include/nouveau_pms.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 (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21  * OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors: Ben Skeggs
  24  */
  25
  26 #ifndef NOUVEAU_PMS_H
  27 #define NOUVEAU_PMS_H
  28
  29 struct pms_ucode {
  30         u8 data[256];
  31         union {
  32                 u8  *u08;
  33                 u16 *u16;
  34                 u32 *u32;
  35         } ptr;
  36         u16 len;
  37
  38         u32 reg;
  39         u32 val;
  40 };
  41
  42 static inline void
  43 pms_init(struct pms_ucode *pms)
  44 {
  45         pms->ptr.u08 = pms->data;
  46         pms->reg = 0xffffffff;
  47         pms->val = 0xffffffff;
  48 }
  49
  50 static inline void
  51 pms_fini(struct pms_ucode *pms)
  52 {
  53         do {
  54                 *pms->ptr.u08++ = 0x7f;
  55                 pms->len = pms->ptr.u08 - pms->data;
  56         } while (pms->len & 3);
  57         pms->ptr.u08 = pms->data;
  58 }
  59
  60 static inline void
  61 pms_unkn(struct pms_ucode *pms, u8 v0)
  62 {
  63         *pms->ptr.u08++ = v0;
  64 }
  65
  66 static inline void
  67 pms_op5f(struct pms_ucode *pms, u8 v0, u8 v1)
  68 {
  69         *pms->ptr.u08++ = 0x5f;
  70         *pms->ptr.u08++ = v0;
  71         *pms->ptr.u08++ = v1;
  72 }
  73
  74 static inline void
  75 pms_wr32(struct pms_ucode *pms, u32 reg, u32 val)
  76 {
  77         if (val != pms->val) {
  78                 if ((val & 0xffff0000) == (pms->val & 0xffff0000)) {
  79                         *pms->ptr.u08++ = 0x42;
  80                         *pms->ptr.u16++ = (val & 0x0000ffff);
  81                 } else {
  82                         *pms->ptr.u08++ = 0xe2;
  83                         *pms->ptr.u32++ = val;
  84                 }
  85
  86                 pms->val = val;
  87         }
  88
  89         if ((reg & 0xffff0000) == (pms->reg & 0xffff0000)) {
  90                 *pms->ptr.u08++ = 0x40;
  91                 *pms->ptr.u16++ = (reg & 0x0000ffff);
  92         } else {
  93                 *pms->ptr.u08++ = 0xe0;
  94                 *pms->ptr.u32++ = reg;
  95         }
  96         pms->reg = reg;
  97 }
  98
  99 #endif