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      1 /*	$NetBSD: pxa2x0_udc.c,v 1.5 2011/07/01 20:32:51 dyoung 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 <sys/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 	device_t		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(device_t, cfdata_t, void *);
     43 static void	pxaudc_attach(device_t, device_t, void *);
     44 static int	pxaudc_detach(device_t, int);
     45 
     46 CFATTACH_DECL_NEW(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(device_t parent, cfdata_t 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(device_t parent, device_t self, void *aux)
     66 {
     67 	struct pxaudc_softc *sc = device_private(self);
     68 	struct pxaip_attach_args *pxa = (struct pxaip_attach_args *)aux;
     69 
     70 	sc->sc_dev = self;
     71 	sc->sc_iot = pxa->pxa_iot;
     72 	sc->sc_size = 0;
     73 	sc->sc_powerhook = NULL;
     74 
     75 	aprint_normal(": USB Device Controller\n");
     76 	aprint_naive("\n");
     77 
     78 	if (bus_space_map(sc->sc_iot, pxa->pxa_addr, pxa->pxa_size, 0,
     79 	    &sc->sc_ioh)) {
     80 		aprint_error_dev(self, "couldn't map memory space\n");
     81 		return;
     82 	}
     83 	sc->sc_size = pxa->pxa_size;
     84 
     85 	bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_size,
     86 	    BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE);
     87 
     88 	pxa2x0_clkman_config(CKEN_USBDC, 1);
     89 
     90 	pxaudc_enable(sc);
     91 
     92 	sc->sc_powerhook = powerhook_establish(device_xname(self),
     93 	    pxaudc_power, sc);
     94 	if (sc->sc_powerhook == NULL) {
     95 		aprint_error_dev(self, "unable to establish powerhook.\n");
     96 	}
     97 }
     98 
     99 static int
    100 pxaudc_detach(device_t self, int flags)
    101 {
    102 	struct pxaudc_softc *sc = device_private(self);
    103 
    104 	if (sc->sc_powerhook)
    105 		powerhook_disestablish(sc->sc_powerhook);
    106 
    107 	if (sc->sc_size) {
    108 		bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size);
    109 		sc->sc_size = 0;
    110 	}
    111 
    112 	return 0;
    113 }
    114 
    115 static void
    116 pxaudc_power(int why, void *arg)
    117 {
    118 	struct pxaudc_softc *sc = (struct pxaudc_softc *)arg;
    119 
    120 	switch (why) {
    121 	case PWR_RESUME:
    122 		pxaudc_enable(sc);
    123 		break;
    124 	}
    125 }
    126 
    127 static void
    128 pxaudc_enable(struct pxaudc_softc *sc)
    129 {
    130 	uint32_t hr;
    131 
    132 	/* disable the controller */
    133 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR);
    134 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR,
    135 	    hr & ~USBDC_UDCCR_UDE);
    136 
    137 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1);
    138 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1,
    139 	    hr | USBDC_UDCICR1_IERS);
    140 
    141 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR, 0);
    142 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
    143 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    144 	    hr | USBDC_UP2OCR_HXS);
    145 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
    146 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    147 	    hr | USBDC_UP2OCR_HXOE);
    148 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
    149 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    150 	    hr | USBDC_UP2OCR_DPPDE|USBDC_UP2OCR_DMPDE);
    151 }
    152