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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/delay.h>
#include <linux/pci.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "mgag200_drv.h"
void mgag200_g200wb_init_registers(struct mga_device *mdev)
{
static const u8 dacvalue[] = {
MGAG200_DAC_DEFAULT(0x07, 0xc9, 0x1f, 0x00, 0x00, 0x00)
};
size_t i;
for (i = 0; i < ARRAY_SIZE(dacvalue); i++) {
if ((i <= 0x17) ||
(i == 0x1b) ||
(i == 0x1c) ||
((i >= 0x1f) && (i <= 0x29)) ||
((i >= 0x30) && (i <= 0x37)) ||
((i >= 0x44) && (i <= 0x4e)))
continue;
WREG_DAC(i, dacvalue[i]);
}
mgag200_init_registers(mdev);
}
/*
* PIXPLLC
*/
static int mgag200_g200wb_pixpllc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *new_state)
{
static const unsigned int vcomax = 550000;
static const unsigned int vcomin = 150000;
static const unsigned int pllreffreq = 48000;
struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state);
long clock = new_crtc_state->mode.clock;
struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc;
unsigned int delta, tmpdelta;
unsigned int testp, testm, testn;
unsigned int p, m, n, s;
unsigned int computed;
m = n = p = s = 0;
delta = 0xffffffff;
for (testp = 1; testp < 9; testp++) {
if (clock * testp > vcomax)
continue;
if (clock * testp < vcomin)
continue;
for (testm = 1; testm < 17; testm++) {
for (testn = 1; testn < 151; testn++) {
computed = (pllreffreq * testn) / (testm * testp);
if (computed > clock)
tmpdelta = computed - clock;
else
tmpdelta = clock - computed;
if (tmpdelta < delta) {
delta = tmpdelta;
n = testn;
m = testm;
p = testp;
s = 0;
}
}
}
}
pixpllc->m = m;
pixpllc->n = n;
pixpllc->p = p;
pixpllc->s = s;
return 0;
}
void mgag200_g200wb_pixpllc_atomic_update(struct drm_crtc *crtc,
struct drm_atomic_state *old_state)
{
struct drm_device *dev = crtc->dev;
struct mga_device *mdev = to_mga_device(dev);
struct drm_crtc_state *crtc_state = crtc->state;
struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
struct mgag200_pll_values *pixpllc = &mgag200_crtc_state->pixpllc;
bool pll_locked = false;
unsigned int pixpllcm, pixpllcn, pixpllcp, pixpllcs;
u8 xpixpllcm, xpixpllcn, xpixpllcp, tmp;
int i, j, tmpcount, vcount;
pixpllcm = pixpllc->m - 1;
pixpllcn = pixpllc->n - 1;
pixpllcp = pixpllc->p - 1;
pixpllcs = pixpllc->s;
xpixpllcm = ((pixpllcn & BIT(8)) >> 1) | pixpllcm;
xpixpllcn = pixpllcn;
xpixpllcp = ((pixpllcn & GENMASK(10, 9)) >> 3) | (pixpllcs << 3) | pixpllcp;
WREG_MISC_MASKED(MGAREG_MISC_CLKSEL_MGA, MGAREG_MISC_CLKSEL_MASK);
for (i = 0; i <= 32 && pll_locked == false; i++) {
if (i > 0) {
WREG8(MGAREG_CRTC_INDEX, 0x1e);
tmp = RREG8(MGAREG_CRTC_DATA);
if (tmp < 0xff)
WREG8(MGAREG_CRTC_DATA, tmp+1);
}
/* set pixclkdis to 1 */
WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
tmp = RREG8(DAC_DATA);
tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
WREG8(DAC_DATA, tmp);
WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
tmp = RREG8(DAC_DATA);
tmp |= MGA1064_REMHEADCTL_CLKDIS;
WREG8(DAC_DATA, tmp);
/* select PLL Set C */
tmp = RREG8(MGAREG_MEM_MISC_READ);
tmp |= 0x3 << 2;
WREG8(MGAREG_MEM_MISC_WRITE, tmp);
WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
tmp = RREG8(DAC_DATA);
tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN | 0x80;
WREG8(DAC_DATA, tmp);
udelay(500);
/* reset the PLL */
WREG8(DAC_INDEX, MGA1064_VREF_CTL);
tmp = RREG8(DAC_DATA);
tmp &= ~0x04;
WREG8(DAC_DATA, tmp);
udelay(50);
/* program pixel pll register */
WREG_DAC(MGA1064_WB_PIX_PLLC_N, xpixpllcn);
WREG_DAC(MGA1064_WB_PIX_PLLC_M, xpixpllcm);
WREG_DAC(MGA1064_WB_PIX_PLLC_P, xpixpllcp);
udelay(50);
/* turn pll on */
WREG8(DAC_INDEX, MGA1064_VREF_CTL);
tmp = RREG8(DAC_DATA);
tmp |= 0x04;
WREG_DAC(MGA1064_VREF_CTL, tmp);
udelay(500);
/* select the pixel pll */
WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
tmp = RREG8(DAC_DATA);
tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
WREG8(DAC_DATA, tmp);
WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
tmp = RREG8(DAC_DATA);
tmp &= ~MGA1064_REMHEADCTL_CLKSL_MSK;
tmp |= MGA1064_REMHEADCTL_CLKSL_PLL;
WREG8(DAC_DATA, tmp);
/* reset dotclock rate bit */
WREG8(MGAREG_SEQ_INDEX, 1);
tmp = RREG8(MGAREG_SEQ_DATA);
tmp &= ~0x8;
WREG8(MGAREG_SEQ_DATA, tmp);
WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
tmp = RREG8(DAC_DATA);
tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
WREG8(DAC_DATA, tmp);
vcount = RREG8(MGAREG_VCOUNT);
for (j = 0; j < 30 && pll_locked == false; j++) {
tmpcount = RREG8(MGAREG_VCOUNT);
if (tmpcount < vcount)
vcount = 0;
if ((tmpcount - vcount) > 2)
pll_locked = true;
else
udelay(5);
}
}
WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
tmp = RREG8(DAC_DATA);
tmp &= ~MGA1064_REMHEADCTL_CLKDIS;
WREG_DAC(MGA1064_REMHEADCTL, tmp);
}
/*
* Mode-setting pipeline
*/
static const struct drm_plane_helper_funcs mgag200_g200wb_primary_plane_helper_funcs = {
MGAG200_PRIMARY_PLANE_HELPER_FUNCS,
};
static const struct drm_plane_funcs mgag200_g200wb_primary_plane_funcs = {
MGAG200_PRIMARY_PLANE_FUNCS,
};
static const struct drm_crtc_helper_funcs mgag200_g200wb_crtc_helper_funcs = {
MGAG200_CRTC_HELPER_FUNCS,
};
static const struct drm_crtc_funcs mgag200_g200wb_crtc_funcs = {
MGAG200_CRTC_FUNCS,
};
static int mgag200_g200wb_pipeline_init(struct mga_device *mdev)
{
struct drm_device *dev = &mdev->base;
struct drm_plane *primary_plane = &mdev->primary_plane;
struct drm_crtc *crtc = &mdev->crtc;
int ret;
ret = drm_universal_plane_init(dev, primary_plane, 0,
&mgag200_g200wb_primary_plane_funcs,
mgag200_primary_plane_formats,
mgag200_primary_plane_formats_size,
mgag200_primary_plane_fmtmods,
DRM_PLANE_TYPE_PRIMARY, NULL);
if (ret) {
drm_err(dev, "drm_universal_plane_init() failed: %d\n", ret);
return ret;
}
drm_plane_helper_add(primary_plane, &mgag200_g200wb_primary_plane_helper_funcs);
drm_plane_enable_fb_damage_clips(primary_plane);
ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
&mgag200_g200wb_crtc_funcs, NULL);
if (ret) {
drm_err(dev, "drm_crtc_init_with_planes() failed: %d\n", ret);
return ret;
}
drm_crtc_helper_add(crtc, &mgag200_g200wb_crtc_helper_funcs);
/* FIXME: legacy gamma tables, but atomic gamma doesn't work without */
drm_mode_crtc_set_gamma_size(crtc, MGAG200_LUT_SIZE);
drm_crtc_enable_color_mgmt(crtc, 0, false, MGAG200_LUT_SIZE);
ret = mgag200_vga_bmc_output_init(mdev);
if (ret)
return ret;
return 0;
}
/*
* DRM device
*/
static const struct mgag200_device_info mgag200_g200wb_device_info =
MGAG200_DEVICE_INFO_INIT(1280, 1024, 31877, true, 0, 1, false);
static const struct mgag200_device_funcs mgag200_g200wb_device_funcs = {
.pixpllc_atomic_check = mgag200_g200wb_pixpllc_atomic_check,
.pixpllc_atomic_update = mgag200_g200wb_pixpllc_atomic_update,
};
struct mga_device *mgag200_g200wb_device_create(struct pci_dev *pdev, const struct drm_driver *drv)
{
struct mga_device *mdev;
struct drm_device *dev;
resource_size_t vram_available;
int ret;
mdev = devm_drm_dev_alloc(&pdev->dev, drv, struct mga_device, base);
if (IS_ERR(mdev))
return mdev;
dev = &mdev->base;
pci_set_drvdata(pdev, dev);
ret = mgag200_init_pci_options(pdev, 0x41049120, 0x0000b000);
if (ret)
return ERR_PTR(ret);
ret = mgag200_device_preinit(mdev);
if (ret)
return ERR_PTR(ret);
ret = mgag200_device_init(mdev, &mgag200_g200wb_device_info,
&mgag200_g200wb_device_funcs);
if (ret)
return ERR_PTR(ret);
mgag200_g200wb_init_registers(mdev);
vram_available = mgag200_device_probe_vram(mdev);
ret = mgag200_mode_config_init(mdev, vram_available);
if (ret)
return ERR_PTR(ret);
ret = mgag200_g200wb_pipeline_init(mdev);
if (ret)
return ERR_PTR(ret);
drm_mode_config_reset(dev);
drm_kms_helper_poll_init(dev);
ret = drm_vblank_init(dev, 1);
if (ret)
return ERR_PTR(ret);
return mdev;
}
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