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/*
* Copyright 2010 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/

#ifndef __NOUVEAU_HWSQ_H__
#define __NOUVEAU_HWSQ_H__

struct hwsq_ucode {
u8 data[0x200];
union {
u8 *u08;
u16 *u16;
u32 *u32;
} ptr;
u16 len;

u32 reg;
u32 val;
};

static inline void
hwsq_init(struct hwsq_ucode *hwsq)
{
hwsq->ptr.u08 = hwsq->data;
hwsq->reg = 0xffffffff;
hwsq->val = 0xffffffff;
}

static inline void
hwsq_fini(struct hwsq_ucode *hwsq)
{
do {
*hwsq->ptr.u08++ = 0x7f;
hwsq->len = hwsq->ptr.u08 - hwsq->data;
} while (hwsq->len & 3);
hwsq->ptr.u08 = hwsq->data;
}

static inline void
hwsq_usec(struct hwsq_ucode *hwsq, u8 usec)
{
u32 shift = 0;
while (usec & ~3) {
usec >>= 2;
shift++;
}

*hwsq->ptr.u08++ = (shift << 2) | usec;
}

static inline void
hwsq_setf(struct hwsq_ucode *hwsq, u8 flag, int val)
{
flag += 0x80;
if (val >= 0)
flag += 0x20;
if (val >= 1)
flag += 0x20;
*hwsq->ptr.u08++ = flag;
}

static inline void
hwsq_op5f(struct hwsq_ucode *hwsq, u8 v0, u8 v1)
{
*hwsq->ptr.u08++ = 0x5f;
*hwsq->ptr.u08++ = v0;
*hwsq->ptr.u08++ = v1;
}

static inline void
hwsq_wr32(struct hwsq_ucode *hwsq, u32 reg, u32 val)
{
if (val != hwsq->val) {
if ((val & 0xffff0000) == (hwsq->val & 0xffff0000)) {
*hwsq->ptr.u08++ = 0x42;
*hwsq->ptr.u16++ = (val & 0x0000ffff);
} else {
*hwsq->ptr.u08++ = 0xe2;
*hwsq->ptr.u32++ = val;
}

hwsq->val = val;
}

if ((reg & 0xffff0000) == (hwsq->reg & 0xffff0000)) {
*hwsq->ptr.u08++ = 0x40;
*hwsq->ptr.u16++ = (reg & 0x0000ffff);
} else {
*hwsq->ptr.u08++ = 0xe0;
*hwsq->ptr.u32++ = reg;
}
hwsq->reg = reg;
}

#endif
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