1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2019 Michal Meloun <mmel@FreeBSD.org> 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 28 #include <sys/cdefs.h> 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/bus.h> 32 #include <sys/gpio.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/malloc.h> 36 #include <sys/rman.h> 37 38 #include <machine/bus.h> 39 40 #include <dev/extres/hwreset/hwreset.h> 41 #include <dev/extres/phy/phy_usb.h> 42 #include <dev/extres/regulator/regulator.h> 43 #include <dev/ofw/ofw_bus.h> 44 #include <dev/ofw/ofw_bus_subr.h> 45 46 #include <dev/fdt/simple_mfd.h> 47 #include "phynode_if.h" 48 #include "phynode_usb_if.h" 49 50 static struct ofw_compat_data compat_data[] = { 51 {"qcom,usb-ss-ipq4019-phy", 1}, 52 {NULL, 0}, 53 }; 54 55 struct ipq4018_usb_ss_phy_softc { 56 device_t dev; 57 }; 58 59 struct ipq4018_usb_ss_phynode_sc { 60 struct phynode_usb_sc usb_sc; 61 int mode; 62 hwreset_t por_rst; 63 }; 64 65 static int 66 ipq4018_usb_ss_phynode_phy_enable(struct phynode *phynode, bool enable) 67 { 68 struct ipq4018_usb_ss_phynode_sc *sc; 69 device_t dev; 70 int rv; 71 72 dev = phynode_get_device(phynode); 73 sc = phynode_get_softc(phynode); 74 75 /* 76 * For power-off - assert por, sleep for 10ms 77 */ 78 rv = hwreset_assert(sc->por_rst); 79 if (rv != 0) 80 goto done; 81 DELAY(10*1000); 82 83 /* 84 * For power-on - power off first, then deassert por. 85 */ 86 if (enable) { 87 rv = hwreset_deassert(sc->por_rst); 88 if (rv != 0) 89 goto done; 90 DELAY(10*1000); 91 } 92 93 done: 94 if (rv != 0) { 95 device_printf(dev, "%s: failed, rv=%d\n", __func__, rv); 96 } 97 return (rv); 98 } 99 100 /* Phy controller class and methods. */ 101 static phynode_method_t ipq4018_usb_ss_phynode_methods[] = { 102 PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_ss_phynode_phy_enable), 103 PHYNODEUSBMETHOD_END 104 }; 105 DEFINE_CLASS_1(ipq4018_usb_ss_phynode, ipq4018_usb_ss_phynode_class, 106 ipq4018_usb_ss_phynode_methods, 107 sizeof(struct ipq4018_usb_ss_phynode_sc), phynode_usb_class); 108 109 static int 110 ipq4018_usb_ss_usbphy_init_phy(struct ipq4018_usb_ss_phy_softc *sc, 111 phandle_t node) 112 { 113 struct phynode *phynode; 114 struct phynode_init_def phy_init; 115 struct ipq4018_usb_ss_phynode_sc *phy_sc; 116 int rv; 117 hwreset_t por_rst = NULL; 118 119 /* FDT resources */ 120 rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst); 121 if (rv != 0 && rv != ENOENT) { 122 device_printf(sc->dev, "Cannot get 'por_rst' reset\n"); 123 goto fail; 124 } 125 126 /* Create and register phy. */ 127 bzero(&phy_init, sizeof(phy_init)); 128 phy_init.id = 1; 129 phy_init.ofw_node = node; 130 phynode = phynode_create(sc->dev, &ipq4018_usb_ss_phynode_class, 131 &phy_init); 132 if (phynode == NULL) { 133 device_printf(sc->dev, "Cannot create phy.\n"); 134 return (ENXIO); 135 } 136 137 phy_sc = phynode_get_softc(phynode); 138 phy_sc->por_rst = por_rst; 139 140 if (phynode_register(phynode) == NULL) { 141 device_printf(sc->dev, "Cannot register phy.\n"); 142 return (ENXIO); 143 } 144 145 (void) ipq4018_usb_ss_phynode_phy_enable(phynode, true); 146 147 return (0); 148 149 fail: 150 if (por_rst != NULL) 151 hwreset_release(por_rst); 152 153 return (ENXIO); 154 } 155 156 static int 157 ipq4018_usb_ss_usbphy_probe(device_t dev) 158 { 159 160 if (!ofw_bus_status_okay(dev)) 161 return (ENXIO); 162 163 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 164 return (ENXIO); 165 166 device_set_desc(dev, "IPQ4018/IPQ4019 USB SS PHY"); 167 return (BUS_PROBE_DEFAULT); 168 } 169 170 static int 171 ipq4018_usb_ss_usbphy_attach(device_t dev) 172 { 173 struct ipq4018_usb_ss_phy_softc *sc; 174 phandle_t node; 175 int rv; 176 177 sc = device_get_softc(dev); 178 sc->dev = dev; 179 node = ofw_bus_get_node(sc->dev); 180 181 rv = ipq4018_usb_ss_usbphy_init_phy(sc, node); 182 if (rv != 0) 183 goto fail; 184 return (bus_generic_attach(dev)); 185 186 fail: 187 return (ENXIO); 188 } 189 190 static int 191 ipq4018_usb_ss_usbphy_detach(device_t dev) 192 { 193 194 return (0); 195 } 196 197 static device_method_t ipq4018_usb_ss_usbphy_methods[] = { 198 /* Device interface */ 199 DEVMETHOD(device_probe, ipq4018_usb_ss_usbphy_probe), 200 DEVMETHOD(device_attach, ipq4018_usb_ss_usbphy_attach), 201 DEVMETHOD(device_detach, ipq4018_usb_ss_usbphy_detach), 202 DEVMETHOD_END 203 }; 204 205 static DEFINE_CLASS_0(ipq4018_usb_ss_usbphy, ipq4018_usb_ss_usbphy_driver, 206 ipq4018_usb_ss_usbphy_methods, 207 sizeof(struct ipq4018_usb_ss_phy_softc)); 208 EARLY_DRIVER_MODULE(ipq4018_usb_ss_usbphy, simplebus, 209 ipq4018_usb_ss_usbphy_driver, NULL, NULL, 210 BUS_PASS_TIMER + BUS_PASS_ORDER_LAST); 211