ehci_fdt.c revision 1.1
1/* $NetBSD: ehci_fdt.c,v 1.1 2017/06/29 17:04:53 jmcneill Exp $ */ 2 3/*- 4 * Copyright (c) 2015-2017 Jared McNeill <jmcneill@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 AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__KERNEL_RCSID(0, "$NetBSD: ehci_fdt.c,v 1.1 2017/06/29 17:04:53 jmcneill Exp $"); 31 32#include <sys/param.h> 33#include <sys/bus.h> 34#include <sys/device.h> 35#include <sys/intr.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38 39#include <dev/usb/usb.h> 40#include <dev/usb/usbdi.h> 41#include <dev/usb/usbdivar.h> 42#include <dev/usb/usb_mem.h> 43#include <dev/usb/ehcireg.h> 44#include <dev/usb/ehcivar.h> 45 46#include <dev/fdt/fdtvar.h> 47 48static int ehci_fdt_match(device_t, cfdata_t, void *); 49static void ehci_fdt_attach(device_t, device_t, void *); 50 51CFATTACH_DECL2_NEW(ehci_fdt, sizeof(struct ehci_softc), 52 ehci_fdt_match, ehci_fdt_attach, NULL, 53 ehci_activate, NULL, ehci_childdet); 54 55static void 56ehci_fdt_find_companions(struct ehci_softc *sc) 57{ 58 const char * drivers[] = { "ohci", "uhci", NULL }; 59 device_t comp_dev; 60 int unit, n; 61 62 /* XXX find an ohci or uhci with the same unit as us */ 63 unit = device_unit(sc->sc_dev); 64 65 for (n = 0; drivers[n] != NULL; n++) { 66 comp_dev = device_find_by_driver_unit(drivers[n], unit); 67 if (comp_dev != NULL) 68 sc->sc_comps[sc->sc_ncomp++] = comp_dev; 69 } 70} 71 72static int 73ehci_fdt_match(device_t parent, cfdata_t cf, void *aux) 74{ 75 const char * const compatible[] = { 76 "generic-ehci", 77 NULL 78 }; 79 struct fdt_attach_args * const faa = aux; 80 81 return of_match_compatible(faa->faa_phandle, compatible); 82} 83 84static void 85ehci_fdt_attach(device_t parent, device_t self, void *aux) 86{ 87 struct ehci_softc * const sc = device_private(self); 88 struct fdt_attach_args * const faa = aux; 89 const int phandle = faa->faa_phandle; 90 struct fdtbus_reset *rst; 91 struct fdtbus_phy *phy; 92 struct clk *clk; 93 char intrstr[128]; 94 bus_addr_t addr; 95 bus_size_t size; 96 int error; 97 void *ih; 98 u_int n; 99 100 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 101 aprint_error(": couldn't get registers\n"); 102 return; 103 } 104 105 /* Enable clocks */ 106 for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++) 107 if (clk_enable(clk) != 0) { 108 aprint_error(": couldn't enable clock #%d\n", n); 109 return; 110 } 111 /* De-assert resets */ 112 for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++) 113 if (fdtbus_reset_deassert(rst) != 0) { 114 aprint_error(": couldn't de-assert reset #%d\n", n); 115 return; 116 } 117 118 /* Enable optional phy */ 119 phy = fdtbus_phy_get(phandle, "usb"); 120 if (phy && fdtbus_phy_enable(phy, true) != 0) { 121 aprint_error(": couldn't enable phy\n"); 122 return; 123 } 124 125 sc->sc_dev = self; 126 sc->sc_bus.ub_hcpriv = sc; 127 sc->sc_bus.ub_dmatag = faa->faa_dmat; 128 sc->sc_bus.ub_revision = USBREV_2_0; 129 if (of_hasprop(phandle, "has-transaction-translator")) 130 sc->sc_flags |= EHCIF_ETTF; 131 else 132 ehci_fdt_find_companions(sc); 133 sc->sc_id_vendor = 0; 134 strlcpy(sc->sc_vendor, "Generic", sizeof(sc->sc_vendor)); 135 sc->sc_size = size; 136 sc->iot = faa->faa_bst; 137 if (bus_space_map(sc->iot, addr, size, 0, &sc->ioh) != 0) { 138 aprint_error(": couldn't map registers\n"); 139 return; 140 } 141 142 aprint_naive("\n"); 143 aprint_normal(": EHCI\n"); 144 145 /* Disable interrupts */ 146 sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH); 147 EOWRITE4(sc, EHCI_USBINTR, 0); 148 149 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 150 aprint_error_dev(self, "failed to decode interrupt\n"); 151 return; 152 } 153 154 ih = fdtbus_intr_establish(phandle, 0, IPL_USB, FDT_INTR_MPSAFE, 155 ehci_intr, sc); 156 if (ih == NULL) { 157 aprint_error_dev(self, "couldn't establish interrupt on %s\n", 158 intrstr); 159 return; 160 } 161 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 162 163 error = ehci_init(sc); 164 if (error) { 165 aprint_error_dev(self, "init failed, error = %d\n", error); 166 return; 167 } 168 169 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint); 170} 171