[deliverable/linux.git] / drivers / gpu / drm / nouveau / nvkm / subdev / clk / gf100.c

/*
 * 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/clk.h>
#include "pll.h"

#include <subdev/bios.h>
#include <subdev/bios/pll.h>
#include <subdev/timer.h>

struct gf100_clk_info {
	u32 freq;
	u32 ssel;
	u32 mdiv;
	u32 dsrc;
	u32 ddiv;
	u32 coef;
};

struct gf100_clk {
	struct nvkm_clk base;
	struct gf100_clk_info eng[16];
};

static u32 read_div(struct gf100_clk *, int, u32, u32);

static u32
read_vco(struct gf100_clk *clk, u32 dsrc)
{
	struct nvkm_device *device = clk->base.subdev.device;
	u32 ssrc = nvkm_rd32(device, dsrc);
	if (!(ssrc & 0x00000100))
		return clk->base.read(&clk->base, nv_clk_src_sppll0);
	return clk->base.read(&clk->base, nv_clk_src_sppll1);
}

static u32
read_pll(struct gf100_clk *clk, u32 pll)
{
	struct nvkm_device *device = clk->base.subdev.device;
	u32 ctrl = nvkm_rd32(device, pll + 0x00);
	u32 coef = nvkm_rd32(device, pll + 0x04);
	u32 P = (coef & 0x003f0000) >> 16;
	u32 N = (coef & 0x0000ff00) >> 8;
	u32 M = (coef & 0x000000ff) >> 0;
	u32 sclk;

	if (!(ctrl & 0x00000001))
		return 0;

	switch (pll) {
	case 0x00e800:
	case 0x00e820:
		sclk = device->crystal;
		P = 1;
		break;
	case 0x132000:
		sclk = clk->base.read(&clk->base, nv_clk_src_mpllsrc);
		break;
	case 0x132020:
		sclk = clk->base.read(&clk->base, nv_clk_src_mpllsrcref);
		break;
	case 0x137000:
	case 0x137020:
	case 0x137040:
	case 0x1370e0:
		sclk = read_div(clk, (pll & 0xff) / 0x20, 0x137120, 0x137140);
		break;
	default:
		return 0;
	}

	return sclk * N / M / P;
}

static u32
read_div(struct gf100_clk *clk, int doff, u32 dsrc, u32 dctl)
{
	struct nvkm_device *device = clk->base.subdev.device;
	u32 ssrc = nvkm_rd32(device, dsrc + (doff * 4));
	u32 sctl = nvkm_rd32(device, dctl + (doff * 4));

	switch (ssrc & 0x00000003) {
	case 0:
		if ((ssrc & 0x00030000) != 0x00030000)
			return device->crystal;
		return 108000;
	case 2:
		return 100000;
	case 3:
		if (sctl & 0x80000000) {
			u32 sclk = read_vco(clk, dsrc + (doff * 4));
			u32 sdiv = (sctl & 0x0000003f) + 2;
			return (sclk * 2) / sdiv;
		}

		return read_vco(clk, dsrc + (doff * 4));
	default:
		return 0;
	}
}

static u32
read_clk(struct gf100_clk *clk, int idx)
{
	struct nvkm_device *device = clk->base.subdev.device;
	u32 sctl = nvkm_rd32(device, 0x137250 + (idx * 4));
	u32 ssel = nvkm_rd32(device, 0x137100);
	u32 sclk, sdiv;

	if (ssel & (1 << idx)) {
		if (idx < 7)
			sclk = read_pll(clk, 0x137000 + (idx * 0x20));
		else
			sclk = read_pll(clk, 0x1370e0);
		sdiv = ((sctl & 0x00003f00) >> 8) + 2;
	} else {
		sclk = read_div(clk, idx, 0x137160, 0x1371d0);
		sdiv = ((sctl & 0x0000003f) >> 0) + 2;
	}

	if (sctl & 0x80000000)
		return (sclk * 2) / sdiv;

	return sclk;
}

static int
gf100_clk_read(struct nvkm_clk *obj, enum nv_clk_src src)
{
	struct gf100_clk *clk = container_of(obj, typeof(*clk), base);
	struct nvkm_device *device = clk->base.subdev.device;

	switch (src) {
	case nv_clk_src_crystal:
		return device->crystal;
	case nv_clk_src_href:
		return 100000;
	case nv_clk_src_sppll0:
		return read_pll(clk, 0x00e800);
	case nv_clk_src_sppll1:
		return read_pll(clk, 0x00e820);

	case nv_clk_src_mpllsrcref:
		return read_div(clk, 0, 0x137320, 0x137330);
	case nv_clk_src_mpllsrc:
		return read_pll(clk, 0x132020);
	case nv_clk_src_mpll:
		return read_pll(clk, 0x132000);
	case nv_clk_src_mdiv:
		return read_div(clk, 0, 0x137300, 0x137310);
	case nv_clk_src_mem:
		if (nvkm_rd32(device, 0x1373f0) & 0x00000002)
			return clk->base.read(&clk->base, nv_clk_src_mpll);
		return clk->base.read(&clk->base, nv_clk_src_mdiv);

	case nv_clk_src_gpc:
		return read_clk(clk, 0x00);
	case nv_clk_src_rop:
		return read_clk(clk, 0x01);
	case nv_clk_src_hubk07:
		return read_clk(clk, 0x02);
	case nv_clk_src_hubk06:
		return read_clk(clk, 0x07);
	case nv_clk_src_hubk01:
		return read_clk(clk, 0x08);
	case nv_clk_src_copy:
		return read_clk(clk, 0x09);
	case nv_clk_src_daemon:
		return read_clk(clk, 0x0c);
	case nv_clk_src_vdec:
		return read_clk(clk, 0x0e);
	default:
		nv_error(clk, "invalid clock source %d\n", src);
		return -EINVAL;
	}
}

static u32
calc_div(struct gf100_clk *clk, int idx, u32 ref, u32 freq, u32 *ddiv)
{
	u32 div = min((ref * 2) / freq, (u32)65);
	if (div < 2)
		div = 2;

	*ddiv = div - 2;
	return (ref * 2) / div;
}

static u32
calc_src(struct gf100_clk *clk, int idx, u32 freq, u32 *dsrc, u32 *ddiv)
{
	u32 sclk;

	/* use one of the fixed frequencies if possible */
	*ddiv = 0x00000000;
	switch (freq) {
	case  27000:
	case 108000:
		*dsrc = 0x00000000;
		if (freq == 108000)
			*dsrc |= 0x00030000;
		return freq;
	case 100000:
		*dsrc = 0x00000002;
		return freq;
	default:
		*dsrc = 0x00000003;
		break;
	}

	/* otherwise, calculate the closest divider */
	sclk = read_vco(clk, 0x137160 + (idx * 4));
	if (idx < 7)
		sclk = calc_div(clk, idx, sclk, freq, ddiv);
	return sclk;
}

static u32
calc_pll(struct gf100_clk *clk, int idx, u32 freq, u32 *coef)
{
	struct nvkm_bios *bios = nvkm_bios(clk);
	struct nvbios_pll limits;
	int N, M, P, ret;

	ret = nvbios_pll_parse(bios, 0x137000 + (idx * 0x20), &limits);
	if (ret)
		return 0;

	limits.refclk = read_div(clk, idx, 0x137120, 0x137140);
	if (!limits.refclk)
		return 0;

	ret = gt215_pll_calc(nv_subdev(clk), &limits, freq, &N, NULL, &M, &P);
	if (ret <= 0)
		return 0;

	*coef = (P << 16) | (N << 8) | M;
	return ret;
}

static int
calc_clk(struct gf100_clk *clk, struct nvkm_cstate *cstate, int idx, int dom)
{
	struct gf100_clk_info *info = &clk->eng[idx];
	u32 freq = cstate->domain[dom];
	u32 src0, div0, div1D, div1P = 0;
	u32 clk0, clk1 = 0;

	/* invalid clock domain */
	if (!freq)
		return 0;

	/* first possible path, using only dividers */
	clk0 = calc_src(clk, idx, freq, &src0, &div0);
	clk0 = calc_div(clk, idx, clk0, freq, &div1D);

	/* see if we can get any closer using PLLs */
	if (clk0 != freq && (0x00004387 & (1 << idx))) {
		if (idx <= 7)
			clk1 = calc_pll(clk, idx, freq, &info->coef);
		else
			clk1 = cstate->domain[nv_clk_src_hubk06];
		clk1 = calc_div(clk, idx, clk1, freq, &div1P);
	}

	/* select the method which gets closest to target freq */
	if (abs((int)freq - clk0) <= abs((int)freq - clk1)) {
		info->dsrc = src0;
		if (div0) {
			info->ddiv |= 0x80000000;
			info->ddiv |= div0 << 8;
			info->ddiv |= div0;
		}
		if (div1D) {
			info->mdiv |= 0x80000000;
			info->mdiv |= div1D;
		}
		info->ssel = info->coef = 0;
		info->freq = clk0;
	} else {
		if (div1P) {
			info->mdiv |= 0x80000000;
			info->mdiv |= div1P << 8;
		}
		info->ssel = (1 << idx);
		info->freq = clk1;
	}

	return 0;
}

static int
gf100_clk_calc(struct nvkm_clk *obj, struct nvkm_cstate *cstate)
{
	struct gf100_clk *clk = container_of(obj, typeof(*clk), base);
	int ret;

	if ((ret = calc_clk(clk, cstate, 0x00, nv_clk_src_gpc)) ||
	    (ret = calc_clk(clk, cstate, 0x01, nv_clk_src_rop)) ||
	    (ret = calc_clk(clk, cstate, 0x02, nv_clk_src_hubk07)) ||
	    (ret = calc_clk(clk, cstate, 0x07, nv_clk_src_hubk06)) ||
	    (ret = calc_clk(clk, cstate, 0x08, nv_clk_src_hubk01)) ||
	    (ret = calc_clk(clk, cstate, 0x09, nv_clk_src_copy)) ||
	    (ret = calc_clk(clk, cstate, 0x0c, nv_clk_src_daemon)) ||
	    (ret = calc_clk(clk, cstate, 0x0e, nv_clk_src_vdec)))
		return ret;

	return 0;
}

static void
gf100_clk_prog_0(struct gf100_clk *clk, int idx)
{
	struct gf100_clk_info *info = &clk->eng[idx];
	struct nvkm_device *device = clk->base.subdev.device;
	if (idx < 7 && !info->ssel) {
		nvkm_mask(device, 0x1371d0 + (idx * 0x04), 0x80003f3f, info->ddiv);
		nvkm_wr32(device, 0x137160 + (idx * 0x04), info->dsrc);
	}
}

static void
gf100_clk_prog_1(struct gf100_clk *clk, int idx)
{
	struct nvkm_device *device = clk->base.subdev.device;
	nvkm_mask(device, 0x137100, (1 << idx), 0x00000000);
	nvkm_msec(device, 2000,
		if (!(nvkm_rd32(device, 0x137100) & (1 << idx)))
			break;
	);
}

static void
gf100_clk_prog_2(struct gf100_clk *clk, int idx)
{
	struct gf100_clk_info *info = &clk->eng[idx];
	struct nvkm_device *device = clk->base.subdev.device;
	const u32 addr = 0x137000 + (idx * 0x20);
	if (idx <= 7) {
		nvkm_mask(device, addr + 0x00, 0x00000004, 0x00000000);
		nvkm_mask(device, addr + 0x00, 0x00000001, 0x00000000);
		if (info->coef) {
			nvkm_wr32(device, addr + 0x04, info->coef);
			nvkm_mask(device, addr + 0x00, 0x00000001, 0x00000001);
			nvkm_msec(device, 2000,
				if (nvkm_rd32(device, addr + 0x00) & 0x00020000)
					break;
			);
			nvkm_mask(device, addr + 0x00, 0x00020004, 0x00000004);
		}
	}
}

static void
gf100_clk_prog_3(struct gf100_clk *clk, int idx)
{
	struct gf100_clk_info *info = &clk->eng[idx];
	struct nvkm_device *device = clk->base.subdev.device;
	if (info->ssel) {
		nvkm_mask(device, 0x137100, (1 << idx), info->ssel);
		nvkm_msec(device, 2000,
			u32 tmp = nvkm_rd32(device, 0x137100) & (1 << idx);
			if (tmp == info->ssel)
				break;
		);
	}
}

static void
gf100_clk_prog_4(struct gf100_clk *clk, int idx)
{
	struct gf100_clk_info *info = &clk->eng[idx];
	struct nvkm_device *device = clk->base.subdev.device;
	nvkm_mask(device, 0x137250 + (idx * 0x04), 0x00003f3f, info->mdiv);
}

static int
gf100_clk_prog(struct nvkm_clk *obj)
{
	struct gf100_clk *clk = container_of(obj, typeof(*clk), base);
	struct {
		void (*exec)(struct gf100_clk *, int);
	} stage[] = {
		{ gf100_clk_prog_0 }, /* div programming */
		{ gf100_clk_prog_1 }, /* select div mode */
		{ gf100_clk_prog_2 }, /* (maybe) program pll */
		{ gf100_clk_prog_3 }, /* (maybe) select pll mode */
		{ gf100_clk_prog_4 }, /* final divider */
	};
	int i, j;

	for (i = 0; i < ARRAY_SIZE(stage); i++) {
		for (j = 0; j < ARRAY_SIZE(clk->eng); j++) {
			if (!clk->eng[j].freq)
				continue;
			stage[i].exec(clk, j);
		}
	}

	return 0;
}

static void
gf100_clk_tidy(struct nvkm_clk *obj)
{
	struct gf100_clk *clk = container_of(obj, typeof(*clk), base);
	memset(clk->eng, 0x00, sizeof(clk->eng));
}

static struct nvkm_domain
gf100_domain[] = {
	{ nv_clk_src_crystal, 0xff },
	{ nv_clk_src_href   , 0xff },
	{ nv_clk_src_hubk06 , 0x00 },
	{ nv_clk_src_hubk01 , 0x01 },
	{ nv_clk_src_copy   , 0x02 },
	{ nv_clk_src_gpc    , 0x03, 0, "core", 2000 },
	{ nv_clk_src_rop    , 0x04 },
	{ nv_clk_src_mem    , 0x05, 0, "memory", 1000 },
	{ nv_clk_src_vdec   , 0x06 },
	{ nv_clk_src_daemon , 0x0a },
	{ nv_clk_src_hubk07 , 0x0b },
	{ nv_clk_src_max }
};

static int
gf100_clk_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
	       struct nvkm_oclass *oclass, void *data, u32 size,
	       struct nvkm_object **pobject)
{
	struct gf100_clk *clk;
	int ret;

	ret = nvkm_clk_create(parent, engine, oclass, gf100_domain,
			      NULL, 0, false, &clk);
	*pobject = nv_object(clk);
	if (ret)
		return ret;

	clk->base.read = gf100_clk_read;
	clk->base.calc = gf100_clk_calc;
	clk->base.prog = gf100_clk_prog;
	clk->base.tidy = gf100_clk_tidy;
	return 0;
}

struct nvkm_oclass
gf100_clk_oclass = {
	.handle = NV_SUBDEV(CLK, 0xc0),
	.ofuncs = &(struct nvkm_ofuncs) {
		.ctor = gf100_clk_ctor,
		.dtor = _nvkm_clk_dtor,
		.init = _nvkm_clk_init,
		.fini = _nvkm_clk_fini,
	},
};
Commit	Line	Data
8aceb7de BS	1	/*
	2	* Copyright 2012 Red Hat Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	* Authors: Ben Skeggs
	23	*/
f3867f43	24	#include <subdev/clk.h>
7632b30e BS	25	#include "pll.h"
7632b30e BS	26
70790f4f BS	27	#include <subdev/bios.h>
70790f4f BS	28	#include <subdev/bios/pll.h>
7c856522	29	#include <subdev/timer.h>
70790f4f	30
7632b30e	31	struct gf100_clk_info {
7c856522 BS	32	u32 freq;
	33	u32 ssel;
	34	u32 mdiv;
	35	u32 dsrc;
	36	u32 ddiv;
	37	u32 coef;
	38	};
	39
3eca809b	40	struct gf100_clk {
7632b30e BS	41	struct nvkm_clk base;
7632b30e BS	42	struct gf100_clk_info eng[16];
7c856522 BS	43	};
7c856522 BS	44
3eca809b	45	static u32 read_div(struct gf100_clk *, int, u32, u32);
7c856522 BS	46
7c856522 BS	47	static u32
3eca809b	48	read_vco(struct gf100_clk *clk, u32 dsrc)
7c856522	49	{
822ad79f BS	50	struct nvkm_device *device = clk->base.subdev.device;
822ad79f BS	51	u32 ssrc = nvkm_rd32(device, dsrc);
7c856522	52	if (!(ssrc & 0x00000100))
3eca809b BS	53	return clk->base.read(&clk->base, nv_clk_src_sppll0);
3eca809b BS	54	return clk->base.read(&clk->base, nv_clk_src_sppll1);
7c856522 BS	55	}
	56
	57	static u32
3eca809b	58	read_pll(struct gf100_clk *clk, u32 pll)
7c856522	59	{
822ad79f BS	60	struct nvkm_device *device = clk->base.subdev.device;
	61	u32 ctrl = nvkm_rd32(device, pll + 0x00);
	62	u32 coef = nvkm_rd32(device, pll + 0x04);
7c856522 BS	63	u32 P = (coef & 0x003f0000) >> 16;
	64	u32 N = (coef & 0x0000ff00) >> 8;
	65	u32 M = (coef & 0x000000ff) >> 0;
	66	u32 sclk;
	67
	68	if (!(ctrl & 0x00000001))
	69	return 0;
	70
	71	switch (pll) {
	72	case 0x00e800:
	73	case 0x00e820:
822ad79f	74	sclk = device->crystal;
7c856522 BS	75	P = 1;
	76	break;
	77	case 0x132000:
3eca809b	78	sclk = clk->base.read(&clk->base, nv_clk_src_mpllsrc);
7c856522 BS	79	break;
7c856522 BS	80	case 0x132020:
3eca809b	81	sclk = clk->base.read(&clk->base, nv_clk_src_mpllsrcref);
7c856522 BS	82	break;
	83	case 0x137000:
	84	case 0x137020:
	85	case 0x137040:
	86	case 0x1370e0:
3eca809b	87	sclk = read_div(clk, (pll & 0xff) / 0x20, 0x137120, 0x137140);
7c856522 BS	88	break;
	89	default:
	90	return 0;
	91	}
	92
	93	return sclk * N / M / P;
	94	}
	95
	96	static u32
3eca809b	97	read_div(struct gf100_clk *clk, int doff, u32 dsrc, u32 dctl)
7c856522	98	{
822ad79f BS	99	struct nvkm_device *device = clk->base.subdev.device;
	100	u32 ssrc = nvkm_rd32(device, dsrc + (doff * 4));
	101	u32 sctl = nvkm_rd32(device, dctl + (doff * 4));
7c856522 BS	102
	103	switch (ssrc & 0x00000003) {
	104	case 0:
	105	if ((ssrc & 0x00030000) != 0x00030000)
822ad79f	106	return device->crystal;
7c856522 BS	107	return 108000;
	108	case 2:
	109	return 100000;
	110	case 3:
	111	if (sctl & 0x80000000) {
3eca809b	112	u32 sclk = read_vco(clk, dsrc + (doff * 4));
7c856522 BS	113	u32 sdiv = (sctl & 0x0000003f) + 2;
	114	return (sclk * 2) / sdiv;
	115	}
	116
3eca809b	117	return read_vco(clk, dsrc + (doff * 4));
7c856522 BS	118	default:
	119	return 0;
	120	}
	121	}
	122
	123	static u32
3eca809b	124	read_clk(struct gf100_clk *clk, int idx)
7c856522	125	{
822ad79f BS	126	struct nvkm_device *device = clk->base.subdev.device;
	127	u32 sctl = nvkm_rd32(device, 0x137250 + (idx * 4));
	128	u32 ssel = nvkm_rd32(device, 0x137100);
7c856522 BS	129	u32 sclk, sdiv;
7c856522 BS	130
3eca809b BS	131	if (ssel & (1 << idx)) {
	132	if (idx < 7)
	133	sclk = read_pll(clk, 0x137000 + (idx * 0x20));
7c856522	134	else
3eca809b	135	sclk = read_pll(clk, 0x1370e0);
7c856522 BS	136	sdiv = ((sctl & 0x00003f00) >> 8) + 2;
7c856522 BS	137	} else {
3eca809b	138	sclk = read_div(clk, idx, 0x137160, 0x1371d0);
7c856522 BS	139	sdiv = ((sctl & 0x0000003f) >> 0) + 2;
	140	}
	141
	142	if (sctl & 0x80000000)
	143	return (sclk * 2) / sdiv;
	144
	145	return sclk;
	146	}
	147
	148	static int
3eca809b	149	gf100_clk_read(struct nvkm_clk *obj, enum nv_clk_src src)
7c856522	150	{
3eca809b	151	struct gf100_clk clk = container_of(obj, typeof(clk), base);
822ad79f	152	struct nvkm_device *device = clk->base.subdev.device;
7c856522 BS	153
	154	switch (src) {
	155	case nv_clk_src_crystal:
	156	return device->crystal;
	157	case nv_clk_src_href:
	158	return 100000;
	159	case nv_clk_src_sppll0:
3eca809b	160	return read_pll(clk, 0x00e800);
7c856522	161	case nv_clk_src_sppll1:
3eca809b	162	return read_pll(clk, 0x00e820);
7c856522 BS	163
7c856522 BS	164	case nv_clk_src_mpllsrcref:
3eca809b	165	return read_div(clk, 0, 0x137320, 0x137330);
7c856522	166	case nv_clk_src_mpllsrc:
3eca809b	167	return read_pll(clk, 0x132020);
7c856522	168	case nv_clk_src_mpll:
3eca809b	169	return read_pll(clk, 0x132000);
7c856522	170	case nv_clk_src_mdiv:
3eca809b	171	return read_div(clk, 0, 0x137300, 0x137310);
7c856522	172	case nv_clk_src_mem:
822ad79f	173	if (nvkm_rd32(device, 0x1373f0) & 0x00000002)
3eca809b BS	174	return clk->base.read(&clk->base, nv_clk_src_mpll);
3eca809b BS	175	return clk->base.read(&clk->base, nv_clk_src_mdiv);
7c856522 BS	176
7c856522 BS	177	case nv_clk_src_gpc:
3eca809b	178	return read_clk(clk, 0x00);
7c856522	179	case nv_clk_src_rop:
3eca809b	180	return read_clk(clk, 0x01);
7c856522	181	case nv_clk_src_hubk07:
3eca809b	182	return read_clk(clk, 0x02);
7c856522	183	case nv_clk_src_hubk06:
3eca809b	184	return read_clk(clk, 0x07);
7c856522	185	case nv_clk_src_hubk01:
3eca809b	186	return read_clk(clk, 0x08);
7c856522	187	case nv_clk_src_copy:
3eca809b	188	return read_clk(clk, 0x09);
7c856522	189	case nv_clk_src_daemon:
3eca809b	190	return read_clk(clk, 0x0c);
7c856522	191	case nv_clk_src_vdec:
3eca809b	192	return read_clk(clk, 0x0e);
7c856522 BS	193	default:
	194	nv_error(clk, "invalid clock source %d\n", src);
	195	return -EINVAL;
	196	}
	197	}
	198
	199	static u32
3eca809b	200	calc_div(struct gf100_clk clk, int idx, u32 ref, u32 freq, u32 ddiv)
7c856522 BS	201	{
	202	u32 div = min((ref * 2) / freq, (u32)65);
	203	if (div < 2)
	204	div = 2;
	205
	206	*ddiv = div - 2;
	207	return (ref * 2) / div;
	208	}
	209
	210	static u32
3eca809b	211	calc_src(struct gf100_clk clk, int idx, u32 freq, u32 dsrc, u32 *ddiv)
7c856522 BS	212	{
	213	u32 sclk;
	214
	215	/* use one of the fixed frequencies if possible */
	216	*ddiv = 0x00000000;
	217	switch (freq) {
	218	case 27000:
	219	case 108000:
	220	*dsrc = 0x00000000;
	221	if (freq == 108000)
	222	*dsrc \|= 0x00030000;
	223	return freq;
	224	case 100000:
	225	*dsrc = 0x00000002;
	226	return freq;
	227	default:
	228	*dsrc = 0x00000003;
	229	break;
	230	}
	231
	232	/* otherwise, calculate the closest divider */
3eca809b BS	233	sclk = read_vco(clk, 0x137160 + (idx * 4));
	234	if (idx < 7)
	235	sclk = calc_div(clk, idx, sclk, freq, ddiv);
7c856522 BS	236	return sclk;
	237	}
	238
	239	static u32
3eca809b	240	calc_pll(struct gf100_clk clk, int idx, u32 freq, u32 coef)
7c856522	241	{
3eca809b	242	struct nvkm_bios *bios = nvkm_bios(clk);
7c856522 BS	243	struct nvbios_pll limits;
	244	int N, M, P, ret;
	245
3eca809b	246	ret = nvbios_pll_parse(bios, 0x137000 + (idx * 0x20), &limits);
7c856522 BS	247	if (ret)
	248	return 0;
	249
3eca809b	250	limits.refclk = read_div(clk, idx, 0x137120, 0x137140);
7c856522 BS	251	if (!limits.refclk)
	252	return 0;
	253
3eca809b	254	ret = gt215_pll_calc(nv_subdev(clk), &limits, freq, &N, NULL, &M, &P);
7c856522 BS	255	if (ret <= 0)
	256	return 0;
	257
	258	*coef = (P << 16) \| (N << 8) \| M;
	259	return ret;
	260	}
	261
	262	static int
3eca809b	263	calc_clk(struct gf100_clk clk, struct nvkm_cstate cstate, int idx, int dom)
7c856522	264	{
3eca809b	265	struct gf100_clk_info *info = &clk->eng[idx];
7c856522 BS	266	u32 freq = cstate->domain[dom];
	267	u32 src0, div0, div1D, div1P = 0;
	268	u32 clk0, clk1 = 0;
	269
	270	/* invalid clock domain */
	271	if (!freq)
	272	return 0;
	273
	274	/* first possible path, using only dividers */
3eca809b BS	275	clk0 = calc_src(clk, idx, freq, &src0, &div0);
3eca809b BS	276	clk0 = calc_div(clk, idx, clk0, freq, &div1D);
7c856522 BS	277
7c856522 BS	278	/* see if we can get any closer using PLLs */
3eca809b BS	279	if (clk0 != freq && (0x00004387 & (1 << idx))) {
	280	if (idx <= 7)
	281	clk1 = calc_pll(clk, idx, freq, &info->coef);
7c856522 BS	282	else
7c856522 BS	283	clk1 = cstate->domain[nv_clk_src_hubk06];
3eca809b	284	clk1 = calc_div(clk, idx, clk1, freq, &div1P);
7c856522 BS	285	}
	286
	287	/* select the method which gets closest to target freq */
	288	if (abs((int)freq - clk0) <= abs((int)freq - clk1)) {
	289	info->dsrc = src0;
	290	if (div0) {
	291	info->ddiv \|= 0x80000000;
	292	info->ddiv \|= div0 << 8;
	293	info->ddiv \|= div0;
	294	}
	295	if (div1D) {
	296	info->mdiv \|= 0x80000000;
	297	info->mdiv \|= div1D;
	298	}
	299	info->ssel = info->coef = 0;
	300	info->freq = clk0;
	301	} else {
	302	if (div1P) {
	303	info->mdiv \|= 0x80000000;
	304	info->mdiv \|= div1P << 8;
	305	}
3eca809b	306	info->ssel = (1 << idx);
7c856522 BS	307	info->freq = clk1;
	308	}
	309
	310	return 0;
	311	}
	312
	313	static int
3eca809b	314	gf100_clk_calc(struct nvkm_clk obj, struct nvkm_cstate cstate)
7c856522	315	{
3eca809b	316	struct gf100_clk clk = container_of(obj, typeof(clk), base);
7c856522 BS	317	int ret;
7c856522 BS	318
3eca809b BS	319	if ((ret = calc_clk(clk, cstate, 0x00, nv_clk_src_gpc)) \|\|
	320	(ret = calc_clk(clk, cstate, 0x01, nv_clk_src_rop)) \|\|
	321	(ret = calc_clk(clk, cstate, 0x02, nv_clk_src_hubk07)) \|\|
	322	(ret = calc_clk(clk, cstate, 0x07, nv_clk_src_hubk06)) \|\|
	323	(ret = calc_clk(clk, cstate, 0x08, nv_clk_src_hubk01)) \|\|
	324	(ret = calc_clk(clk, cstate, 0x09, nv_clk_src_copy)) \|\|
	325	(ret = calc_clk(clk, cstate, 0x0c, nv_clk_src_daemon)) \|\|
	326	(ret = calc_clk(clk, cstate, 0x0e, nv_clk_src_vdec)))
7c856522 BS	327	return ret;
	328
	329	return 0;
	330	}
	331
	332	static void
3eca809b	333	gf100_clk_prog_0(struct gf100_clk *clk, int idx)
7c856522	334	{
3eca809b	335	struct gf100_clk_info *info = &clk->eng[idx];
822ad79f	336	struct nvkm_device *device = clk->base.subdev.device;
3eca809b	337	if (idx < 7 && !info->ssel) {
822ad79f BS	338	nvkm_mask(device, 0x1371d0 + (idx * 0x04), 0x80003f3f, info->ddiv);
822ad79f BS	339	nvkm_wr32(device, 0x137160 + (idx * 0x04), info->dsrc);
7c856522 BS	340	}
	341	}
	342
	343	static void
3eca809b	344	gf100_clk_prog_1(struct gf100_clk *clk, int idx)
7c856522	345	{
822ad79f BS	346	struct nvkm_device *device = clk->base.subdev.device;
822ad79f BS	347	nvkm_mask(device, 0x137100, (1 << idx), 0x00000000);
6979c630 BS	348	nvkm_msec(device, 2000,
	349	if (!(nvkm_rd32(device, 0x137100) & (1 << idx)))
	350	break;
	351	);
7c856522 BS	352	}
	353
	354	static void
3eca809b	355	gf100_clk_prog_2(struct gf100_clk *clk, int idx)
7c856522	356	{
3eca809b	357	struct gf100_clk_info *info = &clk->eng[idx];
822ad79f	358	struct nvkm_device *device = clk->base.subdev.device;
3eca809b BS	359	const u32 addr = 0x137000 + (idx * 0x20);
3eca809b BS	360	if (idx <= 7) {
822ad79f BS	361	nvkm_mask(device, addr + 0x00, 0x00000004, 0x00000000);
822ad79f BS	362	nvkm_mask(device, addr + 0x00, 0x00000001, 0x00000000);
7c856522	363	if (info->coef) {
822ad79f BS	364	nvkm_wr32(device, addr + 0x04, info->coef);
822ad79f BS	365	nvkm_mask(device, addr + 0x00, 0x00000001, 0x00000001);
6979c630 BS	366	nvkm_msec(device, 2000,
	367	if (nvkm_rd32(device, addr + 0x00) & 0x00020000)
	368	break;
	369	);
822ad79f	370	nvkm_mask(device, addr + 0x00, 0x00020004, 0x00000004);
7c856522 BS	371	}
	372	}
	373	}
	374
	375	static void
3eca809b	376	gf100_clk_prog_3(struct gf100_clk *clk, int idx)
7c856522	377	{
3eca809b	378	struct gf100_clk_info *info = &clk->eng[idx];
822ad79f	379	struct nvkm_device *device = clk->base.subdev.device;
7c856522	380	if (info->ssel) {
822ad79f	381	nvkm_mask(device, 0x137100, (1 << idx), info->ssel);
6979c630 BS	382	nvkm_msec(device, 2000,
	383	u32 tmp = nvkm_rd32(device, 0x137100) & (1 << idx);
	384	if (tmp == info->ssel)
	385	break;
	386	);
7c856522 BS	387	}
	388	}
	389
	390	static void
3eca809b	391	gf100_clk_prog_4(struct gf100_clk *clk, int idx)
7c856522	392	{
3eca809b	393	struct gf100_clk_info *info = &clk->eng[idx];
822ad79f BS	394	struct nvkm_device *device = clk->base.subdev.device;
822ad79f BS	395	nvkm_mask(device, 0x137250 + (idx * 0x04), 0x00003f3f, info->mdiv);
7c856522 BS	396	}
	397
	398	static int
3eca809b	399	gf100_clk_prog(struct nvkm_clk *obj)
7c856522	400	{
3eca809b	401	struct gf100_clk clk = container_of(obj, typeof(clk), base);
7c856522	402	struct {
3eca809b	403	void (exec)(struct gf100_clk , int);
7c856522	404	} stage[] = {
7632b30e BS	405	{ gf100_clk_prog_0 }, /* div programming */
	406	{ gf100_clk_prog_1 }, /* select div mode */
	407	{ gf100_clk_prog_2 }, /* (maybe) program pll */
	408	{ gf100_clk_prog_3 }, /* (maybe) select pll mode */
	409	{ gf100_clk_prog_4 }, /* final divider */
7c856522 BS	410	};
	411	int i, j;
	412
	413	for (i = 0; i < ARRAY_SIZE(stage); i++) {
3eca809b BS	414	for (j = 0; j < ARRAY_SIZE(clk->eng); j++) {
3eca809b BS	415	if (!clk->eng[j].freq)
7c856522	416	continue;
3eca809b	417	stage[i].exec(clk, j);
7c856522 BS	418	}
	419	}
	420
	421	return 0;
	422	}
	423
	424	static void
3eca809b	425	gf100_clk_tidy(struct nvkm_clk *obj)
7c856522	426	{
3eca809b BS	427	struct gf100_clk clk = container_of(obj, typeof(clk), base);
3eca809b BS	428	memset(clk->eng, 0x00, sizeof(clk->eng));
7c856522 BS	429	}
7c856522 BS	430
7632b30e BS	431	static struct nvkm_domain
7632b30e BS	432	gf100_domain[] = {
7c856522 BS	433	{ nv_clk_src_crystal, 0xff },
	434	{ nv_clk_src_href , 0xff },
	435	{ nv_clk_src_hubk06 , 0x00 },
	436	{ nv_clk_src_hubk01 , 0x01 },
	437	{ nv_clk_src_copy , 0x02 },
	438	{ nv_clk_src_gpc , 0x03, 0, "core", 2000 },
	439	{ nv_clk_src_rop , 0x04 },
	440	{ nv_clk_src_mem , 0x05, 0, "memory", 1000 },
	441	{ nv_clk_src_vdec , 0x06 },
	442	{ nv_clk_src_daemon , 0x0a },
	443	{ nv_clk_src_hubk07 , 0x0b },
	444	{ nv_clk_src_max }
8aceb7de BS	445	};
8aceb7de BS	446
8aceb7de	447	static int
7632b30e BS	448	gf100_clk_ctor(struct nvkm_object parent, struct nvkm_object engine,
	449	struct nvkm_oclass oclass, void data, u32 size,
	450	struct nvkm_object **pobject)
8aceb7de	451	{
3eca809b	452	struct gf100_clk *clk;
8aceb7de BS	453	int ret;
8aceb7de BS	454
7632b30e	455	ret = nvkm_clk_create(parent, engine, oclass, gf100_domain,
3eca809b BS	456	NULL, 0, false, &clk);
3eca809b BS	457	*pobject = nv_object(clk);
8aceb7de BS	458	if (ret)
	459	return ret;
	460
3eca809b BS	461	clk->base.read = gf100_clk_read;
	462	clk->base.calc = gf100_clk_calc;
	463	clk->base.prog = gf100_clk_prog;
	464	clk->base.tidy = gf100_clk_tidy;
8aceb7de BS	465	return 0;
	466	}
	467
7632b30e BS	468	struct nvkm_oclass
7632b30e BS	469	gf100_clk_oclass = {
f3867f43	470	.handle = NV_SUBDEV(CLK, 0xc0),
7632b30e BS	471	.ofuncs = &(struct nvkm_ofuncs) {
	472	.ctor = gf100_clk_ctor,
	473	.dtor = _nvkm_clk_dtor,
	474	.init = _nvkm_clk_init,
	475	.fini = _nvkm_clk_fini,
8aceb7de BS	476	},
8aceb7de BS	477	};