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pxa2x0_udc.c revision 1.1 
      1 /*	$NetBSD: pxa2x0_udc.c,v 1.1 2006/12/17 16:03:33 peter 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 
     56 	if (CPU_IS_PXA270)
     57 		return 1;
     58 	return 0;
     59 }
     60 
     61 static void
     62 pxaudc_attach(struct device *parent, struct device *self, void *aux)
     63 {
     64 	struct pxaudc_softc *sc = (struct pxaudc_softc *)self;
     65 	struct pxaip_attach_args *pxa = (struct pxaip_attach_args *)aux;
     66 
     67 	sc->sc_iot = pxa->pxa_iot;
     68 	sc->sc_size = 0;
     69 	sc->sc_powerhook = NULL;
     70 
     71 	if (bus_space_map(sc->sc_iot, PXA2X0_USBDC_BASE, PXA2X0_USBDC_SIZE, 0,
     72 	    &sc->sc_ioh)) {
     73 		aprint_error(": couldn't map memory space\n");
     74 		return;
     75 	}
     76 	sc->sc_size = PXA2X0_USBDC_SIZE;
     77 
     78 	printf(": PXA2x0 USB Device Controller\n");
     79 
     80 	bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_size,
     81 	    BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE);
     82 
     83 	pxa2x0_gpio_set_function(35, GPIO_ALT_FN_2_IN); /* USB_P2_1 */
     84 	pxa2x0_gpio_set_function(37, GPIO_ALT_FN_1_OUT); /* USB_P2_8 */
     85 	pxa2x0_gpio_set_function(41, GPIO_ALT_FN_2_IN); /* USB_P2_7 */
     86 	pxa2x0_gpio_set_function(89, GPIO_ALT_FN_2_OUT); /* USBHPEN<1> */
     87 	pxa2x0_gpio_set_function(120, GPIO_ALT_FN_2_OUT); /* USBHPEN<2> */
     88 
     89 	pxa2x0_clkman_config(CKEN_USBDC, 1);
     90 
     91 	pxaudc_enable(sc);
     92 
     93 	pxa2x0_gpio_set_bit(37); /* USB_P2_8 */
     94 
     95 	sc->sc_powerhook = powerhook_establish(sc->sc_dev.dv_xname,
     96 	    pxaudc_power, sc);
     97 	if (sc->sc_powerhook == NULL) {
     98 		aprint_error("%s: unable to establish powerhook.\n",
     99 		    sc->sc_dev.dv_xname);
    100 	}
    101 }
    102 
    103 static int
    104 pxaudc_detach(struct device *self, int flags)
    105 {
    106 	struct pxaudc_softc *sc = (struct pxaudc_softc *)self;
    107 
    108 	if (sc->sc_powerhook)
    109 		powerhook_disestablish(sc->sc_powerhook);
    110 
    111 	if (sc->sc_size) {
    112 		bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size);
    113 		sc->sc_size = 0;
    114 	}
    115 
    116 	return 0;
    117 }
    118 
    119 static void
    120 pxaudc_power(int why, void *arg)
    121 {
    122 	struct pxaudc_softc *sc = (struct pxaudc_softc *)arg;
    123 
    124 	switch (why) {
    125 	case PWR_RESUME:
    126 		pxaudc_enable(sc);
    127 		break;
    128 	}
    129 }
    130 
    131 static void
    132 pxaudc_enable(struct pxaudc_softc *sc)
    133 {
    134 	uint32_t hr;
    135 
    136 	/* disable the controller */
    137 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR);
    138 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCCR,
    139 	    hr & ~USBDC_UDCCR_UDE);
    140 
    141 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1);
    142 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UDCICR1,
    143 	    hr | USBDC_UDCICR1_IERS);
    144 
    145 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR, 0);
    146 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
    147 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    148 	    hr | USBDC_UP2OCR_HXS);
    149 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
    150 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    151 	    hr | USBDC_UP2OCR_HXOE);
    152 	hr = bus_space_read_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR);
    153 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    154 	    hr | USBDC_UP2OCR_DPPDE|USBDC_UP2OCR_DMPDE);
    155 }
    156