diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c new file mode 100644 index 0000000..b7fd115 --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c @@ -0,0 +1,359 @@ +/* + * 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, + }, +}; |