ti_ehci.c revision 1.3
1/* $NetBSD: ti_ehci.c,v 1.3 2021/01/27 03:10:20 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 2015-2019 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: ti_ehci.c,v 1.3 2021/01/27 03:10:20 thorpej 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#define TI_EHCI_NPORTS 3 49 50static int ti_ehci_match(device_t, cfdata_t, void *); 51static void ti_ehci_attach(device_t, device_t, void *); 52 53CFATTACH_DECL2_NEW(ti_ehci, sizeof(struct ehci_softc), 54 ti_ehci_match, ti_ehci_attach, NULL, 55 ehci_activate, NULL, ehci_childdet); 56 57static const struct device_compatible_entry compat_data[] = { 58 { .compat = "ti,ehci-omap" }, 59 DEVICE_COMPAT_EOL 60}; 61 62static int 63ti_ehci_match(device_t parent, cfdata_t cf, void *aux) 64{ 65 struct fdt_attach_args * const faa = aux; 66 67 return of_compatible_match(faa->faa_phandle, compat_data); 68} 69 70static void 71ti_ehci_attach(device_t parent, device_t self, void *aux) 72{ 73 struct ehci_softc * const sc = device_private(self); 74 struct fdt_attach_args * const faa = aux; 75 const int phandle = faa->faa_phandle; 76 struct fdtbus_reset *rst; 77 struct fdtbus_phy *phy; 78 struct clk *clk; 79 char intrstr[128]; 80 bus_addr_t addr; 81 bus_size_t size; 82 int error; 83 void *ih; 84 u_int n; 85 86 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 87 aprint_error(": couldn't get registers\n"); 88 return; 89 } 90 91 /* Enable clocks */ 92 for (n = 0; (clk = fdtbus_clock_get_index(phandle, n)) != NULL; n++) 93 if (clk_enable(clk) != 0) { 94 aprint_error(": couldn't enable clock #%d\n", n); 95 return; 96 } 97 /* De-assert resets */ 98 for (n = 0; (rst = fdtbus_reset_get_index(phandle, n)) != NULL; n++) 99 if (fdtbus_reset_deassert(rst) != 0) { 100 aprint_error(": couldn't de-assert reset #%d\n", n); 101 return; 102 } 103 104 sc->sc_dev = self; 105 sc->sc_bus.ub_hcpriv = sc; 106 sc->sc_bus.ub_dmatag = faa->faa_dmat; 107 sc->sc_bus.ub_revision = USBREV_2_0; 108 if (of_hasprop(phandle, "has-transaction-translator")) 109 sc->sc_flags |= EHCIF_ETTF; 110 else 111 sc->sc_ncomp = 1; 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(": EHCI\n"); 121 122 /* Enable PHYs */ 123 for (n = 0; n < TI_EHCI_NPORTS; n++) { 124 phy = fdtbus_phy_get_index(phandle, n); 125 if (phy && fdtbus_phy_enable(phy, true) != 0) { 126 aprint_error(": couldn't enable phy\n"); 127 return; 128 } 129 } 130 131 /* Disable interrupts */ 132 sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH); 133 EOWRITE4(sc, EHCI_USBINTR, 0); 134 135 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 136 aprint_error_dev(self, "failed to decode interrupt\n"); 137 return; 138 } 139 140 ih = fdtbus_intr_establish_xname(phandle, 0, IPL_USB, FDT_INTR_MPSAFE, 141 ehci_intr, sc, device_xname(self)); 142 if (ih == NULL) { 143 aprint_error_dev(self, "couldn't establish interrupt on %s\n", 144 intrstr); 145 return; 146 } 147 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 148 149 error = ehci_init(sc); 150 if (error) { 151 aprint_error_dev(self, "init failed, error = %d\n", error); 152 return; 153 } 154 155 pmf_device_register1(self, NULL, NULL, ehci_shutdown); 156 157 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint); 158} 159