pin_num < sc->padconf->npins; pin_num++) { 150 if (strcmp(pins[i], sc->padconf->pins[pin_num].name) == 0) 151 break; 152 } 153 if (pin_num == sc->padconf->npins) 154 continue; 155 156 for (pin_func = 0; pin_func < MAX_PIN_FUNC; pin_func++) 157 if (sc->padconf->pins[pin_num].functions[pin_func] && 158 strcmp(function, sc->padconf->pins[pin_num].functions[pin_func]) == 0) 159 break; 160 161 if (pin_func == MAX_PIN_FUNC) 162 continue; 163 164 mv_pinctrl_configure_pin(sc, pin_num, pin_func); 165 } 166 167 OF_prop_free(pins); 168 169 return (0); 170 } 171 172 static int 173 mv_pinctrl_probe(device_t dev) 174 { 175 176 if (!ofw_bus_status_okay(dev)) 177 return (ENXIO); 178 179 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 180 return (ENXIO); 181 182 device_set_desc(dev, "Marvell Pinctrl controller"); 183 return (BUS_PROBE_DEFAULT); 184 } 185 186 static int 187 mv_pinctrl_attach(device_t dev) 188 { 189 struct mv_pinctrl_softc *sc; 190 191 sc = device_get_softc(dev); 192 sc->dev = dev; 193 sc->padconf = (struct mv_padconf *) 194 ofw_bus_search_compatible(dev,compat_data)->ocd_data; 195 196 if (SYSCON_GET_HANDLE(sc->dev, &sc->syscon) != 0 || 197 sc->syscon == NULL) { 198 device_printf(dev, "cannot get syscon for device\n"); 199 return (ENXIO); 200 } 201 202 fdt_pinctrl_register(dev, "marvell,pins"); 203 fdt_pinctrl_configure_tree(dev); 204 205 return (0); 206 } 207 208 static int 209 mv_pinctrl_detach(device_t dev) 210 { 211 212 return (EBUSY); 213 } 214 215 static device_method_t mv_pinctrl_methods[] = { 216 /* Device interface */ 217 DEVMETHOD(device_probe, mv_pinctrl_probe), 218 DEVMETHOD(device_attach, mv_pinctrl_attach), 219 DEVMETHOD(device_detach, mv_pinctrl_detach), 220 221 /* fdt_pinctrl interface */ 222 DEVMETHOD(fdt_pinctrl_configure,mv_pinctrl_configure_pins), 223 224 DEVMETHOD_END 225 }; 226 227 static driver_t mv_pinctrl_driver = { 228 "mv_pinctrl", 229 mv_pinctrl_methods, 230 sizeof(struct mv_pinctrl_softc), 231 }; 232 233 EARLY_DRIVER_MODULE(mv_pinctrl, simplebus, mv_pinctrl_driver, 0, 0, 234 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE); 235