1/* $NetBSD: epohci.c,v 1.11 2021/08/07 16:18:43 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 2004 Jesse Off 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, 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/* 30 * USB Open Host Controller driver. 31 * 32 * OHCI spec: ftp://ftp.compaq.com/pub/supportinformation/papers/hcir1_0a.exe 33 * USB spec: http://www.usb.org/developers/data/usb11.pdf 34 */ 35 36#include <sys/cdefs.h> 37__KERNEL_RCSID(0, "$NetBSD: epohci.c,v 1.11 2021/08/07 16:18:43 thorpej Exp $"); 38 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/kernel.h> 42#include <sys/device.h> 43#include <sys/proc.h> 44#include <sys/queue.h> 45 46/* busdma */ 47#include <sys/mbuf.h> 48#include <uvm/uvm_extern.h> 49 50#include <sys/bus.h> 51 52#include <dev/usb/usb.h> 53#include <dev/usb/usbdi.h> 54#include <dev/usb/usbdivar.h> 55#include <dev/usb/usb_mem.h> 56 57#include <dev/usb/ohcireg.h> 58#include <dev/usb/ohcivar.h> 59 60#include <arm/ep93xx/ep93xxreg.h> 61#include <arm/ep93xx/ep93xxvar.h> 62#include <arm/ep93xx/epsocvar.h> 63 64int epohci_match(device_t, cfdata_t, void *); 65void epohci_attach(device_t, device_t, void *); 66void epohci_callback(device_t); 67 68struct epohci_softc { 69 struct ohci_softc sc; 70 void *sc_ih; 71 int sc_intr; 72}; 73 74CFATTACH_DECL_NEW(epohci, sizeof(struct epohci_softc), 75 epohci_match, epohci_attach, NULL, NULL); 76 77int 78epohci_match(device_t parent, cfdata_t match, void *aux) 79{ 80 /* EP93xx builtin OHCI module */ 81 82 return 1; 83} 84 85void 86epohci_attach(device_t parent, device_t self, void *aux) 87{ 88 struct epohci_softc *sc = device_private(self); 89 struct epsoc_attach_args *sa = aux; 90 uint32_t i; 91 bus_space_handle_t syscon_ioh; 92 93 sc->sc.sc_dev = self; 94 sc->sc.sc_bus.ub_hcpriv = sc; 95 96 sc->sc.iot = sa->sa_iot; 97 sc->sc.sc_bus.ub_dmatag = sa->sa_dmat; 98 sc->sc_intr = sa->sa_intr; 99 100 /* Map I/O space */ 101 if (bus_space_map(sc->sc.iot, sa->sa_addr, sa->sa_size, 102 0, &sc->sc.ioh)) { 103 printf(": cannot map mem space\n"); 104 return; 105 } 106 107 /* Enable hclk clock gating to the USB block. */ 108 109 bus_space_map(sc->sc.iot, EP93XX_APB_HWBASE + EP93XX_APB_SYSCON, 110 EP93XX_APB_SYSCON_SIZE, 0, &syscon_ioh); 111 i = bus_space_read_4(sc->sc.iot, syscon_ioh, EP93XX_SYSCON_PwrCnt); 112 i |= 0x10000000; 113 bus_space_write_4(sc->sc.iot, syscon_ioh, EP93XX_SYSCON_PwrCnt, i); 114 115 /* 116 * Not sure if I understand the datasheet here, but we must wait a 117 * few instructions and also make certain PLL2 is stable before 118 * continuing. Hopefully, the check for PLL2 is enough, as the 119 * datasheet is elusive to actually how many insns we need. 120 */ 121 122 do { 123 i = bus_space_read_4(sc->sc.iot, syscon_ioh, 124 EP93XX_SYSCON_PwrSts); 125 } while ((i & 0x100) == 0); 126 bus_space_unmap(sc->sc.iot, syscon_ioh, EP93XX_APB_SYSCON_SIZE); 127 128 printf("\n"); 129 130 /* Defer the rest until later */ 131 config_defer(self, epohci_callback); 132} 133 134void 135epohci_callback(device_t self) 136{ 137 struct epohci_softc *sc = device_private(self); 138 139 /* Disable interrupts, so we don't get any spurious ones. */ 140 bus_space_write_4(sc->sc.iot, sc->sc.ioh, OHCI_INTERRUPT_DISABLE, 141 OHCI_ALL_INTRS); 142 143 sc->sc_ih = ep93xx_intr_establish(sc->sc_intr, IPL_USB, 144 ohci_intr, sc); 145 int err = ohci_init(&sc->sc); 146 147 if (err) { 148 printf("%s: init failed, error=%d\n", device_xname(self), err); 149 150 ep93xx_intr_disestablish(sc->sc_ih); 151 return; 152 } 153 154 /* Attach usb device. */ 155 sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint, 156 CFARGS_NONE); 157 158} 159