xref: /netbsd-src/sys/arch/zaurus/dev/zusb.c (revision 5410d57726d89c2e9fae69fa80aa898238c19a4f)
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
zusb_match(device_t parent,cfdata_t cf,void * aux)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
zusb_attach(device_t parent,device_t self,void * aux)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
zusb_client_intr(void * v)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
zusb_host_intr(void * v)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
zusb_test_and_enabled_host_port(struct zusb_softc * sc)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