1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* Geode LX framebuffer driver 3 * 4 * Copyright (C) 2006-2007, Advanced Micro Devices,Inc. 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/errno.h> 9 #include <linux/fb.h> 10 #include <linux/uaccess.h> 11 #include <linux/delay.h> 12 #include <linux/cs5535.h> 13 14 #include "lxfb.h" 15 16 /* TODO 17 * Support panel scaling 18 * Add acceleration 19 * Add support for interlacing (TV out) 20 * Support compression 21 */ 22 23 /* This is the complete list of PLL frequencies that we can set - 24 * we will choose the closest match to the incoming clock. 25 * freq is the frequency of the dotclock * 1000 (for example, 26 * 24823 = 24.983 Mhz). 27 * pllval is the corresponding PLL value 28 */ 29 30 static const struct { 31 unsigned int pllval; 32 unsigned int freq; 33 } pll_table[] = { 34 { 0x000131AC, 6231 }, 35 { 0x0001215D, 6294 }, 36 { 0x00011087, 6750 }, 37 { 0x0001216C, 7081 }, 38 { 0x0001218D, 7140 }, 39 { 0x000110C9, 7800 }, 40 { 0x00013147, 7875 }, 41 { 0x000110A7, 8258 }, 42 { 0x00012159, 8778 }, 43 { 0x00014249, 8875 }, 44 { 0x00010057, 9000 }, 45 { 0x0001219A, 9472 }, 46 { 0x00012158, 9792 }, 47 { 0x00010045, 10000 }, 48 { 0x00010089, 10791 }, 49 { 0x000110E7, 11225 }, 50 { 0x00012136, 11430 }, 51 { 0x00013207, 12375 }, 52 { 0x00012187, 12500 }, 53 { 0x00014286, 14063 }, 54 { 0x000110E5, 15016 }, 55 { 0x00014214, 16250 }, 56 { 0x00011105, 17045 }, 57 { 0x000131E4, 18563 }, 58 { 0x00013183, 18750 }, 59 { 0x00014284, 19688 }, 60 { 0x00011104, 20400 }, 61 { 0x00016363, 23625 }, 62 { 0x000031AC, 24923 }, 63 { 0x0000215D, 25175 }, 64 { 0x00001087, 27000 }, 65 { 0x0000216C, 28322 }, 66 { 0x0000218D, 28560 }, 67 { 0x000010C9, 31200 }, 68 { 0x00003147, 31500 }, 69 { 0x000010A7, 33032 }, 70 { 0x00002159, 35112 }, 71 { 0x00004249, 35500 }, 72 { 0x00000057, 36000 }, 73 { 0x0000219A, 37889 }, 74 { 0x00002158, 39168 }, 75 { 0x00000045, 40000 }, 76 { 0x00000089, 43163 }, 77 { 0x000010E7, 44900 }, 78 { 0x00002136, 45720 }, 79 { 0x00003207, 49500 }, 80 { 0x00002187, 50000 }, 81 { 0x00004286, 56250 }, 82 { 0x000010E5, 60065 }, 83 { 0x00004214, 65000 }, 84 { 0x00001105, 68179 }, 85 { 0x000031E4, 74250 }, 86 { 0x00003183, 75000 }, 87 { 0x00004284, 78750 }, 88 { 0x00001104, 81600 }, 89 { 0x00006363, 94500 }, 90 { 0x00005303, 97520 }, 91 { 0x00002183, 100187 }, 92 { 0x00002122, 101420 }, 93 { 0x00001081, 108000 }, 94 { 0x00006201, 113310 }, 95 { 0x00000041, 119650 }, 96 { 0x000041A1, 129600 }, 97 { 0x00002182, 133500 }, 98 { 0x000041B1, 135000 }, 99 { 0x00000051, 144000 }, 100 { 0x000041E1, 148500 }, 101 { 0x000062D1, 157500 }, 102 { 0x000031A1, 162000 }, 103 { 0x00000061, 169203 }, 104 { 0x00004231, 172800 }, 105 { 0x00002151, 175500 }, 106 { 0x000052E1, 189000 }, 107 { 0x00000071, 192000 }, 108 { 0x00003201, 198000 }, 109 { 0x00004291, 202500 }, 110 { 0x00001101, 204750 }, 111 { 0x00007481, 218250 }, 112 { 0x00004170, 229500 }, 113 { 0x00006210, 234000 }, 114 { 0x00003140, 251182 }, 115 { 0x00006250, 261000 }, 116 { 0x000041C0, 278400 }, 117 { 0x00005220, 280640 }, 118 { 0x00000050, 288000 }, 119 { 0x000041E0, 297000 }, 120 { 0x00002130, 320207 } 121 }; 122 123 124 static void lx_set_dotpll(u32 pllval) 125 { 126 u32 dotpll_lo, dotpll_hi; 127 int i; 128 129 rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi); 130 131 if ((dotpll_lo & MSR_GLCP_DOTPLL_LOCK) && (dotpll_hi == pllval)) 132 return; 133 134 dotpll_hi = pllval; 135 dotpll_lo &= ~(MSR_GLCP_DOTPLL_BYPASS | MSR_GLCP_DOTPLL_HALFPIX); 136 dotpll_lo |= MSR_GLCP_DOTPLL_DOTRESET; 137 138 wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi); 139 140 /* Wait 100us for the PLL to lock */ 141 142 udelay(100); 143 144 /* Now, loop for the lock bit */ 145 146 for (i = 0; i < 1000; i++) { 147 rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi); 148 if (dotpll_lo & MSR_GLCP_DOTPLL_LOCK) 149 break; 150 } 151 152 /* Clear the reset bit */ 153 154 dotpll_lo &= ~MSR_GLCP_DOTPLL_DOTRESET; 155 wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi); 156 } 157 158 /* Set the clock based on the frequency specified by the current mode */ 159 160 static void lx_set_clock(struct fb_info *info) 161 { 162 unsigned int diff, min, best = 0; 163 unsigned int freq, i; 164 165 freq = (unsigned int) (1000000000 / info->var.pixclock); 166 167 min = abs(pll_table[0].freq - freq); 168 169 for (i = 0; i < ARRAY_SIZE(pll_table); i++) { 170 diff = abs(pll_table[i].freq - freq); 171 if (diff < min) { 172 min = diff; 173 best = i; 174 } 175 } 176 177 lx_set_dotpll(pll_table[best].pllval & 0x00017FFF); 178 } 179 180 static void lx_graphics_disable(struct fb_info *info) 181 { 182 struct lxfb_par *par = info->par; 183 unsigned int val, gcfg; 184 185 /* Note: This assumes that the video is in a quitet state */ 186 187 write_vp(par, VP_A1T, 0); 188 write_vp(par, VP_A2T, 0); 189 write_vp(par, VP_A3T, 0); 190 191 /* Turn off the VGA and video enable */ 192 val = read_dc(par, DC_GENERAL_CFG) & ~(DC_GENERAL_CFG_VGAE | 193 DC_GENERAL_CFG_VIDE); 194 195 write_dc(par, DC_GENERAL_CFG, val); 196 197 val = read_vp(par, VP_VCFG) & ~VP_VCFG_VID_EN; 198 write_vp(par, VP_VCFG, val); 199 200 write_dc(par, DC_IRQ, DC_IRQ_MASK | DC_IRQ_VIP_VSYNC_LOSS_IRQ_MASK | 201 DC_IRQ_STATUS | DC_IRQ_VIP_VSYNC_IRQ_STATUS); 202 203 val = read_dc(par, DC_GENLK_CTL) & ~DC_GENLK_CTL_GENLK_EN; 204 write_dc(par, DC_GENLK_CTL, val); 205 206 val = read_dc(par, DC_CLR_KEY); 207 write_dc(par, DC_CLR_KEY, val & ~DC_CLR_KEY_CLR_KEY_EN); 208 209 /* turn off the panel */ 210 write_fp(par, FP_PM, read_fp(par, FP_PM) & ~FP_PM_P); 211 212 val = read_vp(par, VP_MISC) | VP_MISC_DACPWRDN; 213 write_vp(par, VP_MISC, val); 214 215 /* Turn off the display */ 216 217 val = read_vp(par, VP_DCFG); 218 write_vp(par, VP_DCFG, val & ~(VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN | 219 VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN)); 220 221 gcfg = read_dc(par, DC_GENERAL_CFG); 222 gcfg &= ~(DC_GENERAL_CFG_CMPE | DC_GENERAL_CFG_DECE); 223 write_dc(par, DC_GENERAL_CFG, gcfg); 224 225 /* Turn off the TGEN */ 226 val = read_dc(par, DC_DISPLAY_CFG); 227 val &= ~DC_DISPLAY_CFG_TGEN; 228 write_dc(par, DC_DISPLAY_CFG, val); 229 230 /* Wait 1000 usecs to ensure that the TGEN is clear */ 231 udelay(1000); 232 233 /* Turn off the FIFO loader */ 234 235 gcfg &= ~DC_GENERAL_CFG_DFLE; 236 write_dc(par, DC_GENERAL_CFG, gcfg); 237 238 /* Lastly, wait for the GP to go idle */ 239 240 do { 241 val = read_gp(par, GP_BLT_STATUS); 242 } while ((val & GP_BLT_STATUS_PB) || !(val & GP_BLT_STATUS_CE)); 243 } 244 245 static void lx_graphics_enable(struct fb_info *info) 246 { 247 struct lxfb_par *par = info->par; 248 u32 temp, config; 249 250 /* Set the video request register */ 251 write_vp(par, VP_VRR, 0); 252 253 /* Set up the polarities */ 254 255 config = read_vp(par, VP_DCFG); 256 257 config &= ~(VP_DCFG_CRT_SYNC_SKW | VP_DCFG_PWR_SEQ_DELAY | 258 VP_DCFG_CRT_HSYNC_POL | VP_DCFG_CRT_VSYNC_POL); 259 260 config |= (VP_DCFG_CRT_SYNC_SKW_DEFAULT | VP_DCFG_PWR_SEQ_DELAY_DEFAULT 261 | VP_DCFG_GV_GAM); 262 263 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT) 264 config |= VP_DCFG_CRT_HSYNC_POL; 265 266 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT) 267 config |= VP_DCFG_CRT_VSYNC_POL; 268 269 if (par->output & OUTPUT_PANEL) { 270 u32 msrlo, msrhi; 271 272 write_fp(par, FP_PT1, 0); 273 temp = FP_PT2_SCRC; 274 275 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) 276 temp |= FP_PT2_HSP; 277 278 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) 279 temp |= FP_PT2_VSP; 280 281 write_fp(par, FP_PT2, temp); 282 write_fp(par, FP_DFC, FP_DFC_BC); 283 284 msrlo = MSR_LX_MSR_PADSEL_TFT_SEL_LOW; 285 msrhi = MSR_LX_MSR_PADSEL_TFT_SEL_HIGH; 286 287 wrmsr(MSR_LX_MSR_PADSEL, msrlo, msrhi); 288 } 289 290 if (par->output & OUTPUT_CRT) { 291 config |= VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN | 292 VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN; 293 } 294 295 write_vp(par, VP_DCFG, config); 296 297 /* Turn the CRT dacs back on */ 298 299 if (par->output & OUTPUT_CRT) { 300 temp = read_vp(par, VP_MISC); 301 temp &= ~(VP_MISC_DACPWRDN | VP_MISC_APWRDN); 302 write_vp(par, VP_MISC, temp); 303 } 304 305 /* Turn the panel on (if it isn't already) */ 306 if (par->output & OUTPUT_PANEL) 307 write_fp(par, FP_PM, read_fp(par, FP_PM) | FP_PM_P); 308 } 309 310 unsigned int lx_framebuffer_size(void) 311 { 312 unsigned int val; 313 314 if (!cs5535_has_vsa2()) { 315 uint32_t hi, lo; 316 317 /* The number of pages is (PMAX - PMIN)+1 */ 318 rdmsr(MSR_GLIU_P2D_RO0, lo, hi); 319 320 /* PMAX */ 321 val = ((hi & 0xff) << 12) | ((lo & 0xfff00000) >> 20); 322 /* PMIN */ 323 val -= (lo & 0x000fffff); 324 val += 1; 325 326 /* The page size is 4k */ 327 return (val << 12); 328 } 329 330 /* The frame buffer size is reported by a VSM in VSA II */ 331 /* Virtual Register Class = 0x02 */ 332 /* VG_MEM_SIZE (1MB units) = 0x00 */ 333 334 outw(VSA_VR_UNLOCK, VSA_VRC_INDEX); 335 outw(VSA_VR_MEM_SIZE, VSA_VRC_INDEX); 336 337 val = (unsigned int)(inw(VSA_VRC_DATA)) & 0xFE; 338 return (val << 20); 339 } 340 341 void lx_set_mode(struct fb_info *info) 342 { 343 struct lxfb_par *par = info->par; 344 u64 msrval; 345 346 unsigned int max, dv, val, size; 347 348 unsigned int gcfg, dcfg; 349 int hactive, hblankstart, hsyncstart, hsyncend, hblankend, htotal; 350 int vactive, vblankstart, vsyncstart, vsyncend, vblankend, vtotal; 351 352 /* Unlock the DC registers */ 353 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); 354 355 lx_graphics_disable(info); 356 357 lx_set_clock(info); 358 359 /* Set output mode */ 360 361 rdmsrl(MSR_LX_GLD_MSR_CONFIG, msrval); 362 msrval &= ~MSR_LX_GLD_MSR_CONFIG_FMT; 363 364 if (par->output & OUTPUT_PANEL) { 365 msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_FP; 366 367 if (par->output & OUTPUT_CRT) 368 msrval |= MSR_LX_GLD_MSR_CONFIG_FPC; 369 else 370 msrval &= ~MSR_LX_GLD_MSR_CONFIG_FPC; 371 } else 372 msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_CRT; 373 374 wrmsrl(MSR_LX_GLD_MSR_CONFIG, msrval); 375 376 /* Clear the various buffers */ 377 /* FIXME: Adjust for panning here */ 378 379 write_dc(par, DC_FB_ST_OFFSET, 0); 380 write_dc(par, DC_CB_ST_OFFSET, 0); 381 write_dc(par, DC_CURS_ST_OFFSET, 0); 382 383 /* FIXME: Add support for interlacing */ 384 /* FIXME: Add support for scaling */ 385 386 val = read_dc(par, DC_GENLK_CTL); 387 val &= ~(DC_GENLK_CTL_ALPHA_FLICK_EN | DC_GENLK_CTL_FLICK_EN | 388 DC_GENLK_CTL_FLICK_SEL_MASK); 389 390 /* Default scaling params */ 391 392 write_dc(par, DC_GFX_SCALE, (0x4000 << 16) | 0x4000); 393 write_dc(par, DC_IRQ_FILT_CTL, 0); 394 write_dc(par, DC_GENLK_CTL, val); 395 396 /* FIXME: Support compression */ 397 398 if (info->fix.line_length > 4096) 399 dv = DC_DV_CTL_DV_LINE_SIZE_8K; 400 else if (info->fix.line_length > 2048) 401 dv = DC_DV_CTL_DV_LINE_SIZE_4K; 402 else if (info->fix.line_length > 1024) 403 dv = DC_DV_CTL_DV_LINE_SIZE_2K; 404 else 405 dv = DC_DV_CTL_DV_LINE_SIZE_1K; 406 407 max = info->fix.line_length * info->var.yres; 408 max = (max + 0x3FF) & 0xFFFFFC00; 409 410 write_dc(par, DC_DV_TOP, max | DC_DV_TOP_DV_TOP_EN); 411 412 val = read_dc(par, DC_DV_CTL) & ~DC_DV_CTL_DV_LINE_SIZE; 413 write_dc(par, DC_DV_CTL, val | dv); 414 415 size = info->var.xres * (info->var.bits_per_pixel >> 3); 416 417 write_dc(par, DC_GFX_PITCH, info->fix.line_length >> 3); 418 write_dc(par, DC_LINE_SIZE, (size + 7) >> 3); 419 420 /* Set default watermark values */ 421 422 rdmsrl(MSR_LX_SPARE_MSR, msrval); 423 424 msrval &= ~(MSR_LX_SPARE_MSR_DIS_CFIFO_HGO 425 | MSR_LX_SPARE_MSR_VFIFO_ARB_SEL 426 | MSR_LX_SPARE_MSR_LOAD_WM_LPEN_M 427 | MSR_LX_SPARE_MSR_WM_LPEN_OVRD); 428 msrval |= MSR_LX_SPARE_MSR_DIS_VIFO_WM | 429 MSR_LX_SPARE_MSR_DIS_INIT_V_PRI; 430 wrmsrl(MSR_LX_SPARE_MSR, msrval); 431 432 gcfg = DC_GENERAL_CFG_DFLE; /* Display fifo enable */ 433 gcfg |= (0x6 << DC_GENERAL_CFG_DFHPSL_SHIFT) | /* default priority */ 434 (0xb << DC_GENERAL_CFG_DFHPEL_SHIFT); 435 gcfg |= DC_GENERAL_CFG_FDTY; /* Set the frame dirty mode */ 436 437 dcfg = DC_DISPLAY_CFG_VDEN; /* Enable video data */ 438 dcfg |= DC_DISPLAY_CFG_GDEN; /* Enable graphics */ 439 dcfg |= DC_DISPLAY_CFG_TGEN; /* Turn on the timing generator */ 440 dcfg |= DC_DISPLAY_CFG_TRUP; /* Update timings immediately */ 441 dcfg |= DC_DISPLAY_CFG_PALB; /* Palette bypass in > 8 bpp modes */ 442 dcfg |= DC_DISPLAY_CFG_VISL; 443 dcfg |= DC_DISPLAY_CFG_DCEN; /* Always center the display */ 444 445 /* Set the current BPP mode */ 446 447 switch (info->var.bits_per_pixel) { 448 case 8: 449 dcfg |= DC_DISPLAY_CFG_DISP_MODE_8BPP; 450 break; 451 452 case 16: 453 dcfg |= DC_DISPLAY_CFG_DISP_MODE_16BPP; 454 break; 455 456 case 32: 457 case 24: 458 dcfg |= DC_DISPLAY_CFG_DISP_MODE_24BPP; 459 break; 460 } 461 462 /* Now - set up the timings */ 463 464 hactive = info->var.xres; 465 hblankstart = hactive; 466 hsyncstart = hblankstart + info->var.right_margin; 467 hsyncend = hsyncstart + info->var.hsync_len; 468 hblankend = hsyncend + info->var.left_margin; 469 htotal = hblankend; 470 471 vactive = info->var.yres; 472 vblankstart = vactive; 473 vsyncstart = vblankstart + info->var.lower_margin; 474 vsyncend = vsyncstart + info->var.vsync_len; 475 vblankend = vsyncend + info->var.upper_margin; 476 vtotal = vblankend; 477 478 write_dc(par, DC_H_ACTIVE_TIMING, (hactive - 1) | ((htotal - 1) << 16)); 479 write_dc(par, DC_H_BLANK_TIMING, 480 (hblankstart - 1) | ((hblankend - 1) << 16)); 481 write_dc(par, DC_H_SYNC_TIMING, 482 (hsyncstart - 1) | ((hsyncend - 1) << 16)); 483 484 write_dc(par, DC_V_ACTIVE_TIMING, (vactive - 1) | ((vtotal - 1) << 16)); 485 write_dc(par, DC_V_BLANK_TIMING, 486 (vblankstart - 1) | ((vblankend - 1) << 16)); 487 write_dc(par, DC_V_SYNC_TIMING, 488 (vsyncstart - 1) | ((vsyncend - 1) << 16)); 489 490 write_dc(par, DC_FB_ACTIVE, 491 (info->var.xres - 1) << 16 | (info->var.yres - 1)); 492 493 /* And re-enable the graphics output */ 494 lx_graphics_enable(info); 495 496 /* Write the two main configuration registers */ 497 write_dc(par, DC_DISPLAY_CFG, dcfg); 498 write_dc(par, DC_ARB_CFG, 0); 499 write_dc(par, DC_GENERAL_CFG, gcfg); 500 501 /* Lock the DC registers */ 502 write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK); 503 } 504 505 void lx_set_palette_reg(struct fb_info *info, unsigned regno, 506 unsigned red, unsigned green, unsigned blue) 507 { 508 struct lxfb_par *par = info->par; 509 int val; 510 511 /* Hardware palette is in RGB 8-8-8 format. */ 512 513 val = (red << 8) & 0xff0000; 514 val |= (green) & 0x00ff00; 515 val |= (blue >> 8) & 0x0000ff; 516 517 write_dc(par, DC_PAL_ADDRESS, regno); 518 write_dc(par, DC_PAL_DATA, val); 519 } 520 521 int lx_blank_display(struct fb_info *info, int blank_mode) 522 { 523 struct lxfb_par *par = info->par; 524 u32 dcfg, misc, fp_pm; 525 int blank, hsync, vsync; 526 527 /* CRT power saving modes. */ 528 switch (blank_mode) { 529 case FB_BLANK_UNBLANK: 530 blank = 0; hsync = 1; vsync = 1; 531 break; 532 case FB_BLANK_NORMAL: 533 blank = 1; hsync = 1; vsync = 1; 534 break; 535 case FB_BLANK_VSYNC_SUSPEND: 536 blank = 1; hsync = 1; vsync = 0; 537 break; 538 case FB_BLANK_HSYNC_SUSPEND: 539 blank = 1; hsync = 0; vsync = 1; 540 break; 541 case FB_BLANK_POWERDOWN: 542 blank = 1; hsync = 0; vsync = 0; 543 break; 544 default: 545 return -EINVAL; 546 } 547 548 dcfg = read_vp(par, VP_DCFG); 549 dcfg &= ~(VP_DCFG_DAC_BL_EN | VP_DCFG_HSYNC_EN | VP_DCFG_VSYNC_EN | 550 VP_DCFG_CRT_EN); 551 if (!blank) 552 dcfg |= VP_DCFG_DAC_BL_EN | VP_DCFG_CRT_EN; 553 if (hsync) 554 dcfg |= VP_DCFG_HSYNC_EN; 555 if (vsync) 556 dcfg |= VP_DCFG_VSYNC_EN; 557 558 write_vp(par, VP_DCFG, dcfg); 559 560 misc = read_vp(par, VP_MISC); 561 562 if (vsync && hsync) 563 misc &= ~VP_MISC_DACPWRDN; 564 else 565 misc |= VP_MISC_DACPWRDN; 566 567 write_vp(par, VP_MISC, misc); 568 569 /* Power on/off flat panel */ 570 571 if (par->output & OUTPUT_PANEL) { 572 fp_pm = read_fp(par, FP_PM); 573 if (blank_mode == FB_BLANK_POWERDOWN) 574 fp_pm &= ~FP_PM_P; 575 else 576 fp_pm |= FP_PM_P; 577 write_fp(par, FP_PM, fp_pm); 578 } 579 580 return 0; 581 } 582 583 static void lx_save_regs(struct lxfb_par *par) 584 { 585 uint32_t filt; 586 int i; 587 588 /* wait for the BLT engine to stop being busy */ 589 do { 590 i = read_gp(par, GP_BLT_STATUS); 591 } while ((i & GP_BLT_STATUS_PB) || !(i & GP_BLT_STATUS_CE)); 592 593 /* save MSRs */ 594 rdmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel); 595 rdmsrl(MSR_GLCP_DOTPLL, par->msr.dotpll); 596 rdmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg); 597 rdmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare); 598 599 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); 600 601 /* save registers */ 602 memcpy(par->gp, par->gp_regs, sizeof(par->gp)); 603 memcpy(par->dc, par->dc_regs, sizeof(par->dc)); 604 memcpy(par->vp, par->vp_regs, sizeof(par->vp)); 605 memcpy(par->fp, par->vp_regs + VP_FP_START, sizeof(par->fp)); 606 607 /* save the display controller palette */ 608 write_dc(par, DC_PAL_ADDRESS, 0); 609 for (i = 0; i < ARRAY_SIZE(par->dc_pal); i++) 610 par->dc_pal[i] = read_dc(par, DC_PAL_DATA); 611 612 /* save the video processor palette */ 613 write_vp(par, VP_PAR, 0); 614 for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++) 615 par->vp_pal[i] = read_vp(par, VP_PDR); 616 617 /* save the horizontal filter coefficients */ 618 filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL; 619 for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) { 620 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); 621 par->hcoeff[i] = read_dc(par, DC_FILT_COEFF1); 622 par->hcoeff[i + 1] = read_dc(par, DC_FILT_COEFF2); 623 } 624 625 /* save the vertical filter coefficients */ 626 filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL; 627 for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) { 628 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); 629 par->vcoeff[i] = read_dc(par, DC_FILT_COEFF1); 630 } 631 632 /* save video coeff ram */ 633 memcpy(par->vp_coeff, par->vp_regs + VP_VCR, sizeof(par->vp_coeff)); 634 } 635 636 static void lx_restore_gfx_proc(struct lxfb_par *par) 637 { 638 int i; 639 640 /* a bunch of registers require GP_RASTER_MODE to be set first */ 641 write_gp(par, GP_RASTER_MODE, par->gp[GP_RASTER_MODE]); 642 643 for (i = 0; i < ARRAY_SIZE(par->gp); i++) { 644 switch (i) { 645 case GP_RASTER_MODE: 646 case GP_VECTOR_MODE: 647 case GP_BLT_MODE: 648 case GP_BLT_STATUS: 649 case GP_HST_SRC: 650 /* FIXME: restore LUT data */ 651 case GP_LUT_INDEX: 652 case GP_LUT_DATA: 653 /* don't restore these registers */ 654 break; 655 656 default: 657 write_gp(par, i, par->gp[i]); 658 } 659 } 660 } 661 662 static void lx_restore_display_ctlr(struct lxfb_par *par) 663 { 664 uint32_t filt; 665 int i; 666 667 wrmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare); 668 669 for (i = 0; i < ARRAY_SIZE(par->dc); i++) { 670 switch (i) { 671 case DC_UNLOCK: 672 /* unlock the DC; runs first */ 673 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); 674 break; 675 676 case DC_GENERAL_CFG: 677 case DC_DISPLAY_CFG: 678 /* disable all while restoring */ 679 write_dc(par, i, 0); 680 break; 681 682 case DC_DV_CTL: 683 /* set all ram to dirty */ 684 write_dc(par, i, par->dc[i] | DC_DV_CTL_CLEAR_DV_RAM); 685 break; 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->dc_pal); i++) 710 write_dc(par, DC_PAL_DATA, par->dc_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 processor palette */ 755 write_vp(par, VP_PAR, 0); 756 for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++) 757 write_vp(par, VP_PDR, par->vp_pal[i]); 758 759 /* restore video coeff ram */ 760 memcpy(par->vp_regs + VP_VCR, par->vp_coeff, sizeof(par->vp_coeff)); 761 } 762 763 static void lx_restore_regs(struct lxfb_par *par) 764 { 765 int i; 766 767 lx_set_dotpll((u32) (par->msr.dotpll >> 32)); 768 lx_restore_gfx_proc(par); 769 lx_restore_display_ctlr(par); 770 lx_restore_video_proc(par); 771 772 /* Flat Panel */ 773 for (i = 0; i < ARRAY_SIZE(par->fp); i++) { 774 switch (i) { 775 case FP_PM: 776 case FP_RSVD_0: 777 case FP_RSVD_1: 778 case FP_RSVD_2: 779 case FP_RSVD_3: 780 case FP_RSVD_4: 781 /* don't restore these registers */ 782 break; 783 784 default: 785 write_fp(par, i, par->fp[i]); 786 } 787 } 788 789 /* control the panel */ 790 if (par->fp[FP_PM] & FP_PM_P) { 791 /* power on the panel if not already power{ed,ing} on */ 792 if (!(read_fp(par, FP_PM) & 793 (FP_PM_PANEL_ON|FP_PM_PANEL_PWR_UP))) 794 write_fp(par, FP_PM, par->fp[FP_PM]); 795 } else { 796 /* power down the panel if not already power{ed,ing} down */ 797 if (!(read_fp(par, FP_PM) & 798 (FP_PM_PANEL_OFF|FP_PM_PANEL_PWR_DOWN))) 799 write_fp(par, FP_PM, par->fp[FP_PM]); 800 } 801 802 /* turn everything on */ 803 write_vp(par, VP_VCFG, par->vp[VP_VCFG]); 804 write_vp(par, VP_DCFG, par->vp[VP_DCFG]); 805 write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG]); 806 /* do this last; it will enable the FIFO load */ 807 write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG]); 808 809 /* lock the door behind us */ 810 write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK); 811 } 812 813 int lx_powerdown(struct fb_info *info) 814 { 815 struct lxfb_par *par = info->par; 816 817 if (par->powered_down) 818 return 0; 819 820 lx_save_regs(par); 821 lx_graphics_disable(info); 822 823 par->powered_down = 1; 824 return 0; 825 } 826 827 int lx_powerup(struct fb_info *info) 828 { 829 struct lxfb_par *par = info->par; 830 831 if (!par->powered_down) 832 return 0; 833 834 lx_restore_regs(par); 835 836 par->powered_down = 0; 837 return 0; 838 } 839