a10_ehci.c revision 278278 
1/*-
2 * Copyright (c) 2012 Ganbold Tsagaankhuu <ganbold@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Allwinner A10 attachment driver for the USB Enhanced Host Controller.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: stable/10/sys/arm/allwinner/a10_ehci.c 278278 2015-02-05 20:03:02Z hselasky $");
33
34#include "opt_bus.h"
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/bus.h>
39#include <sys/rman.h>
40#include <sys/condvar.h>
41#include <sys/kernel.h>
42#include <sys/module.h>
43#include <sys/gpio.h>
44
45#include <machine/bus.h>
46#include <dev/ofw/ofw_bus.h>
47#include <dev/ofw/ofw_bus_subr.h>
48
49#include <dev/usb/usb.h>
50#include <dev/usb/usbdi.h>
51
52#include <dev/usb/usb_core.h>
53#include <dev/usb/usb_busdma.h>
54#include <dev/usb/usb_process.h>
55#include <dev/usb/usb_util.h>
56
57#include <dev/usb/usb_controller.h>
58#include <dev/usb/usb_bus.h>
59#include <dev/usb/controller/ehci.h>
60#include <dev/usb/controller/ehcireg.h>
61
62#include "gpio_if.h"
63
64#include "a10_clk.h"
65
66#define EHCI_HC_DEVSTR			"Allwinner Integrated USB 2.0 controller"
67
68#define SW_USB_PMU_IRQ_ENABLE		0x800
69
70#define SW_SDRAM_REG_HPCR_USB1		(0x250 + ((1 << 2) * 4))
71#define SW_SDRAM_REG_HPCR_USB2		(0x250 + ((1 << 2) * 5))
72#define SW_SDRAM_BP_HPCR_ACCESS		(1 << 0)
73
74#define SW_ULPI_BYPASS			(1 << 0)
75#define SW_AHB_INCRX_ALIGN		(1 << 8)
76#define SW_AHB_INCR4			(1 << 9)
77#define SW_AHB_INCR8			(1 << 10)
78#define GPIO_USB1_PWR			230
79#define GPIO_USB2_PWR			227
80
81#define A10_READ_4(sc, reg)		\
82	bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, reg)
83
84#define A10_WRITE_4(sc, reg, data)	\
85	bus_space_write_4((sc)->sc_io_tag, (sc)->sc_io_hdl, reg, data)
86
87static device_attach_t a10_ehci_attach;
88static device_detach_t a10_ehci_detach;
89
90bs_r_1_proto(reversed);
91bs_w_1_proto(reversed);
92
93static int
94a10_ehci_probe(device_t self)
95{
96
97	if (!ofw_bus_status_okay(self))
98		return (ENXIO);
99
100	if (!ofw_bus_is_compatible(self, "allwinner,usb-ehci"))
101		return (ENXIO);
102
103	device_set_desc(self, EHCI_HC_DEVSTR);
104
105	return (BUS_PROBE_DEFAULT);
106}
107
108static int
109a10_ehci_attach(device_t self)
110{
111	ehci_softc_t *sc = device_get_softc(self);
112	bus_space_handle_t bsh;
113	device_t sc_gpio_dev;
114	int err;
115	int rid;
116	uint32_t reg_value = 0;
117
118	/* initialise some bus fields */
119	sc->sc_bus.parent = self;
120	sc->sc_bus.devices = sc->sc_devices;
121	sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
122	sc->sc_bus.dma_bits = 32;
123
124	/* get all DMA memory */
125	if (usb_bus_mem_alloc_all(&sc->sc_bus,
126	    USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
127		return (ENOMEM);
128	}
129
130	sc->sc_bus.usbrev = USB_REV_2_0;
131
132	rid = 0;
133	sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
134	if (!sc->sc_io_res) {
135		device_printf(self, "Could not map memory\n");
136		goto error;
137	}
138
139	sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
140	sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
141	bsh = rman_get_bushandle(sc->sc_io_res);
142
143	sc->sc_io_size = rman_get_size(sc->sc_io_res);
144
145	if (bus_space_subregion(sc->sc_io_tag, bsh, 0x00,
146	    sc->sc_io_size, &sc->sc_io_hdl) != 0)
147		panic("%s: unable to subregion USB host registers",
148		    device_get_name(self));
149
150	rid = 0;
151	sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
152	    RF_SHAREABLE | RF_ACTIVE);
153	if (sc->sc_irq_res == NULL) {
154		device_printf(self, "Could not allocate irq\n");
155		goto error;
156	}
157	sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
158	if (!sc->sc_bus.bdev) {
159		device_printf(self, "Could not add USB device\n");
160		goto error;
161	}
162	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
163	device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
164
165	sprintf(sc->sc_vendor, "Allwinner");
166
167        /* Get the GPIO device, we need this to give power to USB */
168	sc_gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
169	if (sc_gpio_dev == NULL) {
170		device_printf(self, "Error: failed to get the GPIO device\n");
171		goto error;
172	}
173
174	err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
175	    NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
176	if (err) {
177		device_printf(self, "Could not setup irq, %d\n", err);
178		sc->sc_intr_hdl = NULL;
179		goto error;
180	}
181
182	sc->sc_flags |= EHCI_SCFLG_DONTRESET;
183
184	/* Enable clock for USB */
185	a10_clk_usb_activate();
186
187	/* Give power to USB */
188	GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB2_PWR, GPIO_PIN_OUTPUT);
189	GPIO_PIN_SET(sc_gpio_dev, GPIO_USB2_PWR, GPIO_PIN_HIGH);
190
191	/* Give power to USB */
192	GPIO_PIN_SETFLAGS(sc_gpio_dev, GPIO_USB1_PWR, GPIO_PIN_OUTPUT);
193	GPIO_PIN_SET(sc_gpio_dev, GPIO_USB1_PWR, GPIO_PIN_HIGH);
194
195	/* Enable passby */
196	reg_value = A10_READ_4(sc, SW_USB_PMU_IRQ_ENABLE);
197	reg_value |= SW_AHB_INCR8; /* AHB INCR8 enable */
198	reg_value |= SW_AHB_INCR4; /* AHB burst type INCR4 enable */
199	reg_value |= SW_AHB_INCRX_ALIGN; /* AHB INCRX align enable */
200	reg_value |= SW_ULPI_BYPASS; /* ULPI bypass enable */
201	A10_WRITE_4(sc, SW_USB_PMU_IRQ_ENABLE, reg_value);
202
203	/* Configure port */
204	reg_value = A10_READ_4(sc, SW_SDRAM_REG_HPCR_USB2);
205	reg_value |= SW_SDRAM_BP_HPCR_ACCESS;
206	A10_WRITE_4(sc, SW_SDRAM_REG_HPCR_USB2, reg_value);
207
208	err = ehci_init(sc);
209	if (!err) {
210		err = device_probe_and_attach(sc->sc_bus.bdev);
211	}
212	if (err) {
213		device_printf(self, "USB init failed err=%d\n", err);
214		goto error;
215	}
216	return (0);
217
218error:
219	a10_ehci_detach(self);
220	return (ENXIO);
221}
222
223static int
224a10_ehci_detach(device_t self)
225{
226	ehci_softc_t *sc = device_get_softc(self);
227	device_t bdev;
228	int err;
229	uint32_t reg_value = 0;
230
231	if (sc->sc_bus.bdev) {
232		bdev = sc->sc_bus.bdev;
233		device_detach(bdev);
234		device_delete_child(self, bdev);
235	}
236	/* during module unload there are lots of children leftover */
237	device_delete_children(self);
238
239	if (sc->sc_irq_res && sc->sc_intr_hdl) {
240		/*
241		 * only call ehci_detach() after ehci_init()
242		 */
243		ehci_detach(sc);
244
245		err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
246
247		if (err)
248			/* XXX or should we panic? */
249			device_printf(self, "Could not tear down irq, %d\n",
250			    err);
251		sc->sc_intr_hdl = NULL;
252	}
253
254	if (sc->sc_irq_res) {
255		bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
256		sc->sc_irq_res = NULL;
257	}
258	if (sc->sc_io_res) {
259		bus_release_resource(self, SYS_RES_MEMORY, 0,
260		    sc->sc_io_res);
261		sc->sc_io_res = NULL;
262	}
263	usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
264
265	/* Disable configure port */
266	reg_value = A10_READ_4(sc, SW_SDRAM_REG_HPCR_USB2);
267	reg_value &= ~SW_SDRAM_BP_HPCR_ACCESS;
268	A10_WRITE_4(sc, SW_SDRAM_REG_HPCR_USB2, reg_value);
269
270	/* Disable passby */
271	reg_value = A10_READ_4(sc, SW_USB_PMU_IRQ_ENABLE);
272	reg_value &= ~SW_AHB_INCR8; /* AHB INCR8 disable */
273	reg_value &= ~SW_AHB_INCR4; /* AHB burst type INCR4 disable */
274	reg_value &= ~SW_AHB_INCRX_ALIGN; /* AHB INCRX align disable */
275	reg_value &= ~SW_ULPI_BYPASS; /* ULPI bypass disable */
276	A10_WRITE_4(sc, SW_USB_PMU_IRQ_ENABLE, reg_value);
277
278	/* Disable clock for USB */
279	a10_clk_usb_deactivate();
280
281	return (0);
282}
283
284static device_method_t ehci_methods[] = {
285	/* Device interface */
286	DEVMETHOD(device_probe, a10_ehci_probe),
287	DEVMETHOD(device_attach, a10_ehci_attach),
288	DEVMETHOD(device_detach, a10_ehci_detach),
289	DEVMETHOD(device_suspend, bus_generic_suspend),
290	DEVMETHOD(device_resume, bus_generic_resume),
291	DEVMETHOD(device_shutdown, bus_generic_shutdown),
292
293	DEVMETHOD_END
294};
295
296static driver_t ehci_driver = {
297	.name = "ehci",
298	.methods = ehci_methods,
299	.size = sizeof(ehci_softc_t),
300};
301
302static devclass_t ehci_devclass;
303
304DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
305MODULE_DEPEND(ehci, usb, 1, 1, 1);
306