1 #include <sys/cdefs.h>
2 __FBSDID("$FreeBSD$");
3
4 /*-
5 * Copyright (c) 2007-2008 Hans Petter Selasky. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR 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/stdint.h>
30 #include <sys/stddef.h>
31 #include <sys/param.h>
32 #include <sys/queue.h>
33 #include <sys/types.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/bus.h>
37 #include <sys/module.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40 #include <sys/condvar.h>
41 #include <sys/sysctl.h>
42 #include <sys/sx.h>
43 #include <sys/unistd.h>
44 #include <sys/callout.h>
45 #include <sys/malloc.h>
46 #include <sys/priv.h>
47
48 #include <dev/usb/usb.h>
49 #include <dev/usb/usbdi.h>
50
51 #include <dev/usb/usb_core.h>
52 #include <dev/usb/usb_busdma.h>
53 #include <dev/usb/usb_process.h>
54 #include <dev/usb/usb_util.h>
55
56 #include <dev/usb/usb_controller.h>
57 #include <dev/usb/usb_bus.h>
58 #include <dev/usb/controller/at91dci.h>
59
60 #include <sys/rman.h>
61
62 #include <arm/at91/at91_pmcvar.h>
63 #include <arm/at91/at91rm92reg.h>
64 #include <arm/at91/at91_pioreg.h>
65 #include <arm/at91/at91_piovar.h>
66
67 #include <dev/fdt/fdt_common.h>
68 #include <dev/ofw/ofw_bus.h>
69 #include <dev/ofw/ofw_bus_subr.h>
70
71 #define MEM_RID 0
72
73 /* Pin Definitions - do they belong here or somewhere else ? -- YES! */
74
75 #define VBUS_MASK AT91C_PIO_PB24
76 #define VBUS_BASE AT91RM92_PIOB_BASE
77
78 #define PULLUP_MASK AT91C_PIO_PB22
79 #define PULLUP_BASE AT91RM92_PIOB_BASE
80
81 static device_probe_t at91_udp_probe;
82 static device_attach_t at91_udp_attach;
83 static device_detach_t at91_udp_detach;
84
85 struct at91_udp_softc {
86 struct at91dci_softc sc_dci; /* must be first */
87 struct at91_pmc_clock *sc_mclk;
88 struct at91_pmc_clock *sc_iclk;
89 struct at91_pmc_clock *sc_fclk;
90 struct callout sc_vbus;
91 };
92
93 static void
at91_vbus_poll(struct at91_udp_softc * sc)94 at91_vbus_poll(struct at91_udp_softc *sc)
95 {
96 uint8_t vbus_val;
97
98 vbus_val = at91_pio_gpio_get(VBUS_BASE, VBUS_MASK) != 0;
99 at91dci_vbus_interrupt(&sc->sc_dci, vbus_val);
100
101 callout_reset(&sc->sc_vbus, hz, (void *)&at91_vbus_poll, sc);
102 }
103
104 static void
at91_udp_clocks_on(void * arg)105 at91_udp_clocks_on(void *arg)
106 {
107 struct at91_udp_softc *sc = arg;
108
109 at91_pmc_clock_enable(sc->sc_mclk);
110 at91_pmc_clock_enable(sc->sc_iclk);
111 at91_pmc_clock_enable(sc->sc_fclk);
112 }
113
114 static void
at91_udp_clocks_off(void * arg)115 at91_udp_clocks_off(void *arg)
116 {
117 struct at91_udp_softc *sc = arg;
118
119 at91_pmc_clock_disable(sc->sc_fclk);
120 at91_pmc_clock_disable(sc->sc_iclk);
121 at91_pmc_clock_disable(sc->sc_mclk);
122 }
123
124 static void
at91_udp_pull_up(void * arg)125 at91_udp_pull_up(void *arg)
126 {
127 at91_pio_gpio_set(PULLUP_BASE, PULLUP_MASK);
128 }
129
130 static void
at91_udp_pull_down(void * arg)131 at91_udp_pull_down(void *arg)
132 {
133 at91_pio_gpio_clear(PULLUP_BASE, PULLUP_MASK);
134 }
135
136 static int
at91_udp_probe(device_t dev)137 at91_udp_probe(device_t dev)
138 {
139 if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-udc"))
140 return (ENXIO);
141 device_set_desc(dev, "AT91 integrated AT91_UDP controller");
142 return (0);
143 }
144
145 static int
at91_udp_attach(device_t dev)146 at91_udp_attach(device_t dev)
147 {
148 struct at91_udp_softc *sc = device_get_softc(dev);
149 int err;
150 int rid;
151
152 /* setup AT9100 USB device controller interface softc */
153
154 sc->sc_dci.sc_clocks_on = &at91_udp_clocks_on;
155 sc->sc_dci.sc_clocks_off = &at91_udp_clocks_off;
156 sc->sc_dci.sc_clocks_arg = sc;
157 sc->sc_dci.sc_pull_up = &at91_udp_pull_up;
158 sc->sc_dci.sc_pull_down = &at91_udp_pull_down;
159 sc->sc_dci.sc_pull_arg = sc;
160
161 /* initialise some bus fields */
162 sc->sc_dci.sc_bus.parent = dev;
163 sc->sc_dci.sc_bus.devices = sc->sc_dci.sc_devices;
164 sc->sc_dci.sc_bus.devices_max = AT91_MAX_DEVICES;
165 sc->sc_dci.sc_bus.dma_bits = 32;
166
167 /* get all DMA memory */
168 if (usb_bus_mem_alloc_all(&sc->sc_dci.sc_bus,
169 USB_GET_DMA_TAG(dev), NULL)) {
170 return (ENOMEM);
171 }
172 callout_init_mtx(&sc->sc_vbus, &sc->sc_dci.sc_bus.bus_mtx, 0);
173
174 /*
175 * configure VBUS input pin, enable deglitch and enable
176 * interrupt :
177 */
178 at91_pio_use_gpio(VBUS_BASE, VBUS_MASK);
179 at91_pio_gpio_input(VBUS_BASE, VBUS_MASK);
180 at91_pio_gpio_set_deglitch(VBUS_BASE, VBUS_MASK, 1);
181 at91_pio_gpio_set_interrupt(VBUS_BASE, VBUS_MASK, 0);
182
183 /*
184 * configure PULLUP output pin :
185 */
186 at91_pio_use_gpio(PULLUP_BASE, PULLUP_MASK);
187 at91_pio_gpio_output(PULLUP_BASE, PULLUP_MASK, 0);
188
189 at91_udp_pull_down(sc);
190
191 /* wait 10ms for pulldown to stabilise */
192 usb_pause_mtx(NULL, hz / 100);
193
194 sc->sc_mclk = at91_pmc_clock_ref("mck");
195 sc->sc_iclk = at91_pmc_clock_ref("udc_clk");
196 sc->sc_fclk = at91_pmc_clock_ref("udpck");
197
198 rid = MEM_RID;
199 sc->sc_dci.sc_io_res =
200 bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
201
202 if (!(sc->sc_dci.sc_io_res)) {
203 err = ENOMEM;
204 goto error;
205 }
206 sc->sc_dci.sc_io_tag = rman_get_bustag(sc->sc_dci.sc_io_res);
207 sc->sc_dci.sc_io_hdl = rman_get_bushandle(sc->sc_dci.sc_io_res);
208 sc->sc_dci.sc_io_size = rman_get_size(sc->sc_dci.sc_io_res);
209
210 rid = 0;
211 sc->sc_dci.sc_irq_res =
212 bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
213 if (!(sc->sc_dci.sc_irq_res)) {
214 goto error;
215 }
216 sc->sc_dci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
217 if (!(sc->sc_dci.sc_bus.bdev)) {
218 goto error;
219 }
220 device_set_ivars(sc->sc_dci.sc_bus.bdev, &sc->sc_dci.sc_bus);
221
222 err = bus_setup_intr(dev, sc->sc_dci.sc_irq_res, INTR_TYPE_TTY | INTR_MPSAFE,
223 at91dci_filter_interrupt, at91dci_interrupt, sc, &sc->sc_dci.sc_intr_hdl);
224 if (err) {
225 sc->sc_dci.sc_intr_hdl = NULL;
226 goto error;
227 }
228
229 err = at91dci_init(&sc->sc_dci);
230 if (!err) {
231 err = device_probe_and_attach(sc->sc_dci.sc_bus.bdev);
232 }
233 if (err) {
234 goto error;
235 } else {
236 /* poll VBUS one time */
237 USB_BUS_LOCK(&sc->sc_dci.sc_bus);
238 at91_vbus_poll(sc);
239 USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
240 }
241 return (0);
242
243 error:
244 at91_udp_detach(dev);
245 return (ENXIO);
246 }
247
248 static int
at91_udp_detach(device_t dev)249 at91_udp_detach(device_t dev)
250 {
251 struct at91_udp_softc *sc = device_get_softc(dev);
252 device_t bdev;
253 int err;
254
255 if (sc->sc_dci.sc_bus.bdev) {
256 bdev = sc->sc_dci.sc_bus.bdev;
257 device_detach(bdev);
258 device_delete_child(dev, bdev);
259 }
260 /* during module unload there are lots of children leftover */
261 device_delete_children(dev);
262
263 USB_BUS_LOCK(&sc->sc_dci.sc_bus);
264 callout_stop(&sc->sc_vbus);
265 USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
266
267 callout_drain(&sc->sc_vbus);
268
269 /* disable Transceiver */
270 AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_TXVC, AT91_UDP_TXVC_DIS);
271
272 /* disable and clear all interrupts */
273 AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_IDR, 0xFFFFFFFF);
274 AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_ICR, 0xFFFFFFFF);
275
276 if (sc->sc_dci.sc_irq_res && sc->sc_dci.sc_intr_hdl) {
277 /*
278 * only call at91_udp_uninit() after at91_udp_init()
279 */
280 at91dci_uninit(&sc->sc_dci);
281
282 err = bus_teardown_intr(dev, sc->sc_dci.sc_irq_res,
283 sc->sc_dci.sc_intr_hdl);
284 sc->sc_dci.sc_intr_hdl = NULL;
285 }
286 if (sc->sc_dci.sc_irq_res) {
287 bus_release_resource(dev, SYS_RES_IRQ, 0,
288 sc->sc_dci.sc_irq_res);
289 sc->sc_dci.sc_irq_res = NULL;
290 }
291 if (sc->sc_dci.sc_io_res) {
292 bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID,
293 sc->sc_dci.sc_io_res);
294 sc->sc_dci.sc_io_res = NULL;
295 }
296 usb_bus_mem_free_all(&sc->sc_dci.sc_bus, NULL);
297
298 /* disable clocks */
299 at91_pmc_clock_disable(sc->sc_iclk);
300 at91_pmc_clock_disable(sc->sc_fclk);
301 at91_pmc_clock_disable(sc->sc_mclk);
302 at91_pmc_clock_deref(sc->sc_fclk);
303 at91_pmc_clock_deref(sc->sc_iclk);
304 at91_pmc_clock_deref(sc->sc_mclk);
305
306 return (0);
307 }
308
309 static device_method_t at91_udp_methods[] = {
310 /* Device interface */
311 DEVMETHOD(device_probe, at91_udp_probe),
312 DEVMETHOD(device_attach, at91_udp_attach),
313 DEVMETHOD(device_detach, at91_udp_detach),
314 DEVMETHOD(device_suspend, bus_generic_suspend),
315 DEVMETHOD(device_resume, bus_generic_resume),
316 DEVMETHOD(device_shutdown, bus_generic_shutdown),
317
318 DEVMETHOD_END
319 };
320
321 static driver_t at91_udp_driver = {
322 .name = "at91_udp",
323 .methods = at91_udp_methods,
324 .size = sizeof(struct at91_udp_softc),
325 };
326
327 static devclass_t at91_udp_devclass;
328
329 DRIVER_MODULE(at91_udp, simplebus, at91_udp_driver, at91_udp_devclass, 0, 0);
330