1 /* $NetBSD: rk3288_usb.c,v 1.1 2021/11/12 22:02:08 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2021 Jared McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 31 __KERNEL_RCSID(0, "$NetBSD: rk3288_usb.c,v 1.1 2021/11/12 22:02:08 jmcneill Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/device.h> 36 #include <sys/intr.h> 37 #include <sys/systm.h> 38 #include <sys/time.h> 39 #include <sys/kmem.h> 40 41 #include <dev/fdt/fdtvar.h> 42 #include <dev/fdt/syscon.h> 43 44 #define GRF_UOCn_CON0_SIDDQ __BIT(13) 45 46 static int rk3288_usb_match(device_t, cfdata_t, void *); 47 static void rk3288_usb_attach(device_t, device_t, void *); 48 49 static const struct device_compatible_entry compat_data[] = { 50 { .compat = "rockchip,rk3288-usb-phy" }, 51 DEVICE_COMPAT_EOL 52 }; 53 54 CFATTACH_DECL_NEW(rk3288_usb, 0, 55 rk3288_usb_match, rk3288_usb_attach, NULL, NULL); 56 57 static int 58 rk3288_usb_match(device_t parent, cfdata_t cf, void *aux) 59 { 60 struct fdt_attach_args * const faa = aux; 61 62 return of_compatible_match(faa->faa_phandle, compat_data); 63 } 64 65 static void 66 rk3288_usb_attach(device_t parent, device_t self, void *aux) 67 { 68 struct fdt_attach_args * const faa = aux; 69 const int phandle = faa->faa_phandle; 70 int child; 71 72 aprint_naive("\n"); 73 aprint_normal(": USB PHY\n"); 74 75 for (child = OF_child(phandle); child; child = OF_peer(child)) { 76 if (!fdtbus_status_okay(child)) 77 continue; 78 79 struct fdt_attach_args cfaa = *faa; 80 cfaa.faa_phandle = child; 81 cfaa.faa_name = fdtbus_get_string(child, "name"); 82 cfaa.faa_quiet = false; 83 84 config_found(self, &cfaa, NULL, CFARGS_NONE); 85 } 86 } 87 88 /* 89 * USB PHY 90 */ 91 92 static int rk3288_usbphy_match(device_t, cfdata_t, void *); 93 static void rk3288_usbphy_attach(device_t, device_t, void *); 94 95 struct rk3288_usbphy_softc { 96 device_t sc_dev; 97 int sc_phandle; 98 struct syscon *sc_syscon; 99 bus_addr_t sc_reg; 100 }; 101 102 CFATTACH_DECL_NEW(rk3288_usbphy, sizeof(struct rk3288_usbphy_softc), 103 rk3288_usbphy_match, rk3288_usbphy_attach, NULL, NULL); 104 105 static void * 106 rk3288_usbphy_acquire(device_t dev, const void *data, size_t len) 107 { 108 struct rk3288_usbphy_softc * const sc = device_private(dev); 109 110 if (len != 0) 111 return NULL; 112 113 return sc; 114 } 115 116 static void 117 rk3288_usbphy_release(device_t dev, void *priv) 118 { 119 } 120 121 static int 122 rk3288_usbphy_enable(device_t dev, void *priv, bool enable) 123 { 124 struct rk3288_usbphy_softc * const sc = device_private(dev); 125 uint32_t write_mask, write_val; 126 127 write_mask = GRF_UOCn_CON0_SIDDQ << 16; 128 write_val = enable ? 0 : GRF_UOCn_CON0_SIDDQ; 129 130 syscon_lock(sc->sc_syscon); 131 syscon_write_4(sc->sc_syscon, sc->sc_reg, write_mask | write_val); 132 syscon_unlock(sc->sc_syscon); 133 134 return 0; 135 } 136 137 const struct fdtbus_phy_controller_func rk3288_usbphy_funcs = { 138 .acquire = rk3288_usbphy_acquire, 139 .release = rk3288_usbphy_release, 140 .enable = rk3288_usbphy_enable, 141 }; 142 143 static int 144 rk3288_usbphy_match(device_t parent, cfdata_t cf, void *aux) 145 { 146 return 1; 147 } 148 149 static void 150 rk3288_usbphy_attach(device_t parent, device_t self, void *aux) 151 { 152 struct rk3288_usbphy_softc * const sc = device_private(self); 153 struct fdt_attach_args * const faa = aux; 154 const int phandle = faa->faa_phandle; 155 struct fdtbus_reset *rst; 156 157 sc->sc_dev = self; 158 sc->sc_phandle = phandle; 159 sc->sc_syscon = fdtbus_syscon_lookup(OF_parent(OF_parent(phandle))); 160 if (sc->sc_syscon == NULL) { 161 aprint_error(": couldn't find syscon\n"); 162 return; 163 } 164 if (fdtbus_get_reg(phandle, 0, &sc->sc_reg, NULL) != 0) { 165 aprint_error(": couldn't find registers\n"); 166 return; 167 } 168 169 rst = fdtbus_reset_get(phandle, "phy-reset"); 170 if (rst == NULL || fdtbus_reset_deassert(rst) != 0) { 171 aprint_error(": couldn't de-assert reset\n"); 172 return; 173 } 174 if (fdtbus_clock_enable(phandle, "phyclk", true) != 0) { 175 aprint_error(": couildn't enable clock\n"); 176 return; 177 } 178 179 aprint_naive("\n"); 180 aprint_normal(": USB port\n"); 181 182 fdtbus_register_phy_controller(self, phandle, &rk3288_usbphy_funcs); 183 } 184
Indexes created Sun Oct 25 00:26:45 UTC 2026