am18xx_ohci.c revision 1.1
1 /* $NetBSD $ */ 2 3 /*- 4 * Copyright (c) 2026 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Yuri Honegger. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Driver for the USB1.1 OHCI port on the TI AM18XX family of SoCs. 34 */ 35 36 #include <sys/param.h> 37 #include <sys/bus.h> 38 #include <sys/cdefs.h> 39 #include <sys/device.h> 40 41 #include <dev/clk/clk.h> 42 #include <dev/fdt/fdtvar.h> 43 #include <dev/usb/usb.h> 44 #include <dev/usb/usbdi.h> 45 #include <dev/usb/usbdivar.h> 46 #include <dev/usb/usb_mem.h> 47 #include <dev/usb/ohcireg.h> 48 #include <dev/usb/ohcivar.h> 49 50 struct am18xx_ohci_softc { 51 struct ohci_softc ohci_sc; 52 struct clk *sc_clk; 53 struct fdtbus_phy *sc_phy; 54 }; 55 56 static int am18xx_ohci_match(device_t, cfdata_t, void *); 57 static void am18xx_ohci_attach(device_t, device_t, void *); 58 59 static int am18xx_ohci_enable_clocks(struct am18xx_ohci_softc *); 60 61 CFATTACH_DECL_NEW(am18xxohci, sizeof(struct am18xx_ohci_softc), 62 am18xx_ohci_match, am18xx_ohci_attach, NULL, NULL); 63 64 static const struct device_compatible_entry compat_data[] = { 65 { .compat = "ti,da830-ohci" }, 66 DEVICE_COMPAT_EOL 67 }; 68 69 static int 70 am18xx_ohci_enable_clocks(struct am18xx_ohci_softc *sc) 71 { 72 int error; 73 74 error = clk_enable(sc->sc_clk); 75 if (error != 0) { 76 return error; 77 } 78 79 error = fdtbus_phy_enable(sc->sc_phy, true); 80 if (error != 0) { 81 return error; 82 } 83 84 return 0; 85 } 86 87 int 88 am18xx_ohci_match(device_t parent, cfdata_t cf, void *aux) 89 { 90 struct fdt_attach_args *const faa = aux; 91 92 return of_compatible_match(faa->faa_phandle, compat_data); 93 } 94 95 void 96 am18xx_ohci_attach(device_t parent, device_t self, void *aux) 97 { 98 struct am18xx_ohci_softc *const sc = device_private(self); 99 struct fdt_attach_args *const faa = aux; 100 const int phandle = faa->faa_phandle; 101 bus_addr_t addr; 102 bus_size_t size; 103 char intrstr[128]; 104 int error; 105 106 sc->ohci_sc.iot = faa->faa_bst; 107 sc->ohci_sc.sc_dev = self; 108 sc->ohci_sc.sc_bus.ub_hcpriv = &sc->ohci_sc; 109 sc->ohci_sc.sc_bus.ub_dmatag = faa->faa_dmat; 110 sc->ohci_sc.sc_flags = 0; 111 112 /* get USB 1.1 clock */ 113 sc->sc_clk = fdtbus_clock_get_index(phandle, 0); 114 if (sc->sc_clk == NULL) { 115 aprint_error(": couldn't get usb clock\n"); 116 return; 117 } 118 119 /* get phy */ 120 sc->sc_phy = fdtbus_phy_get(phandle, "usb-phy"); 121 if (sc->sc_phy == NULL) { 122 aprint_error(": couldn't get usb phy\n"); 123 return; 124 } 125 126 /* enable all clocks */ 127 if (am18xx_ohci_enable_clocks(sc)) { 128 aprint_error(": couldn't enable clocks\n"); 129 return; 130 } 131 132 /* map bus space */ 133 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 134 aprint_error(": couldn't get registers\n"); 135 return; 136 } 137 if (bus_space_map(sc->ohci_sc.iot, addr, size, 0, &sc->ohci_sc.ioh)) { 138 aprint_error(": couldn't map registers\n"); 139 return; 140 } 141 sc->ohci_sc.sc_size = size; 142 143 /* disable interrupts on the ohci side */ 144 bus_space_write_4(sc->ohci_sc.iot, sc->ohci_sc.ioh, 145 OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS); 146 147 /* establish interrupt */ 148 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 149 aprint_error(": failed to decode interrupt\n"); 150 return; 151 } 152 void *ih = fdtbus_intr_establish_xname(phandle, 0, IPL_USB, 153 FDT_INTR_MPSAFE, ohci_intr, &sc->ohci_sc, device_xname(self)); 154 if (ih == NULL) { 155 aprint_error_dev(self, ": couldn't install interrupt %s\n", 156 intrstr); 157 return; 158 } 159 160 aprint_normal(": ohci on %s\n", intrstr); 161 162 /* initialize the controller */ 163 error = ohci_init(&sc->ohci_sc); 164 if (error) { 165 aprint_error_dev(self, ": init failed, error=%d\n", error); 166 return; 167 } 168 169 sc->ohci_sc.sc_child = config_found(self, &sc->ohci_sc.sc_bus, 170 usbctlprint, CFARGS_NONE); 171 } 172
Indexes created Thu Jul 09 00:25:44 UTC 2026