2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 2008 by Nathan Whitehorn. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Driver for MacIO GPIO controller
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
45 #include <machine/bus.h>
46 #include <machine/intr_machdep.h>
47 #include <machine/resource.h>
48 #include <machine/vmparam.h>
50 #include <dev/ofw/ofw_bus.h>
51 #include <dev/ofw/ofw_bus_subr.h>
52 #include <dev/ofw/openfirm.h>
54 #include <powerpc/powermac/macgpiovar.h>
59 struct macgpio_softc {
61 struct resource *sc_gpios;
63 uint32_t sc_saved_gpio_levels[2];
64 uint32_t sc_saved_gpios[GPIO_COUNT];
65 uint32_t sc_saved_extint_gpios[GPIO_EXTINT_COUNT];
68 static MALLOC_DEFINE(M_MACGPIO, "macgpio", "macgpio device information");
70 static int macgpio_probe(device_t);
71 static int macgpio_attach(device_t);
72 static int macgpio_print_child(device_t dev, device_t child);
73 static void macgpio_probe_nomatch(device_t, device_t);
74 static struct resource *macgpio_alloc_resource(device_t, device_t, int, int *,
75 rman_res_t, rman_res_t, rman_res_t, u_int);
76 static int macgpio_activate_resource(device_t, device_t, int, int,
78 static int macgpio_deactivate_resource(device_t, device_t, int, int,
80 static ofw_bus_get_devinfo_t macgpio_get_devinfo;
81 static int macgpio_suspend(device_t dev);
82 static int macgpio_resume(device_t dev);
85 * Bus interface definition
87 static device_method_t macgpio_methods[] = {
88 /* Device interface */
89 DEVMETHOD(device_probe, macgpio_probe),
90 DEVMETHOD(device_attach, macgpio_attach),
91 DEVMETHOD(device_detach, bus_generic_detach),
92 DEVMETHOD(device_shutdown, bus_generic_shutdown),
93 DEVMETHOD(device_suspend, macgpio_suspend),
94 DEVMETHOD(device_resume, macgpio_resume),
97 DEVMETHOD(bus_print_child, macgpio_print_child),
98 DEVMETHOD(bus_probe_nomatch, macgpio_probe_nomatch),
99 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
100 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
102 DEVMETHOD(bus_alloc_resource, macgpio_alloc_resource),
103 DEVMETHOD(bus_activate_resource, macgpio_activate_resource),
104 DEVMETHOD(bus_deactivate_resource, macgpio_deactivate_resource),
105 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
107 DEVMETHOD(bus_child_pnpinfo, ofw_bus_gen_child_pnpinfo),
109 /* ofw_bus interface */
110 DEVMETHOD(ofw_bus_get_devinfo, macgpio_get_devinfo),
111 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
112 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
113 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
114 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
115 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
119 static driver_t macgpio_pci_driver = {
122 sizeof(struct macgpio_softc)
125 EARLY_DRIVER_MODULE(macgpio, macio, macgpio_pci_driver, 0, 0, BUS_PASS_BUS);
127 struct macgpio_devinfo {
128 struct ofw_bus_devinfo mdi_obdinfo;
129 struct resource_list mdi_resources;
135 macgpio_probe(device_t dev)
139 name = ofw_bus_get_name(dev);
140 if (name && strcmp(name, "gpio") == 0) {
141 device_set_desc(dev, "MacIO GPIO Controller");
149 * Scan Open Firmware child nodes, and attach these as children
153 macgpio_attach(device_t dev)
155 struct macgpio_softc *sc;
156 struct macgpio_devinfo *dinfo;
157 phandle_t root, child, iparent;
161 sc = device_get_softc(dev);
162 root = sc->sc_node = ofw_bus_get_node(dev);
164 sc->sc_gpios = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
165 &sc->sc_gpios_rid, RF_ACTIVE);
168 * Iterate through the sub-devices
170 for (child = OF_child(root); child != 0; child = OF_peer(child)) {
171 dinfo = malloc(sizeof(*dinfo), M_MACGPIO, M_WAITOK | M_ZERO);
172 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo, child) !=
174 free(dinfo, M_MACGPIO);
178 if (OF_getencprop(child, "reg", &dinfo->gpio_num,
179 sizeof(dinfo->gpio_num)) != sizeof(dinfo->gpio_num)) {
181 * Some early GPIO controllers don't provide GPIO
182 * numbers for GPIOs designed only to provide
183 * interrupt resources. We should still allow these
184 * to attach, but with caution.
187 dinfo->gpio_num = -1;
190 resource_list_init(&dinfo->mdi_resources);
192 if (OF_getencprop(child, "interrupts", irq, sizeof(irq)) ==
194 OF_searchencprop(child, "interrupt-parent", &iparent,
196 resource_list_add(&dinfo->mdi_resources, SYS_RES_IRQ,
197 0, MAP_IRQ(iparent, irq[0]),
198 MAP_IRQ(iparent, irq[0]), 1);
201 /* Fix messed-up offsets */
202 if (dinfo->gpio_num > 0x50)
203 dinfo->gpio_num -= 0x50;
205 cdev = device_add_child(dev, NULL, -1);
207 device_printf(dev, "<%s>: device_add_child failed\n",
208 dinfo->mdi_obdinfo.obd_name);
209 ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
210 free(dinfo, M_MACGPIO);
213 device_set_ivars(cdev, dinfo);
216 return (bus_generic_attach(dev));
220 macgpio_print_child(device_t dev, device_t child)
222 struct macgpio_devinfo *dinfo;
225 dinfo = device_get_ivars(child);
227 retval += bus_print_child_header(dev, child);
229 if (dinfo->gpio_num >= GPIO_BASE)
230 printf(" gpio %d", dinfo->gpio_num - GPIO_BASE);
231 else if (dinfo->gpio_num >= GPIO_EXTINT_BASE)
232 printf(" extint-gpio %d", dinfo->gpio_num - GPIO_EXTINT_BASE);
233 else if (dinfo->gpio_num >= 0)
234 printf(" addr 0x%02x", dinfo->gpio_num); /* should not happen */
236 resource_list_print_type(&dinfo->mdi_resources, "irq", SYS_RES_IRQ,
238 retval += bus_print_child_footer(dev, child);
244 macgpio_probe_nomatch(device_t dev, device_t child)
246 struct macgpio_devinfo *dinfo;
250 dinfo = device_get_ivars(child);
252 if ((type = ofw_bus_get_type(child)) == NULL)
254 device_printf(dev, "<%s, %s>", type, ofw_bus_get_name(child));
255 if (dinfo->gpio_num >= 0)
256 printf(" gpio %d",dinfo->gpio_num);
257 resource_list_print_type(&dinfo->mdi_resources, "irq",
259 printf(" (no driver attached)\n");
263 static struct resource *
264 macgpio_alloc_resource(device_t bus, device_t child, int type, int *rid,
265 rman_res_t start, rman_res_t end, rman_res_t count,
268 struct macgpio_devinfo *dinfo;
270 dinfo = device_get_ivars(child);
272 if (type != SYS_RES_IRQ)
275 return (resource_list_alloc(&dinfo->mdi_resources, bus, child, type,
276 rid, start, end, count, flags));
280 macgpio_activate_resource(device_t bus, device_t child, int type, int rid,
281 struct resource *res)
283 struct macgpio_softc *sc;
284 struct macgpio_devinfo *dinfo;
287 sc = device_get_softc(bus);
288 dinfo = device_get_ivars(child);
290 if (type != SYS_RES_IRQ)
293 if (dinfo->gpio_num >= 0) {
294 val = bus_read_1(sc->sc_gpios,dinfo->gpio_num);
296 bus_write_1(sc->sc_gpios,dinfo->gpio_num,val);
299 return (bus_activate_resource(bus, type, rid, res));
303 macgpio_deactivate_resource(device_t bus, device_t child, int type, int rid,
304 struct resource *res)
306 struct macgpio_softc *sc;
307 struct macgpio_devinfo *dinfo;
310 sc = device_get_softc(bus);
311 dinfo = device_get_ivars(child);
313 if (type != SYS_RES_IRQ)
316 if (dinfo->gpio_num >= 0) {
317 val = bus_read_1(sc->sc_gpios,dinfo->gpio_num);
319 bus_write_1(sc->sc_gpios,dinfo->gpio_num,val);
322 return (bus_deactivate_resource(bus, type, rid, res));
326 macgpio_read(device_t dev)
328 struct macgpio_softc *sc;
329 struct macgpio_devinfo *dinfo;
331 sc = device_get_softc(device_get_parent(dev));
332 dinfo = device_get_ivars(dev);
334 if (dinfo->gpio_num < 0)
337 return (bus_read_1(sc->sc_gpios,dinfo->gpio_num));
341 macgpio_write(device_t dev, uint8_t val)
343 struct macgpio_softc *sc;
344 struct macgpio_devinfo *dinfo;
346 sc = device_get_softc(device_get_parent(dev));
347 dinfo = device_get_ivars(dev);
349 if (dinfo->gpio_num < 0)
352 bus_write_1(sc->sc_gpios,dinfo->gpio_num,val);
355 static const struct ofw_bus_devinfo *
356 macgpio_get_devinfo(device_t dev, device_t child)
358 struct macgpio_devinfo *dinfo;
360 dinfo = device_get_ivars(child);
361 return (&dinfo->mdi_obdinfo);
365 macgpio_suspend(device_t dev)
367 struct macgpio_softc *sc;
370 sc = device_get_softc(dev);
371 sc->sc_saved_gpio_levels[0] = bus_read_4(sc->sc_gpios, GPIO_LEVELS_0);
372 sc->sc_saved_gpio_levels[1] = bus_read_4(sc->sc_gpios, GPIO_LEVELS_1);
374 for (i = 0; i < GPIO_COUNT; i++)
375 sc->sc_saved_gpios[i] = bus_read_1(sc->sc_gpios, GPIO_BASE + i);
376 for (i = 0; i < GPIO_EXTINT_COUNT; i++)
377 sc->sc_saved_extint_gpios[i] = bus_read_1(sc->sc_gpios, GPIO_EXTINT_BASE + i);
383 macgpio_resume(device_t dev)
385 struct macgpio_softc *sc;
388 sc = device_get_softc(dev);
389 bus_write_4(sc->sc_gpios, GPIO_LEVELS_0, sc->sc_saved_gpio_levels[0]);
390 bus_write_4(sc->sc_gpios, GPIO_LEVELS_1, sc->sc_saved_gpio_levels[1]);
392 for (i = 0; i < GPIO_COUNT; i++)
393 bus_write_1(sc->sc_gpios, GPIO_BASE + i, sc->sc_saved_gpios[i]);
394 for (i = 0; i < GPIO_EXTINT_COUNT; i++)
395 bus_write_1(sc->sc_gpios, GPIO_EXTINT_BASE + i, sc->sc_saved_extint_gpios[i]);