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