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/*
* Copyright 2012 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 "priv.h"
void
nv50_gpio_reset(struct nvkm_gpio *gpio, u8 match)
{
struct nvkm_device *device = gpio->subdev.device;
struct nvkm_bios *bios = device->bios;
u8 ver, len;
u16 entry;
int ent = -1;
while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
static const u32 regs[] = { 0xe100, 0xe28c };
u32 data = nvbios_rd32(bios, entry);
u8 line = (data & 0x0000001f);
u8 func = (data & 0x0000ff00) >> 8;
u8 defs = !!(data & 0x01000000);
u8 unk0 = !!(data & 0x02000000);
u8 unk1 = !!(data & 0x04000000);
u32 val = (unk1 << 16) | unk0;
u32 reg = regs[line >> 4];
u32 lsh = line & 0x0f;
if ( func == DCB_GPIO_UNUSED ||
(match != DCB_GPIO_UNUSED && match != func))
continue;
nvkm_gpio_set(gpio, 0, func, line, defs);
nvkm_mask(device, reg, 0x00010001 << lsh, val << lsh);
}
}
static int
nv50_gpio_location(int line, u32 *reg, u32 *shift)
{
const u32 nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 };
if (line >= 32)
return -EINVAL;
*reg = nv50_gpio_reg[line >> 3];
*shift = (line & 7) << 2;
return 0;
}
int
nv50_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
{
struct nvkm_device *device = gpio->subdev.device;
u32 reg, shift;
if (nv50_gpio_location(line, ®, &shift))
return -EINVAL;
nvkm_mask(device, reg, 3 << shift, (((dir ^ 1) << 1) | out) << shift);
return 0;
}
int
nv50_gpio_sense(struct nvkm_gpio *gpio, int line)
{
struct nvkm_device *device = gpio->subdev.device;
u32 reg, shift;
if (nv50_gpio_location(line, ®, &shift))
return -EINVAL;
return !!(nvkm_rd32(device, reg) & (4 << shift));
}
static void
nv50_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
{
struct nvkm_device *device = gpio->subdev.device;
u32 intr = nvkm_rd32(device, 0x00e054);
u32 stat = nvkm_rd32(device, 0x00e050) & intr;
*lo = (stat & 0xffff0000) >> 16;
*hi = (stat & 0x0000ffff);
nvkm_wr32(device, 0x00e054, intr);
}
static void
nv50_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
{
struct nvkm_device *device = gpio->subdev.device;
u32 inte = nvkm_rd32(device, 0x00e050);
if (type & NVKM_GPIO_LO)
inte = (inte & ~(mask << 16)) | (data << 16);
if (type & NVKM_GPIO_HI)
inte = (inte & ~mask) | data;
nvkm_wr32(device, 0x00e050, inte);
}
static const struct nvkm_gpio_func
nv50_gpio = {
.lines = 16,
.intr_stat = nv50_gpio_intr_stat,
.intr_mask = nv50_gpio_intr_mask,
.drive = nv50_gpio_drive,
.sense = nv50_gpio_sense,
.reset = nv50_gpio_reset,
};
int
nv50_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
{
return nvkm_gpio_new_(&nv50_gpio, device, index, pgpio);
}
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