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/*
* Copyright 2011 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include <subdev/gpio.h>
#include <subdev/bios.h>
#include <subdev/bios/gpio.h>
static int
nouveau_gpio_drive(struct nouveau_gpio *gpio,
int idx, int line, int dir, int out)
{
return gpio->drive ? gpio->drive(gpio, line, dir, out) : -ENODEV;
}
static int
nouveau_gpio_sense(struct nouveau_gpio *gpio, int idx, int line)
{
return gpio->sense ? gpio->sense(gpio, line) : -ENODEV;
}
static int
nouveau_gpio_find(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line,
struct dcb_gpio_func *func)
{
struct nouveau_bios *bios = nouveau_bios(gpio);
u8 ver, len;
u16 data;
if (line == 0xff && tag == 0xff)
return -EINVAL;
data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func);
if (data)
return 0;
/* Apple iMac G4 NV18 */
if (nv_device_match(nv_object(gpio), 0x0189, 0x10de, 0x0010)) {
if (tag == DCB_GPIO_TVDAC0) {
*func = (struct dcb_gpio_func) {
.func = DCB_GPIO_TVDAC0,
.line = 4,
.log[0] = 0,
.log[1] = 1,
};
return 0;
}
}
return -ENOENT;
}
static int
nouveau_gpio_set(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line, int state)
{
struct dcb_gpio_func func;
int ret;
ret = nouveau_gpio_find(gpio, idx, tag, line, &func);
if (ret == 0) {
int dir = !!(func.log[state] & 0x02);
int out = !!(func.log[state] & 0x01);
ret = nouveau_gpio_drive(gpio, idx, func.line, dir, out);
}
return ret;
}
static int
nouveau_gpio_get(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line)
{
struct dcb_gpio_func func;
int ret;
ret = nouveau_gpio_find(gpio, idx, tag, line, &func);
if (ret == 0) {
ret = nouveau_gpio_sense(gpio, idx, func.line);
if (ret >= 0)
ret = (ret == (func.log[1] & 1));
}
return ret;
}
void
_nouveau_gpio_dtor(struct nouveau_object *object)
{
struct nouveau_gpio *gpio = (void *)object;
nouveau_event_destroy(&gpio->events);
nouveau_subdev_destroy(&gpio->base);
}
int
nouveau_gpio_create_(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass, int lines,
int length, void **pobject)
{
struct nouveau_gpio *gpio;
int ret;
ret = nouveau_subdev_create_(parent, engine, oclass, 0, "GPIO", "gpio",
length, pobject);
gpio = *pobject;
if (ret)
return ret;
ret = nouveau_event_create(lines, &gpio->events);
if (ret)
return ret;
gpio->find = nouveau_gpio_find;
gpio->set = nouveau_gpio_set;
gpio->get = nouveau_gpio_get;
return 0;
}
static struct dmi_system_id gpio_reset_ids[] = {
{
.ident = "Apple Macbook 10,1",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"),
}
},
{ }
};
int
nouveau_gpio_init(struct nouveau_gpio *gpio)
{
int ret = nouveau_subdev_init(&gpio->base);
if (ret == 0 && gpio->reset) {
if (dmi_check_system(gpio_reset_ids))
gpio->reset(gpio, DCB_GPIO_UNUSED);
}
return ret;
}
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