1/*	$NetBSD: zusb.c,v 1.5 2011/06/19 16:20:09 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 1.5 2011/06/19 16:20:09 nonaka 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
54struct 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
64static int	zusb_match(device_t, cfdata_t, void *);
65static void	zusb_attach(device_t, device_t, void *);
66
67CFATTACH_DECL_NEW(zusb, sizeof(struct zusb_softc),
68    zusb_match, zusb_attach, NULL, NULL);
69
70static int	zusb_client_intr(void *);
71static int	zusb_host_intr(void *);
72static void	zusb_test_and_enabled_host_port(struct zusb_softc *);
73
74static int
75zusb_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
83static void
84zusb_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
118static int
119zusb_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
129static int
130zusb_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
140static void
141zusb_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