1 /* $NetBSD: nouveau_engine_disp_dacnv50.c,v 1.2 2014/08/23 08:03:33 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: nouveau_engine_disp_dacnv50.c,v 1.2 2014/08/23 08:03:33 riastradh Exp $");
29
30 #include <core/os.h>
31 #include <core/class.h>
32
33 #include <subdev/bios.h>
34 #include <subdev/bios/dcb.h>
35 #include <subdev/timer.h>
36
37 #include "nv50.h"
38
39 int
nv50_dac_power(struct nv50_disp_priv * priv,int or,u32 data)40 nv50_dac_power(struct nv50_disp_priv *priv, int or, u32 data)
41 {
42 const u32 stat = (data & NV50_DISP_DAC_PWR_HSYNC) |
43 (data & NV50_DISP_DAC_PWR_VSYNC) |
44 (data & NV50_DISP_DAC_PWR_DATA) |
45 (data & NV50_DISP_DAC_PWR_STATE);
46 const u32 doff = (or * 0x800);
47 nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
48 nv_mask(priv, 0x61a004 + doff, 0xc000007f, 0x80000000 | stat);
49 nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
50 return 0;
51 }
52
53 int
nv50_dac_sense(struct nv50_disp_priv * priv,int or,u32 loadval)54 nv50_dac_sense(struct nv50_disp_priv *priv, int or, u32 loadval)
55 {
56 const u32 doff = (or * 0x800);
57
58 nv_mask(priv, 0x61a004 + doff, 0x807f0000, 0x80150000);
59 nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
60
61 nv_wr32(priv, 0x61a00c + doff, 0x00100000 | loadval);
62 mdelay(9);
63 udelay(500);
64 loadval = nv_mask(priv, 0x61a00c + doff, 0xffffffff, 0x00000000);
65
66 nv_mask(priv, 0x61a004 + doff, 0x807f0000, 0x80550000);
67 nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
68
69 nv_debug(priv, "DAC%d sense: 0x%08x\n", or, loadval);
70 if (!(loadval & 0x80000000))
71 return -ETIMEDOUT;
72
73 return (loadval & 0x38000000) >> 27;
74 }
75
76 int
nv50_dac_mthd(struct nouveau_object * object,u32 mthd,void * args,u32 size)77 nv50_dac_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
78 {
79 struct nv50_disp_priv *priv = (void *)object->engine;
80 const u8 or = (mthd & NV50_DISP_DAC_MTHD_OR);
81 u32 *data = args;
82 int ret;
83
84 if (size < sizeof(u32))
85 return -EINVAL;
86
87 switch (mthd & ~0x3f) {
88 case NV50_DISP_DAC_PWR:
89 ret = priv->dac.power(priv, or, data[0]);
90 break;
91 case NV50_DISP_DAC_LOAD:
92 ret = priv->dac.sense(priv, or, data[0]);
93 if (ret >= 0) {
94 data[0] = ret;
95 ret = 0;
96 }
97 break;
98 default:
99 BUG_ON(1);
100 ret = -EIO; /* XXX GCC */
101 }
102
103 return ret;
104 }
105