2 * Copyright 2011 Red Hat Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
25 #include <subdev/gpio.h>
26 #include <subdev/bios.h>
27 #include <subdev/bios/gpio.h>
30 nouveau_gpio_drive(struct nouveau_gpio *gpio,
31 int idx, int line, int dir, int out)
33 return gpio->drive ? gpio->drive(gpio, line, dir, out) : -ENODEV;
37 nouveau_gpio_sense(struct nouveau_gpio *gpio, int idx, int line)
39 return gpio->sense ? gpio->sense(gpio, line) : -ENODEV;
43 nouveau_gpio_find(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line,
44 struct dcb_gpio_func *func)
46 struct nouveau_bios *bios = nouveau_bios(gpio);
50 if (line == 0xff && tag == 0xff)
53 data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func);
57 /* Apple iMac G4 NV18 */
58 if (nv_device_match(nv_object(gpio), 0x0189, 0x10de, 0x0010)) {
59 if (tag == DCB_GPIO_TVDAC0) {
60 *func = (struct dcb_gpio_func) {
61 .func = DCB_GPIO_TVDAC0,
74 nouveau_gpio_set(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line, int state)
76 struct dcb_gpio_func func;
79 ret = nouveau_gpio_find(gpio, idx, tag, line, &func);
81 int dir = !!(func.log[state] & 0x02);
82 int out = !!(func.log[state] & 0x01);
83 ret = nouveau_gpio_drive(gpio, idx, func.line, dir, out);
90 nouveau_gpio_get(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line)
92 struct dcb_gpio_func func;
95 ret = nouveau_gpio_find(gpio, idx, tag, line, &func);
97 ret = nouveau_gpio_sense(gpio, idx, func.line);
99 ret = (ret == (func.log[1] & 1));
106 _nouveau_gpio_dtor(struct nouveau_object *object)
108 struct nouveau_gpio *gpio = (void *)object;
109 nouveau_event_destroy(&gpio->events);
110 nouveau_subdev_destroy(&gpio->base);
114 nouveau_gpio_create_(struct nouveau_object *parent,
115 struct nouveau_object *engine,
116 struct nouveau_oclass *oclass, int lines,
117 int length, void **pobject)
119 struct nouveau_gpio *gpio;
122 ret = nouveau_subdev_create_(parent, engine, oclass, 0, "GPIO", "gpio",
128 ret = nouveau_event_create(lines, &gpio->events);
132 gpio->find = nouveau_gpio_find;
133 gpio->set = nouveau_gpio_set;
134 gpio->get = nouveau_gpio_get;
138 static struct dmi_system_id gpio_reset_ids[] = {
140 .ident = "Apple Macbook 10,1",
142 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
143 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"),
150 nouveau_gpio_init(struct nouveau_gpio *gpio)
152 int ret = nouveau_subdev_init(&gpio->base);
153 if (ret == 0 && gpio->reset) {
154 if (dmi_check_system(gpio_reset_ids))
155 gpio->reset(gpio, DCB_GPIO_UNUSED);