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