sys/arch/arm/xscale/pxa2x0_udc.c

   1 /*      $NetBSD: pxa2x0_udc.c,v 1.2 2009/08/09 06:12:34 kiyohara Exp $  */
   2 /*      $OpenBSD: pxa27x_udc.c,v 1.5 2005/03/30 14:24:39 dlg Exp $ */
   3
   4 /*
   5  * Copyright (c) 2005 David Gwynne <dlg@openbsd.org>
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #include <sys/param.h>
  21 #include <sys/systm.h>
  22 #include <sys/device.h>
  23 #include <sys/kernel.h>
  24
  25 #include <machine/intr.h>
  26 #include <machine/bus.h>
  27
  28 #include <arm/xscale/pxa2x0cpu.h>
  29 #include <arm/xscale/pxa2x0reg.h>
  30 #include <arm/xscale/pxa2x0var.h>
  31 #include <arm/xscale/pxa2x0_gpio.h>
  32
  33 struct pxaudc_softc {
  34         struct device           sc_dev;
  35         bus_space_tag_t         sc_iot;
  36         bus_space_handle_t      sc_ioh;
  37         bus_size_t              sc_size;
  38
  39         void                    *sc_powerhook;
  40 };
  41
  42 static int      pxaudc_match(struct device *, struct cfdata *, void *);
  43 static void     pxaudc_attach(struct device *, struct device *, void *);
  44 static int      pxaudc_detach(struct device *, int);
  45
  46 CFATTACH_DECL(pxaudc, sizeof(struct pxaudc_softc),
  47     pxaudc_match, pxaudc_attach, pxaudc_detach, NULL);
  48
  49 static void     pxaudc_power(int, void *);
  50 static void     pxaudc_enable(struct pxaudc_softc *);
  51
  52 static int
  53 pxaudc_match(struct device *parent, struct cfdata *cf, void *aux)
  54 {
  55         struct pxaip_attach_args *pxa = aux;
  56
  57         if (CPU_IS_PXA270 && strcmp(pxa->pxa_name, cf->cf_name) == 0) {
  58                 pxa->pxa_size = PXA270_USBDC_SIZE;
  59                 return 1;
  60         }
  61         return 0;
  62 }
  63
  64 static void
  65 pxaudc_attach(struct device *parent, struct device *self, void *aux)
  66 {
  67         struct pxaudc_softc *sc = (struct pxaudc_softc *)self;
  68         struct pxaip_attach_args *pxa = (struct pxaip_attach_args *)aux;
  69
  70         sc->sc_iot = pxa->pxa_iot;
  71         sc->sc_size = 0;
  72         sc->sc_powerhook = NULL;
  73
  74         if (bus_space_map(sc->sc_iot, pxa->pxa_addr, pxa->pxa_size, 0,
  75             &sc->sc_ioh)) {
  76                 aprint_error(": couldn't map memory space\n");
  77                 return;
  78         }
  79         sc->sc_size = pxa->pxa_size;
  80
  81         printf(": PXA2x0 USB Device Controller\n");
  82
  83         bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_size,
  84             BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE);
  85
  86         pxa2x0_clkman_config(CKEN_USBDC, 1);
  87
  88         pxaudc_enable(sc);
  89
  90         sc->sc_powerhook = powerhook_establish(sc->sc_dev.dv_xname,
  91             pxaudc_power, sc);
  92         if (sc->sc_powerhook == NULL) {
  93                 aprint_error("%s: unable to establish powerhook.\n",
  94                     sc->sc_dev.dv_xname);
  95         }
  96 }
  97
  98 static int
  99 pxaudc_detach(struct device *self, int flags)
 100 {
 101         struct pxaudc_softc *sc = (struct pxaudc_softc *)self;
 102
 103         if (sc->sc_powerhook)
 104                 powerhook_disestablish(sc->sc_powerhook);
 105
 106         if (sc->sc_size) {
 107                 bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size);
 108                 sc->sc_size = 0;
 109         }
 110
 111         return 0;
 112 }
 113
 114 static void
 115 pxaudc_power(int why, void *arg)
 116 {
 117         struct pxaudc_softc *sc = (struct pxaudc_softc *)arg;
 118
 119         switch (why) {
 120         case PWR_RESUME:
 121                 pxaudc_enable(sc);
 122                 break;
 123         }
 124 }
 125
 126 static void
 127 pxaudc_enable(struct pxaudc_softc *sc)
 128 {
 129         uint32_t hr;
 130
 131         /* disable the controller */
 132         hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR);
 133         bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR,
 134             hr & ~USBDC_UDCCR_UDE);
 135
 136         hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1);
 137         bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1,
 138             hr | USBDC_UDCICR1_IERS);
 139
 140         bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR, 0);
 141         hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
 142         bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
 143             hr | USBDC_UP2OCR_HXS);
 144         hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
 145         bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
 146             hr | USBDC_UP2OCR_HXOE);
 147         hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
 148         bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
 149             hr | USBDC_UP2OCR_DPPDE|USBDC_UP2OCR_DMPDE);
 150 }