sys/arch/arm/ep93xx/epohci.c

   1 /*      $NetBSD: epohci.c,v 1.3 2008/04/03 15:08:58 drochner 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 1.3 2008/04/03 15:08:58 drochner 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 <machine/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
  64 int epohci_match(struct device *, struct cfdata *, void *);
  65 void epohci_attach(struct device *, struct device *, void *);
  66 void epohci_callback(struct device *);
  67
  68 struct epohci_softc {
  69         struct ohci_softc sc;
  70         void    *sc_ih;
  71         int     sc_intr;
  72 };
  73
  74 CFATTACH_DECL_NEW(epohci, sizeof(struct epohci_softc),
  75     epohci_match, epohci_attach, NULL, NULL);
  76
  77 int
  78 epohci_match(struct device *parent, struct cfdata *match, void *aux)
  79 {
  80         /* EP93xx builtin OHCI module */
  81
  82         return (1);
  83 }
  84
  85 void
  86 epohci_attach(struct device *parent, struct device *self, void *aux)
  87 {
  88         struct epohci_softc *sc = device_private(self);
  89         struct epsoc_attach_args *sa = aux;
  90         u_int32_t i;
  91         bus_space_handle_t syscon_ioh;
  92
  93         sc->sc.sc_dev = self;
  94         sc->sc.sc_bus.hci_private = sc;
  95
  96         sc->sc.iot = sa->sa_iot;
  97         sc->sc.sc_bus.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
 134 void
 135 epohci_callback(struct device *self)
 136 {
 137         struct epohci_softc *sc = device_private(self);
 138         usbd_status r;
 139
 140         /* Disable interrupts, so we don't get any spurious ones. */
 141         bus_space_write_4(sc->sc.iot, sc->sc.ioh, OHCI_INTERRUPT_DISABLE,
 142                           OHCI_ALL_INTRS);
 143
 144         strlcpy(sc->sc.sc_vendor, "Cirrus Logic", sizeof sc->sc.sc_vendor);
 145
 146         sc->sc_ih = ep93xx_intr_establish(sc->sc_intr, IPL_USB,
 147                 ohci_intr, sc);
 148         r = ohci_init(&sc->sc);
 149
 150         if (r != USBD_NORMAL_COMPLETION) {
 151                 printf("%s: init failed, error=%d\n", device_xname(self), r);
 152
 153                 ep93xx_intr_disestablish(sc->sc_ih);
 154                 return;
 155         }
 156
 157         /* Attach usb device. */
 158         sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint);
 159
 160 }