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[pohmelfs.git] / drivers / video / mbx / mbxfb.c
blob55bf6196b7a0e1185c6237df1f3b4baae5f7cb97
1 /*
2 * linux/drivers/video/mbx/mbxfb.c
3 *
4 * Copyright (C) 2006-2007 8D Technologies inc
5 * Raphael Assenat <raph@8d.com>
6 * - Added video overlay support
7 * - Various improvements
8 *
9 * Copyright (C) 2006 Compulab, Ltd.
10 * Mike Rapoport <mike@compulab.co.il>
11 * - Creation of driver
12 *
13 * Based on pxafb.c
14 *
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file COPYING in the main directory of this archive for
17 * more details.
18 *
19 * Intel 2700G (Marathon) Graphics Accelerator Frame Buffer Driver
20 *
21 */
22
23 #include <linux/delay.h>
24 #include <linux/fb.h>
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/platform_device.h>
28 #include <linux/uaccess.h>
29
30 #include <asm/io.h>
31
32 #include <video/mbxfb.h>
33
34 #include "regs.h"
35 #include "reg_bits.h"
36
37 static void __iomem *virt_base_2700;
38
39 #define write_reg(val, reg) do { writel((val), (reg)); } while(0)
40
41 /* Without this delay, the graphics appears somehow scaled and
42 * there is a lot of jitter in scanlines. This delay is probably
43 * needed only after setting some specific register(s) somewhere,
44 * not all over the place... */
45 #define write_reg_dly(val, reg) do { writel((val), reg); udelay(1000); } while(0)
46
47 #define MIN_XRES 16
48 #define MIN_YRES 16
49 #define MAX_XRES 2048
50 #define MAX_YRES 2048
51
52 #define MAX_PALETTES 16
53
54 /* FIXME: take care of different chip revisions with different sizes
55 of ODFB */
56 #define MEMORY_OFFSET 0x60000
57
58 struct mbxfb_info {
59 struct device *dev;
60
61 struct resource *fb_res;
62 struct resource *fb_req;
63
64 struct resource *reg_res;
65 struct resource *reg_req;
66
67 void __iomem *fb_virt_addr;
68 unsigned long fb_phys_addr;
69
70 void __iomem *reg_virt_addr;
71 unsigned long reg_phys_addr;
72
73 int (*platform_probe) (struct fb_info * fb);
74 int (*platform_remove) (struct fb_info * fb);
75
76 u32 pseudo_palette[MAX_PALETTES];
77 #ifdef CONFIG_FB_MBX_DEBUG
78 void *debugfs_data;
79 #endif
80
81 };
82
83 static struct fb_var_screeninfo mbxfb_default __devinitdata = {
84 .xres = 640,
85 .yres = 480,
86 .xres_virtual = 640,
87 .yres_virtual = 480,
88 .bits_per_pixel = 16,
89 .red = {11, 5, 0},
90 .green = {5, 6, 0},
91 .blue = {0, 5, 0},
92 .activate = FB_ACTIVATE_TEST,
93 .height = -1,
94 .width = -1,
95 .pixclock = 40000,
96 .left_margin = 48,
97 .right_margin = 16,
98 .upper_margin = 33,
99 .lower_margin = 10,
100 .hsync_len = 96,
101 .vsync_len = 2,
102 .vmode = FB_VMODE_NONINTERLACED,
103 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
104 };
105
106 static struct fb_fix_screeninfo mbxfb_fix __devinitdata = {
107 .id = "MBX",
108 .type = FB_TYPE_PACKED_PIXELS,
109 .visual = FB_VISUAL_TRUECOLOR,
110 .xpanstep = 0,
111 .ypanstep = 0,
112 .ywrapstep = 0,
113 .accel = FB_ACCEL_NONE,
114 };
115
116 struct pixclock_div {
117 u8 m;
118 u8 n;
119 u8 p;
120 };
121
122 static unsigned int mbxfb_get_pixclock(unsigned int pixclock_ps,
123 struct pixclock_div *div)
124 {
125 u8 m, n, p;
126 unsigned int err = 0;
127 unsigned int min_err = ~0x0;
128 unsigned int clk;
129 unsigned int best_clk = 0;
130 unsigned int ref_clk = 13000; /* FIXME: take from platform data */
131 unsigned int pixclock;
132
133 /* convert pixclock to KHz */
134 pixclock = PICOS2KHZ(pixclock_ps);
135
136 /* PLL output freq = (ref_clk * M) / (N * 2^P)
137 *
138 * M: 1 to 63
139 * N: 1 to 7
140 * P: 0 to 7
141 */
142
143 /* RAPH: When N==1, the resulting pixel clock appears to
144 * get divided by 2. Preventing N=1 by starting the following
145 * loop at 2 prevents this. Is this a bug with my chip
146 * revision or something I dont understand? */
147 for (m = 1; m < 64; m++) {
148 for (n = 2; n < 8; n++) {
149 for (p = 0; p < 8; p++) {
150 clk = (ref_clk * m) / (n * (1 << p));
151 err = (clk > pixclock) ? (clk - pixclock) :
152 (pixclock - clk);
153 if (err < min_err) {
154 min_err = err;
155 best_clk = clk;
156 div->m = m;
157 div->n = n;
158 div->p = p;
159 }
160 }
161 }
162 }
163 return KHZ2PICOS(best_clk);
164 }
165
166 static int mbxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
167 u_int trans, struct fb_info *info)
168 {
169 u32 val, ret = 1;
170
171 if (regno < MAX_PALETTES) {
172 u32 *pal = info->pseudo_palette;
173
174 val = (red & 0xf800) | ((green & 0xfc00) >> 5) |
175 ((blue & 0xf800) >> 11);
176 pal[regno] = val;
177 ret = 0;
178 }
179
180 return ret;
181 }
182
183 static int mbxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
184 {
185 struct pixclock_div div;
186
187 var->pixclock = mbxfb_get_pixclock(var->pixclock, &div);
188
189 if (var->xres < MIN_XRES)
190 var->xres = MIN_XRES;
191 if (var->yres < MIN_YRES)
192 var->yres = MIN_YRES;
193 if (var->xres > MAX_XRES)
194 return -EINVAL;
195 if (var->yres > MAX_YRES)
196 return -EINVAL;
197 var->xres_virtual = max(var->xres_virtual, var->xres);
198 var->yres_virtual = max(var->yres_virtual, var->yres);
199
200 switch (var->bits_per_pixel) {
201 /* 8 bits-per-pixel is not supported yet */
202 case 8:
203 return -EINVAL;
204 case 16:
205 var->green.length = (var->green.length == 5) ? 5 : 6;
206 var->red.length = 5;
207 var->blue.length = 5;
208 var->transp.length = 6 - var->green.length;
209 var->blue.offset = 0;
210 var->green.offset = 5;
211 var->red.offset = 5 + var->green.length;
212 var->transp.offset = (5 + var->red.offset) & 15;
213 break;
214 case 24: /* RGB 888 */
215 case 32: /* RGBA 8888 */
216 var->red.offset = 16;
217 var->red.length = 8;
218 var->green.offset = 8;
219 var->green.length = 8;
220 var->blue.offset = 0;
221 var->blue.length = 8;
222 var->transp.length = var->bits_per_pixel - 24;
223 var->transp.offset = (var->transp.length) ? 24 : 0;
224 break;
225 }
226 var->red.msb_right = 0;
227 var->green.msb_right = 0;
228 var->blue.msb_right = 0;
229 var->transp.msb_right = 0;
230
231 return 0;
232 }
233
234 static int mbxfb_set_par(struct fb_info *info)
235 {
236 struct fb_var_screeninfo *var = &info->var;
237 struct pixclock_div div;
238 ushort hbps, ht, hfps, has;
239 ushort vbps, vt, vfps, vas;
240 u32 gsctrl = readl(GSCTRL);
241 u32 gsadr = readl(GSADR);
242
243 info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
244
245 /* setup color mode */
246 gsctrl &= ~(FMsk(GSCTRL_GPIXFMT));
247 /* FIXME: add *WORKING* support for 8-bits per color */
248 if (info->var.bits_per_pixel == 8) {
249 return -EINVAL;
250 } else {
251 fb_dealloc_cmap(&info->cmap);
252 gsctrl &= ~GSCTRL_LUT_EN;
253
254 info->fix.visual = FB_VISUAL_TRUECOLOR;
255 switch (info->var.bits_per_pixel) {
256 case 16:
257 if (info->var.green.length == 5)
258 gsctrl |= GSCTRL_GPIXFMT_ARGB1555;
259 else
260 gsctrl |= GSCTRL_GPIXFMT_RGB565;
261 break;
262 case 24:
263 gsctrl |= GSCTRL_GPIXFMT_RGB888;
264 break;
265 case 32:
266 gsctrl |= GSCTRL_GPIXFMT_ARGB8888;
267 break;
268 }
269 }
270
271 /* setup resolution */
272 gsctrl &= ~(FMsk(GSCTRL_GSWIDTH) | FMsk(GSCTRL_GSHEIGHT));
273 gsctrl |= Gsctrl_Width(info->var.xres) |
274 Gsctrl_Height(info->var.yres);
275 write_reg_dly(gsctrl, GSCTRL);
276
277 gsadr &= ~(FMsk(GSADR_SRCSTRIDE));
278 gsadr |= Gsadr_Srcstride(info->var.xres * info->var.bits_per_pixel /
279 (8 * 16) - 1);
280 write_reg_dly(gsadr, GSADR);
281
282 /* setup timings */
283 var->pixclock = mbxfb_get_pixclock(info->var.pixclock, &div);
284
285 write_reg_dly((Disp_Pll_M(div.m) | Disp_Pll_N(div.n) |
286 Disp_Pll_P(div.p) | DISP_PLL_EN), DISPPLL);
287
288 hbps = var->hsync_len;
289 has = hbps + var->left_margin;
290 hfps = has + var->xres;
291 ht = hfps + var->right_margin;
292
293 vbps = var->vsync_len;
294 vas = vbps + var->upper_margin;
295 vfps = vas + var->yres;
296 vt = vfps + var->lower_margin;
297
298 write_reg_dly((Dht01_Hbps(hbps) | Dht01_Ht(ht)), DHT01);
299 write_reg_dly((Dht02_Hlbs(has) | Dht02_Has(has)), DHT02);
300 write_reg_dly((Dht03_Hfps(hfps) | Dht03_Hrbs(hfps)), DHT03);
301 write_reg_dly((Dhdet_Hdes(has) | Dhdet_Hdef(hfps)), DHDET);
302
303 write_reg_dly((Dvt01_Vbps(vbps) | Dvt01_Vt(vt)), DVT01);
304 write_reg_dly((Dvt02_Vtbs(vas) | Dvt02_Vas(vas)), DVT02);
305 write_reg_dly((Dvt03_Vfps(vfps) | Dvt03_Vbbs(vfps)), DVT03);
306 write_reg_dly((Dvdet_Vdes(vas) | Dvdet_Vdef(vfps)), DVDET);
307 write_reg_dly((Dvectrl_Vevent(vfps) | Dvectrl_Vfetch(vbps)), DVECTRL);
308
309 write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
310
311 write_reg_dly(DINTRE_VEVENT0_EN, DINTRE);
312
313 return 0;
314 }
315
316 static int mbxfb_blank(int blank, struct fb_info *info)
317 {
318 switch (blank) {
319 case FB_BLANK_POWERDOWN:
320 case FB_BLANK_VSYNC_SUSPEND:
321 case FB_BLANK_HSYNC_SUSPEND:
322 case FB_BLANK_NORMAL:
323 write_reg_dly((readl(DSCTRL) & ~DSCTRL_SYNCGEN_EN), DSCTRL);
324 write_reg_dly((readl(PIXCLK) & ~PIXCLK_EN), PIXCLK);
325 write_reg_dly((readl(VOVRCLK) & ~VOVRCLK_EN), VOVRCLK);
326 break;
327 case FB_BLANK_UNBLANK:
328 write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
329 write_reg_dly((readl(PIXCLK) | PIXCLK_EN), PIXCLK);
330 break;
331 }
332 return 0;
333 }
334
335 static int mbxfb_setupOverlay(struct mbxfb_overlaySetup *set)
336 {
337 u32 vsctrl, vscadr, vsadr;
338 u32 sssize, spoctrl, shctrl;
339 u32 vubase, vvbase;
340 u32 vovrclk;
341
342 if (set->scaled_width==0 || set->scaled_height==0)
343 return -EINVAL;
344
345 /* read registers which have reserved bits
346 * so we can write them back as-is. */
347 vovrclk = readl(VOVRCLK);
348 vsctrl = readl(VSCTRL);
349 vscadr = readl(VSCADR);
350 vubase = readl(VUBASE);
351 vvbase = readl(VVBASE);
352 shctrl = readl(SHCTRL);
353
354 spoctrl = readl(SPOCTRL);
355 sssize = readl(SSSIZE);
356
357 vsctrl &= ~( FMsk(VSCTRL_VSWIDTH) |
358 FMsk(VSCTRL_VSHEIGHT) |
359 FMsk(VSCTRL_VPIXFMT) |
360 VSCTRL_GAMMA_EN | VSCTRL_CSC_EN |
361 VSCTRL_COSITED );
362 vsctrl |= Vsctrl_Width(set->width) | Vsctrl_Height(set->height) |
363 VSCTRL_CSC_EN;
364
365 vscadr &= ~(VSCADR_STR_EN | FMsk(VSCADR_VBASE_ADR) );
366 vubase &= ~(VUBASE_UVHALFSTR | FMsk(VUBASE_UBASE_ADR));
367 vvbase &= ~(FMsk(VVBASE_VBASE_ADR));
368
369 switch (set->fmt) {
370 case MBXFB_FMT_YUV16:
371 vsctrl |= VSCTRL_VPIXFMT_YUV12;
372
373 set->Y_stride = ((set->width) + 0xf ) & ~0xf;
374 break;
375 case MBXFB_FMT_YUV12:
376 vsctrl |= VSCTRL_VPIXFMT_YUV12;
377
378 set->Y_stride = ((set->width) + 0xf ) & ~0xf;
379 vubase |= VUBASE_UVHALFSTR;
380
381 break;
382 case MBXFB_FMT_UY0VY1:
383 vsctrl |= VSCTRL_VPIXFMT_UY0VY1;
384 set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
385 break;
386 case MBXFB_FMT_VY0UY1:
387 vsctrl |= VSCTRL_VPIXFMT_VY0UY1;
388 set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
389 break;
390 case MBXFB_FMT_Y0UY1V:
391 vsctrl |= VSCTRL_VPIXFMT_Y0UY1V;
392 set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
393 break;
394 case MBXFB_FMT_Y0VY1U:
395 vsctrl |= VSCTRL_VPIXFMT_Y0VY1U;
396 set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
397 break;
398 default:
399 return -EINVAL;
400 }
401
402 /* VSCTRL has the bits which sets the Video Pixel Format.
403 * When passing from a packed to planar format,
404 * if we write VSCTRL first, VVBASE and VUBASE would
405 * be zero if we would not set them here. (And then,
406 * the chips hangs and only a reset seems to fix it).
407 *
408 * If course, the values calculated here have no meaning
409 * for packed formats.
410 */
411 set->UV_stride = ((set->width/2) + 0x7 ) & ~0x7;
412 set->U_offset = set->height * set->Y_stride;
413 set->V_offset = set->U_offset +
414 set->height * set->UV_stride;
415 vubase |= Vubase_Ubase_Adr(
416 (0x60000 + set->mem_offset + set->U_offset)>>3);
417 vvbase |= Vvbase_Vbase_Adr(
418 (0x60000 + set->mem_offset + set->V_offset)>>3);
419
420
421 vscadr |= Vscadr_Vbase_Adr((0x60000 + set->mem_offset)>>4);
422
423 if (set->enable)
424 vscadr |= VSCADR_STR_EN;
425
426
427 vsadr = Vsadr_Srcstride((set->Y_stride)/16-1) |
428 Vsadr_Xstart(set->x) | Vsadr_Ystart(set->y);
429
430 sssize &= ~(FMsk(SSSIZE_SC_WIDTH) | FMsk(SSSIZE_SC_HEIGHT));
431 sssize = Sssize_Sc_Width(set->scaled_width-1) |
432 Sssize_Sc_Height(set->scaled_height-1);
433
434 spoctrl &= ~(SPOCTRL_H_SC_BP | SPOCTRL_V_SC_BP |
435 SPOCTRL_HV_SC_OR | SPOCTRL_VS_UR_C |
436 FMsk(SPOCTRL_VPITCH));
437 spoctrl |= Spoctrl_Vpitch((set->height<<11)/set->scaled_height);
438
439 /* Bypass horiz/vert scaler when same size */
440 if (set->scaled_width == set->width)
441 spoctrl |= SPOCTRL_H_SC_BP;
442 if (set->scaled_height == set->height)
443 spoctrl |= SPOCTRL_V_SC_BP;
444
445 shctrl &= ~(FMsk(SHCTRL_HPITCH) | SHCTRL_HDECIM);
446 shctrl |= Shctrl_Hpitch((set->width<<11)/set->scaled_width);
447
448 /* Video plane registers */
449 write_reg(vsctrl, VSCTRL);
450 write_reg(vscadr, VSCADR);
451 write_reg(vubase, VUBASE);
452 write_reg(vvbase, VVBASE);
453 write_reg(vsadr, VSADR);
454
455 /* Video scaler registers */
456 write_reg(sssize, SSSIZE);
457 write_reg(spoctrl, SPOCTRL);
458 write_reg(shctrl, SHCTRL);
459
460 /* Clock */
461 if (set->enable)
462 vovrclk |= 1;
463 else
464 vovrclk &= ~1;
465
466 write_reg(vovrclk, VOVRCLK);
467
468 return 0;
469 }
470
471 static int mbxfb_ioctl_planeorder(struct mbxfb_planeorder *porder)
472 {
473 unsigned long gscadr, vscadr;
474
475 if (porder->bottom == porder->top)
476 return -EINVAL;
477
478 gscadr = readl(GSCADR);
479 vscadr = readl(VSCADR);
480
481 gscadr &= ~(FMsk(GSCADR_BLEND_POS));
482 vscadr &= ~(FMsk(VSCADR_BLEND_POS));
483
484 switch (porder->bottom) {
485 case MBXFB_PLANE_GRAPHICS:
486 gscadr |= GSCADR_BLEND_GFX;
487 break;
488 case MBXFB_PLANE_VIDEO:
489 vscadr |= VSCADR_BLEND_GFX;
490 break;
491 default:
492 return -EINVAL;
493 }
494
495 switch (porder->top) {
496 case MBXFB_PLANE_GRAPHICS:
497 gscadr |= GSCADR_BLEND_VID;
498 break;
499 case MBXFB_PLANE_VIDEO:
500 vscadr |= GSCADR_BLEND_VID;
501 break;
502 default:
503 return -EINVAL;
504 }
505
506 write_reg_dly(vscadr, VSCADR);
507 write_reg_dly(gscadr, GSCADR);
508
509 return 0;
510
511 }
512
513 static int mbxfb_ioctl_alphactl(struct mbxfb_alphaCtl *alpha)
514 {
515 unsigned long vscadr, vbbase, vcmsk;
516 unsigned long gscadr, gbbase, gdrctrl;
517
518 vbbase = Vbbase_Glalpha(alpha->overlay_global_alpha) |
519 Vbbase_Colkey(alpha->overlay_colorkey);
520
521 gbbase = Gbbase_Glalpha(alpha->graphics_global_alpha) |
522 Gbbase_Colkey(alpha->graphics_colorkey);
523
524 vcmsk = readl(VCMSK);
525 vcmsk &= ~(FMsk(VCMSK_COLKEY_M));
526 vcmsk |= Vcmsk_colkey_m(alpha->overlay_colorkey_mask);
527
528 gdrctrl = readl(GDRCTRL);
529 gdrctrl &= ~(FMsk(GDRCTRL_COLKEYM));
530 gdrctrl |= Gdrctrl_Colkeym(alpha->graphics_colorkey_mask);
531
532 vscadr = readl(VSCADR);
533 vscadr &= ~(FMsk(VSCADR_BLEND_M) | VSCADR_COLKEYSRC | VSCADR_COLKEY_EN);
534
535 gscadr = readl(GSCADR);
536 gscadr &= ~(FMsk(GSCADR_BLEND_M) | GSCADR_COLKEY_EN | GSCADR_COLKEYSRC);
537
538 switch (alpha->overlay_colorkey_mode) {
539 case MBXFB_COLORKEY_DISABLED:
540 break;
541 case MBXFB_COLORKEY_PREVIOUS:
542 vscadr |= VSCADR_COLKEY_EN;
543 break;
544 case MBXFB_COLORKEY_CURRENT:
545 vscadr |= VSCADR_COLKEY_EN | VSCADR_COLKEYSRC;
546 break;
547 default:
548 return -EINVAL;
549 }
550
551 switch (alpha->overlay_blend_mode) {
552 case MBXFB_ALPHABLEND_NONE:
553 vscadr |= VSCADR_BLEND_NONE;
554 break;
555 case MBXFB_ALPHABLEND_GLOBAL:
556 vscadr |= VSCADR_BLEND_GLOB;
557 break;
558 case MBXFB_ALPHABLEND_PIXEL:
559 vscadr |= VSCADR_BLEND_PIX;
560 break;
561 default:
562 return -EINVAL;
563 }
564
565 switch (alpha->graphics_colorkey_mode) {
566 case MBXFB_COLORKEY_DISABLED:
567 break;
568 case MBXFB_COLORKEY_PREVIOUS:
569 gscadr |= GSCADR_COLKEY_EN;
570 break;
571 case MBXFB_COLORKEY_CURRENT:
572 gscadr |= GSCADR_COLKEY_EN | GSCADR_COLKEYSRC;
573 break;
574 default:
575 return -EINVAL;
576 }
577
578 switch (alpha->graphics_blend_mode) {
579 case MBXFB_ALPHABLEND_NONE:
580 gscadr |= GSCADR_BLEND_NONE;
581 break;
582 case MBXFB_ALPHABLEND_GLOBAL:
583 gscadr |= GSCADR_BLEND_GLOB;
584 break;
585 case MBXFB_ALPHABLEND_PIXEL:
586 gscadr |= GSCADR_BLEND_PIX;
587 break;
588 default:
589 return -EINVAL;
590 }
591
592 write_reg_dly(vbbase, VBBASE);
593 write_reg_dly(gbbase, GBBASE);
594 write_reg_dly(vcmsk, VCMSK);
595 write_reg_dly(gdrctrl, GDRCTRL);
596 write_reg_dly(gscadr, GSCADR);
597 write_reg_dly(vscadr, VSCADR);
598
599 return 0;
600 }
601
602 static int mbxfb_ioctl(struct fb_info *info, unsigned int cmd,
603 unsigned long arg)
604 {
605 struct mbxfb_overlaySetup setup;
606 struct mbxfb_planeorder porder;
607 struct mbxfb_alphaCtl alpha;
608 struct mbxfb_reg reg;
609 int res;
610 __u32 tmp;
611
612 switch (cmd)
613 {
614 case MBXFB_IOCX_OVERLAY:
615 if (copy_from_user(&setup, (void __user*)arg,
616 sizeof(struct mbxfb_overlaySetup)))
617 return -EFAULT;
618
619 res = mbxfb_setupOverlay(&setup);
620 if (res)
621 return res;
622
623 if (copy_to_user((void __user*)arg, &setup,
624 sizeof(struct mbxfb_overlaySetup)))
625 return -EFAULT;
626
627 return 0;
628
629 case MBXFB_IOCS_PLANEORDER:
630 if (copy_from_user(&porder, (void __user*)arg,
631 sizeof(struct mbxfb_planeorder)))
632 return -EFAULT;
633
634 return mbxfb_ioctl_planeorder(&porder);
635
636 case MBXFB_IOCS_ALPHA:
637 if (copy_from_user(&alpha, (void __user*)arg,
638 sizeof(struct mbxfb_alphaCtl)))
639 return -EFAULT;
640
641 return mbxfb_ioctl_alphactl(&alpha);
642
643 case MBXFB_IOCS_REG:
644 if (copy_from_user(&reg, (void __user*)arg,
645 sizeof(struct mbxfb_reg)))
646 return -EFAULT;
647
648 if (reg.addr >= 0x10000) /* regs are from 0x3fe0000 to 0x3feffff */
649 return -EINVAL;
650
651 tmp = readl(virt_base_2700 + reg.addr);
652 tmp &= ~reg.mask;
653 tmp |= reg.val & reg.mask;
654 writel(tmp, virt_base_2700 + reg.addr);
655
656 return 0;
657 case MBXFB_IOCX_REG:
658 if (copy_from_user(&reg, (void __user*)arg,
659 sizeof(struct mbxfb_reg)))
660 return -EFAULT;
661
662 if (reg.addr >= 0x10000) /* regs are from 0x3fe0000 to 0x3feffff */
663 return -EINVAL;
664 reg.val = readl(virt_base_2700 + reg.addr);
665
666 if (copy_to_user((void __user*)arg, &reg,
667 sizeof(struct mbxfb_reg)))
668 return -EFAULT;
669
670 return 0;
671 }
672 return -EINVAL;
673 }
674
675 static struct fb_ops mbxfb_ops = {
676 .owner = THIS_MODULE,
677 .fb_check_var = mbxfb_check_var,
678 .fb_set_par = mbxfb_set_par,
679 .fb_setcolreg = mbxfb_setcolreg,
680 .fb_fillrect = cfb_fillrect,
681 .fb_copyarea = cfb_copyarea,
682 .fb_imageblit = cfb_imageblit,
683 .fb_blank = mbxfb_blank,
684 .fb_ioctl = mbxfb_ioctl,
685 };
686
687 /*
688 Enable external SDRAM controller. Assume that all clocks are active
689 by now.
690 */
691 static void __devinit setup_memc(struct fb_info *fbi)
692 {
693 unsigned long tmp;
694 int i;
695
696 /* FIXME: use platform specific parameters */
697 /* setup SDRAM controller */
698 write_reg_dly((LMCFG_LMC_DS | LMCFG_LMC_TS | LMCFG_LMD_TS |
699 LMCFG_LMA_TS),
700 LMCFG);
701
702 write_reg_dly(LMPWR_MC_PWR_ACT, LMPWR);
703
704 /* setup SDRAM timings */
705 write_reg_dly((Lmtim_Tras(7) | Lmtim_Trp(3) | Lmtim_Trcd(3) |
706 Lmtim_Trc(9) | Lmtim_Tdpl(2)),
707 LMTIM);
708 /* setup SDRAM refresh rate */
709 write_reg_dly(0xc2b, LMREFRESH);
710 /* setup SDRAM type parameters */
711 write_reg_dly((LMTYPE_CASLAT_3 | LMTYPE_BKSZ_2 | LMTYPE_ROWSZ_11 |
712 LMTYPE_COLSZ_8),
713 LMTYPE);
714 /* enable memory controller */
715 write_reg_dly(LMPWR_MC_PWR_ACT, LMPWR);
716 /* perform dummy reads */
717 for ( i = 0; i < 16; i++ ) {
718 tmp = readl(fbi->screen_base);
719 }
720 }
721
722 static void enable_clocks(struct fb_info *fbi)
723 {
724 /* enable clocks */
725 write_reg_dly(SYSCLKSRC_PLL_2, SYSCLKSRC);
726 write_reg_dly(PIXCLKSRC_PLL_1, PIXCLKSRC);
727 write_reg_dly(0x00000000, CLKSLEEP);
728
729 /* PLL output = (Frefclk * M) / (N * 2^P )
730 *
731 * M: 0x17, N: 0x3, P: 0x0 == 100 Mhz!
732 * M: 0xb, N: 0x1, P: 0x1 == 71 Mhz
733 * */
734 write_reg_dly((Core_Pll_M(0xb) | Core_Pll_N(0x1) | Core_Pll_P(0x1) |
735 CORE_PLL_EN),
736 COREPLL);
737
738 write_reg_dly((Disp_Pll_M(0x1b) | Disp_Pll_N(0x7) | Disp_Pll_P(0x1) |
739 DISP_PLL_EN),
740 DISPPLL);
741
742 write_reg_dly(0x00000000, VOVRCLK);
743 write_reg_dly(PIXCLK_EN, PIXCLK);
744 write_reg_dly(MEMCLK_EN, MEMCLK);
745 write_reg_dly(0x00000001, M24CLK);
746 write_reg_dly(0x00000001, MBXCLK);
747 write_reg_dly(SDCLK_EN, SDCLK);
748 write_reg_dly(0x00000001, PIXCLKDIV);
749 }
750
751 static void __devinit setup_graphics(struct fb_info *fbi)
752 {
753 unsigned long gsctrl;
754 unsigned long vscadr;
755
756 gsctrl = GSCTRL_GAMMA_EN | Gsctrl_Width(fbi->var.xres) |
757 Gsctrl_Height(fbi->var.yres);
758 switch (fbi->var.bits_per_pixel) {
759 case 16:
760 if (fbi->var.green.length == 5)
761 gsctrl |= GSCTRL_GPIXFMT_ARGB1555;
762 else
763 gsctrl |= GSCTRL_GPIXFMT_RGB565;
764 break;
765 case 24:
766 gsctrl |= GSCTRL_GPIXFMT_RGB888;
767 break;
768 case 32:
769 gsctrl |= GSCTRL_GPIXFMT_ARGB8888;
770 break;
771 }
772
773 write_reg_dly(gsctrl, GSCTRL);
774 write_reg_dly(0x00000000, GBBASE);
775 write_reg_dly(0x00ffffff, GDRCTRL);
776 write_reg_dly((GSCADR_STR_EN | Gscadr_Gbase_Adr(0x6000)), GSCADR);
777 write_reg_dly(0x00000000, GPLUT);
778
779 vscadr = readl(VSCADR);
780 vscadr &= ~(FMsk(VSCADR_BLEND_POS) | FMsk(VSCADR_BLEND_M));
781 vscadr |= VSCADR_BLEND_VID | VSCADR_BLEND_NONE;
782 write_reg_dly(vscadr, VSCADR);
783 }
784
785 static void __devinit setup_display(struct fb_info *fbi)
786 {
787 unsigned long dsctrl = 0;
788
789 dsctrl = DSCTRL_BLNK_POL;
790 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
791 dsctrl |= DSCTRL_HS_POL;
792 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
793 dsctrl |= DSCTRL_VS_POL;
794 write_reg_dly(dsctrl, DSCTRL);
795 write_reg_dly(0xd0303010, DMCTRL);
796 write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
797 }
798
799 static void __devinit enable_controller(struct fb_info *fbi)
800 {
801 u32 svctrl, shctrl;
802
803 write_reg_dly(SYSRST_RST, SYSRST);
804
805 /* setup a timeout, raise drive strength */
806 write_reg_dly(0xffffff0c, SYSCFG);
807
808 enable_clocks(fbi);
809 setup_memc(fbi);
810 setup_graphics(fbi);
811 setup_display(fbi);
812
813 shctrl = readl(SHCTRL);
814 shctrl &= ~(FMsk(SHCTRL_HINITIAL));
815 shctrl |= Shctrl_Hinitial(4<<11);
816 writel(shctrl, SHCTRL);
817
818 svctrl = Svctrl_Initial1(1<<10) | Svctrl_Initial2(1<<10);
819 writel(svctrl, SVCTRL);
820
821 writel(SPOCTRL_H_SC_BP | SPOCTRL_V_SC_BP | SPOCTRL_VORDER_4TAP
822 , SPOCTRL);
823
824 /* Those coefficients are good for scaling up. For scaling
825 * down, the application has to calculate them. */
826 write_reg(0xff000100, VSCOEFF0);
827 write_reg(0xfdfcfdfe, VSCOEFF1);
828 write_reg(0x170d0500, VSCOEFF2);
829 write_reg(0x3d372d22, VSCOEFF3);
830 write_reg(0x00000040, VSCOEFF4);
831
832 write_reg(0xff010100, HSCOEFF0);
833 write_reg(0x00000000, HSCOEFF1);
834 write_reg(0x02010000, HSCOEFF2);
835 write_reg(0x01020302, HSCOEFF3);
836 write_reg(0xf9fbfe00, HSCOEFF4);
837 write_reg(0xfbf7f6f7, HSCOEFF5);
838 write_reg(0x1c110700, HSCOEFF6);
839 write_reg(0x3e393127, HSCOEFF7);
840 write_reg(0x00000040, HSCOEFF8);
841
842 }
843
844 #ifdef CONFIG_PM
845 /*
846 * Power management hooks. Note that we won't be called from IRQ context,
847 * unlike the blank functions above, so we may sleep.
848 */
849 static int mbxfb_suspend(struct platform_device *dev, pm_message_t state)
850 {
851 /* make frame buffer memory enter self-refresh mode */
852 write_reg_dly(LMPWR_MC_PWR_SRM, LMPWR);
853 while (readl(LMPWRSTAT) != LMPWRSTAT_MC_PWR_SRM)
854 ; /* empty statement */
855
856 /* reset the device, since it's initial state is 'mostly sleeping' */
857 write_reg_dly(SYSRST_RST, SYSRST);
858 return 0;
859 }
860
861 static int mbxfb_resume(struct platform_device *dev)
862 {
863 struct fb_info *fbi = platform_get_drvdata(dev);
864
865 enable_clocks(fbi);
866 /* setup_graphics(fbi); */
867 /* setup_display(fbi); */
868
869 write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
870 return 0;
871 }
872 #else
873 #define mbxfb_suspend NULL
874 #define mbxfb_resume NULL
875 #endif
876
877 /* debugfs entries */
878 #ifndef CONFIG_FB_MBX_DEBUG
879 #define mbxfb_debugfs_init(x) do {} while(0)
880 #define mbxfb_debugfs_remove(x) do {} while(0)
881 #endif
882
883 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
884
885 static int __devinit mbxfb_probe(struct platform_device *dev)
886 {
887 int ret;
888 struct fb_info *fbi;
889 struct mbxfb_info *mfbi;
890 struct mbxfb_platform_data *pdata;
891
892 dev_dbg(&dev->dev, "mbxfb_probe\n");
893
894 pdata = dev->dev.platform_data;
895 if (!pdata) {
896 dev_err(&dev->dev, "platform data is required\n");
897 return -EINVAL;
898 }
899
900 fbi = framebuffer_alloc(sizeof(struct mbxfb_info), &dev->dev);
901 if (fbi == NULL) {
902 dev_err(&dev->dev, "framebuffer_alloc failed\n");
903 return -ENOMEM;
904 }
905
906 mfbi = fbi->par;
907 fbi->pseudo_palette = mfbi->pseudo_palette;
908
909
910 if (pdata->probe)
911 mfbi->platform_probe = pdata->probe;
912 if (pdata->remove)
913 mfbi->platform_remove = pdata->remove;
914
915 mfbi->fb_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
916 mfbi->reg_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
917
918 if (!mfbi->fb_res || !mfbi->reg_res) {
919 dev_err(&dev->dev, "no resources found\n");
920 ret = -ENODEV;
921 goto err1;
922 }
923
924 mfbi->fb_req = request_mem_region(mfbi->fb_res->start,
925 res_size(mfbi->fb_res), dev->name);
926 if (mfbi->fb_req == NULL) {
927 dev_err(&dev->dev, "failed to claim framebuffer memory\n");
928 ret = -EINVAL;
929 goto err1;
930 }
931 mfbi->fb_phys_addr = mfbi->fb_res->start;
932
933 mfbi->reg_req = request_mem_region(mfbi->reg_res->start,
934 res_size(mfbi->reg_res), dev->name);
935 if (mfbi->reg_req == NULL) {
936 dev_err(&dev->dev, "failed to claim Marathon registers\n");
937 ret = -EINVAL;
938 goto err2;
939 }
940 mfbi->reg_phys_addr = mfbi->reg_res->start;
941
942 mfbi->reg_virt_addr = ioremap_nocache(mfbi->reg_phys_addr,
943 res_size(mfbi->reg_req));
944 if (!mfbi->reg_virt_addr) {
945 dev_err(&dev->dev, "failed to ioremap Marathon registers\n");
946 ret = -EINVAL;
947 goto err3;
948 }
949 virt_base_2700 = mfbi->reg_virt_addr;
950
951 mfbi->fb_virt_addr = ioremap_nocache(mfbi->fb_phys_addr,
952 res_size(mfbi->fb_req));
953 if (!mfbi->reg_virt_addr) {
954 dev_err(&dev->dev, "failed to ioremap frame buffer\n");
955 ret = -EINVAL;
956 goto err4;
957 }
958
959 fbi->screen_base = (char __iomem *)(mfbi->fb_virt_addr + 0x60000);
960 fbi->screen_size = pdata->memsize;
961 fbi->fbops = &mbxfb_ops;
962
963 fbi->var = mbxfb_default;
964 fbi->fix = mbxfb_fix;
965 fbi->fix.smem_start = mfbi->fb_phys_addr + 0x60000;
966 fbi->fix.smem_len = pdata->memsize;
967 fbi->fix.line_length = mbxfb_default.xres_virtual *
968 mbxfb_default.bits_per_pixel / 8;
969
970 ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
971 if (ret < 0) {
972 dev_err(&dev->dev, "fb_alloc_cmap failed\n");
973 ret = -EINVAL;
974 goto err5;
975 }
976
977 platform_set_drvdata(dev, fbi);
978
979 printk(KERN_INFO "fb%d: mbx frame buffer device\n", fbi->node);
980
981 if (mfbi->platform_probe)
982 mfbi->platform_probe(fbi);
983
984 enable_controller(fbi);
985
986 mbxfb_debugfs_init(fbi);
987
988 ret = register_framebuffer(fbi);
989 if (ret < 0) {
990 dev_err(&dev->dev, "register_framebuffer failed\n");
991 ret = -EINVAL;
992 goto err6;
993 }
994
995 return 0;
996
997 err6:
998 fb_dealloc_cmap(&fbi->cmap);
999 err5:
1000 iounmap(mfbi->fb_virt_addr);
1001 err4:
1002 iounmap(mfbi->reg_virt_addr);
1003 err3:
1004 release_mem_region(mfbi->reg_res->start, res_size(mfbi->reg_res));
1005 err2:
1006 release_mem_region(mfbi->fb_res->start, res_size(mfbi->fb_res));
1007 err1:
1008 framebuffer_release(fbi);
1009
1010 return ret;
1011 }
1012
1013 static int __devexit mbxfb_remove(struct platform_device *dev)
1014 {
1015 struct fb_info *fbi = platform_get_drvdata(dev);
1016
1017 write_reg_dly(SYSRST_RST, SYSRST);
1018
1019 mbxfb_debugfs_remove(fbi);
1020
1021 if (fbi) {
1022 struct mbxfb_info *mfbi = fbi->par;
1023
1024 unregister_framebuffer(fbi);
1025 if (mfbi) {
1026 if (mfbi->platform_remove)
1027 mfbi->platform_remove(fbi);
1028
1029 if (mfbi->fb_virt_addr)
1030 iounmap(mfbi->fb_virt_addr);
1031 if (mfbi->reg_virt_addr)
1032 iounmap(mfbi->reg_virt_addr);
1033 if (mfbi->reg_req)
1034 release_mem_region(mfbi->reg_req->start,
1035 res_size(mfbi->reg_req));
1036 if (mfbi->fb_req)
1037 release_mem_region(mfbi->fb_req->start,
1038 res_size(mfbi->fb_req));
1039 }
1040 framebuffer_release(fbi);
1041 }
1042
1043 return 0;
1044 }
1045
1046 static struct platform_driver mbxfb_driver = {
1047 .probe = mbxfb_probe,
1048 .remove = mbxfb_remove,
1049 .suspend = mbxfb_suspend,
1050 .resume = mbxfb_resume,
1051 .driver = {
1052 .name = "mbx-fb",
1053 },
1054 };
1055
1056 module_platform_driver(mbxfb_driver);
1057
1058 MODULE_DESCRIPTION("loadable framebuffer driver for Marathon device");
1059 MODULE_AUTHOR("Mike Rapoport, Compulab");
1060 MODULE_LICENSE("GPL");