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nouveau_hwsq.h
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1 /*
2  * Copyright 2010 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
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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
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21  *
22  * Authors: Ben Skeggs
23  */
24 
25 #ifndef __NOUVEAU_HWSQ_H__
26 #define __NOUVEAU_HWSQ_H__
27 
28 struct hwsq_ucode {
29  u8 data[0x200];
30  union {
31  u8 *u08;
32  u16 *u16;
33  u32 *u32;
34  } ptr;
35  u16 len;
36 
37  u32 reg;
38  u32 val;
39 };
40 
41 static inline void
42 hwsq_init(struct hwsq_ucode *hwsq)
43 {
44  hwsq->ptr.u08 = hwsq->data;
45  hwsq->reg = 0xffffffff;
46  hwsq->val = 0xffffffff;
47 }
48 
49 static inline void
50 hwsq_fini(struct hwsq_ucode *hwsq)
51 {
52  do {
53  *hwsq->ptr.u08++ = 0x7f;
54  hwsq->len = hwsq->ptr.u08 - hwsq->data;
55  } while (hwsq->len & 3);
56  hwsq->ptr.u08 = hwsq->data;
57 }
58 
59 static inline void
60 hwsq_usec(struct hwsq_ucode *hwsq, u8 usec)
61 {
62  u32 shift = 0;
63  while (usec & ~3) {
64  usec >>= 2;
65  shift++;
66  }
67 
68  *hwsq->ptr.u08++ = (shift << 2) | usec;
69 }
70 
71 static inline void
72 hwsq_setf(struct hwsq_ucode *hwsq, u8 flag, int val)
73 {
74  flag += 0x80;
75  if (val >= 0)
76  flag += 0x20;
77  if (val >= 1)
78  flag += 0x20;
79  *hwsq->ptr.u08++ = flag;
80 }
81 
82 static inline void
83 hwsq_op5f(struct hwsq_ucode *hwsq, u8 v0, u8 v1)
84 {
85  *hwsq->ptr.u08++ = 0x5f;
86  *hwsq->ptr.u08++ = v0;
87  *hwsq->ptr.u08++ = v1;
88 }
89 
90 static inline void
91 hwsq_wr32(struct hwsq_ucode *hwsq, u32 reg, u32 val)
92 {
93  if (val != hwsq->val) {
94  if ((val & 0xffff0000) == (hwsq->val & 0xffff0000)) {
95  *hwsq->ptr.u08++ = 0x42;
96  *hwsq->ptr.u16++ = (val & 0x0000ffff);
97  } else {
98  *hwsq->ptr.u08++ = 0xe2;
99  *hwsq->ptr.u32++ = val;
100  }
101 
102  hwsq->val = val;
103  }
104 
105  if ((reg & 0xffff0000) == (hwsq->reg & 0xffff0000)) {
106  *hwsq->ptr.u08++ = 0x40;
107  *hwsq->ptr.u16++ = (reg & 0x0000ffff);
108  } else {
109  *hwsq->ptr.u08++ = 0xe0;
110  *hwsq->ptr.u32++ = reg;
111  }
112  hwsq->reg = reg;
113 }
114 
115 #endif
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