drivers/video/geode/lxfb_ops.c

   1 /* Geode LX framebuffer driver
   2  *
   3  * Copyright (C) 2006-2007, Advanced Micro Devices,Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/errno.h>
  13 #include <linux/fb.h>
  14 #include <linux/uaccess.h>
  15 #include <linux/delay.h>
  16 #include <linux/cs5535.h>
  17
  18 #include "lxfb.h"
  19
  20 /* TODO
  21  * Support panel scaling
  22  * Add acceleration
  23  * Add support for interlacing (TV out)
  24  * Support compression
  25  */
  26
  27 /* This is the complete list of PLL frequencies that we can set -
  28  * we will choose the closest match to the incoming clock.
  29  * freq is the frequency of the dotclock * 1000 (for example,
  30  * 24823 = 24.983 Mhz).
  31  * pllval is the corresponding PLL value
  32 */
  33
  34 static const struct {
  35   unsigned int pllval;
  36   unsigned int freq;
  37 } pll_table[] = {
  38   { 0x000131AC,   6231 },
  39   { 0x0001215D,   6294 },
  40   { 0x00011087,   6750 },
  41   { 0x0001216C,   7081 },
  42   { 0x0001218D,   7140 },
  43   { 0x000110C9,   7800 },
  44   { 0x00013147,   7875 },
  45   { 0x000110A7,   8258 },
  46   { 0x00012159,   8778 },
  47   { 0x00014249,   8875 },
  48   { 0x00010057,   9000 },
  49   { 0x0001219A,   9472 },
  50   { 0x00012158,   9792 },
  51   { 0x00010045,  10000 },
  52   { 0x00010089,  10791 },
  53   { 0x000110E7,  11225 },
  54   { 0x00012136,  11430 },
  55   { 0x00013207,  12375 },
  56   { 0x00012187,  12500 },
  57   { 0x00014286,  14063 },
  58   { 0x000110E5,  15016 },
  59   { 0x00014214,  16250 },
  60   { 0x00011105,  17045 },
  61   { 0x000131E4,  18563 },
  62   { 0x00013183,  18750 },
  63   { 0x00014284,  19688 },
  64   { 0x00011104,  20400 },
  65   { 0x00016363,  23625 },
  66   { 0x000031AC,  24923 },
  67   { 0x0000215D,  25175 },
  68   { 0x00001087,  27000 },
  69   { 0x0000216C,  28322 },
  70   { 0x0000218D,  28560 },
  71   { 0x000010C9,  31200 },
  72   { 0x00003147,  31500 },
  73   { 0x000010A7,  33032 },
  74   { 0x00002159,  35112 },
  75   { 0x00004249,  35500 },
  76   { 0x00000057,  36000 },
  77   { 0x0000219A,  37889 },
  78   { 0x00002158,  39168 },
  79   { 0x00000045,  40000 },
  80   { 0x00000089,  43163 },
  81   { 0x000010E7,  44900 },
  82   { 0x00002136,  45720 },
  83   { 0x00003207,  49500 },
  84   { 0x00002187,  50000 },
  85   { 0x00004286,  56250 },
  86   { 0x000010E5,  60065 },
  87   { 0x00004214,  65000 },
  88   { 0x00001105,  68179 },
  89   { 0x000031E4,  74250 },
  90   { 0x00003183,  75000 },
  91   { 0x00004284,  78750 },
  92   { 0x00001104,  81600 },
  93   { 0x00006363,  94500 },
  94   { 0x00005303,  97520 },
  95   { 0x00002183, 100187 },
  96   { 0x00002122, 101420 },
  97   { 0x00001081, 108000 },
  98   { 0x00006201, 113310 },
  99   { 0x00000041, 119650 },
 100   { 0x000041A1, 129600 },
 101   { 0x00002182, 133500 },
 102   { 0x000041B1, 135000 },
 103   { 0x00000051, 144000 },
 104   { 0x000041E1, 148500 },
 105   { 0x000062D1, 157500 },
 106   { 0x000031A1, 162000 },
 107   { 0x00000061, 169203 },
 108   { 0x00004231, 172800 },
 109   { 0x00002151, 175500 },
 110   { 0x000052E1, 189000 },
 111   { 0x00000071, 192000 },
 112   { 0x00003201, 198000 },
 113   { 0x00004291, 202500 },
 114   { 0x00001101, 204750 },
 115   { 0x00007481, 218250 },
 116   { 0x00004170, 229500 },
 117   { 0x00006210, 234000 },
 118   { 0x00003140, 251182 },
 119   { 0x00006250, 261000 },
 120   { 0x000041C0, 278400 },
 121   { 0x00005220, 280640 },
 122   { 0x00000050, 288000 },
 123   { 0x000041E0, 297000 },
 124   { 0x00002130, 320207 }
 125 };
 126
 127
 128 static void lx_set_dotpll(u32 pllval)
 129 {
 130         u32 dotpll_lo, dotpll_hi;
 131         int i;
 132
 133         rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
 134
 135         if ((dotpll_lo & MSR_GLCP_DOTPLL_LOCK) && (dotpll_hi == pllval))
 136                 return;
 137
 138         dotpll_hi = pllval;
 139         dotpll_lo &= ~(MSR_GLCP_DOTPLL_BYPASS | MSR_GLCP_DOTPLL_HALFPIX);
 140         dotpll_lo |= MSR_GLCP_DOTPLL_DOTRESET;
 141
 142         wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
 143
 144         /* Wait 100us for the PLL to lock */
 145
 146         udelay(100);
 147
 148         /* Now, loop for the lock bit */
 149
 150         for (i = 0; i < 1000; i++) {
 151                 rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
 152                 if (dotpll_lo & MSR_GLCP_DOTPLL_LOCK)
 153                         break;
 154         }
 155
 156         /* Clear the reset bit */
 157
 158         dotpll_lo &= ~MSR_GLCP_DOTPLL_DOTRESET;
 159         wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
 160 }
 161
 162 /* Set the clock based on the frequency specified by the current mode */
 163
 164 static void lx_set_clock(struct fb_info *info)
 165 {
 166         unsigned int diff, min, best = 0;
 167         unsigned int freq, i;
 168
 169         freq = (unsigned int) (1000000000 / info->var.pixclock);
 170
 171         min = abs(pll_table[0].freq - freq);
 172
 173         for (i = 0; i < ARRAY_SIZE(pll_table); i++) {
 174                 diff = abs(pll_table[i].freq - freq);
 175                 if (diff < min) {
 176                         min = diff;
 177                         best = i;
 178                 }
 179         }
 180
 181         lx_set_dotpll(pll_table[best].pllval & 0x00017FFF);
 182 }
 183
 184 static void lx_graphics_disable(struct fb_info *info)
 185 {
 186         struct lxfb_par *par = info->par;
 187         unsigned int val, gcfg;
 188
 189         /* Note:  This assumes that the video is in a quitet state */
 190
 191         write_vp(par, VP_A1T, 0);
 192         write_vp(par, VP_A2T, 0);
 193         write_vp(par, VP_A3T, 0);
 194
 195         /* Turn off the VGA and video enable */
 196         val = read_dc(par, DC_GENERAL_CFG) & ~(DC_GENERAL_CFG_VGAE |
 197                         DC_GENERAL_CFG_VIDE);
 198
 199         write_dc(par, DC_GENERAL_CFG, val);
 200
 201         val = read_vp(par, VP_VCFG) & ~VP_VCFG_VID_EN;
 202         write_vp(par, VP_VCFG, val);
 203
 204         write_dc(par, DC_IRQ, DC_IRQ_MASK | DC_IRQ_VIP_VSYNC_LOSS_IRQ_MASK |
 205                         DC_IRQ_STATUS | DC_IRQ_VIP_VSYNC_IRQ_STATUS);
 206
 207         val = read_dc(par, DC_GENLK_CTL) & ~DC_GENLK_CTL_GENLK_EN;
 208         write_dc(par, DC_GENLK_CTL, val);
 209
 210         val = read_dc(par, DC_CLR_KEY);
 211         write_dc(par, DC_CLR_KEY, val & ~DC_CLR_KEY_CLR_KEY_EN);
 212
 213         /* turn off the panel */
 214         write_fp(par, FP_PM, read_fp(par, FP_PM) & ~FP_PM_P);
 215
 216         val = read_vp(par, VP_MISC) | VP_MISC_DACPWRDN;
 217         write_vp(par, VP_MISC, val);
 218
 219         /* Turn off the display */
 220
 221         val = read_vp(par, VP_DCFG);
 222         write_vp(par, VP_DCFG, val & ~(VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN |
 223                         VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN));
 224
 225         gcfg = read_dc(par, DC_GENERAL_CFG);
 226         gcfg &= ~(DC_GENERAL_CFG_CMPE | DC_GENERAL_CFG_DECE);
 227         write_dc(par, DC_GENERAL_CFG, gcfg);
 228
 229         /* Turn off the TGEN */
 230         val = read_dc(par, DC_DISPLAY_CFG);
 231         val &= ~DC_DISPLAY_CFG_TGEN;
 232         write_dc(par, DC_DISPLAY_CFG, val);
 233
 234         /* Wait 1000 usecs to ensure that the TGEN is clear */
 235         udelay(1000);
 236
 237         /* Turn off the FIFO loader */
 238
 239         gcfg &= ~DC_GENERAL_CFG_DFLE;
 240         write_dc(par, DC_GENERAL_CFG, gcfg);
 241
 242         /* Lastly, wait for the GP to go idle */
 243
 244         do {
 245                 val = read_gp(par, GP_BLT_STATUS);
 246         } while ((val & GP_BLT_STATUS_PB) || !(val & GP_BLT_STATUS_CE));
 247 }
 248
 249 static void lx_graphics_enable(struct fb_info *info)
 250 {
 251         struct lxfb_par *par = info->par;
 252         u32 temp, config;
 253
 254         /* Set the video request register */
 255         write_vp(par, VP_VRR, 0);
 256
 257         /* Set up the polarities */
 258
 259         config = read_vp(par, VP_DCFG);
 260
 261         config &= ~(VP_DCFG_CRT_SYNC_SKW | VP_DCFG_PWR_SEQ_DELAY |
 262                         VP_DCFG_CRT_HSYNC_POL | VP_DCFG_CRT_VSYNC_POL);
 263
 264         config |= (VP_DCFG_CRT_SYNC_SKW_DEFAULT | VP_DCFG_PWR_SEQ_DELAY_DEFAULT
 265                         | VP_DCFG_GV_GAM);
 266
 267         if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
 268                 config |= VP_DCFG_CRT_HSYNC_POL;
 269
 270         if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
 271                 config |= VP_DCFG_CRT_VSYNC_POL;
 272
 273         if (par->output & OUTPUT_PANEL) {
 274                 u32 msrlo, msrhi;
 275
 276                 write_fp(par, FP_PT1, 0);
 277                 temp = FP_PT2_SCRC;
 278
 279                 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
 280                         temp |= FP_PT2_HSP;
 281
 282                 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
 283                         temp |= FP_PT2_VSP;
 284
 285                 write_fp(par, FP_PT2, temp);
 286                 write_fp(par, FP_DFC, FP_DFC_BC);
 287
 288                 msrlo = MSR_LX_MSR_PADSEL_TFT_SEL_LOW;
 289                 msrhi = MSR_LX_MSR_PADSEL_TFT_SEL_HIGH;
 290
 291                 wrmsr(MSR_LX_MSR_PADSEL, msrlo, msrhi);
 292         }
 293
 294         if (par->output & OUTPUT_CRT) {
 295                 config |= VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN |
 296                                 VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN;
 297         }
 298
 299         write_vp(par, VP_DCFG, config);
 300
 301         /* Turn the CRT dacs back on */
 302
 303         if (par->output & OUTPUT_CRT) {
 304                 temp = read_vp(par, VP_MISC);
 305                 temp &= ~(VP_MISC_DACPWRDN | VP_MISC_APWRDN);
 306                 write_vp(par, VP_MISC, temp);
 307         }
 308
 309         /* Turn the panel on (if it isn't already) */
 310         if (par->output & OUTPUT_PANEL)
 311                 write_fp(par, FP_PM, read_fp(par, FP_PM) | FP_PM_P);
 312 }
 313
 314 unsigned int lx_framebuffer_size(void)
 315 {
 316         unsigned int val;
 317
 318         if (!cs5535_has_vsa2()) {
 319                 uint32_t hi, lo;
 320
 321                 /* The number of pages is (PMAX - PMIN)+1 */
 322                 rdmsr(MSR_GLIU_P2D_RO0, lo, hi);
 323
 324                 /* PMAX */
 325                 val = ((hi & 0xff) << 12) | ((lo & 0xfff00000) >> 20);
 326                 /* PMIN */
 327                 val -= (lo & 0x000fffff);
 328                 val += 1;
 329
 330                 /* The page size is 4k */
 331                 return (val << 12);
 332         }
 333
 334         /* The frame buffer size is reported by a VSM in VSA II */
 335         /* Virtual Register Class    = 0x02                     */
 336         /* VG_MEM_SIZE (1MB units)   = 0x00                     */
 337
 338         outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
 339         outw(VSA_VR_MEM_SIZE, VSA_VRC_INDEX);
 340
 341         val = (unsigned int)(inw(VSA_VRC_DATA)) & 0xFE;
 342         return (val << 20);
 343 }
 344
 345 void lx_set_mode(struct fb_info *info)
 346 {
 347         struct lxfb_par *par = info->par;
 348         u64 msrval;
 349
 350         unsigned int max, dv, val, size;
 351
 352         unsigned int gcfg, dcfg;
 353         int hactive, hblankstart, hsyncstart, hsyncend, hblankend, htotal;
 354         int vactive, vblankstart, vsyncstart, vsyncend, vblankend, vtotal;
 355
 356         /* Unlock the DC registers */
 357         write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
 358
 359         lx_graphics_disable(info);
 360
 361         lx_set_clock(info);
 362
 363         /* Set output mode */
 364
 365         rdmsrl(MSR_LX_GLD_MSR_CONFIG, msrval);
 366         msrval &= ~MSR_LX_GLD_MSR_CONFIG_FMT;
 367
 368         if (par->output & OUTPUT_PANEL) {
 369                 msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_FP;
 370
 371                 if (par->output & OUTPUT_CRT)
 372                         msrval |= MSR_LX_GLD_MSR_CONFIG_FPC;
 373                 else
 374                         msrval &= ~MSR_LX_GLD_MSR_CONFIG_FPC;
 375         } else
 376                 msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_CRT;
 377
 378         wrmsrl(MSR_LX_GLD_MSR_CONFIG, msrval);
 379
 380         /* Clear the various buffers */
 381         /* FIXME:  Adjust for panning here */
 382
 383         write_dc(par, DC_FB_ST_OFFSET, 0);
 384         write_dc(par, DC_CB_ST_OFFSET, 0);
 385         write_dc(par, DC_CURS_ST_OFFSET, 0);
 386
 387         /* FIXME: Add support for interlacing */
 388         /* FIXME: Add support for scaling */
 389
 390         val = read_dc(par, DC_GENLK_CTL);
 391         val &= ~(DC_GENLK_CTL_ALPHA_FLICK_EN | DC_GENLK_CTL_FLICK_EN |
 392                         DC_GENLK_CTL_FLICK_SEL_MASK);
 393
 394         /* Default scaling params */
 395
 396         write_dc(par, DC_GFX_SCALE, (0x4000 << 16) | 0x4000);
 397         write_dc(par, DC_IRQ_FILT_CTL, 0);
 398         write_dc(par, DC_GENLK_CTL, val);
 399
 400         /* FIXME:  Support compression */
 401
 402         if (info->fix.line_length > 4096)
 403                 dv = DC_DV_CTL_DV_LINE_SIZE_8K;
 404         else if (info->fix.line_length > 2048)
 405                 dv = DC_DV_CTL_DV_LINE_SIZE_4K;
 406         else if (info->fix.line_length > 1024)
 407                 dv = DC_DV_CTL_DV_LINE_SIZE_2K;
 408         else
 409                 dv = DC_DV_CTL_DV_LINE_SIZE_1K;
 410
 411         max = info->fix.line_length * info->var.yres;
 412         max = (max + 0x3FF) & 0xFFFFFC00;
 413
 414         write_dc(par, DC_DV_TOP, max | DC_DV_TOP_DV_TOP_EN);
 415
 416         val = read_dc(par, DC_DV_CTL) & ~DC_DV_CTL_DV_LINE_SIZE;
 417         write_dc(par, DC_DV_CTL, val | dv);
 418
 419         size = info->var.xres * (info->var.bits_per_pixel >> 3);
 420
 421         write_dc(par, DC_GFX_PITCH, info->fix.line_length >> 3);
 422         write_dc(par, DC_LINE_SIZE, (size + 7) >> 3);
 423
 424         /* Set default watermark values */
 425
 426         rdmsrl(MSR_LX_SPARE_MSR, msrval);
 427
 428         msrval &= ~(MSR_LX_SPARE_MSR_DIS_CFIFO_HGO
 429                         | MSR_LX_SPARE_MSR_VFIFO_ARB_SEL
 430                         | MSR_LX_SPARE_MSR_LOAD_WM_LPEN_M
 431                         | MSR_LX_SPARE_MSR_WM_LPEN_OVRD);
 432         msrval |= MSR_LX_SPARE_MSR_DIS_VIFO_WM |
 433                         MSR_LX_SPARE_MSR_DIS_INIT_V_PRI;
 434         wrmsrl(MSR_LX_SPARE_MSR, msrval);
 435
 436         gcfg = DC_GENERAL_CFG_DFLE;   /* Display fifo enable */
 437         gcfg |= (0x6 << DC_GENERAL_CFG_DFHPSL_SHIFT) | /* default priority */
 438                         (0xb << DC_GENERAL_CFG_DFHPEL_SHIFT);
 439         gcfg |= DC_GENERAL_CFG_FDTY;  /* Set the frame dirty mode */
 440
 441         dcfg  = DC_DISPLAY_CFG_VDEN;  /* Enable video data */
 442         dcfg |= DC_DISPLAY_CFG_GDEN;  /* Enable graphics */
 443         dcfg |= DC_DISPLAY_CFG_TGEN;  /* Turn on the timing generator */
 444         dcfg |= DC_DISPLAY_CFG_TRUP;  /* Update timings immediately */
 445         dcfg |= DC_DISPLAY_CFG_PALB;  /* Palette bypass in > 8 bpp modes */
 446         dcfg |= DC_DISPLAY_CFG_VISL;
 447         dcfg |= DC_DISPLAY_CFG_DCEN;  /* Always center the display */
 448
 449         /* Set the current BPP mode */
 450
 451         switch (info->var.bits_per_pixel) {
 452         case 8:
 453                 dcfg |= DC_DISPLAY_CFG_DISP_MODE_8BPP;
 454                 break;
 455
 456         case 16:
 457                 dcfg |= DC_DISPLAY_CFG_DISP_MODE_16BPP;
 458                 break;
 459
 460         case 32:
 461         case 24:
 462                 dcfg |= DC_DISPLAY_CFG_DISP_MODE_24BPP;
 463                 break;
 464         }
 465
 466         /* Now - set up the timings */
 467
 468         hactive = info->var.xres;
 469         hblankstart = hactive;
 470         hsyncstart = hblankstart + info->var.right_margin;
 471         hsyncend =  hsyncstart + info->var.hsync_len;
 472         hblankend = hsyncend + info->var.left_margin;
 473         htotal = hblankend;
 474
 475         vactive = info->var.yres;
 476         vblankstart = vactive;
 477         vsyncstart = vblankstart + info->var.lower_margin;
 478         vsyncend =  vsyncstart + info->var.vsync_len;
 479         vblankend = vsyncend + info->var.upper_margin;
 480         vtotal = vblankend;
 481
 482         write_dc(par, DC_H_ACTIVE_TIMING, (hactive - 1) | ((htotal - 1) << 16));
 483         write_dc(par, DC_H_BLANK_TIMING,
 484                         (hblankstart - 1) | ((hblankend - 1) << 16));
 485         write_dc(par, DC_H_SYNC_TIMING,
 486                         (hsyncstart - 1) | ((hsyncend - 1) << 16));
 487
 488         write_dc(par, DC_V_ACTIVE_TIMING, (vactive - 1) | ((vtotal - 1) << 16));
 489         write_dc(par, DC_V_BLANK_TIMING,
 490                         (vblankstart - 1) | ((vblankend - 1) << 16));
 491         write_dc(par, DC_V_SYNC_TIMING,
 492                         (vsyncstart - 1) | ((vsyncend - 1) << 16));
 493
 494         write_dc(par, DC_FB_ACTIVE,
 495                         (info->var.xres - 1) << 16 | (info->var.yres - 1));
 496
 497         /* And re-enable the graphics output */
 498         lx_graphics_enable(info);
 499
 500         /* Write the two main configuration registers */
 501         write_dc(par, DC_DISPLAY_CFG, dcfg);
 502         write_dc(par, DC_ARB_CFG, 0);
 503         write_dc(par, DC_GENERAL_CFG, gcfg);
 504
 505         /* Lock the DC registers */
 506         write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
 507 }
 508
 509 void lx_set_palette_reg(struct fb_info *info, unsigned regno,
 510                         unsigned red, unsigned green, unsigned blue)
 511 {
 512         struct lxfb_par *par = info->par;
 513         int val;
 514
 515         /* Hardware palette is in RGB 8-8-8 format. */
 516
 517         val  = (red   << 8) & 0xff0000;
 518         val |= (green)      & 0x00ff00;
 519         val |= (blue  >> 8) & 0x0000ff;
 520
 521         write_dc(par, DC_PAL_ADDRESS, regno);
 522         write_dc(par, DC_PAL_DATA, val);
 523 }
 524
 525 int lx_blank_display(struct fb_info *info, int blank_mode)
 526 {
 527         struct lxfb_par *par = info->par;
 528         u32 dcfg, misc, fp_pm;
 529         int blank, hsync, vsync;
 530
 531         /* CRT power saving modes. */
 532         switch (blank_mode) {
 533         case FB_BLANK_UNBLANK:
 534                 blank = 0; hsync = 1; vsync = 1;
 535                 break;
 536         case FB_BLANK_NORMAL:
 537                 blank = 1; hsync = 1; vsync = 1;
 538                 break;
 539         case FB_BLANK_VSYNC_SUSPEND:
 540                 blank = 1; hsync = 1; vsync = 0;
 541                 break;
 542         case FB_BLANK_HSYNC_SUSPEND:
 543                 blank = 1; hsync = 0; vsync = 1;
 544                 break;
 545         case FB_BLANK_POWERDOWN:
 546                 blank = 1; hsync = 0; vsync = 0;
 547                 break;
 548         default:
 549                 return -EINVAL;
 550         }
 551
 552         dcfg = read_vp(par, VP_DCFG);
 553         dcfg &= ~(VP_DCFG_DAC_BL_EN | VP_DCFG_HSYNC_EN | VP_DCFG_VSYNC_EN |
 554                         VP_DCFG_CRT_EN);
 555         if (!blank)
 556                 dcfg |= VP_DCFG_DAC_BL_EN | VP_DCFG_CRT_EN;
 557         if (hsync)
 558                 dcfg |= VP_DCFG_HSYNC_EN;
 559         if (vsync)
 560                 dcfg |= VP_DCFG_VSYNC_EN;
 561
 562         write_vp(par, VP_DCFG, dcfg);
 563
 564         misc = read_vp(par, VP_MISC);
 565
 566         if (vsync && hsync)
 567                 misc &= ~VP_MISC_DACPWRDN;
 568         else
 569                 misc |= VP_MISC_DACPWRDN;
 570
 571         write_vp(par, VP_MISC, misc);
 572
 573         /* Power on/off flat panel */
 574
 575         if (par->output & OUTPUT_PANEL) {
 576                 fp_pm = read_fp(par, FP_PM);
 577                 if (blank_mode == FB_BLANK_POWERDOWN)
 578                         fp_pm &= ~FP_PM_P;
 579                 else
 580                         fp_pm |= FP_PM_P;
 581                 write_fp(par, FP_PM, fp_pm);
 582         }
 583
 584         return 0;
 585 }
 586
 587 #ifdef CONFIG_PM
 588
 589 static void lx_save_regs(struct lxfb_par *par)
 590 {
 591         uint32_t filt;
 592         int i;
 593
 594         /* wait for the BLT engine to stop being busy */
 595         do {
 596                 i = read_gp(par, GP_BLT_STATUS);
 597         } while ((i & GP_BLT_STATUS_PB) || !(i & GP_BLT_STATUS_CE));
 598
 599         /* save MSRs */
 600         rdmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel);
 601         rdmsrl(MSR_GLCP_DOTPLL, par->msr.dotpll);
 602         rdmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg);
 603         rdmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare);
 604
 605         write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
 606
 607         /* save registers */
 608         memcpy(par->gp, par->gp_regs, sizeof(par->gp));
 609         memcpy(par->dc, par->dc_regs, sizeof(par->dc));
 610         memcpy(par->vp, par->vp_regs, sizeof(par->vp));
 611         memcpy(par->fp, par->vp_regs + VP_FP_START, sizeof(par->fp));
 612
 613         /* save the palette */
 614         write_dc(par, DC_PAL_ADDRESS, 0);
 615         for (i = 0; i < ARRAY_SIZE(par->pal); i++)
 616                 par->pal[i] = read_dc(par, DC_PAL_DATA);
 617
 618         /* save the horizontal filter coefficients */
 619         filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL;
 620         for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) {
 621                 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
 622                 par->hcoeff[i] = read_dc(par, DC_FILT_COEFF1);
 623                 par->hcoeff[i + 1] = read_dc(par, DC_FILT_COEFF2);
 624         }
 625
 626         /* save the vertical filter coefficients */
 627         filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL;
 628         for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) {
 629                 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
 630                 par->vcoeff[i] = read_dc(par, DC_FILT_COEFF1);
 631         }
 632
 633         /* save video coeff ram */
 634         memcpy(par->vp_coeff, par->vp_regs + VP_VCR, sizeof(par->vp_coeff));
 635 }
 636
 637 static void lx_restore_gfx_proc(struct lxfb_par *par)
 638 {
 639         int i;
 640
 641         /* a bunch of registers require GP_RASTER_MODE to be set first */
 642         write_gp(par, GP_RASTER_MODE, par->gp[GP_RASTER_MODE]);
 643
 644         for (i = 0; i < ARRAY_SIZE(par->gp); i++) {
 645                 switch (i) {
 646                 case GP_RASTER_MODE:
 647                 case GP_VECTOR_MODE:
 648                 case GP_BLT_MODE:
 649                 case GP_BLT_STATUS:
 650                 case GP_HST_SRC:
 651                         /* FIXME: restore LUT data */
 652                 case GP_LUT_INDEX:
 653                 case GP_LUT_DATA:
 654                         /* don't restore these registers */
 655                         break;
 656
 657                 default:
 658                         write_gp(par, i, par->gp[i]);
 659                 }
 660         }
 661 }
 662
 663 static void lx_restore_display_ctlr(struct lxfb_par *par)
 664 {
 665         uint32_t filt;
 666         int i;
 667
 668         wrmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare);
 669
 670         for (i = 0; i < ARRAY_SIZE(par->dc); i++) {
 671                 switch (i) {
 672                 case DC_UNLOCK:
 673                         /* unlock the DC; runs first */
 674                         write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
 675                         break;
 676
 677                 case DC_GENERAL_CFG:
 678                 case DC_DISPLAY_CFG:
 679                         /* disable all while restoring */
 680                         write_dc(par, i, 0);
 681                         break;
 682
 683                 case DC_DV_CTL:
 684                         /* set all ram to dirty */
 685                         write_dc(par, i, par->dc[i] | DC_DV_CTL_CLEAR_DV_RAM);
 686
 687                 case DC_RSVD_1:
 688                 case DC_RSVD_2:
 689                 case DC_RSVD_3:
 690                 case DC_LINE_CNT:
 691                 case DC_PAL_ADDRESS:
 692                 case DC_PAL_DATA:
 693                 case DC_DFIFO_DIAG:
 694                 case DC_CFIFO_DIAG:
 695                 case DC_FILT_COEFF1:
 696                 case DC_FILT_COEFF2:
 697                 case DC_RSVD_4:
 698                 case DC_RSVD_5:
 699                         /* don't restore these registers */
 700                         break;
 701
 702                 default:
 703                         write_dc(par, i, par->dc[i]);
 704                 }
 705         }
 706
 707         /* restore the palette */
 708         write_dc(par, DC_PAL_ADDRESS, 0);
 709         for (i = 0; i < ARRAY_SIZE(par->pal); i++)
 710                 write_dc(par, DC_PAL_DATA, par->pal[i]);
 711
 712         /* restore the horizontal filter coefficients */
 713         filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL;
 714         for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) {
 715                 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
 716                 write_dc(par, DC_FILT_COEFF1, par->hcoeff[i]);
 717                 write_dc(par, DC_FILT_COEFF2, par->hcoeff[i + 1]);
 718         }
 719
 720         /* restore the vertical filter coefficients */
 721         filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL;
 722         for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) {
 723                 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
 724                 write_dc(par, DC_FILT_COEFF1, par->vcoeff[i]);
 725         }
 726 }
 727
 728 static void lx_restore_video_proc(struct lxfb_par *par)
 729 {
 730         int i;
 731
 732         wrmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg);
 733         wrmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel);
 734
 735         for (i = 0; i < ARRAY_SIZE(par->vp); i++) {
 736                 switch (i) {
 737                 case VP_VCFG:
 738                 case VP_DCFG:
 739                 case VP_PAR:
 740                 case VP_PDR:
 741                 case VP_CCS:
 742                 case VP_RSVD_0:
 743                 /* case VP_VDC: */ /* why should this not be restored? */
 744                 case VP_RSVD_1:
 745                 case VP_CRC32:
 746                         /* don't restore these registers */
 747                         break;
 748
 749                 default:
 750                         write_vp(par, i, par->vp[i]);
 751                 }
 752         }
 753
 754         /* restore video coeff ram */
 755         memcpy(par->vp_regs + VP_VCR, par->vp_coeff, sizeof(par->vp_coeff));
 756 }
 757
 758 static void lx_restore_regs(struct lxfb_par *par)
 759 {
 760         int i;
 761
 762         lx_set_dotpll((u32) (par->msr.dotpll >> 32));
 763         lx_restore_gfx_proc(par);
 764         lx_restore_display_ctlr(par);
 765         lx_restore_video_proc(par);
 766
 767         /* Flat Panel */
 768         for (i = 0; i < ARRAY_SIZE(par->fp); i++) {
 769                 switch (i) {
 770                 case FP_PM:
 771                 case FP_RSVD_0:
 772                 case FP_RSVD_1:
 773                 case FP_RSVD_2:
 774                 case FP_RSVD_3:
 775                 case FP_RSVD_4:
 776                         /* don't restore these registers */
 777                         break;
 778
 779                 default:
 780                         write_fp(par, i, par->fp[i]);
 781                 }
 782         }
 783
 784         /* control the panel */
 785         if (par->fp[FP_PM] & FP_PM_P) {
 786                 /* power on the panel if not already power{ed,ing} on */
 787                 if (!(read_fp(par, FP_PM) &
 788                                 (FP_PM_PANEL_ON|FP_PM_PANEL_PWR_UP)))
 789                         write_fp(par, FP_PM, par->fp[FP_PM]);
 790         } else {
 791                 /* power down the panel if not already power{ed,ing} down */
 792                 if (!(read_fp(par, FP_PM) &
 793                                 (FP_PM_PANEL_OFF|FP_PM_PANEL_PWR_DOWN)))
 794                         write_fp(par, FP_PM, par->fp[FP_PM]);
 795         }
 796
 797         /* turn everything on */
 798         write_vp(par, VP_VCFG, par->vp[VP_VCFG]);
 799         write_vp(par, VP_DCFG, par->vp[VP_DCFG]);
 800         write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG]);
 801         /* do this last; it will enable the FIFO load */
 802         write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG]);
 803
 804         /* lock the door behind us */
 805         write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
 806 }
 807
 808 int lx_powerdown(struct fb_info *info)
 809 {
 810         struct lxfb_par *par = info->par;
 811
 812         if (par->powered_down)
 813                 return 0;
 814
 815         lx_save_regs(par);
 816         lx_graphics_disable(info);
 817
 818         par->powered_down = 1;
 819         return 0;
 820 }
 821
 822 int lx_powerup(struct fb_info *info)
 823 {
 824         struct lxfb_par *par = info->par;
 825
 826         if (!par->powered_down)
 827                 return 0;
 828
 829         lx_restore_regs(par);
 830
 831         par->powered_down = 0;
 832         return 0;
 833 }
 834
 835 #endif