1/*-
2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
3 * Copyright (c) 2009, Luiz Otavio O Souza.
4 * Copyright (c) 2010, Andrew Thompson <thompsa@FreeBSD.org>
5 * 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 unmodified, this list of conditions, and the following
12 * disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30/*
31 * GPIO driver for Gateworks Avilia
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: stable/10/sys/arm/xscale/ixp425/avila_gpio.c 278782 2015-02-14 20:37:33Z loos $");
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/bus.h>
40
41#include <sys/kernel.h>
42#include <sys/module.h>
43#include <sys/rman.h>
44#include <sys/lock.h>
45#include <sys/mutex.h>
46#include <sys/gpio.h>
47
48#include <machine/bus.h>
49#include <machine/resource.h>
50#include <arm/xscale/ixp425/ixp425reg.h>
51#include <arm/xscale/ixp425/ixp425var.h>
52
53#include "gpio_if.h"
54
55#define GPIO_SET_BITS(sc, reg, bits) \
56 GPIO_CONF_WRITE_4(sc, reg, GPIO_CONF_READ_4(sc, (reg)) | (bits))
57
58#define GPIO_CLEAR_BITS(sc, reg, bits) \
59 GPIO_CONF_WRITE_4(sc, reg, GPIO_CONF_READ_4(sc, (reg)) & ~(bits))
60
61struct avila_gpio_softc {
62 device_t sc_dev;
63 bus_space_tag_t sc_iot;
64 bus_space_handle_t sc_gpio_ioh;
65 uint32_t sc_valid;
66 struct gpio_pin sc_pins[IXP4XX_GPIO_PINS];
67};
68
69struct avila_gpio_pin {
70 const char *name;
71 int pin;
72 int caps;
73};
74
75#define GPIO_PIN_IO (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)
76static struct avila_gpio_pin avila_gpio_pins[] = {
77 { "GPIO0", 0, GPIO_PIN_IO },
78 { "GPIO1", 1, GPIO_PIN_IO },
79 { "GPIO2", 2, GPIO_PIN_IO },
80 { "GPIO3", 3, GPIO_PIN_IO },
81 { "GPIO4", 4, GPIO_PIN_IO },
82 /*
83 * The following pins are connected to system devices and should not
84 * really be frobbed.
85 */
86#if 0
87 { "SER_ENA", 5, GPIO_PIN_IO },
88 { "I2C_SCL", 6, GPIO_PIN_IO },
89 { "I2C_SDA", 7, GPIO_PIN_IO },
90 { "PCI_INTD", 8, GPIO_PIN_IO },
91 { "PCI_INTC", 9, GPIO_PIN_IO },
92 { "PCI_INTB", 10, GPIO_PIN_IO },
93 { "PCI_INTA", 11, GPIO_PIN_IO },
94 { "ATA_INT", 12, GPIO_PIN_IO },
95 { "PCI_RST", 13, GPIO_PIN_IO },
96 { "PCI_CLK", 14, GPIO_PIN_OUTPUT },
97 { "EX_CLK", 15, GPIO_PIN_OUTPUT },
98#endif
99};
100#undef GPIO_PIN_IO
101
102/*
103 * Helpers
104 */
105static void avila_gpio_pin_configure(struct avila_gpio_softc *sc,
106 struct gpio_pin *pin, uint32_t flags);
107static int avila_gpio_pin_flags(struct avila_gpio_softc *sc, uint32_t pin);
108
109/*
110 * Driver stuff
111 */
112static int avila_gpio_probe(device_t dev);
113static int avila_gpio_attach(device_t dev);
114static int avila_gpio_detach(device_t dev);
115
116/*
117 * GPIO interface
118 */
119static int avila_gpio_pin_max(device_t dev, int *maxpin);
120static int avila_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps);
121static int avila_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t
122 *flags);
123static int avila_gpio_pin_getname(device_t dev, uint32_t pin, char *name);
124static int avila_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags);
125static int avila_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value);
126static int avila_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val);
127static int avila_gpio_pin_toggle(device_t dev, uint32_t pin);
128
129static int
130avila_gpio_pin_flags(struct avila_gpio_softc *sc, uint32_t pin)
131{
132 uint32_t v;
133
134 v = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR) & (1 << pin);
135
136 return (v ? GPIO_PIN_INPUT : GPIO_PIN_OUTPUT);
137}
138
139static void
140avila_gpio_pin_configure(struct avila_gpio_softc *sc, struct gpio_pin *pin,
141 unsigned int flags)
142{
143 uint32_t mask;
144
145 mask = 1 << pin->gp_pin;
146
147 /*
148 * Manage input/output
149 */
150 if (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) {
151 IXP4XX_GPIO_LOCK();
152 pin->gp_flags &= ~(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT);
153 if (flags & GPIO_PIN_OUTPUT) {
154 pin->gp_flags |= GPIO_PIN_OUTPUT;
155 GPIO_CLEAR_BITS(sc, IXP425_GPIO_GPOER, mask);
156 }
157 else {
158 pin->gp_flags |= GPIO_PIN_INPUT;
159 GPIO_SET_BITS(sc, IXP425_GPIO_GPOER, mask);
160 }
161 IXP4XX_GPIO_UNLOCK();
162 }
163}
164
165static int
166avila_gpio_pin_max(device_t dev, int *maxpin)
167{
168
169 *maxpin = IXP4XX_GPIO_PINS - 1;
170 return (0);
171}
172
173static int
174avila_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
175{
176 struct avila_gpio_softc *sc = device_get_softc(dev);
177
178 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
179 return (EINVAL);
180
181 *caps = sc->sc_pins[pin].gp_caps;
182 return (0);
183}
184
185static int
186avila_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
187{
188 struct avila_gpio_softc *sc = device_get_softc(dev);
189
190 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
191 return (EINVAL);
192
193 IXP4XX_GPIO_LOCK();
194 /* refresh since we do not own all the pins */
195 sc->sc_pins[pin].gp_flags = avila_gpio_pin_flags(sc, pin);
196 *flags = sc->sc_pins[pin].gp_flags;
197 IXP4XX_GPIO_UNLOCK();
198
199 return (0);
200}
201
202static int
203avila_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
204{
205 struct avila_gpio_softc *sc = device_get_softc(dev);
206
207 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
208 return (EINVAL);
209
210 memcpy(name, sc->sc_pins[pin].gp_name, GPIOMAXNAME);
211 return (0);
212}
213
214static int
215avila_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
216{
217 struct avila_gpio_softc *sc = device_get_softc(dev);
218 uint32_t mask = 1 << pin;
219
220 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & mask))
221 return (EINVAL);
222
223 /* Check for unwanted flags. */
224 if ((flags & sc->sc_pins[pin].gp_caps) != flags)
225 return (EINVAL);
226
227 /* Can't mix input/output together */
228 if ((flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) ==
229 (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT))
230 return (EINVAL);
231
232 avila_gpio_pin_configure(sc, &sc->sc_pins[pin], flags);
233 return (0);
234}
235
236static int
237avila_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
238{
239 struct avila_gpio_softc *sc = device_get_softc(dev);
240 uint32_t mask = 1 << pin;
241
242 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & mask))
243 return (EINVAL);
244
245 IXP4XX_GPIO_LOCK();
246 if (value)
247 GPIO_SET_BITS(sc, IXP425_GPIO_GPOUTR, mask);
248 else
249 GPIO_CLEAR_BITS(sc, IXP425_GPIO_GPOUTR, mask);
250 IXP4XX_GPIO_UNLOCK();
251
252 return (0);
253}
254
255static int
256avila_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
257{
258 struct avila_gpio_softc *sc = device_get_softc(dev);
259
260 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
261 return (EINVAL);
262
263 IXP4XX_GPIO_LOCK();
264 *val = (GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR) & (1 << pin)) ? 1 : 0;
265 IXP4XX_GPIO_UNLOCK();
266
267 return (0);
268}
269
270static int
271avila_gpio_pin_toggle(device_t dev, uint32_t pin)
272{
273 struct avila_gpio_softc *sc = device_get_softc(dev);
274 uint32_t mask = 1 << pin;
275 int res;
276
277 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & mask))
278 return (EINVAL);
279
280 IXP4XX_GPIO_LOCK();
281 res = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR) & mask;
282 if (res)
283 GPIO_CLEAR_BITS(sc, IXP425_GPIO_GPOUTR, mask);
284 else
285 GPIO_SET_BITS(sc, IXP425_GPIO_GPOUTR, mask);
286 IXP4XX_GPIO_UNLOCK();
287
288 return (0);
289}
290
291static int
292avila_gpio_probe(device_t dev)
293{
294
295 device_set_desc(dev, "Gateworks Avila GPIO driver");
296 return (0);
297}
298
299static int
300avila_gpio_attach(device_t dev)
301{
302#define N(a) (sizeof(a) / sizeof(a[0]))
303 struct avila_gpio_softc *sc = device_get_softc(dev);
304 struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
305 int i;
306
307 sc->sc_dev = dev;
308 sc->sc_iot = sa->sc_iot;
309 sc->sc_gpio_ioh = sa->sc_gpio_ioh;
310
311 for (i = 0; i < N(avila_gpio_pins); i++) {
312 struct avila_gpio_pin *p = &avila_gpio_pins[i];
313
314 strncpy(sc->sc_pins[p->pin].gp_name, p->name, GPIOMAXNAME);
315 sc->sc_pins[p->pin].gp_pin = p->pin;
316 sc->sc_pins[p->pin].gp_caps = p->caps;
317 sc->sc_pins[p->pin].gp_flags = avila_gpio_pin_flags(sc, p->pin);
318 sc->sc_valid |= 1 << p->pin;
319 }
320
321 device_add_child(dev, "gpioc", -1);
322 device_add_child(dev, "gpiobus", -1);
323
324 return (bus_generic_attach(dev));
325#undef N
326}
327
328static int
329avila_gpio_detach(device_t dev)
330{
331
332 bus_generic_detach(dev);
333
334 return(0);
335}
336
337static device_method_t gpio_avila_methods[] = {
338 DEVMETHOD(device_probe, avila_gpio_probe),
339 DEVMETHOD(device_attach, avila_gpio_attach),
340 DEVMETHOD(device_detach, avila_gpio_detach),
341
342 /* GPIO protocol */
343 DEVMETHOD(gpio_pin_max, avila_gpio_pin_max),
344 DEVMETHOD(gpio_pin_getname, avila_gpio_pin_getname),
345 DEVMETHOD(gpio_pin_getflags, avila_gpio_pin_getflags),
346 DEVMETHOD(gpio_pin_getcaps, avila_gpio_pin_getcaps),
347 DEVMETHOD(gpio_pin_setflags, avila_gpio_pin_setflags),
348 DEVMETHOD(gpio_pin_get, avila_gpio_pin_get),
349 DEVMETHOD(gpio_pin_set, avila_gpio_pin_set),
350 DEVMETHOD(gpio_pin_toggle, avila_gpio_pin_toggle),
351 {0, 0},
352};
353
354static driver_t gpio_avila_driver = {
355 "gpio_avila",
356 gpio_avila_methods,
357 sizeof(struct avila_gpio_softc),
358};
359static devclass_t gpio_avila_devclass;
360extern devclass_t gpiobus_devclass, gpioc_devclass;
361extern driver_t gpiobus_driver, gpioc_driver;
362
363DRIVER_MODULE(gpio_avila, ixp, gpio_avila_driver, gpio_avila_devclass, 0, 0);
364DRIVER_MODULE(gpiobus, gpio_avila, gpiobus_driver, gpiobus_devclass, 0, 0);
365DRIVER_MODULE(gpioc, gpio_avila, gpioc_driver, gpioc_devclass, 0, 0);
366MODULE_VERSION(gpio_avila, 1);
2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
3 * Copyright (c) 2009, Luiz Otavio O Souza.
4 * Copyright (c) 2010, Andrew Thompson <thompsa@FreeBSD.org>
5 * 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 unmodified, this list of conditions, and the following
12 * disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30/*
31 * GPIO driver for Gateworks Avilia
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: stable/10/sys/arm/xscale/ixp425/avila_gpio.c 278782 2015-02-14 20:37:33Z loos $");
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/bus.h>
40
41#include <sys/kernel.h>
42#include <sys/module.h>
43#include <sys/rman.h>
44#include <sys/lock.h>
45#include <sys/mutex.h>
46#include <sys/gpio.h>
47
48#include <machine/bus.h>
49#include <machine/resource.h>
50#include <arm/xscale/ixp425/ixp425reg.h>
51#include <arm/xscale/ixp425/ixp425var.h>
52
53#include "gpio_if.h"
54
55#define GPIO_SET_BITS(sc, reg, bits) \
56 GPIO_CONF_WRITE_4(sc, reg, GPIO_CONF_READ_4(sc, (reg)) | (bits))
57
58#define GPIO_CLEAR_BITS(sc, reg, bits) \
59 GPIO_CONF_WRITE_4(sc, reg, GPIO_CONF_READ_4(sc, (reg)) & ~(bits))
60
61struct avila_gpio_softc {
62 device_t sc_dev;
63 bus_space_tag_t sc_iot;
64 bus_space_handle_t sc_gpio_ioh;
65 uint32_t sc_valid;
66 struct gpio_pin sc_pins[IXP4XX_GPIO_PINS];
67};
68
69struct avila_gpio_pin {
70 const char *name;
71 int pin;
72 int caps;
73};
74
75#define GPIO_PIN_IO (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)
76static struct avila_gpio_pin avila_gpio_pins[] = {
77 { "GPIO0", 0, GPIO_PIN_IO },
78 { "GPIO1", 1, GPIO_PIN_IO },
79 { "GPIO2", 2, GPIO_PIN_IO },
80 { "GPIO3", 3, GPIO_PIN_IO },
81 { "GPIO4", 4, GPIO_PIN_IO },
82 /*
83 * The following pins are connected to system devices and should not
84 * really be frobbed.
85 */
86#if 0
87 { "SER_ENA", 5, GPIO_PIN_IO },
88 { "I2C_SCL", 6, GPIO_PIN_IO },
89 { "I2C_SDA", 7, GPIO_PIN_IO },
90 { "PCI_INTD", 8, GPIO_PIN_IO },
91 { "PCI_INTC", 9, GPIO_PIN_IO },
92 { "PCI_INTB", 10, GPIO_PIN_IO },
93 { "PCI_INTA", 11, GPIO_PIN_IO },
94 { "ATA_INT", 12, GPIO_PIN_IO },
95 { "PCI_RST", 13, GPIO_PIN_IO },
96 { "PCI_CLK", 14, GPIO_PIN_OUTPUT },
97 { "EX_CLK", 15, GPIO_PIN_OUTPUT },
98#endif
99};
100#undef GPIO_PIN_IO
101
102/*
103 * Helpers
104 */
105static void avila_gpio_pin_configure(struct avila_gpio_softc *sc,
106 struct gpio_pin *pin, uint32_t flags);
107static int avila_gpio_pin_flags(struct avila_gpio_softc *sc, uint32_t pin);
108
109/*
110 * Driver stuff
111 */
112static int avila_gpio_probe(device_t dev);
113static int avila_gpio_attach(device_t dev);
114static int avila_gpio_detach(device_t dev);
115
116/*
117 * GPIO interface
118 */
119static int avila_gpio_pin_max(device_t dev, int *maxpin);
120static int avila_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps);
121static int avila_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t
122 *flags);
123static int avila_gpio_pin_getname(device_t dev, uint32_t pin, char *name);
124static int avila_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags);
125static int avila_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value);
126static int avila_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val);
127static int avila_gpio_pin_toggle(device_t dev, uint32_t pin);
128
129static int
130avila_gpio_pin_flags(struct avila_gpio_softc *sc, uint32_t pin)
131{
132 uint32_t v;
133
134 v = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR) & (1 << pin);
135
136 return (v ? GPIO_PIN_INPUT : GPIO_PIN_OUTPUT);
137}
138
139static void
140avila_gpio_pin_configure(struct avila_gpio_softc *sc, struct gpio_pin *pin,
141 unsigned int flags)
142{
143 uint32_t mask;
144
145 mask = 1 << pin->gp_pin;
146
147 /*
148 * Manage input/output
149 */
150 if (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) {
151 IXP4XX_GPIO_LOCK();
152 pin->gp_flags &= ~(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT);
153 if (flags & GPIO_PIN_OUTPUT) {
154 pin->gp_flags |= GPIO_PIN_OUTPUT;
155 GPIO_CLEAR_BITS(sc, IXP425_GPIO_GPOER, mask);
156 }
157 else {
158 pin->gp_flags |= GPIO_PIN_INPUT;
159 GPIO_SET_BITS(sc, IXP425_GPIO_GPOER, mask);
160 }
161 IXP4XX_GPIO_UNLOCK();
162 }
163}
164
165static int
166avila_gpio_pin_max(device_t dev, int *maxpin)
167{
168
169 *maxpin = IXP4XX_GPIO_PINS - 1;
170 return (0);
171}
172
173static int
174avila_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
175{
176 struct avila_gpio_softc *sc = device_get_softc(dev);
177
178 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
179 return (EINVAL);
180
181 *caps = sc->sc_pins[pin].gp_caps;
182 return (0);
183}
184
185static int
186avila_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
187{
188 struct avila_gpio_softc *sc = device_get_softc(dev);
189
190 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
191 return (EINVAL);
192
193 IXP4XX_GPIO_LOCK();
194 /* refresh since we do not own all the pins */
195 sc->sc_pins[pin].gp_flags = avila_gpio_pin_flags(sc, pin);
196 *flags = sc->sc_pins[pin].gp_flags;
197 IXP4XX_GPIO_UNLOCK();
198
199 return (0);
200}
201
202static int
203avila_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
204{
205 struct avila_gpio_softc *sc = device_get_softc(dev);
206
207 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
208 return (EINVAL);
209
210 memcpy(name, sc->sc_pins[pin].gp_name, GPIOMAXNAME);
211 return (0);
212}
213
214static int
215avila_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
216{
217 struct avila_gpio_softc *sc = device_get_softc(dev);
218 uint32_t mask = 1 << pin;
219
220 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & mask))
221 return (EINVAL);
222
223 /* Check for unwanted flags. */
224 if ((flags & sc->sc_pins[pin].gp_caps) != flags)
225 return (EINVAL);
226
227 /* Can't mix input/output together */
228 if ((flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) ==
229 (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT))
230 return (EINVAL);
231
232 avila_gpio_pin_configure(sc, &sc->sc_pins[pin], flags);
233 return (0);
234}
235
236static int
237avila_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
238{
239 struct avila_gpio_softc *sc = device_get_softc(dev);
240 uint32_t mask = 1 << pin;
241
242 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & mask))
243 return (EINVAL);
244
245 IXP4XX_GPIO_LOCK();
246 if (value)
247 GPIO_SET_BITS(sc, IXP425_GPIO_GPOUTR, mask);
248 else
249 GPIO_CLEAR_BITS(sc, IXP425_GPIO_GPOUTR, mask);
250 IXP4XX_GPIO_UNLOCK();
251
252 return (0);
253}
254
255static int
256avila_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
257{
258 struct avila_gpio_softc *sc = device_get_softc(dev);
259
260 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & (1 << pin)))
261 return (EINVAL);
262
263 IXP4XX_GPIO_LOCK();
264 *val = (GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR) & (1 << pin)) ? 1 : 0;
265 IXP4XX_GPIO_UNLOCK();
266
267 return (0);
268}
269
270static int
271avila_gpio_pin_toggle(device_t dev, uint32_t pin)
272{
273 struct avila_gpio_softc *sc = device_get_softc(dev);
274 uint32_t mask = 1 << pin;
275 int res;
276
277 if (pin >= IXP4XX_GPIO_PINS || !(sc->sc_valid & mask))
278 return (EINVAL);
279
280 IXP4XX_GPIO_LOCK();
281 res = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPINR) & mask;
282 if (res)
283 GPIO_CLEAR_BITS(sc, IXP425_GPIO_GPOUTR, mask);
284 else
285 GPIO_SET_BITS(sc, IXP425_GPIO_GPOUTR, mask);
286 IXP4XX_GPIO_UNLOCK();
287
288 return (0);
289}
290
291static int
292avila_gpio_probe(device_t dev)
293{
294
295 device_set_desc(dev, "Gateworks Avila GPIO driver");
296 return (0);
297}
298
299static int
300avila_gpio_attach(device_t dev)
301{
302#define N(a) (sizeof(a) / sizeof(a[0]))
303 struct avila_gpio_softc *sc = device_get_softc(dev);
304 struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
305 int i;
306
307 sc->sc_dev = dev;
308 sc->sc_iot = sa->sc_iot;
309 sc->sc_gpio_ioh = sa->sc_gpio_ioh;
310
311 for (i = 0; i < N(avila_gpio_pins); i++) {
312 struct avila_gpio_pin *p = &avila_gpio_pins[i];
313
314 strncpy(sc->sc_pins[p->pin].gp_name, p->name, GPIOMAXNAME);
315 sc->sc_pins[p->pin].gp_pin = p->pin;
316 sc->sc_pins[p->pin].gp_caps = p->caps;
317 sc->sc_pins[p->pin].gp_flags = avila_gpio_pin_flags(sc, p->pin);
318 sc->sc_valid |= 1 << p->pin;
319 }
320
321 device_add_child(dev, "gpioc", -1);
322 device_add_child(dev, "gpiobus", -1);
323
324 return (bus_generic_attach(dev));
325#undef N
326}
327
328static int
329avila_gpio_detach(device_t dev)
330{
331
332 bus_generic_detach(dev);
333
334 return(0);
335}
336
337static device_method_t gpio_avila_methods[] = {
338 DEVMETHOD(device_probe, avila_gpio_probe),
339 DEVMETHOD(device_attach, avila_gpio_attach),
340 DEVMETHOD(device_detach, avila_gpio_detach),
341
342 /* GPIO protocol */
343 DEVMETHOD(gpio_pin_max, avila_gpio_pin_max),
344 DEVMETHOD(gpio_pin_getname, avila_gpio_pin_getname),
345 DEVMETHOD(gpio_pin_getflags, avila_gpio_pin_getflags),
346 DEVMETHOD(gpio_pin_getcaps, avila_gpio_pin_getcaps),
347 DEVMETHOD(gpio_pin_setflags, avila_gpio_pin_setflags),
348 DEVMETHOD(gpio_pin_get, avila_gpio_pin_get),
349 DEVMETHOD(gpio_pin_set, avila_gpio_pin_set),
350 DEVMETHOD(gpio_pin_toggle, avila_gpio_pin_toggle),
351 {0, 0},
352};
353
354static driver_t gpio_avila_driver = {
355 "gpio_avila",
356 gpio_avila_methods,
357 sizeof(struct avila_gpio_softc),
358};
359static devclass_t gpio_avila_devclass;
360extern devclass_t gpiobus_devclass, gpioc_devclass;
361extern driver_t gpiobus_driver, gpioc_driver;
362
363DRIVER_MODULE(gpio_avila, ixp, gpio_avila_driver, gpio_avila_devclass, 0, 0);
364DRIVER_MODULE(gpiobus, gpio_avila, gpiobus_driver, gpiobus_devclass, 0, 0);
365DRIVER_MODULE(gpioc, gpio_avila, gpioc_driver, gpioc_devclass, 0, 0);
366MODULE_VERSION(gpio_avila, 1);