drivers/gpu/drm/nouveau/nouveau_hwsq.h

   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
   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
  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