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 display controller palette */ 614 write_dc(par, DC_PAL_ADDRESS, 0); 615 for (i = 0; i < ARRAY_SIZE(par->dc_pal); i++) 616 par->dc_pal[i] = read_dc(par, DC_PAL_DATA); 617 618 /* save the video processor palette */ 619 write_vp(par, VP_PAR, 0); 620 for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++) 621 par->vp_pal[i] = read_vp(par, VP_PDR); 622 623 /* save the horizontal filter coefficients */ 624 filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL; 625 for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) { 626 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); 627 par->hcoeff[i] = read_dc(par, DC_FILT_COEFF1); 628 par->hcoeff[i + 1] = read_dc(par, DC_FILT_COEFF2); 629 } 630 631 /* save the vertical filter coefficients */ 632 filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL; 633 for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) { 634 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); 635 par->vcoeff[i] = read_dc(par, DC_FILT_COEFF1); 636 } 637 638 /* save video coeff ram */ 639 memcpy(par->vp_coeff, par->vp_regs + VP_VCR, sizeof(par->vp_coeff)); 640 } 641 642 static void lx_restore_gfx_proc(struct lxfb_par *par) 643 { 644 int i; 645 646 /* a bunch of registers require GP_RASTER_MODE to be set first */ 647 write_gp(par, GP_RASTER_MODE, par->gp[GP_RASTER_MODE]); 648 649 for (i = 0; i < ARRAY_SIZE(par->gp); i++) { 650 switch (i) { 651 case GP_RASTER_MODE: 652 case GP_VECTOR_MODE: 653 case GP_BLT_MODE: 654 case GP_BLT_STATUS: 655 case GP_HST_SRC: 656 /* FIXME: restore LUT data */ 657 case GP_LUT_INDEX: 658 case GP_LUT_DATA: 659 /* don't restore these registers */ 660 break; 661 662 default: 663 write_gp(par, i, par->gp[i]); 664 } 665 } 666 } 667 668 static void lx_restore_display_ctlr(struct lxfb_par *par) 669 { 670 uint32_t filt; 671 int i; 672 673 wrmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare); 674 675 for (i = 0; i < ARRAY_SIZE(par->dc); i++) { 676 switch (i) { 677 case DC_UNLOCK: 678 /* unlock the DC; runs first */ 679 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); 680 break; 681 682 case DC_GENERAL_CFG: 683 case DC_DISPLAY_CFG: 684 /* disable all while restoring */ 685 write_dc(par, i, 0); 686 break; 687 688 case DC_DV_CTL: 689 /* set all ram to dirty */ 690 write_dc(par, i, par->dc[i] | DC_DV_CTL_CLEAR_DV_RAM); 691 692 case DC_RSVD_1: 693 case DC_RSVD_2: 694 case DC_RSVD_3: 695 case DC_LINE_CNT: 696 case DC_PAL_ADDRESS: 697 case DC_PAL_DATA: 698 case DC_DFIFO_DIAG: 699 case DC_CFIFO_DIAG: 700 case DC_FILT_COEFF1: 701 case DC_FILT_COEFF2: 702 case DC_RSVD_4: 703 case DC_RSVD_5: 704 /* don't restore these registers */ 705 break; 706 707 default: 708 write_dc(par, i, par->dc[i]); 709 } 710 } 711 712 /* restore the palette */ 713 write_dc(par, DC_PAL_ADDRESS, 0); 714 for (i = 0; i < ARRAY_SIZE(par->dc_pal); i++) 715 write_dc(par, DC_PAL_DATA, par->dc_pal[i]); 716 717 /* restore the horizontal filter coefficients */ 718 filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL; 719 for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) { 720 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); 721 write_dc(par, DC_FILT_COEFF1, par->hcoeff[i]); 722 write_dc(par, DC_FILT_COEFF2, par->hcoeff[i + 1]); 723 } 724 725 /* restore the vertical filter coefficients */ 726 filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL; 727 for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) { 728 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); 729 write_dc(par, DC_FILT_COEFF1, par->vcoeff[i]); 730 } 731 } 732 733 static void lx_restore_video_proc(struct lxfb_par *par) 734 { 735 int i; 736 737 wrmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg); 738 wrmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel); 739 740 for (i = 0; i < ARRAY_SIZE(par->vp); i++) { 741 switch (i) { 742 case VP_VCFG: 743 case VP_DCFG: 744 case VP_PAR: 745 case VP_PDR: 746 case VP_CCS: 747 case VP_RSVD_0: 748 /* case VP_VDC: */ /* why should this not be restored? */ 749 case VP_RSVD_1: 750 case VP_CRC32: 751 /* don't restore these registers */ 752 break; 753 754 default: 755 write_vp(par, i, par->vp[i]); 756 } 757 } 758 759 /* restore video processor palette */ 760 write_vp(par, VP_PAR, 0); 761 for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++) 762 write_vp(par, VP_PDR, par->vp_pal[i]); 763 764 /* restore video coeff ram */ 765 memcpy(par->vp_regs + VP_VCR, par->vp_coeff, sizeof(par->vp_coeff)); 766 } 767 768 static void lx_restore_regs(struct lxfb_par *par) 769 { 770 int i; 771 772 lx_set_dotpll((u32) (par->msr.dotpll >> 32)); 773 lx_restore_gfx_proc(par); 774 lx_restore_display_ctlr(par); 775 lx_restore_video_proc(par); 776 777 /* Flat Panel */ 778 for (i = 0; i < ARRAY_SIZE(par->fp); i++) { 779 switch (i) { 780 case FP_PM: 781 case FP_RSVD_0: 782 case FP_RSVD_1: 783 case FP_RSVD_2: 784 case FP_RSVD_3: 785 case FP_RSVD_4: 786 /* don't restore these registers */ 787 break; 788 789 default: 790 write_fp(par, i, par->fp[i]); 791 } 792 } 793 794 /* control the panel */ 795 if (par->fp[FP_PM] & FP_PM_P) { 796 /* power on the panel if not already power{ed,ing} on */ 797 if (!(read_fp(par, FP_PM) & 798 (FP_PM_PANEL_ON|FP_PM_PANEL_PWR_UP))) 799 write_fp(par, FP_PM, par->fp[FP_PM]); 800 } else { 801 /* power down the panel if not already power{ed,ing} down */ 802 if (!(read_fp(par, FP_PM) & 803 (FP_PM_PANEL_OFF|FP_PM_PANEL_PWR_DOWN))) 804 write_fp(par, FP_PM, par->fp[FP_PM]); 805 } 806 807 /* turn everything on */ 808 write_vp(par, VP_VCFG, par->vp[VP_VCFG]); 809 write_vp(par, VP_DCFG, par->vp[VP_DCFG]); 810 write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG]); 811 /* do this last; it will enable the FIFO load */ 812 write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG]); 813 814 /* lock the door behind us */ 815 write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK); 816 } 817 818 int lx_powerdown(struct fb_info *info) 819 { 820 struct lxfb_par *par = info->par; 821 822 if (par->powered_down) 823 return 0; 824 825 lx_save_regs(par); 826 lx_graphics_disable(info); 827 828 par->powered_down = 1; 829 return 0; 830 } 831 832 int lx_powerup(struct fb_info *info) 833 { 834 struct lxfb_par *par = info->par; 835 836 if (!par->powered_down) 837 return 0; 838 839 lx_restore_regs(par); 840 841 par->powered_down = 0; 842 return 0; 843 } 844 845 #endif 846