LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/padgm200.c

   1/*
   2 * Copyright 2014 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 "pad.h"
  25#include "aux.h"
  26#include "bus.h"
  27
  28static void
  29gm200_i2c_pad_mode(struct nvkm_i2c_pad *pad, enum nvkm_i2c_pad_mode mode)
  30{
  31        struct nvkm_subdev *subdev = &pad->i2c->subdev;
  32        struct nvkm_device *device = subdev->device;
  33        const u32 base = (pad->id - NVKM_I2C_PAD_HYBRID(0)) * 0x50;
  34
  35        switch (mode) {
  36        case NVKM_I2C_PAD_OFF:
  37                nvkm_mask(device, 0x00d97c + base, 0x00000001, 0x00000001);
  38                break;
  39        case NVKM_I2C_PAD_I2C:
  40                nvkm_mask(device, 0x00d970 + base, 0x0000c003, 0x0000c001);
  41                nvkm_mask(device, 0x00d97c + base, 0x00000001, 0x00000000);
  42                break;
  43        case NVKM_I2C_PAD_AUX:
  44                nvkm_mask(device, 0x00d970 + base, 0x0000c003, 0x00000002);
  45                nvkm_mask(device, 0x00d97c + base, 0x00000001, 0x00000000);
  46                break;
  47        default:
  48                WARN_ON(1);
  49                break;
  50        }
  51}
  52
  53static const struct nvkm_i2c_pad_func
  54gm200_i2c_pad_s_func = {
  55        .bus_new_4 = gf119_i2c_bus_new,
  56        .aux_new_6 = gm200_i2c_aux_new,
  57        .mode = gm200_i2c_pad_mode,
  58};
  59
  60int
  61gm200_i2c_pad_s_new(struct nvkm_i2c *i2c, int id, struct nvkm_i2c_pad **ppad)
  62{
  63        return nvkm_i2c_pad_new_(&gm200_i2c_pad_s_func, i2c, id, ppad);
  64}
  65
  66static const struct nvkm_i2c_pad_func
  67gm200_i2c_pad_x_func = {
  68        .bus_new_4 = gf119_i2c_bus_new,
  69        .aux_new_6 = gm200_i2c_aux_new,
  70};
  71
  72int
  73gm200_i2c_pad_x_new(struct nvkm_i2c *i2c, int id, struct nvkm_i2c_pad **ppad)
  74{
  75        return nvkm_i2c_pad_new_(&gm200_i2c_pad_x_func, i2c, id, ppad);
  76}
  77