// SPDX-License-Identifier: GPL-2.0-or-later
/* Geode LX framebuffer driver
*
* Copyright (C) 2006-2007, Advanced Micro Devices,Inc.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/cs5535.h>
#include "lxfb.h"
/* TODO
* Support panel scaling
* Add acceleration
* Add support for interlacing (TV out)
* Support compression
*/
/* This is the complete list of PLL frequencies that we can set -
* we will choose the closest match to the incoming clock.
* freq is the frequency of the dotclock * 1000 (for example,
* 24823 = 24.983 Mhz).
* pllval is the corresponding PLL value
*/
static const struct {
unsigned int pllval;
unsigned int freq;
} pll_table[] = {
{ 0x000131AC, 6231 },
{ 0x0001215D, 6294 },
{ 0x00011087, 6750 },
{ 0x0001216C, 7081 },
{ 0x0001218D, 7140 },
{ 0x000110C9, 7800 },
{ 0x00013147, 7875 },
{ 0x000110A7, 8258 },
{ 0x00012159, 8778 },
{ 0x00014249, 8875 },
{ 0x00010057, 9000 },
{ 0x0001219A, 9472 },
{ 0x00012158, 9792 },
{ 0x00010045, 10000 },
{ 0x00010089, 10791 },
{ 0x000110E7, 11225 },
{ 0x00012136, 11430 },
{ 0x00013207, 12375 },
{ 0x00012187, 12500 },
{ 0x00014286, 14063 },
{ 0x000110E5, 15016 },
{ 0x00014214, 16250 },
{ 0x00011105, 17045 },
{ 0x000131E4, 18563 },
{ 0x00013183, 18750 },
{ 0x00014284, 19688 },
{ 0x00011104, 20400 },
{ 0x00016363, 23625 },
{ 0x000031AC, 24923 },
{ 0x0000215D, 25175 },
{ 0x00001087, 27000 },
{ 0x0000216C, 28322 },
{ 0x0000218D, 28560 },
{ 0x000010C9, 31200 },
{ 0x00003147, 31500 },
{ 0x000010A7, 33032 },
{ 0x00002159, 35112 },
{ 0x00004249, 35500 },
{ 0x00000057, 36000 },
{ 0x0000219A, 37889 },
{ 0x00002158, 39168 },
{ 0x00000045, 40000 },
{ 0x00000089, 43163 },
{ 0x000010E7, 44900 },
{ 0x00002136, 45720 },
{ 0x00003207, 49500 },
{ 0x00002187, 50000 },
{ 0x00004286, 56250 },
{ 0x000010E5, 60065 },
{ 0x00004214, 65000 },
{ 0x00001105, 68179 },
{ 0x000031E4, 74250 },
{ 0x00003183, 75000 },
{ 0x00004284, 78750 },
{ 0x00001104, 81600 },
{ 0x00006363, 94500 },
{ 0x00005303, 97520 },
{ 0x00002183, 100187 },
{ 0x00002122, 101420 },
{ 0x00001081, 108000 },
{ 0x00006201, 113310 },
{ 0x00000041, 119650 },
{ 0x000041A1, 129600 },
{ 0x00002182, 133500 },
{ 0x000041B1, 135000 },
{ 0x00000051, 144000 },
{ 0x000041E1, 148500 },
{ 0x000062D1, 157500 },
{ 0x000031A1, 162000 },
{ 0x00000061, 169203 },
{ 0x00004231, 172800 },
{ 0x00002151, 175500 },
{ 0x000052E1, 189000 },
{ 0x00000071, 192000 },
{ 0x00003201, 198000 },
{ 0x00004291, 202500 },
{ 0x00001101, 204750 },
{ 0x00007481, 218250 },
{ 0x00004170, 229500 },
{ 0x00006210, 234000 },
{ 0x00003140, 251182 },
{ 0x00006250, 261000 },
{ 0x000041C0, 278400 },
{ 0x00005220, 280640 },
{ 0x00000050, 288000 },
{ 0x000041E0, 297000 },
{ 0x00002130, 320207 }
};
static void lx_set_dotpll(u32 pllval)
{
u32 dotpll_lo, dotpll_hi;
int i;
rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
if ((dotpll_lo & MSR_GLCP_DOTPLL_LOCK) && (dotpll_hi == pllval))
return;
dotpll_hi = pllval;
dotpll_lo &= ~(MSR_GLCP_DOTPLL_BYPASS | MSR_GLCP_DOTPLL_HALFPIX);
dotpll_lo |= MSR_GLCP_DOTPLL_DOTRESET;
wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
/* Wait 100us for the PLL to lock */
udelay(100);
/* Now, loop for the lock bit */
for (i = 0; i < 1000; i++) {
rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
if (dotpll_lo & MSR_GLCP_DOTPLL_LOCK)
break;
}
/* Clear the reset bit */
dotpll_lo &= ~MSR_GLCP_DOTPLL_DOTRESET;
wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
}
/* Set the clock based on the frequency specified by the current mode */
static void lx_set_clock(struct fb_info *info)
{
unsigned int diff, min, best = 0;
unsigned int freq, i;
freq = (unsigned int) (1000000000 / info->var.pixclock);
min = abs(pll_table[0].freq - freq);
for (i = 0; i < ARRAY_SIZE(pll_table); i++) {
diff = abs(pll_table[i].freq - freq);
if (diff < min) {
min = diff;
best = i;
}
}
lx_set_dotpll(pll_table[best].pllval & 0x00017FFF);
}
static void lx_graphics_disable(struct fb_info *info)
{
struct lxfb_par *par = info->par;
unsigned int val, gcfg;
/* Note: This assumes that the video is in a quitet state */
write_vp(par, VP_A1T, 0);
write_vp(par, VP_A2T, 0);
write_vp(par, VP_A3T, 0);
/* Turn off the VGA and video enable */
val = read_dc(par, DC_GENERAL_CFG) & ~(DC_GENERAL_CFG_VGAE |
DC_GENERAL_CFG_VIDE);
write_dc(par, DC_GENERAL_CFG, val);
val = read_vp(par, VP_VCFG) & ~VP_VCFG_VID_EN;
write_vp(par, VP_VCFG, val);
write_dc(par, DC_IRQ, DC_IRQ_MASK | DC_IRQ_VIP_VSYNC_LOSS_IRQ_MASK |
DC_IRQ_STATUS | DC_IRQ_VIP_VSYNC_IRQ_STATUS);
val = read_dc(par, DC_GENLK_CTL) & ~DC_GENLK_CTL_GENLK_EN;
write_dc(par, DC_GENLK_CTL, val);
val = read_dc(par, DC_CLR_KEY);
write_dc(par, DC_CLR_KEY, val & ~DC_CLR_KEY_CLR_KEY_EN);
/* turn off the panel */
write_fp(par, FP_PM, read_fp(par, FP_PM) & ~FP_PM_P);
val = read_vp(par, VP_MISC) | VP_MISC_DACPWRDN;
write_vp(par, VP_MISC, val);
/* Turn off the display */
val = read_vp(par, VP_DCFG);
write_vp(par, VP_DCFG, val & ~(VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN |
VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN));
gcfg = read_dc(par, DC_GENERAL_CFG);
gcfg &= ~(DC_GENERAL_CFG_CMPE | DC_GENERAL_CFG_DECE);
write_dc(par, DC_GENERAL_CFG, gcfg);
/* Turn off the TGEN */
val = read_dc(par, DC_DISPLAY_CFG);
val &= ~DC_DISPLAY_CFG_TGEN;
write_dc(par, DC_DISPLAY_CFG, val);
/* Wait 1000 usecs to ensure that the TGEN is clear */
udelay(1000);
/* Turn off the FIFO loader */
gcfg &= ~DC_GENERAL_CFG_DFLE;
write_dc(par, DC_GENERAL_CFG, gcfg);
/* Lastly, wait for the GP to go idle */
do {
val = read_gp(par, GP_BLT_STATUS);
} while ((val & GP_BLT_STATUS_PB) || !(val & GP_BLT_STATUS_CE));
}
static void lx_graphics_enable(struct fb_info *info)
{
struct lxfb_par *par = info->par;
u32 temp, config;
/* Set the video request register */
write_vp(par, VP_VRR, 0);
/* Set up the polarities */
config = read_vp(par, VP_DCFG);
config &= ~(VP_DCFG_CRT_SYNC_SKW | VP_DCFG_PWR_SEQ_DELAY |
VP_DCFG_CRT_HSYNC_POL | VP_DCFG_CRT_VSYNC_POL);
config |= (VP_DCFG_CRT_SYNC_SKW_DEFAULT | VP_DCFG_PWR_SEQ_DELAY_DEFAULT
| VP_DCFG_GV_GAM);
if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
config |= VP_DCFG_CRT_HSYNC_POL;
if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
config |= VP_DCFG_CRT_VSYNC_POL;
if (par->output & OUTPUT_PANEL) {
u32 msrlo, msrhi;
write_fp(par, FP_PT1, 0);
temp = FP_PT2_SCRC;
if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
temp |= FP_PT2_HSP;
if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
temp |= FP_PT2_VSP;
write_fp(par, FP_PT2, temp);
write_fp(par, FP_DFC, FP_DFC_BC);
msrlo = MSR_LX_MSR_PADSEL_TFT_SEL_LOW;
msrhi = MSR_LX_MSR_PADSEL_TFT_SEL_HIGH;
wrmsr(MSR_LX_MSR_PADSEL, msrlo, msrhi);
}
if (par->output & OUTPUT_CRT) {
config |= VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN |
VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN;
}
write_vp(par, VP_DCFG, config);
/* Turn the CRT dacs back on */
if (par->output & OUTPUT_CRT) {
temp = read_vp(par, VP_MISC);
temp &= ~(VP_MISC_DACPWRDN | VP_MISC_APWRDN);
write_vp(par, VP_MISC, temp);
}
/* Turn the panel on (if it isn't already) */
if (par->output & OUTPUT_PANEL)
write_fp(par, FP_PM, read_fp(par, FP_PM) | FP_PM_P);
}
unsigned int lx_framebuffer_size(void)
{
unsigned int val;
if (!cs5535_has_vsa2()) {
uint32_t hi, lo;
/* The number of pages is (PMAX - PMIN)+1 */
rdmsr(MSR_GLIU_P2D_RO0, lo, hi);
/* PMAX */
val = ((hi & 0xff) << 12) | ((lo & 0xfff00000) >> 20);
/* PMIN */
val -= (lo & 0x000fffff);
val += 1;
/* The page size is 4k */
return (val << 12);
}
/* The frame buffer size is reported by a VSM in VSA II */
/* Virtual Register Class = 0x02 */
/* VG_MEM_SIZE (1MB units) = 0x00 */
outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
outw(VSA_VR_MEM_SIZE, VSA_VRC_INDEX);
val = (unsigned int)(inw(VSA_VRC_DATA)) & 0xFE;
return (val << 20);
}
void lx_set_mode(struct fb_info *info)
{
struct lxfb_par *par = info->par;
u64 msrval;
unsigned int max, dv, val, size;
unsigned int gcfg, dcfg;
int hactive, hblankstart, hsyncstart, hsyncend, hblankend, htotal;
int vactive, vblankstart, vsyncstart, vsyncend, vblankend, vtotal;
/* Unlock the DC registers */
write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
lx_graphics_disable(info);
lx_set_clock(info);
/* Set output mode */
rdmsrl(MSR_LX_GLD_MSR_CONFIG, msrval);
msrval &= ~MSR_LX_GLD_MSR_CONFIG_FMT;
if (par->output & OUTPUT_PANEL) {
msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_FP;
if (par->output & OUTPUT_CRT)
msrval |= MSR_LX_GLD_MSR_CONFIG_FPC;
else
msrval &= ~MSR_LX_GLD_MSR_CONFIG_FPC;
} else
msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_CRT;
wrmsrl(MSR_LX_GLD_MSR_CONFIG, msrval);
/* Clear the various buffers */
/* FIXME: Adjust for panning here */
write_dc(par, DC_FB_ST_OFFSET, 0);
write_dc(par, DC_CB_ST_OFFSET, 0);
write_dc(par, DC_CURS_ST_OFFSET, 0);
/* FIXME: Add support for interlacing */
/* FIXME: Add support for scaling */
val = read_dc(par, DC_GENLK_CTL);
val &= ~(DC_GENLK_CTL_ALPHA_FLICK_EN | DC_GENLK_CTL_FLICK_EN |
DC_GENLK_CTL_FLICK_SEL_MASK);
/* Default scaling params */
write_dc(par, DC_GFX_SCALE, (0x4000 << 16) | 0x4000);
write_dc(par, DC_IRQ_FILT_CTL, 0);
write_dc(par, DC_GENLK_CTL, val);
/* FIXME: Support compression */
if (info->fix.line_length > 4096)
dv = DC_DV_CTL_DV_LINE_SIZE_8K;
else if (info->fix.line_length > 2048)
dv = DC_DV_CTL_DV_LINE_SIZE_4K;
else if (info->fix.line_length > 1024)
dv = DC_DV_CTL_DV_LINE_SIZE_2K;
else
dv = DC_DV_CTL_DV_LINE_SIZE_1K;
max = info->fix.line_length * info->var.yres;
max = (max + 0x3FF) & 0xFFFFFC00;
write_dc(par, DC_DV_TOP, max | DC_DV_TOP_DV_TOP_EN);
val = read_dc(par, DC_DV_CTL) & ~DC_DV_CTL_DV_LINE_SIZE;
write_dc(par, DC_DV_CTL, val | dv);
size = info->var.xres * (info->var.bits_per_pixel >> 3);
write_dc(par, DC_GFX_PITCH, info->fix.line_length >> 3);
write_dc(par, DC_LINE_SIZE, (size + 7) >> 3);
/* Set default watermark values */
rdmsrl(MSR_LX_SPARE_MSR, msrval);
msrval &= ~(MSR_LX_SPARE_MSR_DIS_CFIFO_HGO
| MSR_LX_SPARE_MSR_VFIFO_ARB_SEL
| MSR_LX_SPARE_MSR_LOAD_WM_LPEN_M
| MSR_LX_SPARE_MSR_WM_LPEN_OVRD);
msrval |= MSR_LX_SPARE_MSR_DIS_VIFO_WM |
MSR_LX_SPARE_MSR_DIS_INIT_V_PRI;
wrmsrl(MSR_LX_SPARE_MSR, msrval);
gcfg = DC_GENERAL_CFG_DFLE; /* Display fifo enable */
gcfg |= (0x6 << DC_GENERAL_CFG_DFHPSL_SHIFT) | /* default priority */
(0xb << DC_GENERAL_CFG_DFHPEL_SHIFT);
gcfg |= DC_GENERAL_CFG_FDTY; /* Set the frame dirty mode */
dcfg = DC_DISPLAY_CFG_VDEN; /* Enable video data */
dcfg |= DC_DISPLAY_CFG_GDEN; /* Enable graphics */
dcfg |= DC_DISPLAY_CFG_TGEN; /* Turn on the timing generator */
dcfg |= DC_DISPLAY_CFG_TRUP; /* Update timings immediately */
dcfg |= DC_DISPLAY_CFG_PALB; /* Palette bypass in > 8 bpp modes */
dcfg |= DC_DISPLAY_CFG_VISL;
dcfg |= DC_DISPLAY_CFG_DCEN; /* Always center the display */
/* Set the current BPP mode */
switch (info->var.bits_per_pixel) {
case 8:
dcfg |= DC_DISPLAY_CFG_DISP_MODE_8BPP;
break;
case 16:
dcfg |= DC_DISPLAY_CFG_DISP_MODE_16BPP;
break;
case 32:
case 24:
dcfg |= DC_DISPLAY_CFG_DISP_MODE_24BPP;
break;
}
/* Now - set up the timings */
hactive = info->var.xres;
hblankstart = hactive;
hsyncstart = hblankstart + info->var.right_margin;
hsyncend = hsyncstart + info->var.hsync_len;
hblankend = hsyncend + info->var.left_margin;
htotal = hblankend;
vactive = info->var.yres;
vblankstart = vactive;
vsyncstart = vblankstart + info->var.lower_margin;
vsyncend = vsyncstart + info->var.vsync_len;
vblankend = vsyncend + info->var.upper_margin;
vtotal = vblankend;
write_dc(par, DC_H_ACTIVE_TIMING, (hactive - 1) | ((htotal - 1) << 16));
write_dc(par, DC_H_BLANK_TIMING,
(hblankstart - 1) | ((hblankend - 1) << 16));
write_dc(par, DC_H_SYNC_TIMING,
(hsyncstart - 1) | ((hsyncend - 1) << 16));
write_dc(par, DC_V_ACTIVE_TIMING, (vactive - 1) | ((vtotal - 1) << 16));
write_dc(par, DC_V_BLANK_TIMING,
(vblankstart - 1) | ((vblankend - 1) << 16));
write_dc(par, DC_V_SYNC_TIMING,
(vsyncstart - 1) | ((vsyncend - 1) << 16));
write_dc(par, DC_FB_ACTIVE,
(info->var.xres - 1) << 16 | (info->var.yres - 1));
/* And re-enable the graphics output */
lx_graphics_enable(info);
/* Write the two main configuration registers */
write_dc(par, DC_DISPLAY_CFG, dcfg);
write_dc(par, DC_ARB_CFG, 0);
write_dc(par, DC_GENERAL_CFG, gcfg);
/* Lock the DC registers */
write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
}
void lx_set_palette_reg(struct fb_info *info, unsigned regno,
unsigned red, unsigned green, unsigned blue)
{
struct lxfb_par *par = info->par;
int val;
/* Hardware palette is in RGB 8-8-8 format. */
val = (red << 8) & 0xff0000;
val |= (green) & 0x00ff00;
val |= (blue >> 8) & 0x0000ff;
write_dc(par, DC_PAL_ADDRESS, regno);
write_dc(par, DC_PAL_DATA, val);
}
int lx_blank_display(struct fb_info *info, int blank_mode)
{
struct lxfb_par *par = info->par;
u32 dcfg, misc, fp_pm;
int blank, hsync, vsync;
/* CRT power saving modes. */
switch (blank_mode) {
case FB_BLANK_UNBLANK:
blank = 0; hsync = 1; vsync = 1;
break;
case FB_BLANK_NORMAL:
blank = 1; hsync = 1; vsync = 1;
break;
case FB_BLANK_VSYNC_SUSPEND:
blank = 1; hsync = 1; vsync = 0;
break;
case FB_BLANK_HSYNC_SUSPEND:
blank = 1; hsync = 0; vsync = 1;
break;
case FB_BLANK_POWERDOWN:
blank = 1; hsync = 0; vsync = 0;
break;
default:
return -EINVAL;
}
dcfg = read_vp(par, VP_DCFG);
dcfg &= ~(VP_DCFG_DAC_BL_EN | VP_DCFG_HSYNC_EN | VP_DCFG_VSYNC_EN |
VP_DCFG_CRT_EN);
if (!blank)
dcfg |= VP_DCFG_DAC_BL_EN | VP_DCFG_CRT_EN;
if (hsync)
dcfg |= VP_DCFG_HSYNC_EN;
if (vsync)
dcfg |= VP_DCFG_VSYNC_EN;
write_vp(par, VP_DCFG, dcfg);
misc = read_vp(par, VP_MISC);
if (vsync && hsync)
misc &= ~VP_MISC_DACPWRDN;
else
misc |= VP_MISC_DACPWRDN;
write_vp(par, VP_MISC, misc);
/* Power on/off flat panel */
if (par->output & OUTPUT_PANEL) {
fp_pm = read_fp(par, FP_PM);
if (blank_mode == FB_BLANK_POWERDOWN)
fp_pm &= ~FP_PM_P;
else
fp_pm |= FP_PM_P;
write_fp(par, FP_PM, fp_pm);
}
return 0;
}
static void lx_save_regs(struct lxfb_par *par)
{
uint32_t filt;
int i;
/* wait for the BLT engine to stop being busy */
do {
i = read_gp(par, GP_BLT_STATUS);
} while ((i & GP_BLT_STATUS_PB) || !(i & GP_BLT_STATUS_CE));
/* save MSRs */
rdmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel);
rdmsrl(MSR_GLCP_DOTPLL, par->msr.dotpll);
rdmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg);
rdmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare);
write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
/* save registers */
memcpy(par->gp, par->gp_regs, sizeof(par->gp));
memcpy(par->dc, par->dc_regs, sizeof(par->dc));
memcpy(par->vp, par->vp_regs, sizeof(par->vp));
memcpy(par->fp, par->vp_regs + VP_FP_START, sizeof(par->fp));
/* save the display controller palette */
write_dc(par, DC_PAL_ADDRESS, 0);
for (i = 0; i < ARRAY_SIZE(par->dc_pal); i++)
par->dc_pal[i] = read_dc(par, DC_PAL_DATA);
/* save the video processor palette */
write_vp(par, VP_PAR, 0);
for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++)
par->vp_pal[i] = read_vp(par, VP_PDR);
/* save the horizontal filter coefficients */
filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL;
for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) {
write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
par->hcoeff[i] = read_dc(par, DC_FILT_COEFF1);
par->hcoeff[i + 1] = read_dc(par, DC_FILT_COEFF2);
}
/* save the vertical filter coefficients */
filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL;
for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) {
write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
par->vcoeff[i] = read_dc(par, DC_FILT_COEFF1);
}
/* save video coeff ram */
memcpy(par->vp_coeff, par->vp_regs + VP_VCR, sizeof(par->vp_coeff));
}
static void lx_restore_gfx_proc(struct lxfb_par *par)
{
int i;
/* a bunch of registers require GP_RASTER_MODE to be set first */
write_gp(par, GP_RASTER_MODE, par->gp[GP_RASTER_MODE]);
for (i = 0; i < ARRAY_SIZE(par->gp); i++) {
switch (i) {
case GP_RASTER_MODE:
case GP_VECTOR_MODE:
case GP_BLT_MODE:
case GP_BLT_STATUS:
case GP_HST_SRC:
/* FIXME: restore LUT data */
case GP_LUT_INDEX:
case GP_LUT_DATA:
/* don't restore these registers */
break;
default:
write_gp(par, i, par->gp[i]);
}
}
}
static void lx_restore_display_ctlr(struct lxfb_par *par)
{
uint32_t filt;
int i;
wrmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare);
for (i = 0; i < ARRAY_SIZE(par->dc); i++) {
switch (i) {
case DC_UNLOCK:
/* unlock the DC; runs first */
write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
break;
case DC_GENERAL_CFG:
case DC_DISPLAY_CFG:
/* disable all while restoring */
write_dc(par, i, 0);
break;
case DC_DV_CTL:
/* set all ram to dirty */
write_dc(par, i, par->dc[i] | DC_DV_CTL_CLEAR_DV_RAM);
break;
case DC_RSVD_1:
case DC_RSVD_2:
case DC_RSVD_3:
case DC_LINE_CNT:
case DC_PAL_ADDRESS:
case DC_PAL_DATA:
case DC_DFIFO_DIAG:
case DC_CFIFO_DIAG:
case DC_FILT_COEFF1:
case DC_FILT_COEFF2:
case DC_RSVD_4:
case DC_RSVD_5:
/* don't restore these registers */
break;
default:
write_dc(par, i, par->dc[i]);
}
}
/* restore the palette */
write_dc(par, DC_PAL_ADDRESS, 0);
for (i = 0; i < ARRAY_SIZE(par->dc_pal); i++)
write_dc(par, DC_PAL_DATA, par->dc_pal[i]);
/* restore the horizontal filter coefficients */
filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL;
for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) {
write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
write_dc(par, DC_FILT_COEFF1, par->hcoeff[i]);
write_dc(par, DC_FILT_COEFF2, par->hcoeff[i + 1]);
}
/* restore the vertical filter coefficients */
filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL;
for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) {
write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
write_dc(par, DC_FILT_COEFF1, par->vcoeff[i]);
}
}
static void lx_restore_video_proc(struct lxfb_par *par)
{
int i;
wrmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg);
wrmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel);
for (i = 0; i < ARRAY_SIZE(par->vp); i++) {
switch (i) {
case VP_VCFG:
case VP_DCFG:
case VP_PAR:
case VP_PDR:
case VP_CCS:
case VP_RSVD_0:
/* case VP_VDC: */ /* why should this not be restored? */
case VP_RSVD_1:
case VP_CRC32:
/* don't restore these registers */
break;
default:
write_vp(par, i, par->vp[i]);
}
}
/* restore video processor palette */
write_vp(par, VP_PAR, 0);
for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++)
write_vp(par, VP_PDR, par->vp_pal[i]);
/* restore video coeff ram */
memcpy(par->vp_regs + VP_VCR, par->vp_coeff, sizeof(par->vp_coeff));
}
static void lx_restore_regs(struct lxfb_par *par)
{
int i;
lx_set_dotpll((u32) (par->msr.dotpll >> 32));
lx_restore_gfx_proc(par);
lx_restore_display_ctlr(par);
lx_restore_video_proc(par);
/* Flat Panel */
for (i = 0; i < ARRAY_SIZE(par->fp); i++) {
switch (i) {
case FP_PM:
case FP_RSVD_0:
case FP_RSVD_1:
case FP_RSVD_2:
case FP_RSVD_3:
case FP_RSVD_4:
/* don't restore these registers */
break;
default:
write_fp(par, i, par->fp[i]);
}
}
/* control the panel */
if (par->fp[FP_PM] & FP_PM_P) {
/* power on the panel if not already power{ed,ing} on */
if (!(read_fp(par, FP_PM) &
(FP_PM_PANEL_ON|FP_PM_PANEL_PWR_UP)))
write_fp(par, FP_PM, par->fp[FP_PM]);
} else {
/* power down the panel if not already power{ed,ing} down */
if (!(read_fp(par, FP_PM) &
(FP_PM_PANEL_OFF|FP_PM_PANEL_PWR_DOWN)))
write_fp(par, FP_PM, par->fp[FP_PM]);
}
/* turn everything on */
write_vp(par, VP_VCFG, par->vp[VP_VCFG]);
write_vp(par, VP_DCFG, par->vp[VP_DCFG]);
write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG]);
/* do this last; it will enable the FIFO load */
write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG]);
/* lock the door behind us */
write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
}
int lx_powerdown(struct fb_info *info)
{
struct lxfb_par *par = info->par;
if (par->powered_down)
return 0;
lx_save_regs(par);
lx_graphics_disable(info);
par->powered_down = 1;
return 0;
}
int lx_powerup(struct fb_info *info)
{
struct lxfb_par *par = info->par;
if (!par->powered_down)
return 0;
lx_restore_regs(par);
par->powered_down = 0;
return 0;
}
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