LXR linux/drivers/gpu/drm/nouveau/nouveau

   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
  28struct 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
  41static inline void
  42hwsq_init(struct hwsq_ucode *hwsq)
  43{
  44        hwsq->ptr.u08 = hwsq->data;
  45        hwsq->reg = 0xffffffff;
  46        hwsq->val = 0xffffffff;
  47}
  48
  49static inline void
  50hwsq_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
  59static inline void
  60hwsq_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
  71static inline void
  72hwsq_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
  82static inline void
  83hwsq_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
  90static inline void
  91hwsq_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
 116