Home | History | Annotate | Line # | Download | only in dev 
      1 /*	$NetBSD: zusb.c,v 1.6 2011/07/19 15:11:49 dyoung 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 1.6 2011/07/19 15:11:49 dyoung Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/device.h>
     34 #include <sys/kernel.h>
     35 #include <sys/bus.h>
     36 
     37 #include <arm/xscale/pxa2x0reg.h>
     38 #include <arm/xscale/pxa2x0var.h>
     39 #include <arm/xscale/pxa2x0_gpio.h>
     40 
     41 #include <machine/intr.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 	device_t 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(device_t, cfdata_t, void *);
     65 static void	zusb_attach(device_t, device_t, void *);
     66 
     67 CFATTACH_DECL_NEW(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(device_t parent, cfdata_t cf, void *aux)
     76 {
     77 
     78 	if (ZAURUS_ISC1000 || ZAURUS_ISC3000)
     79 		return 1;
     80 	return 0;
     81 }
     82 
     83 static void
     84 zusb_attach(device_t parent, device_t self, void *aux)
     85 {
     86 	struct zusb_softc *sc = device_private(self);
     87 	struct pxaip_attach_args *pxa = aux;
     88 
     89 	aprint_normal(": USB Mode detection\n");
     90 	aprint_naive("\n");
     91 
     92 	sc->sc_dev = self;
     93 	sc->sc_iot = pxa->pxa_iot;
     94 
     95 	/* Map I/O space */
     96 	if (bus_space_map(sc->sc_iot, PXA2X0_USBDC_BASE, PXA270_USBDC_SIZE, 0,
     97 				&sc->sc_ioh)) {
     98 		aprint_error_dev(sc->sc_dev, "couldn't map memory space\n");
     99 		return;
    100 	}
    101 
    102 	pxa2x0_gpio_set_function(C3000_USB_DEVICE_PIN, GPIO_IN);
    103 	sc->sc_client_ih = pxa2x0_gpio_intr_establish(C3000_USB_DEVICE_PIN,
    104 	    IST_EDGE_BOTH, IPL_BIO, zusb_client_intr, sc);
    105 
    106 	pxa2x0_gpio_set_function(C3000_USB_HOST_PIN, GPIO_IN);
    107 	sc->sc_host_ih = pxa2x0_gpio_intr_establish(C3000_USB_HOST_PIN,
    108 	    IST_EDGE_BOTH, IPL_BIO, zusb_host_intr, sc);
    109 
    110 	/* configure port 2 for input */
    111 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
    112 			USBDC_UP2OCR_HXS | USBDC_UP2OCR_HXOE |
    113 			USBDC_UP2OCR_DPPDE | USBDC_UP2OCR_DMPDE);
    114 
    115 	zusb_test_and_enabled_host_port(sc);
    116 }
    117 
    118 static int
    119 zusb_client_intr(void *v)
    120 {
    121 	struct zusb_softc *sc = v;
    122 
    123 	DPRINTF(("%s: USB client cable changed\n", device_xname(sc->sc_dev)));
    124 	zusb_test_and_enabled_host_port(sc);
    125 
    126 	return 1;
    127 }
    128 
    129 static int
    130 zusb_host_intr(void *v)
    131 {
    132 	struct zusb_softc *sc = v;
    133 
    134 	DPRINTF(("%s: USB host cable changed\n", device_xname(sc->sc_dev)));
    135 	zusb_test_and_enabled_host_port(sc);
    136 
    137 	return 1;
    138 }
    139 
    140 static void
    141 zusb_test_and_enabled_host_port(struct zusb_softc *sc)
    142 {
    143 	int host_cable = pxa2x0_gpio_get_bit(C3000_USB_HOST_PIN);
    144 #ifdef ZUSB_DEBUG
    145 	int client_cable = pxa2x0_gpio_get_bit(C3000_USB_DEVICE_PIN);
    146 #endif
    147 
    148 	DPRINTF(("%s: USB cable: host %d, client %d\n",
    149 	    device_xname(sc->sc_dev), host_cable, client_cable));
    150 
    151 	if (!host_cable) {
    152 		pxa2x0_gpio_set_function(C3000_USB_HOST_POWER_PIN,
    153 		    GPIO_OUT | GPIO_SET);
    154 		DPRINTF(("%s: USB host power enabled\n",
    155 		    device_xname(sc->sc_dev)));
    156 	} else {
    157 		pxa2x0_gpio_set_function(C3000_USB_HOST_POWER_PIN,
    158 		    GPIO_OUT | GPIO_CLR);
    159 		DPRINTF(("%s: USB host power disabled\n",
    160 		    device_xname(sc->sc_dev)));
    161 	}
    162 }
    163