1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/gpio.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/malloc.h> 38 #include <sys/rman.h> 39 40 #include <machine/bus.h> 41 42 #include <dev/extres/hwreset/hwreset.h> 43 #include <dev/extres/phy/phy_usb.h> 44 #include <dev/extres/regulator/regulator.h> 45 #include <dev/ofw/ofw_bus.h> 46 #include <dev/ofw/ofw_bus_subr.h> 47 48 #include <dev/fdt/simple_mfd.h> 49 #include "phynode_if.h" 50 #include "phynode_usb_if.h" 51 52 static struct ofw_compat_data compat_data[] = { 53 {"qcom,usb-hs-ipq4019-phy", 1}, 54 {NULL, 0}, 55 }; 56 57 struct ipq4018_usb_hs_phy_softc { 58 device_t dev; 59 }; 60 61 struct ipq4018_usb_hs_phynode_sc { 62 struct phynode_usb_sc usb_sc; 63 int mode; 64 hwreset_t por_rst; 65 hwreset_t srif_rst; 66 }; 67 68 static int 69 ipq4018_usb_hs_phynode_phy_enable(struct phynode *phynode, bool enable) 70 { 71 struct ipq4018_usb_hs_phynode_sc *sc; 72 device_t dev; 73 int rv; 74 75 dev = phynode_get_device(phynode); 76 sc = phynode_get_softc(phynode); 77 78 /* 79 * 80 * For power-off - assert por, sleep for 10ms, assert srif, 81 * sleep for 10ms 82 */ 83 rv = hwreset_assert(sc->por_rst); 84 if (rv != 0) 85 goto done; 86 DELAY(10*1000); 87 rv = hwreset_assert(sc->srif_rst); 88 if (rv != 0) 89 goto done; 90 DELAY(10*1000); 91 92 /* 93 * For power-on - power off first, then deassert srif, then 94 * sleep for 10ms, then deassert por. 95 */ 96 if (enable) { 97 rv = hwreset_deassert(sc->srif_rst); 98 if (rv != 0) 99 goto done; 100 DELAY(10*1000); 101 rv = hwreset_deassert(sc->por_rst); 102 if (rv != 0) 103 goto done; 104 DELAY(10*1000); 105 } 106 107 done: 108 if (rv != 0) { 109 device_printf(dev, "%s: failed, rv=%d\n", __func__, rv); 110 } 111 return (rv); 112 } 113 114 /* Phy controller class and methods. */ 115 static phynode_method_t ipq4018_usb_hs_phynode_methods[] = { 116 PHYNODEUSBMETHOD(phynode_enable, ipq4018_usb_hs_phynode_phy_enable), 117 PHYNODEUSBMETHOD_END 118 }; 119 DEFINE_CLASS_1(ipq4018_usb_hs_phynode, ipq4018_usb_hs_phynode_class, 120 ipq4018_usb_hs_phynode_methods, 121 sizeof(struct ipq4018_usb_hs_phynode_sc), phynode_usb_class); 122 123 static int 124 ipq4018_usb_hs_usbphy_init_phy(struct ipq4018_usb_hs_phy_softc *sc, 125 phandle_t node) 126 { 127 struct phynode *phynode; 128 struct phynode_init_def phy_init; 129 struct ipq4018_usb_hs_phynode_sc *phy_sc; 130 int rv; 131 hwreset_t por_rst = NULL, srif_rst = NULL; 132 133 /* FDT resources */ 134 rv = hwreset_get_by_ofw_name(sc->dev, node, "por_rst", &por_rst); 135 if (rv != 0 && rv != ENOENT) { 136 device_printf(sc->dev, "Cannot get 'por_rst' reset\n"); 137 goto fail; 138 } 139 rv = hwreset_get_by_ofw_name(sc->dev, node, "srif_rst", &srif_rst); 140 if (rv != 0 && rv != ENOENT) { 141 device_printf(sc->dev, "Cannot get 'srif_rst' reset\n"); 142 goto fail; 143 } 144 145 /* Create and register phy. */ 146 bzero(&phy_init, sizeof(phy_init)); 147 phy_init.id = 1; 148 phy_init.ofw_node = node; 149 phynode = phynode_create(sc->dev, &ipq4018_usb_hs_phynode_class, 150 &phy_init); 151 if (phynode == NULL) { 152 device_printf(sc->dev, "Cannot create phy.\n"); 153 return (ENXIO); 154 } 155 156 phy_sc = phynode_get_softc(phynode); 157 phy_sc->por_rst = por_rst; 158 phy_sc->srif_rst = srif_rst; 159 160 if (phynode_register(phynode) == NULL) { 161 device_printf(sc->dev, "Cannot register phy.\n"); 162 return (ENXIO); 163 } 164 165 (void) ipq4018_usb_hs_phynode_phy_enable(phynode, true); 166 167 return (0); 168 169 fail: 170 if (por_rst != NULL) 171 hwreset_release(por_rst); 172 if (srif_rst != NULL) 173 hwreset_release(srif_rst); 174 175 return (ENXIO); 176 } 177 178 static int 179 ipq4018_usb_hs_usbphy_probe(device_t dev) 180 { 181 182 if (!ofw_bus_status_okay(dev)) 183 return (ENXIO); 184 185 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 186 return (ENXIO); 187 188 device_set_desc(dev, "IPQ4018/IPQ4019 USB HS PHY"); 189 return (BUS_PROBE_DEFAULT); 190 } 191 192 static int 193 ipq4018_usb_hs_usbphy_attach(device_t dev) 194 { 195 struct ipq4018_usb_hs_phy_softc *sc; 196 phandle_t node; 197 int rv; 198 199 sc = device_get_softc(dev); 200 sc->dev = dev; 201 node = ofw_bus_get_node(sc->dev); 202 203 rv = ipq4018_usb_hs_usbphy_init_phy(sc, node); 204 if (rv != 0) 205 goto fail; 206 return (bus_generic_attach(dev)); 207 208 fail: 209 return (ENXIO); 210 } 211 212 static int 213 ipq4018_usb_hs_usbphy_detach(device_t dev) 214 { 215 216 return (0); 217 } 218 219 static device_method_t ipq4018_usb_hs_usbphy_methods[] = { 220 /* Device interface */ 221 DEVMETHOD(device_probe, ipq4018_usb_hs_usbphy_probe), 222 DEVMETHOD(device_attach, ipq4018_usb_hs_usbphy_attach), 223 DEVMETHOD(device_detach, ipq4018_usb_hs_usbphy_detach), 224 DEVMETHOD_END 225 }; 226 227 static DEFINE_CLASS_0(ipq4018_usb_hs_usbphy, ipq4018_usb_hs_usbphy_driver, 228 ipq4018_usb_hs_usbphy_methods, 229 sizeof(struct ipq4018_usb_hs_phy_softc)); 230 EARLY_DRIVER_MODULE(ipq4018_usb_hs_usbphy, simplebus, 231 ipq4018_usb_hs_usbphy_driver, NULL, NULL, 232 BUS_PASS_TIMER + BUS_PASS_ORDER_LAST); 233