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