subdev/i2c/gk104.c

0001 /*
0002  * Copyright 2012 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Ben Skeggs
0023  */
0024 #include "priv.h"
0025 #include "pad.h"
0026
0027 void
0028 gk104_aux_stat(struct nvkm_i2c *i2c, u32 *hi, u32 *lo, u32 *rq, u32 *tx)
0029 {
0030     struct nvkm_device *device = i2c->subdev.device;
0031     u32 intr = nvkm_rd32(device, 0x00dc60);
0032     u32 stat = nvkm_rd32(device, 0x00dc68) & intr, i;
0033     for (i = 0, *hi = *lo = *rq = *tx = 0; i < 8; i++) {
0034         if ((stat & (1 << (i * 4)))) *hi |= 1 << i;
0035         if ((stat & (2 << (i * 4)))) *lo |= 1 << i;
0036         if ((stat & (4 << (i * 4)))) *rq |= 1 << i;
0037         if ((stat & (8 << (i * 4)))) *tx |= 1 << i;
0038     }
0039     nvkm_wr32(device, 0x00dc60, intr);
0040 }
0041
0042 void
0043 gk104_aux_mask(struct nvkm_i2c *i2c, u32 type, u32 mask, u32 data)
0044 {
0045     struct nvkm_device *device = i2c->subdev.device;
0046     u32 temp = nvkm_rd32(device, 0x00dc68), i;
0047     for (i = 0; i < 8; i++) {
0048         if (mask & (1 << i)) {
0049             if (!(data & (1 << i))) {
0050                 temp &= ~(type << (i * 4));
0051                 continue;
0052             }
0053             temp |= type << (i * 4);
0054         }
0055     }
0056     nvkm_wr32(device, 0x00dc68, temp);
0057 }
0058
0059 static const struct nvkm_i2c_func
0060 gk104_i2c = {
0061     .pad_x_new = gf119_i2c_pad_x_new,
0062     .pad_s_new = gf119_i2c_pad_s_new,
0063     .aux = 4,
0064     .aux_stat = gk104_aux_stat,
0065     .aux_mask = gk104_aux_mask,
0066 };
0067
0068 int
0069 gk104_i2c_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
0070           struct nvkm_i2c **pi2c)
0071 {
0072     return nvkm_i2c_new_(&gk104_i2c, device, type, inst, pi2c);
0073 }