5 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
7 * Copyright (c) 2007-2008 Hans Petter Selasky. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/stdint.h>
32 #include <sys/stddef.h>
33 #include <sys/param.h>
34 #include <sys/queue.h>
35 #include <sys/types.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
39 #include <sys/module.h>
41 #include <sys/mutex.h>
42 #include <sys/condvar.h>
43 #include <sys/sysctl.h>
45 #include <sys/unistd.h>
46 #include <sys/callout.h>
47 #include <sys/malloc.h>
50 #include <dev/usb/usb.h>
51 #include <dev/usb/usbdi.h>
53 #include <dev/usb/usb_core.h>
54 #include <dev/usb/usb_busdma.h>
55 #include <dev/usb/usb_process.h>
56 #include <dev/usb/usb_util.h>
58 #include <dev/usb/usb_controller.h>
59 #include <dev/usb/usb_bus.h>
60 #include <dev/usb/controller/at91dci.h>
64 #include <arm/at91/at91_pmcvar.h>
65 #include <arm/at91/at91rm92reg.h>
66 #include <arm/at91/at91_pioreg.h>
67 #include <arm/at91/at91_piovar.h>
69 #include <dev/fdt/fdt_common.h>
70 #include <dev/ofw/ofw_bus.h>
71 #include <dev/ofw/ofw_bus_subr.h>
75 /* Pin Definitions - do they belong here or somewhere else ? -- YES! */
77 #define VBUS_MASK AT91C_PIO_PB24
78 #define VBUS_BASE AT91RM92_PIOB_BASE
80 #define PULLUP_MASK AT91C_PIO_PB22
81 #define PULLUP_BASE AT91RM92_PIOB_BASE
83 static device_probe_t at91_udp_probe;
84 static device_attach_t at91_udp_attach;
85 static device_detach_t at91_udp_detach;
87 struct at91_udp_softc {
88 struct at91dci_softc sc_dci; /* must be first */
89 struct at91_pmc_clock *sc_mclk;
90 struct at91_pmc_clock *sc_iclk;
91 struct at91_pmc_clock *sc_fclk;
92 struct callout sc_vbus;
96 at91_vbus_poll(struct at91_udp_softc *sc)
100 vbus_val = at91_pio_gpio_get(VBUS_BASE, VBUS_MASK) != 0;
101 at91dci_vbus_interrupt(&sc->sc_dci, vbus_val);
103 callout_reset(&sc->sc_vbus, hz, (void *)&at91_vbus_poll, sc);
107 at91_udp_clocks_on(void *arg)
109 struct at91_udp_softc *sc = arg;
111 at91_pmc_clock_enable(sc->sc_mclk);
112 at91_pmc_clock_enable(sc->sc_iclk);
113 at91_pmc_clock_enable(sc->sc_fclk);
117 at91_udp_clocks_off(void *arg)
119 struct at91_udp_softc *sc = arg;
121 at91_pmc_clock_disable(sc->sc_fclk);
122 at91_pmc_clock_disable(sc->sc_iclk);
123 at91_pmc_clock_disable(sc->sc_mclk);
127 at91_udp_pull_up(void *arg)
129 at91_pio_gpio_set(PULLUP_BASE, PULLUP_MASK);
133 at91_udp_pull_down(void *arg)
135 at91_pio_gpio_clear(PULLUP_BASE, PULLUP_MASK);
139 at91_udp_probe(device_t dev)
141 if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-udc"))
143 device_set_desc(dev, "AT91 integrated AT91_UDP controller");
148 at91_udp_attach(device_t dev)
150 struct at91_udp_softc *sc = device_get_softc(dev);
154 /* setup AT9100 USB device controller interface softc */
156 sc->sc_dci.sc_clocks_on = &at91_udp_clocks_on;
157 sc->sc_dci.sc_clocks_off = &at91_udp_clocks_off;
158 sc->sc_dci.sc_clocks_arg = sc;
159 sc->sc_dci.sc_pull_up = &at91_udp_pull_up;
160 sc->sc_dci.sc_pull_down = &at91_udp_pull_down;
161 sc->sc_dci.sc_pull_arg = sc;
163 /* initialise some bus fields */
164 sc->sc_dci.sc_bus.parent = dev;
165 sc->sc_dci.sc_bus.devices = sc->sc_dci.sc_devices;
166 sc->sc_dci.sc_bus.devices_max = AT91_MAX_DEVICES;
167 sc->sc_dci.sc_bus.dma_bits = 32;
169 /* get all DMA memory */
170 if (usb_bus_mem_alloc_all(&sc->sc_dci.sc_bus,
171 USB_GET_DMA_TAG(dev), NULL)) {
174 callout_init_mtx(&sc->sc_vbus, &sc->sc_dci.sc_bus.bus_mtx, 0);
177 * configure VBUS input pin, enable deglitch and enable
180 at91_pio_use_gpio(VBUS_BASE, VBUS_MASK);
181 at91_pio_gpio_input(VBUS_BASE, VBUS_MASK);
182 at91_pio_gpio_set_deglitch(VBUS_BASE, VBUS_MASK, 1);
183 at91_pio_gpio_set_interrupt(VBUS_BASE, VBUS_MASK, 0);
186 * configure PULLUP output pin :
188 at91_pio_use_gpio(PULLUP_BASE, PULLUP_MASK);
189 at91_pio_gpio_output(PULLUP_BASE, PULLUP_MASK, 0);
191 at91_udp_pull_down(sc);
193 /* wait 10ms for pulldown to stabilise */
194 usb_pause_mtx(NULL, hz / 100);
196 sc->sc_mclk = at91_pmc_clock_ref("mck");
197 sc->sc_iclk = at91_pmc_clock_ref("udc_clk");
198 sc->sc_fclk = at91_pmc_clock_ref("udpck");
201 sc->sc_dci.sc_io_res =
202 bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
204 if (!(sc->sc_dci.sc_io_res)) {
208 sc->sc_dci.sc_io_tag = rman_get_bustag(sc->sc_dci.sc_io_res);
209 sc->sc_dci.sc_io_hdl = rman_get_bushandle(sc->sc_dci.sc_io_res);
210 sc->sc_dci.sc_io_size = rman_get_size(sc->sc_dci.sc_io_res);
213 sc->sc_dci.sc_irq_res =
214 bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
215 if (!(sc->sc_dci.sc_irq_res)) {
218 sc->sc_dci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
219 if (!(sc->sc_dci.sc_bus.bdev)) {
222 device_set_ivars(sc->sc_dci.sc_bus.bdev, &sc->sc_dci.sc_bus);
224 err = bus_setup_intr(dev, sc->sc_dci.sc_irq_res, INTR_TYPE_TTY | INTR_MPSAFE,
225 at91dci_filter_interrupt, at91dci_interrupt, sc, &sc->sc_dci.sc_intr_hdl);
227 sc->sc_dci.sc_intr_hdl = NULL;
231 err = at91dci_init(&sc->sc_dci);
233 err = device_probe_and_attach(sc->sc_dci.sc_bus.bdev);
238 /* poll VBUS one time */
239 USB_BUS_LOCK(&sc->sc_dci.sc_bus);
241 USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
246 at91_udp_detach(dev);
251 at91_udp_detach(device_t dev)
253 struct at91_udp_softc *sc = device_get_softc(dev);
256 /* during module unload there are lots of children leftover */
257 device_delete_children(dev);
259 USB_BUS_LOCK(&sc->sc_dci.sc_bus);
260 callout_stop(&sc->sc_vbus);
261 USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
263 callout_drain(&sc->sc_vbus);
265 /* disable Transceiver */
266 AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_TXVC, AT91_UDP_TXVC_DIS);
268 /* disable and clear all interrupts */
269 AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_IDR, 0xFFFFFFFF);
270 AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_ICR, 0xFFFFFFFF);
272 if (sc->sc_dci.sc_irq_res && sc->sc_dci.sc_intr_hdl) {
274 * only call at91_udp_uninit() after at91_udp_init()
276 at91dci_uninit(&sc->sc_dci);
278 err = bus_teardown_intr(dev, sc->sc_dci.sc_irq_res,
279 sc->sc_dci.sc_intr_hdl);
280 sc->sc_dci.sc_intr_hdl = NULL;
282 if (sc->sc_dci.sc_irq_res) {
283 bus_release_resource(dev, SYS_RES_IRQ, 0,
284 sc->sc_dci.sc_irq_res);
285 sc->sc_dci.sc_irq_res = NULL;
287 if (sc->sc_dci.sc_io_res) {
288 bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID,
289 sc->sc_dci.sc_io_res);
290 sc->sc_dci.sc_io_res = NULL;
292 usb_bus_mem_free_all(&sc->sc_dci.sc_bus, NULL);
295 at91_pmc_clock_disable(sc->sc_iclk);
296 at91_pmc_clock_disable(sc->sc_fclk);
297 at91_pmc_clock_disable(sc->sc_mclk);
298 at91_pmc_clock_deref(sc->sc_fclk);
299 at91_pmc_clock_deref(sc->sc_iclk);
300 at91_pmc_clock_deref(sc->sc_mclk);
305 static device_method_t at91_udp_methods[] = {
306 /* Device interface */
307 DEVMETHOD(device_probe, at91_udp_probe),
308 DEVMETHOD(device_attach, at91_udp_attach),
309 DEVMETHOD(device_detach, at91_udp_detach),
310 DEVMETHOD(device_suspend, bus_generic_suspend),
311 DEVMETHOD(device_resume, bus_generic_resume),
312 DEVMETHOD(device_shutdown, bus_generic_shutdown),
317 static driver_t at91_udp_driver = {
319 .methods = at91_udp_methods,
320 .size = sizeof(struct at91_udp_softc),
323 static devclass_t at91_udp_devclass;
325 DRIVER_MODULE(at91_udp, simplebus, at91_udp_driver, at91_udp_devclass, 0, 0);