/*
* 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[] = { 0 xe100, 0 xe28c };
u32 data = nvbios_rd32(bios, entry);
u8 line = (data & 0 x0000001f);
u8 func = (data & 0 x0000ff00) >> 8 ;
u8 defs = !!(data & 0 x01000000);
u8 unk0 = !!(data & 0 x02000000);
u8 unk1 = !!(data & 0 x04000000);
u32 val = (unk1 << 16 ) | unk0;
u32 reg = regs[line >> 4 ];
u32 lsh = line & 0 x0f;
if ( func == DCB_GPIO_UNUSED ||
(match != DCB_GPIO_UNUSED && match != func))
continue ;
nvkm_gpio_set(gpio, 0 , func, line, defs);
nvkm_mask(device, reg, 0 x00010001 << lsh, val << lsh);
}
}
static int
nv50_gpio_location(int line, u32 *reg, u32 *shift)
{
const u32 nv50_gpio_reg[4 ] = { 0 xe104, 0 xe108, 0 xe280, 0 xe284 };
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, 0 x00e054);
u32 stat = nvkm_rd32(device, 0 x00e050) & intr;
*lo = (stat & 0 xffff0000) >> 16 ;
*hi = (stat & 0 x0000ffff);
nvkm_wr32(device, 0 x00e054, 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, 0 x00e050);
if (type & NVKM_GPIO_LO)
inte = (inte & ~(mask << 16 )) | (data << 16 );
if (type & NVKM_GPIO_HI)
inte = (inte & ~mask) | data;
nvkm_wr32(device, 0 x00e050, 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, enum nvkm_subdev_type type, int inst,
struct nvkm_gpio **pgpio)
{
return nvkm_gpio_new_(&nv50_gpio, device, type, inst, pgpio);
}
Messung V0.5 in Prozent C=100 H=97 G=98
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-10-07)
¤
*© Formatika GbR, Deutschland