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/*
* Copyright 2008 Stuart Bennett
*
* 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 AUTHORS 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.
*/

#ifndef __NOUVEAU_HW_H__
#define __NOUVEAU_HW_H__

#include "drmP.h"
#include "nouveau_drv.h"

#define MASK(field) ( \
(0xffffffff >> (31 - ((1 ? field) - (0 ? field)))) << (0 ? field))

#define XLATE(src, srclowbit, outfield) ( \
(((src) >> (srclowbit)) << (0 ? outfield)) & MASK(outfield))

void NVWriteVgaSeq(struct drm_device *, int head, uint8_t index, uint8_t value);
uint8_t NVReadVgaSeq(struct drm_device *, int head, uint8_t index);
void NVWriteVgaGr(struct drm_device *, int head, uint8_t index, uint8_t value);
uint8_t NVReadVgaGr(struct drm_device *, int head, uint8_t index);
void NVSetOwner(struct drm_device *, int owner);
void NVBlankScreen(struct drm_device *, int head, bool blank);
void nouveau_hw_setpll(struct drm_device *, uint32_t reg1,
struct nouveau_pll_vals *pv);
int nouveau_hw_get_pllvals(struct drm_device *, enum pll_types plltype,
struct nouveau_pll_vals *pllvals);
int nouveau_hw_pllvals_to_clk(struct nouveau_pll_vals *pllvals);
int nouveau_hw_get_clock(struct drm_device *, enum pll_types plltype);
void nouveau_hw_save_vga_fonts(struct drm_device *, bool save);
void nouveau_hw_save_state(struct drm_device *, int head,
struct nv04_mode_state *state);
void nouveau_hw_load_state(struct drm_device *, int head,
struct nv04_mode_state *state);
void nouveau_hw_load_state_palette(struct drm_device *, int head,
struct nv04_mode_state *state);

/* nouveau_calc.c */
extern void nouveau_calc_arb(struct drm_device *, int vclk, int bpp,
int *burst, int *lwm);
extern int nouveau_calc_pll_mnp(struct drm_device *, struct pll_lims *pll_lim,
int clk, struct nouveau_pll_vals *pv);

static inline uint32_t
nvReadMC(struct drm_device *dev, uint32_t reg)
{
uint32_t val = nv_rd32(dev, reg);
NV_REG_DEBUG(MC, dev, "reg %08x val %08x\n", reg, val);
return val;
}

static inline void
nvWriteMC(struct drm_device *dev, uint32_t reg, uint32_t val)
{
NV_REG_DEBUG(MC, dev, "reg %08x val %08x\n", reg, val);
nv_wr32(dev, reg, val);
}

static inline uint32_t
nvReadVIDEO(struct drm_device *dev, uint32_t reg)
{
uint32_t val = nv_rd32(dev, reg);
NV_REG_DEBUG(VIDEO, dev, "reg %08x val %08x\n", reg, val);
return val;
}

static inline void
nvWriteVIDEO(struct drm_device *dev, uint32_t reg, uint32_t val)
{
NV_REG_DEBUG(VIDEO, dev, "reg %08x val %08x\n", reg, val);
nv_wr32(dev, reg, val);
}

static inline uint32_t
nvReadFB(struct drm_device *dev, uint32_t reg)
{
uint32_t val = nv_rd32(dev, reg);
NV_REG_DEBUG(FB, dev, "reg %08x val %08x\n", reg, val);
return val;
}

static inline void
nvWriteFB(struct drm_device *dev, uint32_t reg, uint32_t val)
{
NV_REG_DEBUG(FB, dev, "reg %08x val %08x\n", reg, val);
nv_wr32(dev, reg, val);
}

static inline uint32_t
nvReadEXTDEV(struct drm_device *dev, uint32_t reg)
{
uint32_t val = nv_rd32(dev, reg);
NV_REG_DEBUG(EXTDEV, dev, "reg %08x val %08x\n", reg, val);
return val;
}

static inline void
nvWriteEXTDEV(struct drm_device *dev, uint32_t reg, uint32_t val)
{
NV_REG_DEBUG(EXTDEV, dev, "reg %08x val %08x\n", reg, val);
nv_wr32(dev, reg, val);
}

static inline uint32_t NVReadCRTC(struct drm_device *dev,
int head, uint32_t reg)
{
uint32_t val;
if (head)
reg += NV_PCRTC0_SIZE;
val = nv_rd32(dev, reg);
NV_REG_DEBUG(CRTC, dev, "head %d reg %08x val %08x\n", head, reg, val);
return val;
}

static inline void NVWriteCRTC(struct drm_device *dev,
int head, uint32_t reg, uint32_t val)
{
if (head)
reg += NV_PCRTC0_SIZE;
NV_REG_DEBUG(CRTC, dev, "head %d reg %08x val %08x\n", head, reg, val);
nv_wr32(dev, reg, val);
}

static inline uint32_t NVReadRAMDAC(struct drm_device *dev,
int head, uint32_t reg)
{
uint32_t val;
if (head)
reg += NV_PRAMDAC0_SIZE;
val = nv_rd32(dev, reg);
NV_REG_DEBUG(RAMDAC, dev, "head %d reg %08x val %08x\n",
head, reg, val);
return val;
}

static inline void NVWriteRAMDAC(struct drm_device *dev,
int head, uint32_t reg, uint32_t val)
{
if (head)
reg += NV_PRAMDAC0_SIZE;
NV_REG_DEBUG(RAMDAC, dev, "head %d reg %08x val %08x\n",
head, reg, val);
nv_wr32(dev, reg, val);
}

static inline uint8_t nv_read_tmds(struct drm_device *dev,
int or, int dl, uint8_t address)
{
int ramdac = (or & OUTPUT_C) >> 2;

NVWriteRAMDAC(dev, ramdac, NV_PRAMDAC_FP_TMDS_CONTROL + dl * 8,
NV_PRAMDAC_FP_TMDS_CONTROL_WRITE_DISABLE | address);
return NVReadRAMDAC(dev, ramdac, NV_PRAMDAC_FP_TMDS_DATA + dl * 8);
}

static inline void nv_write_tmds(struct drm_device *dev,
int or, int dl, uint8_t address,
uint8_t data)
{
int ramdac = (or & OUTPUT_C) >> 2;

NVWriteRAMDAC(dev, ramdac, NV_PRAMDAC_FP_TMDS_DATA + dl * 8, data);
NVWriteRAMDAC(dev, ramdac, NV_PRAMDAC_FP_TMDS_CONTROL + dl * 8, address);
}

static inline void NVWriteVgaCrtc(struct drm_device *dev,
int head, uint8_t index, uint8_t value)
{
NV_REG_DEBUG(VGACRTC, dev, "head %d index 0x%02x data 0x%02x\n",
head, index, value);
nv_wr08(dev, NV_PRMCIO_CRX__COLOR + head * NV_PRMCIO_SIZE, index);
nv_wr08(dev, NV_PRMCIO_CR__COLOR + head * NV_PRMCIO_SIZE, value);
}

static inline uint8_t NVReadVgaCrtc(struct drm_device *dev,
int head, uint8_t index)
{
uint8_t val;
nv_wr08(dev, NV_PRMCIO_CRX__COLOR + head * NV_PRMCIO_SIZE, index);
val = nv_rd08(dev, NV_PRMCIO_CR__COLOR + head * NV_PRMCIO_SIZE);
NV_REG_DEBUG(VGACRTC, dev, "head %d index 0x%02x data 0x%02x\n",
head, index, val);
return val;
}

/* CR57 and CR58 are a fun pair of regs. CR57 provides an index (0-0xf) for CR58
* I suspect they in fact do nothing, but are merely a way to carry useful
* per-head variables around
*
* Known uses:
* CR57 CR58
* 0x00 index to the appropriate dcb entry (or 7f for inactive)
* 0x02 dcb entry's "or" value (or 00 for inactive)
* 0x03 bit0 set for dual link (LVDS, possibly elsewhere too)
* 0x08 or 0x09 pxclk in MHz
* 0x0f laptop panel info - low nibble for PEXTDEV_BOOT_0 strap
* high nibble for xlat strap value
*/

static inline void
NVWriteVgaCrtc5758(struct drm_device *dev, int head, uint8_t index, uint8_t value)
{
NVWriteVgaCrtc(dev, head, NV_CIO_CRE_57, index);
NVWriteVgaCrtc(dev, head, NV_CIO_CRE_58, value);
}

static inline uint8_t NVReadVgaCrtc5758(struct drm_device *dev, int head, uint8_t index)
{
NVWriteVgaCrtc(dev, head, NV_CIO_CRE_57, index);
return NVReadVgaCrtc(dev, head, NV_CIO_CRE_58);
}

static inline uint8_t NVReadPRMVIO(struct drm_device *dev,
int head, uint32_t reg)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint8_t val;

/* Only NV4x have two pvio ranges; other twoHeads cards MUST call
* NVSetOwner for the relevant head to be programmed */
if (head && dev_priv->card_type == NV_40)
reg += NV_PRMVIO_SIZE;

val = nv_rd08(dev, reg);
NV_REG_DEBUG(RMVIO, dev, "head %d reg %08x val %02x\n", head, reg, val);
return val;
}

static inline void NVWritePRMVIO(struct drm_device *dev,
int head, uint32_t reg, uint8_t value)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;

/* Only NV4x have two pvio ranges; other twoHeads cards MUST call
* NVSetOwner for the relevant head to be programmed */
if (head && dev_priv->card_type == NV_40)
reg += NV_PRMVIO_SIZE;

NV_REG_DEBUG(RMVIO, dev, "head %d reg %08x val %02x\n",
head, reg, value);
nv_wr08(dev, reg, value);
}

static inline void NVSetEnablePalette(struct drm_device *dev, int head, bool enable)
{
nv_rd08(dev, NV_PRMCIO_INP0__COLOR + head * NV_PRMCIO_SIZE);
nv_wr08(dev, NV_PRMCIO_ARX + head * NV_PRMCIO_SIZE, enable ? 0 : 0x20);
}

static inline bool NVGetEnablePalette(struct drm_device *dev, int head)
{
nv_rd08(dev, NV_PRMCIO_INP0__COLOR + head * NV_PRMCIO_SIZE);
return !(nv_rd08(dev, NV_PRMCIO_ARX + head * NV_PRMCIO_SIZE) & 0x20);
}

static inline void NVWriteVgaAttr(struct drm_device *dev,
int head, uint8_t index, uint8_t value)
{
if (NVGetEnablePalette(dev, head))
index &= ~0x20;
else
index |= 0x20;

nv_rd08(dev, NV_PRMCIO_INP0__COLOR + head * NV_PRMCIO_SIZE);
NV_REG_DEBUG(VGAATTR, dev, "head %d index 0x%02x data 0x%02x\n",
head, index, value);
nv_wr08(dev, NV_PRMCIO_ARX + head * NV_PRMCIO_SIZE, index);
nv_wr08(dev, NV_PRMCIO_AR__WRITE + head * NV_PRMCIO_SIZE, value);
}

static inline uint8_t NVReadVgaAttr(struct drm_device *dev,
int head, uint8_t index)
{
uint8_t val;
if (NVGetEnablePalette(dev, head))
index &= ~0x20;
else
index |= 0x20;

nv_rd08(dev, NV_PRMCIO_INP0__COLOR + head * NV_PRMCIO_SIZE);
nv_wr08(dev, NV_PRMCIO_ARX + head * NV_PRMCIO_SIZE, index);
val = nv_rd08(dev, NV_PRMCIO_AR__READ + head * NV_PRMCIO_SIZE);
NV_REG_DEBUG(VGAATTR, dev, "head %d index 0x%02x data 0x%02x\n",
head, index, val);
return val;
}

static inline void NVVgaSeqReset(struct drm_device *dev, int head, bool start)
{
NVWriteVgaSeq(dev, head, NV_VIO_SR_RESET_INDEX, start ? 0x1 : 0x3);
}

static inline void NVVgaProtect(struct drm_device *dev, int head, bool protect)
{
uint8_t seq1 = NVReadVgaSeq(dev, head, NV_VIO_SR_CLOCK_INDEX);

if (protect) {
NVVgaSeqReset(dev, head, true);
NVWriteVgaSeq(dev, head, NV_VIO_SR_CLOCK_INDEX, seq1 | 0x20);
} else {
/* Reenable sequencer, then turn on screen */
NVWriteVgaSeq(dev, head, NV_VIO_SR_CLOCK_INDEX, seq1 & ~0x20); /* reenable display */
NVVgaSeqReset(dev, head, false);
}
NVSetEnablePalette(dev, head, protect);
}

static inline bool
nv_heads_tied(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;

if (dev_priv->chipset == 0x11)
return !!(nvReadMC(dev, NV_PBUS_DEBUG_1) & (1 << 28));

return NVReadVgaCrtc(dev, 0, NV_CIO_CRE_44) & 0x4;
}

/* makes cr0-7 on the specified head read-only */
static inline bool
nv_lock_vga_crtc_base(struct drm_device *dev, int head, bool lock)
{
uint8_t cr11 = NVReadVgaCrtc(dev, head, NV_CIO_CR_VRE_INDEX);
bool waslocked = cr11 & 0x80;

if (lock)
cr11 |= 0x80;
else
cr11 &= ~0x80;
NVWriteVgaCrtc(dev, head, NV_CIO_CR_VRE_INDEX, cr11);

return waslocked;
}

static inline void
nv_lock_vga_crtc_shadow(struct drm_device *dev, int head, int lock)
{
/* shadow lock: connects 0x60?3d? regs to "real" 0x3d? regs
* bit7: unlocks HDT, HBS, HBE, HRS, HRE, HEB
* bit6: seems to have some effect on CR09 (double scan, VBS_9)
* bit5: unlocks HDE
* bit4: unlocks VDE
* bit3: unlocks VDT, OVL, VRS, ?VRE?, VBS, VBE, LSR, EBR
* bit2: same as bit 1 of 0x60?804
* bit0: same as bit 0 of 0x60?804
*/

uint8_t cr21 = lock;

if (lock < 0)
/* 0xfa is generic "unlock all" mask */
cr21 = NVReadVgaCrtc(dev, head, NV_CIO_CRE_21) | 0xfa;

NVWriteVgaCrtc(dev, head, NV_CIO_CRE_21, cr21);
}

/* renders the extended crtc regs (cr19+) on all crtcs impervious:
* immutable and unreadable
*/
static inline bool
NVLockVgaCrtcs(struct drm_device *dev, bool lock)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
bool waslocked = !NVReadVgaCrtc(dev, 0, NV_CIO_SR_LOCK_INDEX);

NVWriteVgaCrtc(dev, 0, NV_CIO_SR_LOCK_INDEX,
lock ? NV_CIO_SR_LOCK_VALUE : NV_CIO_SR_UNLOCK_RW_VALUE);
/* NV11 has independently lockable extended crtcs, except when tied */
if (dev_priv->chipset == 0x11 && !nv_heads_tied(dev))
NVWriteVgaCrtc(dev, 1, NV_CIO_SR_LOCK_INDEX,
lock ? NV_CIO_SR_LOCK_VALUE :
NV_CIO_SR_UNLOCK_RW_VALUE);

return waslocked;
}

/* nv04 cursor max dimensions of 32x32 (A1R5G5B5) */
#define NV04_CURSOR_SIZE 32
/* limit nv10 cursors to 64x64 (ARGB8) (we could go to 64x255) */
#define NV10_CURSOR_SIZE 64

static inline int nv_cursor_width(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;

return dev_priv->card_type >= NV_10 ? NV10_CURSOR_SIZE : NV04_CURSOR_SIZE;
}

static inline void
nv_fix_nv40_hw_cursor(struct drm_device *dev, int head)
{
/* on some nv40 (such as the "true" (in the NV_PFB_BOOT_0 sense) nv40,
* the gf6800gt) a hardware bug requires a write to PRAMDAC_CURSOR_POS
* for changes to the CRTC CURCTL regs to take effect, whether changing
* the pixmap location, or just showing/hiding the cursor
*/
uint32_t curpos = NVReadRAMDAC(dev, head, NV_PRAMDAC_CU_START_POS);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_CU_START_POS, curpos);
}

static inline void
nv_show_cursor(struct drm_device *dev, int head, bool show)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint8_t *curctl1 =
&dev_priv->mode_reg.crtc_reg[head].CRTC[NV_CIO_CRE_HCUR_ADDR1_INDEX];

if (show)
*curctl1 |= MASK(NV_CIO_CRE_HCUR_ADDR1_ENABLE);
else
*curctl1 &= ~MASK(NV_CIO_CRE_HCUR_ADDR1_ENABLE);
NVWriteVgaCrtc(dev, head, NV_CIO_CRE_HCUR_ADDR1_INDEX, *curctl1);

if (dev_priv->card_type == NV_40)
nv_fix_nv40_hw_cursor(dev, head);
}

static inline uint32_t
nv_pitch_align(struct drm_device *dev, uint32_t width, int bpp)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
int mask;

if (bpp == 15)
bpp = 16;
if (bpp == 24)
bpp = 8;

/* Alignment requirements taken from the Haiku driver */
if (dev_priv->card_type == NV_04)
mask = 128 / bpp - 1;
else
mask = 512 / bpp - 1;

return (width + mask) & ~mask;
}

#endif /* __NOUVEAU_HW_H__ */
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