kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/gf110.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 "nv50.h"
  25
  26 static int
  27 gf110_i2c_sense_scl(struct nvkm_i2c_port *base)
  28 {
  29         struct nv50_i2c_priv *priv = (void *)nvkm_i2c(base);
  30         struct nv50_i2c_port *port = (void *)base;
  31         return !!(nv_rd32(priv, port->addr) & 0x00000010);
  32 }
  33
  34 static int
  35 gf110_i2c_sense_sda(struct nvkm_i2c_port *base)
  36 {
  37         struct nv50_i2c_priv *priv = (void *)nvkm_i2c(base);
  38         struct nv50_i2c_port *port = (void *)base;
  39         return !!(nv_rd32(priv, port->addr) & 0x00000020);
  40 }
  41
  42 static const struct nvkm_i2c_func
  43 gf110_i2c_func = {
  44         .drive_scl = nv50_i2c_drive_scl,
  45         .drive_sda = nv50_i2c_drive_sda,
  46         .sense_scl = gf110_i2c_sense_scl,
  47         .sense_sda = gf110_i2c_sense_sda,
  48 };
  49
  50 int
  51 gf110_i2c_port_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
  52                     struct nvkm_oclass *oclass, void *data, u32 index,
  53                     struct nvkm_object **pobject)
  54 {
  55         struct dcb_i2c_entry *info = data;
  56         struct nv50_i2c_port *port;
  57         int ret;
  58
  59         ret = nvkm_i2c_port_create(parent, engine, oclass, index,
  60                                    &nvkm_i2c_bit_algo, &gf110_i2c_func, &port);
  61         *pobject = nv_object(port);
  62         if (ret)
  63                 return ret;
  64
  65         port->state = 0x00000007;
  66         port->addr = 0x00d014 + (info->drive * 0x20);
  67         return 0;
  68 }
  69
  70 struct nvkm_oclass
  71 gf110_i2c_sclass[] = {
  72         { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NVIO_BIT),
  73           .ofuncs = &(struct nvkm_ofuncs) {
  74                   .ctor = gf110_i2c_port_ctor,
  75                   .dtor = _nvkm_i2c_port_dtor,
  76                   .init = nv50_i2c_port_init,
  77                   .fini = _nvkm_i2c_port_fini,
  78           },
  79         },
  80         { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NVIO_AUX),
  81           .ofuncs = &(struct nvkm_ofuncs) {
  82                   .ctor = g94_aux_port_ctor,
  83                   .dtor = _nvkm_i2c_port_dtor,
  84                   .init = _nvkm_i2c_port_init,
  85                   .fini = _nvkm_i2c_port_fini,
  86           },
  87         },
  88         {}
  89 };
  90
  91 struct nvkm_oclass *
  92 gf110_i2c_oclass = &(struct nvkm_i2c_impl) {
  93         .base.handle = NV_SUBDEV(I2C, 0xd0),
  94         .base.ofuncs = &(struct nvkm_ofuncs) {
  95                 .ctor = _nvkm_i2c_ctor,
  96                 .dtor = _nvkm_i2c_dtor,
  97                 .init = _nvkm_i2c_init,
  98                 .fini = _nvkm_i2c_fini,
  99         },
 100         .sclass = gf110_i2c_sclass,
 101         .pad_x = &nv04_i2c_pad_oclass,
 102         .pad_s = &g94_i2c_pad_oclass,
 103         .aux = 4,
 104         .aux_stat = g94_aux_stat,
 105         .aux_mask = g94_aux_mask,
 106 }.base;