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-hs-ipq4019-phy", 1}, 52 {NULL, 0}, 53 }; 54 55 struct ipq4018_usb_hs_phy_softc { 56 device_t dev; 57 }; 58 59 struct ipq4018_usb_hs_phynode_sc { 60 struct phynode_usb_sc usb_sc; 61 int mode; 62 hwreset_t por_rst; 63 hwreset_t srif_rst; 64 }; 65 66 static int 67 ipq4018_usb_hs_phynode_phy_enable(struct phynode *phynode, bool enable) 68 { 69 struct ipq4018_usb_hs_phynode_sc *sc; 70 device_t dev; 71 int rv; 72 73 dev = phynode_get_device(phynode); 74 sc = phynode_get_softc(phynode); 75 76 /* 77 * 78 * For power-off - assert por, sleep for 10ms, assert srif, 79 * sleep for 10ms 80 */ 81 rv = hwreset_assert(sc->por_rst); 82 if (rv != 0) 83 goto done; 84 DELAY(10*1000); 85 rv = hwreset_assert(sc->srif_rst); 86 if (rv != 0) 87 goto done; 88 DELAY(10*1000); 89 90 /* 91 * For power-on - power off first, then deassert srif, then 92 * sleep for 10ms, then deassert por. 93 */ 94 if (enable) { 95 rv = hwreset_deassert(sc->srif_rst); 96 if (rv != 0) 97 goto done; 98 DELAY(10*1000); 99 rv = hwreset_deassert(sc->por_rst); 100 if (rv != 0) 101 goto done; 102 DELAY(10*1000); 103 } 104 105 done: 106 if (rv != 0) { 107 device_printf(dev, "%s: failed, rv=%d\n", __func__, rv); 108 } 109 return (rv); 110 } 111 112 /* Phy controller class and methods. */ 113 static phynode_method_t ipq4018_usb_hs_phynode_methods[] = { 114 PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_hs_phynode_phy_enable), 115 PHYNODEUSBMETHOD_END 116 }; 117 DEFINE_CLASS_1(ipq4018_usb_hs_phynode, ipq4018_usb_hs_phynode_class, 118 ipq4018_usb_hs_phynode_methods, 119 sizeof(struct ipq4018_usb_hs_phynode_sc), phynode_usb_class); 120 121 static int 122 ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc *sc, 123 phandle_t node) 124 { 125 struct phynode *phynode; 126 struct phynode_init_def phy_init; 127 struct ipq4018_usb_hs_phynode_sc *phy_sc; 128 int rv; 129 hwreset_t por_rst = NULL, srif_rst = NULL; 130 131 /* FDT resources */ 132 rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst); 133 if (rv != 0 && rv != ENOENT) { 134 device_printf(sc->dev, "Cannot get 'por_rst' reset\n"); 135 goto fail; 136 } 137 rv = hwreset_get_by_ofw_name(sc->dev, node, "srif_rst", &srif_rst); 138 if (rv != 0 && rv != ENOENT) { 139 device_printf(sc->dev, "Cannot get 'srif_rst' reset\n"); 140 goto fail; 141 } 142 143 /* Create and register phy. */ 144 bzero(&phy_init, sizeof(phy_init)); 145 phy_init.id = 1; 146 phy_init.ofw_node = node; 147 phynode = phynode_create(sc->dev, &ipq4018_usb_hs_phynode_class, 148 &phy_init); 149 if (phynode == NULL) { 150 device_printf(sc->dev, "Cannot create phy.\n"); 151 return (ENXIO); 152 } 153 154 phy_sc = phynode_get_softc(phynode); 155 phy_sc->por_rst = por_rst; 156 phy_sc->srif_rst = srif_rst; 157 158 if (phynode_register(phynode) == NULL) { 159 device_printf(sc->dev, "Cannot register phy.\n"); 160 return (ENXIO); 161 } 162 163 (void) ipq4018_usb_hs_phynode_phy_enable(phynode, true); 164 165 return (0); 166 167 fail: 168 if (por_rst != NULL) 169 hwreset_release(por_rst); 170 if (srif_rst != NULL) 171 hwreset_release(srif_rst); 172 173 return (ENXIO); 174 } 175 176 static int 177 ipq4018_usb_hs_usbphy_probe(device_t dev) 178 { 179 180 if (!ofw_bus_status_okay(dev)) 181 return (ENXIO); 182 183 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 184 return (ENXIO); 185 186 device_set_desc(dev, "IPQ4018/IPQ4019 USB HS PHY"); 187 return (BUS_PROBE_DEFAULT); 188 } 189 190 static int 191 ipq4018_usb_hs_usbphy_attach(device_t dev) 192 { 193 struct ipq4018_usb_hs_phy_softc *sc; 194 phandle_t node; 195 int rv; 196 197 sc = device_get_softc(dev); 198 sc->dev = dev; 199 node = ofw_bus_get_node(sc->dev); 200 201 rv = ipq4018_usb_hs_usbphy_init_phy(sc, node); 202 if (rv != 0) 203 goto fail; 204 return (bus_generic_attach(dev)); 205 206 fail: 207 return (ENXIO); 208 } 209 210 static int 211 ipq4018_usb_hs_usbphy_detach(device_t dev) 212 { 213 214 return (0); 215 } 216 217 static device_method_t ipq4018_usb_hs_usbphy_methods[] = { 218 /* Device interface */ 219 DEVMETHOD(device_probe, ipq4018_usb_hs_usbphy_probe), 220 DEVMETHOD(device_attach, ipq4018_usb_hs_usbphy_attach), 221 DEVMETHOD(device_detach, ipq4018_usb_hs_usbphy_detach), 222 DEVMETHOD_END 223 }; 224 225 static DEFINE_CLASS_0(ipq4018_usb_hs_usbphy, ipq4018_usb_hs_usbphy_driver, 226 ipq4018_usb_hs_usbphy_methods, 227 sizeof(struct ipq4018_usb_hs_phy_softc)); 228 EARLY_DRIVER_MODULE(ipq4018_usb_hs_usbphy, simplebus, 229 ipq4018_usb_hs_usbphy_driver, NULL, NULL, 230 BUS_PASS_TIMER + BUS_PASS_ORDER_LAST); 231