1132332Smarcel/*- 2132360Smarcel * Copyright (c) 2013 Ian Lepore <ian@freebsd.org> 3132332Smarcel * All rights reserved. 4132332Smarcel * 5132332Smarcel * Redistribution and use in source and binary forms, with or without 6132332Smarcel * modification, are permitted provided that the following conditions 7132332Smarcel * are met: 8132332Smarcel * 1. Redistributions of source code must retain the above copyright 9132332Smarcel * notice, this list of conditions and the following disclaimer. 10132332Smarcel * 2. Redistributions in binary form must reproduce the above copyright 11132332Smarcel * notice, this list of conditions and the following disclaimer in the 12132332Smarcel * documentation and/or other materials provided with the distribution. 13132332Smarcel * 14132332Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15132332Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16132332Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17132332Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18132332Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19132332Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20132332Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21132332Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22132332Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23132332Smarcel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24132332Smarcel * SUCH DAMAGE. 25132332Smarcel */ 26132332Smarcel 27132332Smarcel#include <sys/cdefs.h> 28132332Smarcel__FBSDID("$FreeBSD: releng/10.3/sys/arm/freescale/imx/imx6_usbphy.c 266371 2014-05-17 22:29:24Z ian $"); 29132332Smarcel 30132332Smarcel/* 31132332Smarcel * USBPHY driver for Freescale i.MX6 family of SoCs. 32132332Smarcel */ 33132332Smarcel 34132332Smarcel#include "opt_bus.h" 35132332Smarcel 36132332Smarcel#include <sys/param.h> 37132332Smarcel#include <sys/systm.h> 38132332Smarcel#include <sys/kernel.h> 39132332Smarcel#include <sys/module.h> 40132332Smarcel#include <sys/bus.h> 41132332Smarcel#include <sys/rman.h> 42132332Smarcel 43132332Smarcel#include <dev/ofw/ofw_bus.h> 44132332Smarcel#include <dev/ofw/ofw_bus_subr.h> 45132332Smarcel 46132332Smarcel#include <machine/bus.h> 47132332Smarcel 48132332Smarcel#include <arm/freescale/imx/imx_ccmvar.h> 49132332Smarcel#include <arm/freescale/imx/imx6_anatopreg.h> 50132332Smarcel#include <arm/freescale/imx/imx6_anatopvar.h> 51132332Smarcel 52132332Smarcel/* 53132332Smarcel * Hardware register defines. 54132332Smarcel */ 55132332Smarcel#define PWD_REG 0x0000 56132332Smarcel#define CTRL_STATUS_REG 0x0030 57132332Smarcel#define CTRL_SET_REG 0x0034 58132332Smarcel#define CTRL_CLR_REG 0x0038 59132332Smarcel#define CTRL_TOGGLE_REG 0x003c 60144922Sdavidxu#define CTRL_SFTRST (1U << 31) 61132332Smarcel#define CTRL_CLKGATE (1 << 30) 62132332Smarcel#define CTRL_ENUTMILEVEL3 (1 << 15) 63132332Smarcel#define CTRL_ENUTMILEVEL2 (1 << 14) 64132332Smarcel 65132332Smarcelstruct usbphy_softc { 66132332Smarcel device_t dev; 67132332Smarcel struct resource *mem_res; 68132332Smarcel u_int phy_num; 69132332Smarcel}; 70132332Smarcel 71132332Smarcelstatic int 72132332Smarcelusbphy_detach(device_t dev) 73132332Smarcel{ 74132332Smarcel struct usbphy_softc *sc; 75132332Smarcel 76132360Smarcel sc = device_get_softc(dev); 77132360Smarcel 78132360Smarcel if (sc->mem_res != NULL) 79132360Smarcel bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); 80132360Smarcel 81132360Smarcel return (0); 82132360Smarcel} 83132360Smarcel 84132360Smarcelstatic int 85132360Smarcelusbphy_attach(device_t dev) 86132360Smarcel{ 87132360Smarcel struct usbphy_softc *sc; 88132360Smarcel int err, regoff, rid; 89132360Smarcel 90132332Smarcel sc = device_get_softc(dev); 91132332Smarcel err = 0; 92132332Smarcel 93132332Smarcel /* Allocate bus_space resources. */ 94132332Smarcel rid = 0; 95132332Smarcel sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 96132332Smarcel RF_ACTIVE); 97132332Smarcel if (sc->mem_res == NULL) { 98183021Smarcel device_printf(dev, "Cannot allocate memory resources\n"); 99132332Smarcel err = ENXIO; 100132332Smarcel goto out; 101132332Smarcel } 102132332Smarcel 103132332Smarcel /* 104132360Smarcel * XXX Totally lame way to get the unit number (but not quite as lame as 105132360Smarcel * adding an ad-hoc property to the fdt data). This works as long as 106132360Smarcel * this driver is used for imx6 only. 107132360Smarcel */ 108132360Smarcel const uint32_t PWD_PHY1_REG_PHYSADDR = 0x020c9000; 109132360Smarcel if (BUS_SPACE_PHYSADDR(sc->mem_res, 0) == PWD_PHY1_REG_PHYSADDR) { 110132332Smarcel sc->phy_num = 0; 111132360Smarcel regoff = 0; 112132332Smarcel } else { 113132332Smarcel sc->phy_num = 1; 114132360Smarcel regoff = 0x60; 115132332Smarcel } 116132332Smarcel 117132332Smarcel /* 118132332Smarcel * Based on a note in the u-boot source code, disable charger detection 119132332Smarcel * to avoid degrading the differential signaling on the DP line. Note 120132332Smarcel * that this disables (by design) both charger detection and contact 121132332Smarcel * detection, because of the screwball mix of active-high and active-low 122132332Smarcel * bits in this register. 123132332Smarcel */ 124132332Smarcel imx6_anatop_write_4(IMX6_ANALOG_USB1_CHRG_DETECT + regoff, 125132332Smarcel IMX6_ANALOG_USB_CHRG_DETECT_N_ENABLE | 126132332Smarcel IMX6_ANALOG_USB_CHRG_DETECT_N_CHK_CHRG); 127132332Smarcel 128132332Smarcel imx6_anatop_write_4(IMX6_ANALOG_USB1_CHRG_DETECT + regoff, 129132332Smarcel IMX6_ANALOG_USB_CHRG_DETECT_N_ENABLE | 130132332Smarcel IMX6_ANALOG_USB_CHRG_DETECT_N_CHK_CHRG); 131132332Smarcel 132132332Smarcel /* XXX Configure the overcurrent detection here. */ 133132332Smarcel 134132332Smarcel /* 135132332Smarcel * Turn on the phy clocks. 136132332Smarcel */ 137132332Smarcel imx_ccm_usbphy_enable(dev); 138132332Smarcel 139132332Smarcel /* 140132332Smarcel * Set the software reset bit, then clear both it and the clock gate bit 141132332Smarcel * to bring the device out of reset with the clock running. 142132332Smarcel */ 143132332Smarcel bus_write_4(sc->mem_res, CTRL_SET_REG, CTRL_SFTRST); 144132332Smarcel bus_write_4(sc->mem_res, CTRL_CLR_REG, CTRL_SFTRST | CTRL_CLKGATE); 145132332Smarcel 146132332Smarcel /* Power up: clear all bits in the powerdown register. */ 147132332Smarcel bus_write_4(sc->mem_res, PWD_REG, 0); 148132332Smarcel 149132332Smarcel err = 0; 150132332Smarcel 151132332Smarcelout: 152132332Smarcel 153132332Smarcel if (err != 0) 154132332Smarcel usbphy_detach(dev); 155132332Smarcel 156132332Smarcel return (err); 157132332Smarcel} 158132332Smarcel 159132332Smarcelstatic int 160132332Smarcelusbphy_probe(device_t dev) 161132332Smarcel{ 162132332Smarcel 163132332Smarcel if (!ofw_bus_status_okay(dev)) 164132332Smarcel return (ENXIO); 165132332Smarcel 166132332Smarcel if (ofw_bus_is_compatible(dev, "fsl,imx6q-usbphy") == 0) 167132332Smarcel return (ENXIO); 168132332Smarcel 169132332Smarcel device_set_desc(dev, "Freescale i.MX6 USB PHY"); 170132332Smarcel 171132332Smarcel return (BUS_PROBE_DEFAULT); 172132332Smarcel} 173132332Smarcel 174132332Smarcelstatic device_method_t usbphy_methods[] = { 175132360Smarcel /* Device interface */ 176132332Smarcel DEVMETHOD(device_probe, usbphy_probe), 177132332Smarcel DEVMETHOD(device_attach, usbphy_attach), 178132332Smarcel DEVMETHOD(device_detach, usbphy_detach), 179132332Smarcel 180144663Sdavidxu DEVMETHOD_END 181132332Smarcel}; 182132332Smarcel 183132332Smarcelstatic driver_t usbphy_driver = { 184132332Smarcel "usbphy", 185132332Smarcel usbphy_methods, 186132332Smarcel sizeof(struct usbphy_softc) 187193826Sdes}; 188132332Smarcel 189132332Smarcelstatic devclass_t usbphy_devclass; 190132332Smarcel 191132332SmarcelDRIVER_MODULE(usbphy, simplebus, usbphy_driver, usbphy_devclass, 0, 0); 192132332Smarcel 193132332Smarcel