LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/gf119.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
  26void
  27gf119_gpio_reset(struct nvkm_gpio *gpio, u8 match)
  28{
  29        struct nvkm_device *device = gpio->subdev.device;
  30        struct nvkm_bios *bios = device->bios;
  31        u8 ver, len;
  32        u16 entry;
  33        int ent = -1;
  34
  35        while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
  36                u32 data = nvbios_rd32(bios, entry);
  37                u8  line =   (data & 0x0000003f);
  38                u8  defs = !!(data & 0x00000080);
  39                u8  func =   (data & 0x0000ff00) >> 8;
  40                u8  unk0 =   (data & 0x00ff0000) >> 16;
  41                u8  unk1 =   (data & 0x1f000000) >> 24;
  42
  43                if ( func  == DCB_GPIO_UNUSED ||
  44                    (match != DCB_GPIO_UNUSED && match != func))
  45                        continue;
  46
  47                nvkm_gpio_set(gpio, 0, func, line, defs);
  48
  49                nvkm_mask(device, 0x00d610 + (line * 4), 0xff, unk0);
  50                if (unk1--)
  51                        nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
  52        }
  53}
  54
  55int
  56gf119_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
  57{
  58        struct nvkm_device *device = gpio->subdev.device;
  59        u32 data = ((dir ^ 1) << 13) | (out << 12);
  60        nvkm_mask(device, 0x00d610 + (line * 4), 0x00003000, data);
  61        nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
  62        return 0;
  63}
  64
  65int
  66gf119_gpio_sense(struct nvkm_gpio *gpio, int line)
  67{
  68        struct nvkm_device *device = gpio->subdev.device;
  69        return !!(nvkm_rd32(device, 0x00d610 + (line * 4)) & 0x00004000);
  70}
  71
  72static const struct nvkm_gpio_func
  73gf119_gpio = {
  74        .lines = 32,
  75        .intr_stat = g94_gpio_intr_stat,
  76        .intr_mask = g94_gpio_intr_mask,
  77        .drive = gf119_gpio_drive,
  78        .sense = gf119_gpio_sense,
  79        .reset = gf119_gpio_reset,
  80};
  81
  82int
  83gf119_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
  84{
  85        return nvkm_gpio_new_(&gf119_gpio, device, index, pgpio);
  86}
  87