481 lines
12 KiB
C
481 lines
12 KiB
C
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/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#define gf100_clk(p) container_of((p), struct gf100_clk, base)
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#include "priv.h"
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#include "pll.h"
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#include <subdev/bios.h>
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#include <subdev/bios/pll.h>
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#include <subdev/timer.h>
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struct gf100_clk_info {
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u32 freq;
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u32 ssel;
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u32 mdiv;
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u32 dsrc;
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u32 ddiv;
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u32 coef;
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};
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struct gf100_clk {
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struct nvkm_clk base;
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struct gf100_clk_info eng[16];
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};
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static u32 read_div(struct gf100_clk *, int, u32, u32);
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static u32
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read_vco(struct gf100_clk *clk, u32 dsrc)
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{
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struct nvkm_device *device = clk->base.subdev.device;
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u32 ssrc = nvkm_rd32(device, dsrc);
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if (!(ssrc & 0x00000100))
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return nvkm_clk_read(&clk->base, nv_clk_src_sppll0);
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return nvkm_clk_read(&clk->base, nv_clk_src_sppll1);
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}
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static u32
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read_pll(struct gf100_clk *clk, u32 pll)
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{
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struct nvkm_device *device = clk->base.subdev.device;
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u32 ctrl = nvkm_rd32(device, pll + 0x00);
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u32 coef = nvkm_rd32(device, pll + 0x04);
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u32 P = (coef & 0x003f0000) >> 16;
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u32 N = (coef & 0x0000ff00) >> 8;
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u32 M = (coef & 0x000000ff) >> 0;
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u32 sclk;
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if (!(ctrl & 0x00000001))
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return 0;
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switch (pll) {
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case 0x00e800:
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case 0x00e820:
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sclk = device->crystal;
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P = 1;
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break;
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case 0x132000:
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sclk = nvkm_clk_read(&clk->base, nv_clk_src_mpllsrc);
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break;
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case 0x132020:
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sclk = nvkm_clk_read(&clk->base, nv_clk_src_mpllsrcref);
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break;
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case 0x137000:
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case 0x137020:
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case 0x137040:
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case 0x1370e0:
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sclk = read_div(clk, (pll & 0xff) / 0x20, 0x137120, 0x137140);
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break;
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default:
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return 0;
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}
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return sclk * N / M / P;
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}
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static u32
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read_div(struct gf100_clk *clk, int doff, u32 dsrc, u32 dctl)
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{
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struct nvkm_device *device = clk->base.subdev.device;
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u32 ssrc = nvkm_rd32(device, dsrc + (doff * 4));
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u32 sclk, sctl, sdiv = 2;
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switch (ssrc & 0x00000003) {
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case 0:
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if ((ssrc & 0x00030000) != 0x00030000)
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return device->crystal;
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return 108000;
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case 2:
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return 100000;
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case 3:
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sclk = read_vco(clk, dsrc + (doff * 4));
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/* Memclk has doff of 0 despite its alt. location */
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if (doff <= 2) {
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sctl = nvkm_rd32(device, dctl + (doff * 4));
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if (sctl & 0x80000000) {
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if (ssrc & 0x100)
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sctl >>= 8;
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sdiv = (sctl & 0x3f) + 2;
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}
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}
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return (sclk * 2) / sdiv;
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default:
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return 0;
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}
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}
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static u32
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read_clk(struct gf100_clk *clk, int idx)
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{
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struct nvkm_device *device = clk->base.subdev.device;
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u32 sctl = nvkm_rd32(device, 0x137250 + (idx * 4));
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u32 ssel = nvkm_rd32(device, 0x137100);
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u32 sclk, sdiv;
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if (ssel & (1 << idx)) {
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if (idx < 7)
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sclk = read_pll(clk, 0x137000 + (idx * 0x20));
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else
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sclk = read_pll(clk, 0x1370e0);
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sdiv = ((sctl & 0x00003f00) >> 8) + 2;
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} else {
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sclk = read_div(clk, idx, 0x137160, 0x1371d0);
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sdiv = ((sctl & 0x0000003f) >> 0) + 2;
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}
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if (sctl & 0x80000000)
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return (sclk * 2) / sdiv;
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return sclk;
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}
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static int
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gf100_clk_read(struct nvkm_clk *base, enum nv_clk_src src)
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{
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struct gf100_clk *clk = gf100_clk(base);
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struct nvkm_subdev *subdev = &clk->base.subdev;
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struct nvkm_device *device = subdev->device;
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switch (src) {
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case nv_clk_src_crystal:
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return device->crystal;
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case nv_clk_src_href:
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return 100000;
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case nv_clk_src_sppll0:
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return read_pll(clk, 0x00e800);
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case nv_clk_src_sppll1:
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return read_pll(clk, 0x00e820);
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case nv_clk_src_mpllsrcref:
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return read_div(clk, 0, 0x137320, 0x137330);
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case nv_clk_src_mpllsrc:
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return read_pll(clk, 0x132020);
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case nv_clk_src_mpll:
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return read_pll(clk, 0x132000);
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case nv_clk_src_mdiv:
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return read_div(clk, 0, 0x137300, 0x137310);
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case nv_clk_src_mem:
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if (nvkm_rd32(device, 0x1373f0) & 0x00000002)
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return nvkm_clk_read(&clk->base, nv_clk_src_mpll);
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return nvkm_clk_read(&clk->base, nv_clk_src_mdiv);
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case nv_clk_src_gpc:
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return read_clk(clk, 0x00);
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case nv_clk_src_rop:
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return read_clk(clk, 0x01);
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case nv_clk_src_hubk07:
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return read_clk(clk, 0x02);
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case nv_clk_src_hubk06:
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return read_clk(clk, 0x07);
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case nv_clk_src_hubk01:
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return read_clk(clk, 0x08);
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case nv_clk_src_copy:
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return read_clk(clk, 0x09);
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case nv_clk_src_pmu:
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return read_clk(clk, 0x0c);
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case nv_clk_src_vdec:
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return read_clk(clk, 0x0e);
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default:
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nvkm_error(subdev, "invalid clock source %d\n", src);
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return -EINVAL;
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}
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}
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static u32
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calc_div(struct gf100_clk *clk, int idx, u32 ref, u32 freq, u32 *ddiv)
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{
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u32 div = min((ref * 2) / freq, (u32)65);
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if (div < 2)
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div = 2;
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*ddiv = div - 2;
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return (ref * 2) / div;
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}
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static u32
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calc_src(struct gf100_clk *clk, int idx, u32 freq, u32 *dsrc, u32 *ddiv)
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{
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u32 sclk;
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/* use one of the fixed frequencies if possible */
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*ddiv = 0x00000000;
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switch (freq) {
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case 27000:
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case 108000:
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*dsrc = 0x00000000;
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if (freq == 108000)
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*dsrc |= 0x00030000;
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return freq;
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case 100000:
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*dsrc = 0x00000002;
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return freq;
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default:
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*dsrc = 0x00000003;
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break;
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}
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/* otherwise, calculate the closest divider */
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sclk = read_vco(clk, 0x137160 + (idx * 4));
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if (idx < 7)
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sclk = calc_div(clk, idx, sclk, freq, ddiv);
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return sclk;
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}
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static u32
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calc_pll(struct gf100_clk *clk, int idx, u32 freq, u32 *coef)
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{
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struct nvkm_subdev *subdev = &clk->base.subdev;
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struct nvkm_bios *bios = subdev->device->bios;
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struct nvbios_pll limits;
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int N, M, P, ret;
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ret = nvbios_pll_parse(bios, 0x137000 + (idx * 0x20), &limits);
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if (ret)
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return 0;
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limits.refclk = read_div(clk, idx, 0x137120, 0x137140);
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if (!limits.refclk)
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return 0;
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ret = gt215_pll_calc(subdev, &limits, freq, &N, NULL, &M, &P);
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if (ret <= 0)
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return 0;
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*coef = (P << 16) | (N << 8) | M;
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return ret;
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}
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static int
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calc_clk(struct gf100_clk *clk, struct nvkm_cstate *cstate, int idx, int dom)
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{
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struct gf100_clk_info *info = &clk->eng[idx];
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u32 freq = cstate->domain[dom];
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u32 src0, div0, div1D, div1P = 0;
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u32 clk0, clk1 = 0;
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/* invalid clock domain */
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if (!freq)
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return 0;
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/* first possible path, using only dividers */
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clk0 = calc_src(clk, idx, freq, &src0, &div0);
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clk0 = calc_div(clk, idx, clk0, freq, &div1D);
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/* see if we can get any closer using PLLs */
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if (clk0 != freq && (0x00004387 & (1 << idx))) {
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if (idx <= 7)
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clk1 = calc_pll(clk, idx, freq, &info->coef);
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else
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clk1 = cstate->domain[nv_clk_src_hubk06];
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clk1 = calc_div(clk, idx, clk1, freq, &div1P);
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}
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/* select the method which gets closest to target freq */
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if (abs((int)freq - clk0) <= abs((int)freq - clk1)) {
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info->dsrc = src0;
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if (div0) {
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info->ddiv |= 0x80000000;
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info->ddiv |= div0 << 8;
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info->ddiv |= div0;
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}
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if (div1D) {
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info->mdiv |= 0x80000000;
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info->mdiv |= div1D;
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}
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info->ssel = info->coef = 0;
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info->freq = clk0;
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} else {
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if (div1P) {
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info->mdiv |= 0x80000000;
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info->mdiv |= div1P << 8;
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}
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info->ssel = (1 << idx);
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info->freq = clk1;
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}
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return 0;
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}
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static int
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gf100_clk_calc(struct nvkm_clk *base, struct nvkm_cstate *cstate)
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{
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struct gf100_clk *clk = gf100_clk(base);
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int ret;
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if ((ret = calc_clk(clk, cstate, 0x00, nv_clk_src_gpc)) ||
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(ret = calc_clk(clk, cstate, 0x01, nv_clk_src_rop)) ||
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(ret = calc_clk(clk, cstate, 0x02, nv_clk_src_hubk07)) ||
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(ret = calc_clk(clk, cstate, 0x07, nv_clk_src_hubk06)) ||
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(ret = calc_clk(clk, cstate, 0x08, nv_clk_src_hubk01)) ||
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(ret = calc_clk(clk, cstate, 0x09, nv_clk_src_copy)) ||
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(ret = calc_clk(clk, cstate, 0x0c, nv_clk_src_pmu)) ||
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(ret = calc_clk(clk, cstate, 0x0e, nv_clk_src_vdec)))
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return ret;
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return 0;
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}
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static void
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gf100_clk_prog_0(struct gf100_clk *clk, int idx)
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{
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struct gf100_clk_info *info = &clk->eng[idx];
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struct nvkm_device *device = clk->base.subdev.device;
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if (idx < 7 && !info->ssel) {
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nvkm_mask(device, 0x1371d0 + (idx * 0x04), 0x80003f3f, info->ddiv);
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nvkm_wr32(device, 0x137160 + (idx * 0x04), info->dsrc);
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}
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}
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static void
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gf100_clk_prog_1(struct gf100_clk *clk, int idx)
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{
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struct nvkm_device *device = clk->base.subdev.device;
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nvkm_mask(device, 0x137100, (1 << idx), 0x00000000);
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|
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);
|
||
|
|
|
||
|
|
/* Test PLL lock */
|
||
|
|
nvkm_mask(device, addr + 0x00, 0x00000010, 0x00000000);
|
||
|
|
nvkm_msec(device, 2000,
|
||
|
|
if (nvkm_rd32(device, addr + 0x00) & 0x00020000)
|
||
|
|
break;
|
||
|
|
);
|
||
|
|
nvkm_mask(device, addr + 0x00, 0x00000010, 0x00000010);
|
||
|
|
|
||
|
|
/* Enable sync mode */
|
||
|
|
nvkm_mask(device, addr + 0x00, 0x00000004, 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 *base)
|
||
|
|
{
|
||
|
|
struct gf100_clk *clk = gf100_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 *base)
|
||
|
|
{
|
||
|
|
struct gf100_clk *clk = gf100_clk(base);
|
||
|
|
memset(clk->eng, 0x00, sizeof(clk->eng));
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct nvkm_clk_func
|
||
|
|
gf100_clk = {
|
||
|
|
.read = gf100_clk_read,
|
||
|
|
.calc = gf100_clk_calc,
|
||
|
|
.prog = gf100_clk_prog,
|
||
|
|
.tidy = gf100_clk_tidy,
|
||
|
|
.domains = {
|
||
|
|
{ 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, NVKM_CLK_DOM_FLAG_VPSTATE, "core", 2000 },
|
||
|
|
{ nv_clk_src_rop , 0x04 },
|
||
|
|
{ nv_clk_src_mem , 0x05, 0, "memory", 1000 },
|
||
|
|
{ nv_clk_src_vdec , 0x06 },
|
||
|
|
{ nv_clk_src_pmu , 0x0a },
|
||
|
|
{ nv_clk_src_hubk07 , 0x0b },
|
||
|
|
{ nv_clk_src_max }
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
int
|
||
|
|
gf100_clk_new(struct nvkm_device *device, int index, struct nvkm_clk **pclk)
|
||
|
|
{
|
||
|
|
struct gf100_clk *clk;
|
||
|
|
|
||
|
|
if (!(clk = kzalloc(sizeof(*clk), GFP_KERNEL)))
|
||
|
|
return -ENOMEM;
|
||
|
|
*pclk = &clk->base;
|
||
|
|
|
||
|
|
return nvkm_clk_ctor(&gf100_clk, device, index, false, &clk->base);
|
||
|
|
}
|