/*
* Copyright 2011 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 <drm/drmP.h>
#include "nouveau_drm.h"
#include "nouveau_bios.h"
#include "nouveau_pm.h"
#include "nouveau_hw.h"
#include <subdev/bios/pll.h>
#include <subdev/clock.h>
#include <subdev/timer.h>
#include <engine/fifo.h>
#define min2(a,b) ((a) < (b) ? (a) : (b))
static u32
read_pll_1(struct drm_device *dev, u32 reg)
{
struct nouveau_device *device = nouveau_dev(dev);
u32 ctrl = nv_rd32(device, reg + 0x00);
int P = (ctrl & 0x00070000) >> 16;
int N = (ctrl & 0x0000ff00) >> 8;
int M = (ctrl & 0x000000ff) >> 0;
u32 ref = 27000, clk = 0;
if (ctrl & 0x80000000)
clk = ref * N / M;
return clk >> P;
}
static u32
read_pll_2(struct drm_device *dev, u32 reg)
{
struct nouveau_device *device = nouveau_dev(dev);
u32 ctrl = nv_rd32(device, reg + 0x00);
u32 coef = nv_rd32(device, reg + 0x04);
int N2 = (coef & 0xff000000) >> 24;
int M2 = (coef & 0x00ff0000) >> 16;
int N1 = (coef & 0x0000ff00) >> 8;
int M1 = (coef & 0x000000ff) >> 0;
int P = (ctrl & 0x00070000) >> 16;
u32 ref = 27000, clk = 0;
if ((ctrl & 0x80000000) && M1) {
clk = ref * N1 / M1;
if ((ctrl & 0x40000100) == 0x40000000) {
if (M2)
clk = clk * N2 / M2;
else
clk = 0;
}
}
return clk >> P;
}
static u32
read_clk(struct drm_device *dev, u32 src)
{
switch (src) {
case 3:
return read_pll_2(dev, 0x004000);
case 2:
return read_pll_1(dev, 0x004008);
default:
break;
}
return 0;
}
int
nv40_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
struct nouveau_device *device = nouveau_dev(dev);
u32 ctrl = nv_rd32(device, 0x00c040);
perflvl->core = read_clk(dev, (ctrl & 0x00000003) >> 0);
perflvl->shader = read_clk(dev, (ctrl & 0x00000030) >> 4);
perflvl->memory = read_pll_2(dev, 0x4020);
return 0;
}
struct nv40_pm_state {
u32 ctrl;
u32 npll_ctrl;
u32 npll_coef;
u32 spll;
u32 mpll_ctrl;
u32 mpll_coef;
};
static int
nv40_calc_pll(struct drm_device *dev, u32 reg, struct nvbios_pll *pll,
u32 clk, int *N1, int *M1, int *N2, int *M2, int *log2P)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_bios *bios = nouveau_bios(device);
struct nouveau_clock *pclk = nouveau_clock(device);
struct nouveau_pll_vals coef;
int ret;
ret = nvbios_pll_parse(bios, reg, pll);
if (ret)
return ret;
if (clk < pll->vco1.max_freq)
pll->vco2.max_freq = 0;
pclk->pll_calc(pclk, pll, clk, &coef);
if (ret == 0)
return -ERANGE;
*N1 = coef.N1;
*M1 = coef.M1;
if (N2 && M2) {
if (pll->vco2.max_freq) {
*N2 = coef.N2;
*M2 = coef.M2;
} else {
*N2 = 1;
*M2 = 1;
}
}
*log2P = coef.log2P;
return 0;
}
void *
nv40_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
struct nv40_pm_state *info;
struct nvbios_pll pll;
int N1, N2, M1, M2, log2P;
int ret;
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return ERR_PTR(-ENOMEM);
/* core/geometric clock */
ret = nv40_calc_pll(dev, 0x004000, &pll, perflvl->core,
&N1, &M1, &N2, &M2, &log2P);
if (ret < 0)
goto out;
if (N2 == M2) {
info->npll_ctrl = 0x80000100 | (log2P << 16);
info->npll_coef = (N1 << 8) | M1;
} else {
info->npll_ctrl = 0xc0000000 | (log2P << 16);
info->npll_coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;
}
/* use the second PLL for shader/rop clock, if it differs from core */
if (perflvl->shader && perflvl->shader != perflvl->core) {
ret = nv40_calc_pll(dev, 0x004008, &pll, perflvl->shader,
&N1, &M1, NULL, NULL, &log2P);
if (ret < 0)
goto out;
info->spll = 0xc0000000 | (log2P << 16) | (N1 << 8) | M1;
info->ctrl = 0x00000223;
} else {
info->spll = 0x00000000;
info->ctrl = 0x00000333;
}
/* memory clock */
if (!perflvl->memory) {
info->mpll_ctrl = 0x00000000;
goto out;
}
ret = nv40_calc_pll(dev, 0x004020, &pll, perflvl->memory,
&N1, &M1, &N2, &M2, &log2P);
if (ret < 0)
goto out;
info->mpll_ctrl = 0x80000000 | (log2P << 16);
info->mpll_ctrl |= min2(pll.bias_p + log2P, pll.max_p) << 20;
if (N2 == M2) {
info->mpll_ctrl |= 0x00000100;
info->mpll_coef = (N1 << 8) | M1;
} else {
info->mpll_ctrl |= 0x40000000;
info->mpll_coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;
}
out:
if (ret < 0) {
kfree(info);
info = ERR_PTR(ret);
}
return info;
}
static bool
nv40_pm_gr_idle(void *data)
{
struct drm_device *dev = data;
struct nouveau_device *device = nouveau_dev(dev);
if ((nv_rd32(device, 0x400760) & 0x000000f0) >> 4 !=
(nv_rd32(device, 0x400760) & 0x0000000f))
return false;
if (nv_rd32(device, 0x400700))
return false;
return true;
}
int
nv40_pm_clocks_set(struct drm_device *dev, void *pre_state)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_fifo *pfifo = nouveau_fifo(device);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nv40_pm_state *info = pre_state;
unsigned long flags;
struct bit_entry M;
u32 crtc_mask = 0;
u8 sr1[2];
int i, ret = -EAGAIN;
/* determine which CRTCs are active, fetch VGA_SR1 for each */
for (i = 0; i < 2; i++) {
u32 vbl = nv_rd32(device, 0x600808 + (i * 0x2000));
u32 cnt = 0;
do {
if (vbl != nv_rd32(device, 0x600808 + (i * 0x2000))) {
nv_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
sr1[i] = nv_rd08(device, 0x0c03c5 + (i * 0x2000));
if (!(sr1[i] & 0x20))
crtc_mask |= (1 << i);
break;
}
udelay(1);
} while (cnt++ < 32);
}
/* halt and idle engines */
pfifo->pause(pfifo, &flags);
if (!nv_wait_cb(device, nv40_pm_gr_idle, dev))
goto resume;
ret = 0;
/* set engine clocks */
nv_mask(device, 0x00c040, 0x00000333, 0x00000000);
nv_wr32(device, 0x004004, info->npll_coef);
nv_mask(device, 0x004000, 0xc0070100, info->npll_ctrl);
nv_mask(device, 0x004008, 0xc007ffff, info->spll);
mdelay(5);
nv_mask(device, 0x00c040, 0x00000333, info->ctrl);
if (!info->mpll_ctrl)
goto resume;
/* wait for vblank start on active crtcs, disable memory access */
for (i = 0; i < 2; i++) {
if (!(crtc_mask & (1 << i)))
continue;
nv_wait(device, 0x600808 + (i * 0x2000), 0x00010000, 0x00000000);
nv_wait(device, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000);
nv_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
nv_wr08(device, 0x0c03c5 + (i * 0x2000), sr1[i] | 0x20);
}
/* prepare ram for reclocking */
nv_wr32(device, 0x1002d4, 0x00000001); /* precharge */
nv_wr32(device, 0x1002d0, 0x00000001); /* refresh */
nv_wr32(device, 0x1002d0, 0x00000001); /* refresh */
nv_mask(device, 0x100210, 0x80000000, 0x00000000); /* no auto refresh */
nv_wr32(device, 0x1002dc, 0x00000001); /* enable self-refresh */
/* change the PLL of each memory partition */
nv_mask(device, 0x00c040, 0x0000c000, 0x00000000);
switch (nv_device(drm->device)->chipset) {
case 0x40:
case 0x45:
case 0x41:
case 0x42:
case 0x47:
nv_mask(device, 0x004044, 0xc0771100, info->mpll_ctrl);
nv_mask(device, 0x00402c, 0xc0771100, info->mpll_ctrl);
nv_wr32(device, 0x004048, info->mpll_coef);
nv_wr32(device, 0x004030, info->mpll_coef);
case 0x43:
case 0x49:
case 0x4b:
nv_mask(device, 0x004038, 0xc0771100, info->mpll_ctrl);
nv_wr32(device, 0x00403c, info->mpll_coef);
default:
nv_mask(device, 0x004020, 0xc0771100, info->mpll_ctrl);
nv_wr32(device, 0x004024, info->mpll_coef);
break;
}
udelay(100);
nv_mask(device, 0x00c040, 0x0000c000, 0x0000c000);
/* re-enable normal operation of memory controller */
nv_wr32(device, 0x1002dc, 0x00000000);
nv_mask(device, 0x100210, 0x80000000, 0x80000000);
udelay(100);
/* execute memory reset script from vbios */
if (!bit_table(dev, 'M', &M))
nouveau_bios_run_init_table(dev, ROM16(M.data[0]), NULL, 0);
/* make sure we're in vblank (hopefully the same one as before), and
* then re-enable crtc memory access
*/
for (i = 0; i < 2; i++) {
if (!(crtc_mask & (1 << i)))
continue;
nv_wait(device, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000);
nv_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
nv_wr08(device, 0x0c03c5 + (i * 0x2000), sr1[i]);
}
/* resume engines */
resume:
pfifo->start(pfifo, &flags);
kfree(info);
return ret;
}
