drm/nouveau/clock: pull in the implementation from all over the place

Still missing the main bits we use to change performance levels, I'll get
to it after all the hard yakka has been finished.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 295 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c b/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c
index 3a3b3b1..b7fd115 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/nv04.c
@@ -23,17 +23,309 @@
  */
 
 #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);
+}
 
-	nv_warn(priv, "0x%08x/%dKhz unimplemented\n", type, freq);
+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
@@ -50,6 +342,8 @@ nv04_clock_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 		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;
 }