LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/gk104.c

   1/*
   2 * Copyright 2012 Red Hat Inc.
   3 *
   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:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  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.
  21 *
  22 * Authors: Ben Skeggs
  23 */
  24#include "priv.h"
  25
  26static void
  27gk104_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
  28{
  29        struct nvkm_device *device = gpio->subdev.device;
  30        u32 intr0 = nvkm_rd32(device, 0x00dc00);
  31        u32 intr1 = nvkm_rd32(device, 0x00dc80);
  32        u32 stat0 = nvkm_rd32(device, 0x00dc08) & intr0;
  33        u32 stat1 = nvkm_rd32(device, 0x00dc88) & intr1;
  34        *lo = (stat1 & 0xffff0000) | (stat0 >> 16);
  35        *hi = (stat1 << 16) | (stat0 & 0x0000ffff);
  36        nvkm_wr32(device, 0x00dc00, intr0);
  37        nvkm_wr32(device, 0x00dc80, intr1);
  38}
  39
  40static void
  41gk104_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
  42{
  43        struct nvkm_device *device = gpio->subdev.device;
  44        u32 inte0 = nvkm_rd32(device, 0x00dc08);
  45        u32 inte1 = nvkm_rd32(device, 0x00dc88);
  46        if (type & NVKM_GPIO_LO)
  47                inte0 = (inte0 & ~(mask << 16)) | (data << 16);
  48        if (type & NVKM_GPIO_HI)
  49                inte0 = (inte0 & ~(mask & 0xffff)) | (data & 0xffff);
  50        mask >>= 16;
  51        data >>= 16;
  52        if (type & NVKM_GPIO_LO)
  53                inte1 = (inte1 & ~(mask << 16)) | (data << 16);
  54        if (type & NVKM_GPIO_HI)
  55                inte1 = (inte1 & ~mask) | data;
  56        nvkm_wr32(device, 0x00dc08, inte0);
  57        nvkm_wr32(device, 0x00dc88, inte1);
  58}
  59
  60static const struct nvkm_gpio_func
  61gk104_gpio = {
  62        .lines = 32,
  63        .intr_stat = gk104_gpio_intr_stat,
  64        .intr_mask = gk104_gpio_intr_mask,
  65        .drive = gf119_gpio_drive,
  66        .sense = gf119_gpio_sense,
  67        .reset = gf119_gpio_reset,
  68};
  69
  70int
  71gk104_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
  72               struct nvkm_gpio **pgpio)
  73{
  74        return nvkm_gpio_new_(&gk104_gpio, device, type, inst, pgpio);
  75}
  76