1 /* $NetBSD: exynos_ehci.c,v 1.4 2018/07/03 16:09:04 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2015-2018 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: exynos_ehci.c,v 1.4 2018/07/03 16:09:04 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 48 static int exynos_ehci_match(device_t, cfdata_t, void *); 49 static void exynos_ehci_attach(device_t, device_t, void *); 50 51 CFATTACH_DECL2_NEW(exynos_ehci, sizeof(struct ehci_softc), 52 exynos_ehci_match, exynos_ehci_attach, NULL, 53 ehci_activate, NULL, ehci_childdet); 54 55 static int 56 exynos_ehci_match(device_t parent, cfdata_t cf, void *aux) 57 { 58 const char * const compatible[] = { 59 "samsung,exynos4210-ehci", 60 NULL 61 }; 62 struct fdt_attach_args * const faa = aux; 63 64 return of_match_compatible(faa->faa_phandle, compatible); 65 } 66 67 static void 68 exynos_ehci_attach(device_t parent, device_t self, void *aux) 69 { 70 struct ehci_softc * const sc = device_private(self); 71 struct fdt_attach_args * const faa = aux; 72 const int phandle = faa->faa_phandle; 73 struct fdtbus_phy *phy; 74 struct clk *clk; 75 char intrstr[128]; 76 bus_addr_t addr; 77 bus_size_t size; 78 int error, child; 79 void *ih; 80 81 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 82 aprint_error(": couldn't get registers\n"); 83 return; 84 } 85 86 /* Enable clocks */ 87 clk = fdtbus_clock_get(phandle, "usbhost"); 88 if (clk == NULL || clk_enable(clk) != 0) { 89 aprint_error(": couldn't enable clock\n"); 90 return; 91 } 92 93 /* Enable phys for each port */ 94 for (child = OF_child(phandle); child; child = OF_peer(child)) { 95 phy = fdtbus_phy_get_index(child, 0); 96 if (phy && fdtbus_phy_enable(phy, true) != 0) 97 aprint_error(": couldn't enable phy for %s\n", 98 fdtbus_get_string(child, "name")); 99 } 100 101 sc->sc_dev = self; 102 sc->sc_bus.ub_hcpriv = sc; 103 sc->sc_bus.ub_dmatag = faa->faa_dmat; 104 sc->sc_bus.ub_revision = USBREV_2_0; 105 if (of_hasprop(phandle, "has-transaction-translator")) 106 sc->sc_flags |= EHCIF_ETTF; 107 else 108 sc->sc_ncomp = 1; 109 sc->sc_size = size; 110 sc->iot = faa->faa_bst; 111 if (bus_space_map(sc->iot, addr, size, 0, &sc->ioh) != 0) { 112 aprint_error(": couldn't map registers\n"); 113 return; 114 } 115 116 aprint_naive("\n"); 117 aprint_normal(": Exynos EHCI\n"); 118 119 /* Disable interrupts */ 120 sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH); 121 EOWRITE4(sc, EHCI_USBINTR, 0); 122 123 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 124 aprint_error_dev(self, "failed to decode interrupt\n"); 125 return; 126 } 127 128 ih = fdtbus_intr_establish(phandle, 0, IPL_USB, FDT_INTR_MPSAFE, 129 ehci_intr, sc); 130 if (ih == NULL) { 131 aprint_error_dev(self, "couldn't establish interrupt on %s\n", 132 intrstr); 133 return; 134 } 135 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 136 137 error = ehci_init(sc); 138 if (error) { 139 aprint_error_dev(self, "init failed, error = %d\n", error); 140 return; 141 } 142 143 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint); 144 } 145