tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
34static 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
128static 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
164static 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
184static 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
249static 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
314unsigned 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
345void 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
509void 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
525int 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
589static 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
637static 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
663static 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
728static 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
758static 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
808int 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
822int 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