1/* $NetBSD: imx51_iomux.c,v 1.3 2012/04/15 09:51:31 bsh Exp $ */ 2 3/* 4 * Copyright (c) 2009, 2010 Genetec Corporation. All rights reserved. 5 * Written by Hashimoto Kenichi for Genetec Corporation. 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 GENETEC CORPORATION ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29/*- 30 * Copyright (c) 2012, 2013 The FreeBSD Foundation 31 * All rights reserved. 32 * 33 * Portions of this software were developed by Oleksandr Rybalko 34 * under sponsorship from the FreeBSD Foundation. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 58#include <sys/cdefs.h> 59__FBSDID("$FreeBSD$"); 60 61#include <sys/param.h> 62#include <sys/systm.h> 63#include <sys/bus.h> 64#include <sys/kernel.h> 65#include <sys/module.h> 66#include <sys/malloc.h> 67#include <sys/rman.h> 68 69#include <machine/bus.h> 70#include <machine/fdt.h> 71 72#include <dev/fdt/fdt_common.h> 73#include <dev/ofw/openfirm.h> 74#include <dev/ofw/ofw_bus.h> 75#include <dev/ofw/ofw_bus_subr.h> 76 77#include <arm/freescale/imx/imx51_iomuxvar.h> 78#include <arm/freescale/imx/imx51_iomuxreg.h> 79 80 81#define IOMUX_WRITE(_sc, _r, _v) \ 82 bus_write_4((_sc)->sc_res, (_r), (_v)) 83#define IOMUX_READ(_sc, _r) \ 84 bus_read_4((_sc)->sc_res, (_r)) 85#define IOMUX_SET(_sc, _r, _m) \ 86 IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) | (_m)) 87#define IOMUX_CLEAR(_sc, _r, _m) \ 88 IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) & ~(_m)) 89 90struct iomux_softc { 91 struct resource *sc_res; 92 device_t sc_dev; 93}; 94 95static int iomux_probe(device_t); 96static int iomux_attach(device_t); 97 98static struct iomux_softc *iomuxsc = NULL; 99 100static struct resource_spec imx_iomux_spec[] = { 101 { SYS_RES_MEMORY, 0, RF_ACTIVE }, /* Global registers */ 102 { -1, 0 } 103}; 104 105static int 106iomux_probe(device_t dev) 107{ 108 109 if (!ofw_bus_is_compatible(dev, "fsl,imx51-iomux") && 110 !ofw_bus_is_compatible(dev, "fsl,imx53-iomux")) 111 return (ENXIO); 112 113 device_set_desc(dev, "Freescale i.MX51 IO pins multiplexor"); 114 return (BUS_PROBE_DEFAULT); 115} 116 117static int 118iomux_attach(device_t dev) 119{ 120 struct iomux_softc * sc; 121 122 sc = device_get_softc(dev); 123 124 if (bus_alloc_resources(dev, imx_iomux_spec, &sc->sc_res)) { 125 device_printf(dev, "could not allocate resources\n"); 126 return (ENXIO); 127 } 128 129 iomuxsc = sc; 130 131 /* 132 * XXX: place to fetch all info about pinmuxing from loader data 133 * (FDT blob) and apply. Loader (1st one) must care about 134 * device-to-device difference. 135 */ 136 137 return (0); 138} 139 140static void 141iomux_set_function_sub(struct iomux_softc *sc, uint32_t pin, uint32_t fn) 142{ 143 bus_size_t mux_ctl_reg = IOMUX_PIN_TO_MUX_ADDRESS(pin); 144 145 if (mux_ctl_reg != IOMUX_MUX_NONE) 146 IOMUX_WRITE(sc, mux_ctl_reg, fn); 147} 148 149void 150iomux_set_function(unsigned int pin, unsigned int fn) 151{ 152 153 if (iomuxsc == NULL) 154 return; 155 iomux_set_function_sub(iomuxsc, pin, fn); 156} 157 158static void 159iomux_set_pad_sub(struct iomux_softc *sc, uint32_t pin, uint32_t config) 160{ 161 bus_size_t pad_ctl_reg = IOMUX_PIN_TO_PAD_ADDRESS(pin); 162 163 if (pad_ctl_reg != IOMUX_PAD_NONE) 164 IOMUX_WRITE(sc, pad_ctl_reg, config); 165} 166 167void 168iomux_set_pad(unsigned int pin, unsigned int config) 169{ 170 171 if (iomuxsc == NULL) 172 return; 173 iomux_set_pad_sub(iomuxsc, pin, config); 174} 175 176#ifdef notyet 177void 178iomux_set_input(unsigned int input, unsigned int config) 179{ 180 bus_size_t input_ctl_reg = input; 181 182 bus_space_write_4(iomuxsc->iomux_memt, iomuxsc->iomux_memh, 183 input_ctl_reg, config); 184} 185#endif 186 187void 188iomux_mux_config(const struct iomux_conf *conflist) 189{ 190 int i; 191 192 if (iomuxsc == NULL) 193 return; 194 for (i = 0; conflist[i].pin != IOMUX_CONF_EOT; i++) { 195 iomux_set_pad_sub(iomuxsc, conflist[i].pin, conflist[i].pad); 196 iomux_set_function_sub(iomuxsc, conflist[i].pin, 197 conflist[i].mux); 198 } 199} 200 201#ifdef notyet 202void 203iomux_input_config(const struct iomux_input_conf *conflist) 204{ 205 int i; 206 207 if (iomuxsc == NULL) 208 return; 209 for (i = 0; conflist[i].inout != -1; i++) { 210 iomux_set_inout(iomuxsc, conflist[i].inout, 211 conflist[i].inout_mode); 212 } 213} 214#endif 215 216static device_method_t imx_iomux_methods[] = { 217 DEVMETHOD(device_probe, iomux_probe), 218 DEVMETHOD(device_attach, iomux_attach), 219 220 DEVMETHOD_END 221}; 222 223static driver_t imx_iomux_driver = { 224 "imx_iomux", 225 imx_iomux_methods, 226 sizeof(struct iomux_softc), 227}; 228 229static devclass_t imx_iomux_devclass; 230 231EARLY_DRIVER_MODULE(imx_iomux, simplebus, imx_iomux_driver, 232 imx_iomux_devclass, 0, 0, BUS_PASS_BUS - 1); 233 234