1 /*- 2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com> 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 /* 28 * Vybrid Family Input/Output Multiplexer Controller (IOMUXC) 29 * Chapter 5, Vybrid Reference Manual, Rev. 5, 07/2013 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/malloc.h> 41 #include <sys/rman.h> 42 #include <sys/timeet.h> 43 #include <sys/timetc.h> 44 #include <sys/watchdog.h> 45 46 #include <dev/fdt/fdt_common.h> 47 #include <dev/ofw/openfirm.h> 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 51 #include <machine/bus.h> 52 #include <machine/fdt.h> 53 #include <machine/cpu.h> 54 #include <machine/intr.h> 55 56 #include <arm/freescale/vybrid/vf_iomuxc.h> 57 #include <arm/freescale/vybrid/vf_common.h> 58 59 #define IBE (1 << 0) /* Input Buffer Enable Field */ 60 #define OBE (1 << 1) /* Output Buffer Enable Field. */ 61 #define PUE (1 << 2) /* Pull / Keep Select Field. */ 62 #define PKE (1 << 3) /* Pull / Keep Enable Field. */ 63 #define PUS_MASK (3 << 4) /* Pull Up / Down Config Field. */ 64 #define DSE_MASK (7 << 6) /* Drive Strength Field. */ 65 #define HYS (1 << 9) /* Hysteresis Enable Field */ 66 67 #define MUX_MODE_MASK 7 68 #define MUX_MODE_SHIFT 20 69 #define MUX_MODE_GPIO 0 70 #define MUX_MODE_RMII 1 71 #define MUX_MODE_RMII_CLKIN 2 72 #define MUX_MODE_VBUS_EN_OTG 2 73 74 #define PUS_22_KOHM_PULL_UP (3 << 4) 75 #define DSE_25_OHM (6 << 6) 76 77 #define NET0_PAD_START 45 78 #define NET1_PAD_START 54 79 #define NET_PAD_N 9 80 81 struct iomuxc_softc { 82 struct resource *tmr_res[1]; 83 bus_space_tag_t bst; 84 bus_space_handle_t bsh; 85 device_t dev; 86 }; 87 88 static struct resource_spec iomuxc_spec[] = { 89 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 90 { -1, 0 } 91 }; 92 93 static int 94 iomuxc_probe(device_t dev) 95 { 96 97 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-iomuxc")) 98 return (ENXIO); 99 100 device_set_desc(dev, "Vybrid Family IOMUXC Unit"); 101 return (BUS_PROBE_DEFAULT); 102 } 103 104 static int 105 configure_pad(struct iomuxc_softc *sc, int pad, int mux_mode) 106 { 107 int reg; 108 109 reg = READ4(sc, pad); 110 reg &= ~(MUX_MODE_MASK << MUX_MODE_SHIFT); 111 reg |= (mux_mode << MUX_MODE_SHIFT); 112 WRITE4(sc, pad, reg); 113 114 return (0); 115 } 116 117 static int 118 iomuxc_attach(device_t dev) 119 { 120 struct iomuxc_softc *sc; 121 int reg; 122 int i; 123 124 sc = device_get_softc(dev); 125 sc->dev = dev; 126 127 if (bus_alloc_resources(dev, iomuxc_spec, sc->tmr_res)) { 128 device_printf(dev, "could not allocate resources\n"); 129 return (ENXIO); 130 } 131 132 /* Memory interface */ 133 sc->bst = rman_get_bustag(sc->tmr_res[0]); 134 sc->bsh = rman_get_bushandle(sc->tmr_res[0]); 135 136 /* USB */ 137 configure_pad(sc, IOMUXC_PTA17, MUX_MODE_VBUS_EN_OTG); 138 reg = (PKE | PUE | PUS_22_KOHM_PULL_UP | DSE_25_OHM | OBE); 139 WRITE4(sc, IOMUXC_PTA7, reg); 140 141 /* NET */ 142 configure_pad(sc, IOMUXC_PTA6, MUX_MODE_RMII_CLKIN); 143 144 /* NET0 */ 145 for (i = NET0_PAD_START; i <= (NET0_PAD_START + NET_PAD_N); i++) { 146 configure_pad(sc, IOMUXC(i), MUX_MODE_RMII); 147 } 148 149 /* NET1 */ 150 for (i = NET1_PAD_START; i <= (NET1_PAD_START + NET_PAD_N); i++) { 151 configure_pad(sc, IOMUXC(i), MUX_MODE_RMII); 152 } 153 154 return (0); 155 } 156 157 static device_method_t iomuxc_methods[] = { 158 DEVMETHOD(device_probe, iomuxc_probe), 159 DEVMETHOD(device_attach, iomuxc_attach), 160 { 0, 0 } 161 }; 162 163 static driver_t iomuxc_driver = { 164 "iomuxc", 165 iomuxc_methods, 166 sizeof(struct iomuxc_softc), 167 }; 168 169 static devclass_t iomuxc_devclass; 170 171 DRIVER_MODULE(iomuxc, simplebus, iomuxc_driver, iomuxc_devclass, 0, 0); 172