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/*
* Copyright 2021 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.
*/
#include "priv.h"
static void
ga102_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))) {
u32 data = nvbios_rd32(bios, entry);
u8 line = (data & 0x0000003f);
u8 defs = !!(data & 0x00000080);
u8 func = (data & 0x0000ff00) >> 8;
u8 unk0 = (data & 0x00ff0000) >> 16;
u8 unk1 = (data & 0x1f000000) >> 24;
if ( func == DCB_GPIO_UNUSED ||
(match != DCB_GPIO_UNUSED && match != func))
continue;
nvkm_gpio_set(gpio, 0, func, line, defs);
nvkm_mask(device, 0x021200 + (line * 4), 0xff, unk0);
if (unk1--)
nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
}
}
static int
ga102_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
{
struct nvkm_device *device = gpio->subdev.device;
u32 data = ((dir ^ 1) << 13) | (out << 12);
nvkm_mask(device, 0x021200 + (line * 4), 0x00003000, data);
nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
return 0;
}
static int
ga102_gpio_sense(struct nvkm_gpio *gpio, int line)
{
struct nvkm_device *device = gpio->subdev.device;
return !!(nvkm_rd32(device, 0x021200 + (line * 4)) & 0x00004000);
}
static void
ga102_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
{
struct nvkm_device *device = gpio->subdev.device;
u32 intr0 = nvkm_rd32(device, 0x021640);
u32 intr1 = nvkm_rd32(device, 0x02164c);
u32 stat0 = nvkm_rd32(device, 0x021648) & intr0;
u32 stat1 = nvkm_rd32(device, 0x021654) & intr1;
*lo = (stat1 & 0xffff0000) | (stat0 >> 16);
*hi = (stat1 << 16) | (stat0 & 0x0000ffff);
nvkm_wr32(device, 0x021640, intr0);
nvkm_wr32(device, 0x02164c, intr1);
}
static void
ga102_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
{
struct nvkm_device *device = gpio->subdev.device;
u32 inte0 = nvkm_rd32(device, 0x021648);
u32 inte1 = nvkm_rd32(device, 0x021654);
if (type & NVKM_GPIO_LO)
inte0 = (inte0 & ~(mask << 16)) | (data << 16);
if (type & NVKM_GPIO_HI)
inte0 = (inte0 & ~(mask & 0xffff)) | (data & 0xffff);
mask >>= 16;
data >>= 16;
if (type & NVKM_GPIO_LO)
inte1 = (inte1 & ~(mask << 16)) | (data << 16);
if (type & NVKM_GPIO_HI)
inte1 = (inte1 & ~mask) | data;
nvkm_wr32(device, 0x021648, inte0);
nvkm_wr32(device, 0x021654, inte1);
}
static const struct nvkm_gpio_func
ga102_gpio = {
.lines = 32,
.intr_stat = ga102_gpio_intr_stat,
.intr_mask = ga102_gpio_intr_mask,
.drive = ga102_gpio_drive,
.sense = ga102_gpio_sense,
.reset = ga102_gpio_reset,
};
int
ga102_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_gpio **pgpio)
{
return nvkm_gpio_new_(&ga102_gpio, device, type, inst, pgpio);
}
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