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* Copyright 2012 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
*/
#include <subdev/clock.h>
#include <subdev/bios.h>
#include <subdev/bios/pll.h>
#include "pll.h"
struct nv04_clock_priv {
struct nouveau_clock base;
};
static int
powerctrl_1_shift(int chip_version, int reg)
{
int shift = -4;
if (chip_version < 0x17 || chip_version == 0x1a || chip_version == 0x20)
return shift;
switch (reg) {
case 0x680520:
shift += 4;
case 0x680508:
shift += 4;
case 0x680504:
shift += 4;
case 0x680500:
shift += 4;
}
/*
* the shift for vpll regs is only used for nv3x chips with a single
* stage pll
*/
if (shift > 4 && (chip_version < 0x32 || chip_version == 0x35 ||
chip_version == 0x36 || chip_version >= 0x40))
shift = -4;
return shift;
}
static void
setPLL_single(struct nv04_clock_priv *priv, u32 reg,
struct nouveau_pll_vals *pv)
{
int chip_version = nouveau_bios(priv)->version.chip;
uint32_t oldpll = nv_rd32(priv, reg);
int oldN = (oldpll >> 8) & 0xff, oldM = oldpll & 0xff;
uint32_t pll = (oldpll & 0xfff80000) | pv->log2P << 16 | pv->NM1;
uint32_t saved_powerctrl_1 = 0;
int shift_powerctrl_1 = powerctrl_1_shift(chip_version, reg);
if (oldpll == pll)
return; /* already set */
if (shift_powerctrl_1 >= 0) {
saved_powerctrl_1 = nv_rd32(priv, 0x001584);
nv_wr32(priv, 0x001584,
(saved_powerctrl_1 & ~(0xf << shift_powerctrl_1)) |
1 << shift_powerctrl_1);
}
if (oldM && pv->M1 && (oldN / oldM < pv->N1 / pv->M1))
/* upclock -- write new post divider first */
nv_wr32(priv, reg, pv->log2P << 16 | (oldpll & 0xffff));
else
/* downclock -- write new NM first */
nv_wr32(priv, reg, (oldpll & 0xffff0000) | pv->NM1);
if (chip_version < 0x17 && chip_version != 0x11)
/* wait a bit on older chips */
msleep(64);
nv_rd32(priv, reg);
/* then write the other half as well */
nv_wr32(priv, reg, pll);
if (shift_powerctrl_1 >= 0)
nv_wr32(priv, 0x001584, saved_powerctrl_1);
}
static uint32_t
new_ramdac580(uint32_t reg1, bool ss, uint32_t ramdac580)
{
bool head_a = (reg1 == 0x680508);
if (ss) /* single stage pll mode */
ramdac580 |= head_a ? 0x00000100 : 0x10000000;
else
ramdac580 &= head_a ? 0xfffffeff : 0xefffffff;
return ramdac580;
}
static void
setPLL_double_highregs(struct nv04_clock_priv *priv, u32 reg1,
struct nouveau_pll_vals *pv)
{
int chip_version = nouveau_bios(priv)->version.chip;
bool nv3035 = chip_version == 0x30 || chip_version == 0x35;
uint32_t reg2 = reg1 + ((reg1 == 0x680520) ? 0x5c : 0x70);
uint32_t oldpll1 = nv_rd32(priv, reg1);
uint32_t oldpll2 = !nv3035 ? nv_rd32(priv, reg2) : 0;
uint32_t pll1 = (oldpll1 & 0xfff80000) | pv->log2P << 16 | pv->NM1;
uint32_t pll2 = (oldpll2 & 0x7fff0000) | 1 << 31 | pv->NM2;
uint32_t oldramdac580 = 0, ramdac580 = 0;
bool single_stage = !pv->NM2 || pv->N2 == pv->M2; /* nv41+ only */
uint32_t saved_powerctrl_1 = 0, savedc040 = 0;
int shift_powerctrl_1 = powerctrl_1_shift(chip_version, reg1);
/* model specific additions to generic pll1 and pll2 set up above */
if (nv3035) {
pll1 = (pll1 & 0xfcc7ffff) | (pv->N2 & 0x18) << 21 |
(pv->N2 & 0x7) << 19 | 8 << 4 | (pv->M2 & 7) << 4;
pll2 = 0;
}
if (chip_version > 0x40 && reg1 >= 0x680508) { /* !nv40 */
oldramdac580 = nv_rd32(priv, 0x680580);
ramdac580 = new_ramdac580(reg1, single_stage, oldramdac580);
if (oldramdac580 != ramdac580)
oldpll1 = ~0; /* force mismatch */
if (single_stage)
/* magic value used by nvidia in single stage mode */
pll2 |= 0x011f;
}
if (chip_version > 0x70)
/* magic bits set by the blob (but not the bios) on g71-73 */
pll1 = (pll1 & 0x7fffffff) | (single_stage ? 0x4 : 0xc) << 28;
if (oldpll1 == pll1 && oldpll2 == pll2)
return; /* already set */
if (shift_powerctrl_1 >= 0) {
saved_powerctrl_1 = nv_rd32(priv, 0x001584);
nv_wr32(priv, 0x001584,
(saved_powerctrl_1 & ~(0xf << shift_powerctrl_1)) |
1 << shift_powerctrl_1);
}
if (chip_version >= 0x40) {
int shift_c040 = 14;
switch (reg1) {
case 0x680504:
shift_c040 += 2;
case 0x680500:
shift_c040 += 2;
case 0x680520:
shift_c040 += 2;
case 0x680508:
shift_c040 += 2;
}
savedc040 = nv_rd32(priv, 0xc040);
if (shift_c040 != 14)
nv_wr32(priv, 0xc040, savedc040 & ~(3 << shift_c040));
}
if (oldramdac580 != ramdac580)
nv_wr32(priv, 0x680580, ramdac580);
if (!nv3035)
nv_wr32(priv, reg2, pll2);
nv_wr32(priv, reg1, pll1);
if (shift_powerctrl_1 >= 0)
nv_wr32(priv, 0x001584, saved_powerctrl_1);
if (chip_version >= 0x40)
nv_wr32(priv, 0xc040, savedc040);
}
static void
setPLL_double_lowregs(struct nv04_clock_priv *priv, u32 NMNMreg,
struct nouveau_pll_vals *pv)
{
/* When setting PLLs, there is a merry game of disabling and enabling
* various bits of hardware during the process. This function is a
* synthesis of six nv4x traces, nearly each card doing a subtly
* different thing. With luck all the necessary bits for each card are
* combined herein. Without luck it deviates from each card's formula
* so as to not work on any :)
*/
uint32_t Preg = NMNMreg - 4;
bool mpll = Preg == 0x4020;
uint32_t oldPval = nv_rd32(priv, Preg);
uint32_t NMNM = pv->NM2 << 16 | pv->NM1;
uint32_t Pval = (oldPval & (mpll ? ~(0x77 << 16) : ~(7 << 16))) |
0xc << 28 | pv->log2P << 16;
uint32_t saved4600 = 0;
/* some cards have different maskc040s */
uint32_t maskc040 = ~(3 << 14), savedc040;
bool single_stage = !pv->NM2 || pv->N2 == pv->M2;
if (nv_rd32(priv, NMNMreg) == NMNM && (oldPval & 0xc0070000) == Pval)
return;
if (Preg == 0x4000)
maskc040 = ~0x333;
if (Preg == 0x4058)
maskc040 = ~(0xc << 24);
if (mpll) {
struct nvbios_pll info;
uint8_t Pval2;
if (nvbios_pll_parse(nouveau_bios(priv), Preg, &info))
return;
Pval2 = pv->log2P + info.bias_p;
if (Pval2 > info.max_p)
Pval2 = info.max_p;
Pval |= 1 << 28 | Pval2 << 20;
saved4600 = nv_rd32(priv, 0x4600);
nv_wr32(priv, 0x4600, saved4600 | 8 << 28);
}
if (single_stage)
Pval |= mpll ? 1 << 12 : 1 << 8;
nv_wr32(priv, Preg, oldPval | 1 << 28);
nv_wr32(priv, Preg, Pval & ~(4 << 28));
if (mpll) {
Pval |= 8 << 20;
nv_wr32(priv, 0x4020, Pval & ~(0xc << 28));
nv_wr32(priv, 0x4038, Pval & ~(0xc << 28));
}
savedc040 = nv_rd32(priv, 0xc040);
nv_wr32(priv, 0xc040, savedc040 & maskc040);
nv_wr32(priv, NMNMreg, NMNM);
if (NMNMreg == 0x4024)
nv_wr32(priv, 0x403c, NMNM);
nv_wr32(priv, Preg, Pval);
if (mpll) {
Pval &= ~(8 << 20);
nv_wr32(priv, 0x4020, Pval);
nv_wr32(priv, 0x4038, Pval);
nv_wr32(priv, 0x4600, saved4600);
}
nv_wr32(priv, 0xc040, savedc040);
if (mpll) {
nv_wr32(priv, 0x4020, Pval & ~(1 << 28));
nv_wr32(priv, 0x4038, Pval & ~(1 << 28));
}
}
int
nv04_clock_pll_set(struct nouveau_clock *clk, u32 type, u32 freq)
{
struct nv04_clock_priv *priv = (void *)clk;
struct nouveau_pll_vals pv;
struct nvbios_pll info;
int ret;
ret = nvbios_pll_parse(nouveau_bios(priv), type > 0x405c ?
type : type - 4, &info);
if (ret)
return ret;
ret = clk->pll_calc(clk, &info, freq, &pv);
if (!ret)
return ret;
return clk->pll_prog(clk, type, &pv);
}
int
nv04_clock_pll_calc(struct nouveau_clock *clock, struct nvbios_pll *info,
int clk, struct nouveau_pll_vals *pv)
{
int N1, M1, N2, M2, P;
int ret = nv04_pll_calc(clock, info, clk, &N1, &M1, &N2, &M2, &P);
if (ret) {
pv->refclk = info->refclk;
pv->N1 = N1;
pv->M1 = M1;
pv->N2 = N2;
pv->M2 = M2;
pv->log2P = P;
}
return ret;
}
int
nv04_clock_pll_prog(struct nouveau_clock *clk, u32 reg1,
struct nouveau_pll_vals *pv)
{
struct nv04_clock_priv *priv = (void *)clk;
int cv = nouveau_bios(clk)->version.chip;
if (cv == 0x30 || cv == 0x31 || cv == 0x35 || cv == 0x36 ||
cv >= 0x40) {
if (reg1 > 0x405c)
setPLL_double_highregs(priv, reg1, pv);
else
setPLL_double_lowregs(priv, reg1, pv);
} else
setPLL_single(priv, reg1, pv);
return 0;
}
static int
nv04_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
struct nouveau_oclass *oclass, void *data, u32 size,
struct nouveau_object **pobject)
{
struct nv04_clock_priv *priv;
int ret;
ret = nouveau_clock_create(parent, engine, oclass, &priv);
*pobject = nv_object(priv);
if (ret)
return ret;
priv->base.pll_set = nv04_clock_pll_set;
priv->base.pll_calc = nv04_clock_pll_calc;
priv->base.pll_prog = nv04_clock_pll_prog;
return 0;
}
struct nouveau_oclass
nv04_clock_oclass = {
.handle = NV_SUBDEV(CLOCK, 0x04),
.ofuncs = &(struct nouveau_ofuncs) {
.ctor = nv04_clock_ctor,
.dtor = _nouveau_clock_dtor,
.init = _nouveau_clock_init,
.fini = _nouveau_clock_fini,
},
};
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