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-hs-ipq4019-phy", 1}, 51 {NULL, 0}, 52 }; 53 54 struct ipq4018_usb_hs_phy_softc { 55 device_t dev; 56 }; 57 58 struct ipq4018_usb_hs_phynode_sc { 59 struct phynode_usb_sc usb_sc; 60 int mode; 61 hwreset_t por_rst; 62 hwreset_t srif_rst; 63 }; 64 65 static int 66 ipq4018_usb_hs_phynode_phy_enable(struct phynode *phynode, bool enable) 67 { 68 struct ipq4018_usb_hs_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 * 77 * For power-off - assert por, sleep for 10ms, assert srif, 78 * sleep for 10ms 79 */ 80 rv = hwreset_assert(sc->por_rst); 81 if (rv != 0) 82 goto done; 83 DELAY(10*1000); 84 rv = hwreset_assert(sc->srif_rst); 85 if (rv != 0) 86 goto done; 87 DELAY(10*1000); 88 89 /* 90 * For power-on - power off first, then deassert srif, then 91 * sleep for 10ms, then deassert por. 92 */ 93 if (enable) { 94 rv = hwreset_deassert(sc->srif_rst); 95 if (rv != 0) 96 goto done; 97 DELAY(10*1000); 98 rv = hwreset_deassert(sc->por_rst); 99 if (rv != 0) 100 goto done; 101 DELAY(10*1000); 102 } 103 104 done: 105 if (rv != 0) { 106 device_printf(dev, "%s: failed, rv=%d\n", __func__, rv); 107 } 108 return (rv); 109 } 110 111 /* Phy controller class and methods. */ 112 static phynode_method_t ipq4018_usb_hs_phynode_methods[] = { 113 PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_hs_phynode_phy_enable), 114 PHYNODEUSBMETHOD_END 115 }; 116 DEFINE_CLASS_1(ipq4018_usb_hs_phynode, ipq4018_usb_hs_phynode_class, 117 ipq4018_usb_hs_phynode_methods, 118 sizeof(struct ipq4018_usb_hs_phynode_sc), phynode_usb_class); 119 120 static int 121 ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc *sc, 122 phandle_t node) 123 { 124 struct phynode *phynode; 125 struct phynode_init_def phy_init; 126 struct ipq4018_usb_hs_phynode_sc *phy_sc; 127 int rv; 128 hwreset_t por_rst = NULL, srif_rst = NULL; 129 130 /* FDT resources */ 131 rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst); 132 if (rv != 0 && rv != ENOENT) { 133 device_printf(sc->dev, "Cannot get 'por_rst' reset\n"); 134 goto fail; 135 } 136 rv = hwreset_get_by_ofw_name(sc->dev, node, "srif_rst", &srif_rst); 137 if (rv != 0 && rv != ENOENT) { 138 device_printf(sc->dev, "Cannot get 'srif_rst' reset\n"); 139 goto fail; 140 } 141 142 /* Create and register phy. */ 143 bzero(&phy_init, sizeof(phy_init)); 144 phy_init.id = 1; 145 phy_init.ofw_node = node; 146 phynode = phynode_create(sc->dev, &ipq4018_usb_hs_phynode_class, 147 &phy_init); 148 if (phynode == NULL) { 149 device_printf(sc->dev, "Cannot create phy.\n"); 150 return (ENXIO); 151 } 152 153 phy_sc = phynode_get_softc(phynode); 154 phy_sc->por_rst = por_rst; 155 phy_sc->srif_rst = srif_rst; 156 157 if (phynode_register(phynode) == NULL) { 158 device_printf(sc->dev, "Cannot register phy.\n"); 159 return (ENXIO); 160 } 161 162 (void) ipq4018_usb_hs_phynode_phy_enable(phynode, true); 163 164 return (0); 165 166 fail: 167 if (por_rst != NULL) 168 hwreset_release(por_rst); 169 if (srif_rst != NULL) 170 hwreset_release(srif_rst); 171 172 return (ENXIO); 173 } 174 175 static int 176 ipq4018_usb_hs_usbphy_probe(device_t dev) 177 { 178 179 if (!ofw_bus_status_okay(dev)) 180 return (ENXIO); 181 182 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 183 return (ENXIO); 184 185 device_set_desc(dev, "IPQ4018/IPQ4019 USB HS PHY"); 186 return (BUS_PROBE_DEFAULT); 187 } 188 189 static int 190 ipq4018_usb_hs_usbphy_attach(device_t dev) 191 { 192 struct ipq4018_usb_hs_phy_softc *sc; 193 phandle_t node; 194 int rv; 195 196 sc = device_get_softc(dev); 197 sc->dev = dev; 198 node = ofw_bus_get_node(sc->dev); 199 200 rv = ipq4018_usb_hs_usbphy_init_phy(sc, node); 201 if (rv != 0) 202 goto fail; 203 return (bus_generic_attach(dev)); 204 205 fail: 206 return (ENXIO); 207 } 208 209 static int 210 ipq4018_usb_hs_usbphy_detach(device_t dev) 211 { 212 213 return (0); 214 } 215 216 static device_method_t ipq4018_usb_hs_usbphy_methods[] = { 217 /* Device interface */ 218 DEVMETHOD(device_probe, ipq4018_usb_hs_usbphy_probe), 219 DEVMETHOD(device_attach, ipq4018_usb_hs_usbphy_attach), 220 DEVMETHOD(device_detach, ipq4018_usb_hs_usbphy_detach), 221 DEVMETHOD_END 222 }; 223 224 static DEFINE_CLASS_0(ipq4018_usb_hs_usbphy, ipq4018_usb_hs_usbphy_driver, 225 ipq4018_usb_hs_usbphy_methods, 226 sizeof(struct ipq4018_usb_hs_phy_softc)); 227 EARLY_DRIVER_MODULE(ipq4018_usb_hs_usbphy, simplebus, 228 ipq4018_usb_hs_usbphy_driver, NULL, NULL, 229 BUS_PASS_TIMER + BUS_PASS_ORDER_LAST); 230