1 /* $NetBSD: ohci_fdt.c,v 1.2 2018/04/09 16:21:10 jakllsch 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: ohci_fdt.c,v 1.2 2018/04/09 16:21:10 jakllsch 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/ohcireg.h> 44 #include <dev/usb/ohcivar.h> 45 46 #include <dev/fdt/fdtvar.h> 47 48 static int ohci_fdt_match(device_t, cfdata_t, void *); 49 static void ohci_fdt_attach(device_t, device_t, void *); 50 51 CFATTACH_DECL2_NEW(ohci_fdt, sizeof(struct ohci_softc), 52 ohci_fdt_match, ohci_fdt_attach, NULL, 53 ohci_activate, NULL, ohci_childdet); 54 55 static int 56 ohci_fdt_match(device_t parent, cfdata_t cf, void *aux) 57 { 58 const char * const compatible[] = { 59 "generic-ohci", 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 ohci_fdt_attach(device_t parent, device_t self, void *aux) 69 { 70 struct ohci_softc * const sc = device_private(self); 71 struct fdt_attach_args * const faa = aux; 72 const int phandle = faa->faa_phandle; 73 struct fdtbus_reset *rst; 74 struct fdtbus_phy *phy; 75 struct clk *clk; 76 char intrstr[128]; 77 bus_addr_t addr; 78 bus_size_t size; 79 int error; 80 void *ih; 81 u_int n; 82 83 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 84 aprint_error(": couldn't get registers\n"); 85 return; 86 } 87 88 /* Enable clocks */ 89 for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++) 90 if (clk_enable(clk) != 0) { 91 aprint_error(": couldn't enable clock #%d\n", n); 92 return; 93 } 94 /* De-assert resets */ 95 for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++) 96 if (fdtbus_reset_deassert(rst) != 0) { 97 aprint_error(": couldn't de-assert reset #%d\n", n); 98 return; 99 } 100 101 /* Enable optional phy */ 102 phy = fdtbus_phy_get(phandle, "usb"); 103 if (phy && fdtbus_phy_enable(phy, true) != 0) { 104 aprint_error(": couldn't enable phy\n"); 105 return; 106 } 107 108 sc->sc_dev = self; 109 sc->sc_bus.ub_hcpriv = sc; 110 sc->sc_bus.ub_dmatag = faa->faa_dmat; 111 sc->sc_flags = 0; 112 sc->sc_size = size; 113 sc->iot = faa->faa_bst; 114 if (bus_space_map(sc->iot, addr, size, 0, &sc->ioh) != 0) { 115 aprint_error(": couldn't map registers\n"); 116 return; 117 } 118 119 aprint_naive("\n"); 120 aprint_normal(": OHCI\n"); 121 122 /* Disable interrupts */ 123 bus_space_write_4(sc->iot, sc->ioh, OHCI_INTERRUPT_DISABLE, 124 OHCI_ALL_INTRS); 125 126 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 127 aprint_error_dev(self, "failed to decode interrupt\n"); 128 return; 129 } 130 131 ih = fdtbus_intr_establish(phandle, 0, IPL_USB, FDT_INTR_MPSAFE, 132 ohci_intr, sc); 133 if (ih == NULL) { 134 aprint_error_dev(self, "couldn't establish interrupt on %s\n", 135 intrstr); 136 return; 137 } 138 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 139 140 error = ohci_init(sc); 141 if (error) { 142 aprint_error_dev(self, "init failed, error = %d\n", error); 143 return; 144 } 145 146 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint); 147 } 148