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pxa2x0_udc.c revision 1.1.56.1 
      1 /*	$NetBSD: pxa2x0_udc.c,v 1.1.56.1 2009/08/19 18:46:01 yamt 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 (at) 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 }
    151