15c263f43SRuslan Bukin /*- 2bf636ac4SRuslan Bukin * Copyright (c) 2013-2014 Ruslan Bukin <br@bsdpad.com> 35c263f43SRuslan Bukin * All rights reserved. 45c263f43SRuslan Bukin * 55c263f43SRuslan Bukin * Redistribution and use in source and binary forms, with or without 65c263f43SRuslan Bukin * modification, are permitted provided that the following conditions 75c263f43SRuslan Bukin * are met: 85c263f43SRuslan Bukin * 1. Redistributions of source code must retain the above copyright 95c263f43SRuslan Bukin * notice, this list of conditions and the following disclaimer. 105c263f43SRuslan Bukin * 2. Redistributions in binary form must reproduce the above copyright 115c263f43SRuslan Bukin * notice, this list of conditions and the following disclaimer in the 125c263f43SRuslan Bukin * documentation and/or other materials provided with the distribution. 135c263f43SRuslan Bukin * 145c263f43SRuslan Bukin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 155c263f43SRuslan Bukin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 165c263f43SRuslan Bukin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 175c263f43SRuslan Bukin * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 185c263f43SRuslan Bukin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 195c263f43SRuslan Bukin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 205c263f43SRuslan Bukin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 215c263f43SRuslan Bukin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 225c263f43SRuslan Bukin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 235c263f43SRuslan Bukin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 245c263f43SRuslan Bukin * SUCH DAMAGE. 255c263f43SRuslan Bukin */ 265c263f43SRuslan Bukin 275c263f43SRuslan Bukin /* 285c263f43SRuslan Bukin * Vybrid Family Input/Output Multiplexer Controller (IOMUXC) 295c263f43SRuslan Bukin * Chapter 5, Vybrid Reference Manual, Rev. 5, 07/2013 305c263f43SRuslan Bukin */ 315c263f43SRuslan Bukin 325c263f43SRuslan Bukin #include <sys/cdefs.h> 335c263f43SRuslan Bukin __FBSDID("$FreeBSD$"); 345c263f43SRuslan Bukin 355c263f43SRuslan Bukin #include <sys/param.h> 365c263f43SRuslan Bukin #include <sys/systm.h> 375c263f43SRuslan Bukin #include <sys/bus.h> 385c263f43SRuslan Bukin #include <sys/kernel.h> 395c263f43SRuslan Bukin #include <sys/module.h> 405c263f43SRuslan Bukin #include <sys/malloc.h> 415c263f43SRuslan Bukin #include <sys/rman.h> 425c263f43SRuslan Bukin #include <sys/timeet.h> 435c263f43SRuslan Bukin #include <sys/timetc.h> 445c263f43SRuslan Bukin #include <sys/watchdog.h> 455c263f43SRuslan Bukin 465c263f43SRuslan Bukin #include <dev/fdt/fdt_common.h> 475c263f43SRuslan Bukin #include <dev/ofw/openfirm.h> 485c263f43SRuslan Bukin #include <dev/ofw/ofw_bus.h> 495c263f43SRuslan Bukin #include <dev/ofw/ofw_bus_subr.h> 505c263f43SRuslan Bukin 515c263f43SRuslan Bukin #include <machine/bus.h> 525c263f43SRuslan Bukin #include <machine/cpu.h> 535c263f43SRuslan Bukin #include <machine/intr.h> 545c263f43SRuslan Bukin 555c263f43SRuslan Bukin #include <arm/freescale/vybrid/vf_iomuxc.h> 565c263f43SRuslan Bukin #include <arm/freescale/vybrid/vf_common.h> 575c263f43SRuslan Bukin 585c263f43SRuslan Bukin #define MUX_MODE_MASK 7 595c263f43SRuslan Bukin #define MUX_MODE_SHIFT 20 605c263f43SRuslan Bukin #define MUX_MODE_GPIO 0 615c263f43SRuslan Bukin #define MUX_MODE_VBUS_EN_OTG 2 625c263f43SRuslan Bukin 63ee270bbcSRuslan Bukin #define IBE (1 << 0) /* Input Buffer Enable Field */ 64ee270bbcSRuslan Bukin #define OBE (1 << 1) /* Output Buffer Enable Field. */ 65ee270bbcSRuslan Bukin #define PUE (1 << 2) /* Pull / Keep Select Field. */ 66ee270bbcSRuslan Bukin #define PKE (1 << 3) /* Pull / Keep Enable Field. */ 67ee270bbcSRuslan Bukin #define HYS (1 << 9) /* Hysteresis Enable Field */ 68ee270bbcSRuslan Bukin #define ODE (1 << 10) /* Open Drain Enable Field. */ 69ee270bbcSRuslan Bukin #define SRE (1 << 11) /* Slew Rate Field. */ 70ee270bbcSRuslan Bukin 71ee270bbcSRuslan Bukin #define SPEED_SHIFT 12 72ee270bbcSRuslan Bukin #define SPEED_MASK 0x3 73ee270bbcSRuslan Bukin #define SPEED_LOW 0 /* 50 MHz */ 74ee270bbcSRuslan Bukin #define SPEED_MEDIUM 0x1 /* 100 MHz */ 75ee270bbcSRuslan Bukin #define SPEED_HIGH 0x3 /* 200 MHz */ 76ee270bbcSRuslan Bukin 77ee270bbcSRuslan Bukin #define PUS_SHIFT 4 /* Pull Up / Down Config Field Shift */ 78ee270bbcSRuslan Bukin #define PUS_MASK 0x3 79ee270bbcSRuslan Bukin #define PUS_100_KOHM_PULL_DOWN 0 80ee270bbcSRuslan Bukin #define PUS_47_KOHM_PULL_UP 0x1 81ee270bbcSRuslan Bukin #define PUS_100_KOHM_PULL_UP 0x2 82ee270bbcSRuslan Bukin #define PUS_22_KOHM_PULL_UP 0x3 83ee270bbcSRuslan Bukin 84ee270bbcSRuslan Bukin #define DSE_SHIFT 6 /* Drive Strength Field Shift */ 85ee270bbcSRuslan Bukin #define DSE_MASK 0x7 86ee270bbcSRuslan Bukin #define DSE_DISABLED 0 /* Output driver disabled */ 87ee270bbcSRuslan Bukin #define DSE_150_OHM 0x1 88ee270bbcSRuslan Bukin #define DSE_75_OHM 0x2 89ee270bbcSRuslan Bukin #define DSE_50_OHM 0x3 90ee270bbcSRuslan Bukin #define DSE_37_OHM 0x4 91ee270bbcSRuslan Bukin #define DSE_30_OHM 0x5 92ee270bbcSRuslan Bukin #define DSE_25_OHM 0x6 93ee270bbcSRuslan Bukin #define DSE_20_OHM 0x7 945c263f43SRuslan Bukin 95bf636ac4SRuslan Bukin #define MAX_MUX_LEN 1024 965c263f43SRuslan Bukin 975c263f43SRuslan Bukin struct iomuxc_softc { 985c263f43SRuslan Bukin struct resource *tmr_res[1]; 995c263f43SRuslan Bukin bus_space_tag_t bst; 1005c263f43SRuslan Bukin bus_space_handle_t bsh; 1015c263f43SRuslan Bukin device_t dev; 1025c263f43SRuslan Bukin }; 1035c263f43SRuslan Bukin 1045c263f43SRuslan Bukin static struct resource_spec iomuxc_spec[] = { 1055c263f43SRuslan Bukin { SYS_RES_MEMORY, 0, RF_ACTIVE }, 1065c263f43SRuslan Bukin { -1, 0 } 1075c263f43SRuslan Bukin }; 1085c263f43SRuslan Bukin 1095c263f43SRuslan Bukin static int 1105c263f43SRuslan Bukin iomuxc_probe(device_t dev) 1115c263f43SRuslan Bukin { 1125c263f43SRuslan Bukin 113add35ed5SIan Lepore if (!ofw_bus_status_okay(dev)) 114add35ed5SIan Lepore return (ENXIO); 115add35ed5SIan Lepore 1165c263f43SRuslan Bukin if (!ofw_bus_is_compatible(dev, "fsl,mvf600-iomuxc")) 1175c263f43SRuslan Bukin return (ENXIO); 1185c263f43SRuslan Bukin 1195c263f43SRuslan Bukin device_set_desc(dev, "Vybrid Family IOMUXC Unit"); 1205c263f43SRuslan Bukin return (BUS_PROBE_DEFAULT); 1215c263f43SRuslan Bukin } 1225c263f43SRuslan Bukin 1235c263f43SRuslan Bukin static int 124bf636ac4SRuslan Bukin pinmux_set(struct iomuxc_softc *sc) 125bf636ac4SRuslan Bukin { 126bf636ac4SRuslan Bukin phandle_t child, parent, root; 127bf636ac4SRuslan Bukin pcell_t iomux_config[MAX_MUX_LEN]; 128bf636ac4SRuslan Bukin int len; 129bf636ac4SRuslan Bukin int values; 130bf636ac4SRuslan Bukin int pin; 131ee270bbcSRuslan Bukin int pin_cfg; 132bf636ac4SRuslan Bukin int i; 133bf636ac4SRuslan Bukin 134bf636ac4SRuslan Bukin root = OF_finddevice("/"); 135bf636ac4SRuslan Bukin len = 0; 136bf636ac4SRuslan Bukin parent = root; 137bf636ac4SRuslan Bukin 138bf636ac4SRuslan Bukin /* Find 'iomux_config' prop in the nodes */ 139bf636ac4SRuslan Bukin for (child = OF_child(parent); child != 0; child = OF_peer(child)) { 140bf636ac4SRuslan Bukin 141bf636ac4SRuslan Bukin /* Find a 'leaf'. Start the search from this node. */ 142bf636ac4SRuslan Bukin while (OF_child(child)) { 143bf636ac4SRuslan Bukin parent = child; 144bf636ac4SRuslan Bukin child = OF_child(child); 145bf636ac4SRuslan Bukin } 146bf636ac4SRuslan Bukin 147bf636ac4SRuslan Bukin if (!fdt_is_enabled(child)) 148bf636ac4SRuslan Bukin continue; 149bf636ac4SRuslan Bukin 150bf636ac4SRuslan Bukin if ((len = OF_getproplen(child, "iomux_config")) > 0) { 151*9783ea5cSAndrew Turner OF_getencprop(child, "iomux_config", iomux_config, len); 152bf636ac4SRuslan Bukin 153bf636ac4SRuslan Bukin values = len / (sizeof(uint32_t)); 154bf636ac4SRuslan Bukin for (i = 0; i < values; i += 2) { 155*9783ea5cSAndrew Turner pin = iomux_config[i]; 156*9783ea5cSAndrew Turner pin_cfg = iomux_config[i+1]; 157bf636ac4SRuslan Bukin #if 0 158ee270bbcSRuslan Bukin device_printf(sc->dev, "Set pin %d to 0x%08x\n", 159ee270bbcSRuslan Bukin pin, pin_cfg); 160bf636ac4SRuslan Bukin #endif 161ee270bbcSRuslan Bukin WRITE4(sc, IOMUXC(pin), pin_cfg); 162bf636ac4SRuslan Bukin } 163bf636ac4SRuslan Bukin } 164bf636ac4SRuslan Bukin 165bf636ac4SRuslan Bukin if (OF_peer(child) == 0) { 166bf636ac4SRuslan Bukin /* No more siblings. */ 167bf636ac4SRuslan Bukin child = parent; 168bf636ac4SRuslan Bukin parent = OF_parent(child); 169bf636ac4SRuslan Bukin } 170bf636ac4SRuslan Bukin } 171bf636ac4SRuslan Bukin 172bf636ac4SRuslan Bukin return (0); 173bf636ac4SRuslan Bukin } 174bf636ac4SRuslan Bukin 175bf636ac4SRuslan Bukin static int 1765c263f43SRuslan Bukin iomuxc_attach(device_t dev) 1775c263f43SRuslan Bukin { 1785c263f43SRuslan Bukin struct iomuxc_softc *sc; 1795c263f43SRuslan Bukin 1805c263f43SRuslan Bukin sc = device_get_softc(dev); 1815c263f43SRuslan Bukin sc->dev = dev; 1825c263f43SRuslan Bukin 1835c263f43SRuslan Bukin if (bus_alloc_resources(dev, iomuxc_spec, sc->tmr_res)) { 1845c263f43SRuslan Bukin device_printf(dev, "could not allocate resources\n"); 1855c263f43SRuslan Bukin return (ENXIO); 1865c263f43SRuslan Bukin } 1875c263f43SRuslan Bukin 1885c263f43SRuslan Bukin /* Memory interface */ 1895c263f43SRuslan Bukin sc->bst = rman_get_bustag(sc->tmr_res[0]); 1905c263f43SRuslan Bukin sc->bsh = rman_get_bushandle(sc->tmr_res[0]); 1915c263f43SRuslan Bukin 192bf636ac4SRuslan Bukin pinmux_set(sc); 1935c263f43SRuslan Bukin 1945c263f43SRuslan Bukin return (0); 1955c263f43SRuslan Bukin } 1965c263f43SRuslan Bukin 1975c263f43SRuslan Bukin static device_method_t iomuxc_methods[] = { 1985c263f43SRuslan Bukin DEVMETHOD(device_probe, iomuxc_probe), 1995c263f43SRuslan Bukin DEVMETHOD(device_attach, iomuxc_attach), 2005c263f43SRuslan Bukin { 0, 0 } 2015c263f43SRuslan Bukin }; 2025c263f43SRuslan Bukin 2035c263f43SRuslan Bukin static driver_t iomuxc_driver = { 2045c263f43SRuslan Bukin "iomuxc", 2055c263f43SRuslan Bukin iomuxc_methods, 2065c263f43SRuslan Bukin sizeof(struct iomuxc_softc), 2075c263f43SRuslan Bukin }; 2085c263f43SRuslan Bukin 2095c263f43SRuslan Bukin static devclass_t iomuxc_devclass; 2105c263f43SRuslan Bukin 2115c263f43SRuslan Bukin DRIVER_MODULE(iomuxc, simplebus, iomuxc_driver, iomuxc_devclass, 0, 0); 212