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zusb.c revision 1.2 
      1 /*	$NetBSD: zusb.c,v 1.2 2009/01/28 14:06:15 nonaka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2008 Christopher Gilbert
      5  * All rights reserved.
      6  *
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  * 3. The name of the company nor the name of the author may be used to
     13  *    endorse or promote products derived from this software without specific
     14  *    prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     22  * 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 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: zusb.c,v 1.2 2009/01/28 14:06:15 nonaka Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/device.h>
     34 #include <sys/kernel.h>
     35 
     36 #include <arm/xscale/pxa2x0reg.h>
     37 #include <arm/xscale/pxa2x0var.h>
     38 #include <arm/xscale/pxa2x0_gpio.h>
     39 
     40 #include <machine/intr.h>
     41 #include <machine/bus.h>
     42 
     43 #include <zaurus/zaurus/zaurus_reg.h>
     44 #include <zaurus/zaurus/zaurus_var.h>
     45 
     46 
     47 #ifdef ZUSB_DEBUG
     48 #define	DPRINTF(s)	printf s
     49 #else
     50 #define	DPRINTF(s)
     51 #endif
     52 
     53 
     54 struct zusb_softc {
     55 	struct device sc_dev;
     56 
     57 	bus_space_tag_t sc_iot;
     58 	bus_space_handle_t sc_ioh;
     59 
     60 	void *sc_client_ih;
     61 	void *sc_host_ih;
     62 };
     63 
     64 static int	zusb_match(struct device *, struct cfdata *, void *);
     65 static void	zusb_attach(struct device *, struct device *, void *);
     66 
     67 CFATTACH_DECL(zusb, sizeof(struct zusb_softc),
     68     zusb_match, zusb_attach, NULL, NULL);
     69 
     70 static int	zusb_client_intr(void *);
     71 static int	zusb_host_intr(void *);
     72 static void	zusb_test_and_enabled_host_port(struct zusb_softc *);
     73 
     74 static int
     75 zusb_match(struct device *parent, struct cfdata *cf, void *aux)
     76 {
     77 
     78 	if (ZAURUS_ISC3000)
     79 		return 1;
     80 	return 0;
     81 }
     82 
     83 static void
     84 zusb_attach(struct device *parent, struct device *self, void *aux)
     85 {
     86 	struct zusb_softc *sc = (struct zusb_softc *)self;
     87 	struct pxaip_attach_args *pxa = aux;
     88 
     89 	aprint_normal(": USB Mode detection\n");
     90 
     91 	sc->sc_iot = pxa->pxa_iot;
     92 
     93 	/* Map I/O space */
     94 	if (bus_space_map(sc->sc_iot, PXA2X0_USBDC_BASE, PXA270_USBDC_SIZE, 0,
     95 				&sc->sc_ioh)) {
     96 		aprint_error_dev(&sc->sc_dev, "couldn't map memory space\n");
     97 		return;
     98 	}
     99 
    100 	pxa2x0_gpio_set_function(C3000_USB_DEVICE_PIN, GPIO_IN);
    101 	sc->sc_client_ih = pxa2x0_gpio_intr_establish(C3000_USB_DEVICE_PIN,
    102 	    IST_EDGE_BOTH, IPL_BIO, zusb_client_intr, sc);
    103 
    104 	pxa2x0_gpio_set_function(C3000_USB_HOST_PIN, GPIO_IN);
    105 	sc->sc_host_ih = pxa2x0_gpio_intr_establish(C3000_USB_HOST_PIN,
    106 	    IST_EDGE_BOTH, IPL_BIO, zusb_host_intr, sc);
    107 
    108 	/* configure port 2 for input */
    109 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    110 			USBDC_UP2OCR_HXS | USBDC_UP2OCR_HXOE |
    111 			USBDC_UP2OCR_DPPDE | USBDC_UP2OCR_DMPDE);
    112 
    113 	zusb_test_and_enabled_host_port(sc);
    114 }
    115 
    116 static int
    117 zusb_client_intr(void *v)
    118 {
    119 	struct zusb_softc *sc = v;
    120 
    121 	DPRINTF(("%s: USB client cable changed\n", device_xname(&sc->sc_dev)));
    122 	zusb_test_and_enabled_host_port(sc);
    123 
    124 	return 1;
    125 }
    126 
    127 static int
    128 zusb_host_intr(void *v)
    129 {
    130 	struct zusb_softc *sc = v;
    131 
    132 	DPRINTF(("%s: USB host cable changed\n", device_xname(&sc->sc_dev)));
    133 	zusb_test_and_enabled_host_port(sc);
    134 
    135 	return 1;
    136 }
    137 
    138 static void
    139 zusb_test_and_enabled_host_port(struct zusb_softc *sc)
    140 {
    141 	int host_cable = pxa2x0_gpio_get_bit(C3000_USB_HOST_PIN);
    142 #ifdef ZUSB_DEBUG
    143 	int client_cable = pxa2x0_gpio_get_bit(C3000_USB_DEVICE_PIN);
    144 #endif
    145 
    146 	DPRINTF(("%s: USB cable: host %d, client %d\n",
    147 	    device_xname(&sc->sc_dev), host_cable, client_cable));
    148 
    149 	if (!host_cable) {
    150 		pxa2x0_gpio_set_function(C3000_USB_HOST_POWER_PIN,
    151 		    GPIO_OUT | GPIO_SET);
    152 		DPRINTF(("%s: USB host power enabled\n",
    153 		    device_xname(&sc->sc_dev)));
    154 	} else {
    155 		pxa2x0_gpio_set_function(C3000_USB_HOST_POWER_PIN,
    156 		    GPIO_OUT | GPIO_CLR);
    157 		DPRINTF(("%s: USB host power disabled\n",
    158 		    device_xname(&sc->sc_dev)));
    159 	}
    160 }
    161