xref: /netbsd-src/sys/arch/arm/xscale/pxa2x0_ohci.c (revision 8ac07aec990b9d2e483062509d0a9fa5b4f57cf2)
1 /*	$NetBSD: pxa2x0_ohci.c,v 1.3 2008/04/04 17:44:43 drochner Exp $	*/
2 /*	$OpenBSD: pxa2x0_ohci.c,v 1.19 2005/04/08 02:32:54 dlg Exp $ */
3 
4 /*
5  * Copyright (c) 2005 David Gwynne <dlg@openbsd.org>
6  *
7  * Permission to use, copy, modify, and distribute this software for any
8  * purpose with or without fee is hereby granted, provided that the above
9  * copyright notice and this permission notice appear in all copies.
10  *
11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18  */
19 
20 #include <sys/param.h>
21 #include <sys/systm.h>
22 #include <sys/device.h>
23 #include <sys/kernel.h>
24 
25 #include <machine/intr.h>
26 #include <machine/bus.h>
27 
28 #include <dev/usb/usb.h>
29 #include <dev/usb/usbdi.h>
30 #include <dev/usb/usbdivar.h>
31 #include <dev/usb/usb_mem.h>
32 
33 #include <dev/usb/ohcireg.h>
34 #include <dev/usb/ohcivar.h>
35 
36 #include <arm/xscale/pxa2x0cpu.h>
37 #include <arm/xscale/pxa2x0reg.h>
38 #include <arm/xscale/pxa2x0var.h>
39 #include <arm/xscale/pxa2x0_gpio.h>
40 
41 struct pxaohci_softc {
42 	ohci_softc_t	sc;
43 
44 	void		*sc_ih;
45 };
46 
47 #if 0
48 static void	pxaohci_power(int, void *);
49 #endif
50 static void	pxaohci_enable(struct pxaohci_softc *);
51 static void	pxaohci_disable(struct pxaohci_softc *);
52 
53 #define	HREAD4(sc,r)	bus_space_read_4((sc)->sc.iot, (sc)->sc.ioh, (r))
54 #define	HWRITE4(sc,r,v)	bus_space_write_4((sc)->sc.iot, (sc)->sc.ioh, (r), (v))
55 
56 static int
57 pxaohci_match(device_t parent, struct cfdata *cf, void *aux)
58 {
59 
60 	if (CPU_IS_PXA270)
61 		return 1;
62 	return 0;
63 }
64 
65 static void
66 pxaohci_attach(device_t parent, device_t self, void *aux)
67 {
68 	struct pxaohci_softc *sc = device_private(self);
69 	struct pxaip_attach_args *pxa = aux;
70 	usbd_status r;
71 	const char *devname = device_xname(self);
72 
73 #ifdef USB_DEBUG
74 	{
75 		//extern int ohcidebug;
76 		//ohcidebug = 16;
77 	}
78 #endif
79 
80 	sc->sc.iot = pxa->pxa_iot;
81 	sc->sc.sc_bus.dmatag = pxa->pxa_dmat;
82 	sc->sc.sc_size = 0;
83 	sc->sc_ih = NULL;
84 	sc->sc.sc_dev = self;
85 	sc->sc.sc_bus.hci_private = sc;
86 
87 	/* Map I/O space */
88 	if (bus_space_map(sc->sc.iot, PXA2X0_USBHC_BASE, PXA2X0_USBHC_SIZE, 0,
89 	    &sc->sc.ioh)) {
90 		aprint_error(": couldn't map memory space\n");
91 		return;
92 	}
93 	sc->sc.sc_size = PXA2X0_USBHC_SIZE;
94 
95 	/* XXX copied from ohci_pci.c. needed? */
96 	bus_space_barrier(sc->sc.iot, sc->sc.ioh, 0, sc->sc.sc_size,
97 	    BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE);
98 
99 	/* start the usb clock */
100 	pxa2x0_clkman_config(CKEN_USBHC, 1);
101 	pxaohci_enable(sc);
102 
103 	/* Disable interrupts, so we don't get any spurious ones. */
104 	bus_space_write_4(sc->sc.iot, sc->sc.ioh, OHCI_INTERRUPT_DISABLE,
105 	    OHCI_MIE);
106 
107 	sc->sc_ih = pxa2x0_intr_establish(PXA2X0_INT_USBH1, IPL_USB,
108 	    ohci_intr, &sc->sc);
109 	if (sc->sc_ih == NULL) {
110 		aprint_error(": unable to establish interrupt\n");
111 		goto free_map;
112 	}
113 
114 	strlcpy(sc->sc.sc_vendor, "PXA27x", sizeof(sc->sc.sc_vendor));
115 	r = ohci_init(&sc->sc);
116 	if (r != USBD_NORMAL_COMPLETION) {
117 		aprint_error("%s: init failed, error=%d\n",
118 		    devname, r);
119 		goto free_intr;
120 	}
121 
122 #if 0
123 	sc->sc.sc_powerhook = powerhook_establish(sc->sc.sc_bus.bdev.dv_xname,
124 	    pxaohci_power, sc);
125 	if (sc->sc.sc_powerhook == NULL) {
126 		aprint_error("%s: cannot establish powerhook\n",
127 		    sc->sc.sc_bus.bdev.dv_xname);
128 	}
129 #endif
130 
131 	sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint);
132 
133 	return;
134 
135 free_intr:
136 	pxa2x0_intr_disestablish(sc->sc_ih);
137 	sc->sc_ih = NULL;
138 free_map:
139 	pxaohci_disable(sc);
140 	pxa2x0_clkman_config(CKEN_USBHC, 0);
141 	bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
142 	sc->sc.sc_size = 0;
143 }
144 
145 static int
146 pxaohci_detach(device_t self, int flags)
147 {
148 	struct pxaohci_softc *sc = device_private(self);
149 	int error;
150 
151 	error = ohci_detach(&sc->sc, flags);
152 	if (error)
153 		return error;
154 
155 #if 0
156 	if (sc->sc.sc_powerhook) {
157 		powerhook_disestablish(sc->sc.sc_powerhook);
158 		sc->sc.sc_powerhook = NULL;
159 	}
160 #endif
161 
162 	if (sc->sc_ih) {
163 		pxa2x0_intr_disestablish(sc->sc_ih);
164 		sc->sc_ih = NULL;
165 	}
166 
167 	pxaohci_disable(sc);
168 
169 	/* stop clock */
170 	pxa2x0_clkman_config(CKEN_USBHC, 0);
171 
172 	if (sc->sc.sc_size) {
173 		bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
174 		sc->sc.sc_size = 0;
175 	}
176 
177 	return 0;
178 }
179 
180 #if 0
181 static void
182 pxaohci_power(int why, void *arg)
183 {
184 	struct pxaohci_softc *sc = (struct pxaohci_softc *)arg;
185 	int s;
186 
187 	s = splhardusb();
188 	sc->sc.sc_bus.use_polling++;
189 	switch (why) {
190 	case PWR_STANDBY:
191 	case PWR_SUSPEND:
192 #if 0
193 		ohci_power(why, &sc->sc);
194 #endif
195 		pxa2x0_clkman_config(CKEN_USBHC, 0);
196 		break;
197 
198 	case PWR_RESUME:
199 		pxa2x0_clkman_config(CKEN_USBHC, 1);
200 		pxaohci_enable(sc);
201 #if 0
202 		ohci_power(why, &sc->sc);
203 #endif
204 		break;
205 	}
206 	sc->sc.sc_bus.use_polling--;
207 	splx(s);
208 }
209 #endif
210 
211 static void
212 pxaohci_enable(struct pxaohci_softc *sc)
213 {
214 	uint32_t hr;
215 
216 	/* Full host reset */
217 	hr = HREAD4(sc, USBHC_HR);
218 	HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) | USBHC_HR_FHR);
219 
220 	DELAY(USBHC_RST_WAIT);
221 
222 	hr = HREAD4(sc, USBHC_HR);
223 	HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) & ~(USBHC_HR_FHR));
224 
225 	/* Force system bus interface reset */
226 	hr = HREAD4(sc, USBHC_HR);
227 	HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) | USBHC_HR_FSBIR);
228 
229 	while (HREAD4(sc, USBHC_HR) & USBHC_HR_FSBIR)
230 		DELAY(3);
231 
232 	/* Enable the ports (physically only one, only enable that one?) */
233 	hr = HREAD4(sc, USBHC_HR);
234 	HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) & ~(USBHC_HR_SSE));
235 	hr = HREAD4(sc, USBHC_HR);
236 	HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) & ~(USBHC_HR_SSEP2));
237 }
238 
239 static void
240 pxaohci_disable(struct pxaohci_softc *sc)
241 {
242 	uint32_t hr;
243 
244 	/* Full host reset */
245 	hr = HREAD4(sc, USBHC_HR);
246 	HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) | USBHC_HR_FHR);
247 
248 	DELAY(USBHC_RST_WAIT);
249 
250 	hr = HREAD4(sc, USBHC_HR);
251 	HWRITE4(sc, USBHC_HR, (hr & USBHC_HR_MASK) & ~(USBHC_HR_FHR));
252 }
253 
254 
255 CFATTACH_DECL2_NEW(pxaohci, sizeof(struct pxaohci_softc),
256     pxaohci_match, pxaohci_attach, pxaohci_detach, ohci_activate, NULL,
257     ohci_childdet);
258 
259 
260